Merge branch 'master' into fix/create_library_thumbs_on_first_scan

12 files changed, 737 insertions, 112 deletions

diff --git a/tests/Jellyfin.MediaEncoding.Tests/Encoder/ApplePlatformHelperTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Encoder/ApplePlatformHelperTests.cs
new file mode 100644
index 0000000000..9847acbb0a
--- /dev/null
+++ b/tests/Jellyfin.MediaEncoding.Tests/Encoder/ApplePlatformHelperTests.cs
@@ -0,0 +1,22 @@
+using System;
+using System.Runtime.Versioning;
+using MediaBrowser.MediaEncoding.Encoder;
+using Xunit;
+
+namespace Jellyfin.MediaEncoding.Tests;
+
+[SupportedOSPlatform("macos")]
+public class ApplePlatformHelperTests
+{
+    [Fact]
+    public void GetSysctlValue_CpuBrand_NotEmpty()
+    {
+        Assert.SkipUnless(OperatingSystem.IsMacOS(), "macOS-only test");
+
+        var value = ApplePlatformHelper.GetSysctlValue("machdep.cpu.brand_string");
+        Assert.NotEmpty(value);
+
+        // Make sure we don't include the null terminator
+        Assert.DoesNotContain("\0", value, StringComparison.Ordinal);
+    }
+}
diff --git a/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTests.cs b/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTests.cs
index 988073074b..bfe6ade1fe 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTests.cs
+++ b/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTests.cs
@@ -24,6 +24,7 @@ namespace Jellyfin.MediaEncoding.Tests
         [InlineData(EncoderValidatorTestsData.FFmpegV44Output, true)]
         [InlineData(EncoderValidatorTestsData.FFmpegV432Output, false)]
         [InlineData(EncoderValidatorTestsData.FFmpegGitUnknownOutput2, true)]
+        [InlineData(EncoderValidatorTestsData.FFmpegGitWithoutLibpostprocOutput, true)]
         [InlineData(EncoderValidatorTestsData.FFmpegGitUnknownOutput, false)]
         public void ValidateVersionInternalTest(string versionOutput, bool valid)
         {
@@ -41,6 +42,7 @@ namespace Jellyfin.MediaEncoding.Tests
                 Add(EncoderValidatorTestsData.FFmpegV44Output, new Version(4, 4));
                 Add(EncoderValidatorTestsData.FFmpegV432Output, new Version(4, 3, 2));
                 Add(EncoderValidatorTestsData.FFmpegGitUnknownOutput2, new Version(4, 4));
+                Add(EncoderValidatorTestsData.FFmpegGitWithoutLibpostprocOutput, new Version(4, 4));
                 Add(EncoderValidatorTestsData.FFmpegGitUnknownOutput, null);
             }
         }
diff --git a/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTestsData.cs b/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTestsData.cs
index 1f2d618aa4..604b862fbe 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTestsData.cs
+++ b/tests/Jellyfin.MediaEncoding.Tests/EncoderValidatorTestsData.cs
@@ -86,6 +86,15 @@ libswscale      5.  9.100 /  5.  9.100
 libswresample   3.  9.100 /  3.  9.100
 libpostproc    55.  9.100 / 55.  9.100";
 
+        public const string FFmpegGitWithoutLibpostprocOutput = @"ffmpeg version N-122128-gdeadbeef Copyright (c) 2000-2026 the FFmpeg developers
+libavutil      60. 26.102 / 60. 26.102
+libavcodec     62. 28.102 / 62. 28.102
+libavformat    62. 12.102 / 62. 12.102
+libavdevice    62.  3.102 / 62.  3.102
+libavfilter    11. 14.102 / 11. 14.102
+libswscale      9.  5.102 /  9.  5.102
+libswresample   6.  3.102 /  6.  3.102";
+
         public const string FFmpegGitUnknownOutput = @"ffmpeg version N-45325-gb173e0353-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
 built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
 configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid --enable-libzimg
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Probing/ProbeResultNormalizerTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Probing/ProbeResultNormalizerTests.cs
index 198cdaa4fc..52e0b19700 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/Probing/ProbeResultNormalizerTests.cs
+++ b/tests/Jellyfin.MediaEncoding.Tests/Probing/ProbeResultNormalizerTests.cs
@@ -1,6 +1,7 @@
 using System;
 using System.Globalization;
 using System.IO;
+using System.Linq;
 using System.Text.Json;
 using Jellyfin.Data.Enums;
 using Jellyfin.Extensions.Json;
@@ -56,6 +57,43 @@ namespace Jellyfin.MediaEncoding.Tests.Probing
         public void IsNearSquarePixelSar_DetectsCorrectly(string? sar, bool expected)
             => Assert.Equal(expected, ProbeResultNormalizer.IsNearSquarePixelSar(sar));
 
+        [Theory]
+        // Lossy codecs, mono/stereo and multichannel.
+        [InlineData("aac", null, 2, 192000)]
+        [InlineData("mp3", null, 2, 192000)]
+        [InlineData("mp2", null, 2, 192000)]
+        [InlineData("aac", null, 6, 320000)]
+        [InlineData("ac3", null, 2, 192000)]
+        [InlineData("eac3", null, 6, 640000)]
+        [InlineData("opus", null, 2, 128000)]
+        [InlineData("vorbis", null, 6, 320000)]
+        [InlineData("wmav2", null, 2, 192000)]
+        // DTS: the lossy core (any non-MA profile, or none) is flat and caps at 5.1...
+        [InlineData("dts", null, 2, 768000)]
+        [InlineData("dts", "DTS", 6, 1509000)]
+        [InlineData("dts", "DTS-HD HRA", 8, 1509000)]
+        // ...while lossless DTS-HD MA scales per channel like other lossless codecs.
+        [InlineData("dts", "DTS-HD MA", 6, 4200000)]
+        [InlineData("dts", "DTS-HD MA + DTS:X", 8, 5600000)]
+        // Lossless codecs scale per channel.
+        [InlineData("flac", null, 2, 960000)]
+        [InlineData("flac", null, 6, 2880000)]
+        [InlineData("flac", null, 8, 3840000)]
+        [InlineData("alac", null, 6, 2880000)]
+        [InlineData("truehd", null, 2, 1400000)]
+        [InlineData("truehd", null, 6, 4200000)]
+        [InlineData("truehd", "Dolby TrueHD + Dolby Atmos", 8, 5600000)]
+        // 3-4 channel audio must use the multichannel estimate, not return null.
+        [InlineData("aac", null, 3, 320000)]
+        [InlineData("ac3", null, 4, 640000)]
+        // Codec matching is case-insensitive.
+        [InlineData("AAC", null, 2, 192000)]
+        // Unknown codec or unknown channel count cannot be estimated.
+        [InlineData("pcm_s16le", null, 2, null)]
+        [InlineData("aac", null, null, null)]
+        public void GetEstimatedAudioBitrate_ReturnsExpected(string codec, string? profile, int? channels, int? expected)
+            => Assert.Equal(expected, ProbeResultNormalizer.GetEstimatedAudioBitrate(codec, profile, channels));
+
         [Fact]
         public void GetMediaInfo_MetaData_Success()
         {
@@ -71,7 +109,10 @@ namespace Jellyfin.MediaEncoding.Tests.Probing
             Assert.Equal("4:3", res.VideoStream.AspectRatio);
             Assert.Equal(25f, res.VideoStream.AverageFrameRate);
             Assert.Equal(8, res.VideoStream.BitDepth);
-            Assert.Equal(69432, res.VideoStream.BitRate);
+            // ffprobe reports no per-stream video bitrate here. The container bitrate must not be
+            // misreported as the video bitrate, and the other streams' bitrates exceed the container
+            // bitrate in this sample, so no sensible video bitrate can be inferred (see #16248).
+            Assert.Null(res.VideoStream.BitRate);
             Assert.Equal("h264", res.VideoStream.Codec);
             Assert.Equal("1/50", res.VideoStream.CodecTimeBase);
             Assert.Equal(240, res.VideoStream.Height);
@@ -178,7 +219,7 @@ namespace Jellyfin.MediaEncoding.Tests.Probing
             Assert.Equal("eng", res.MediaStreams[4].Language);
             Assert.Equal(MediaStreamType.Subtitle, res.MediaStreams[4].Type);
             Assert.Equal("mov_text", res.MediaStreams[4].Codec);
-            Assert.Null(res.MediaStreams[4].Title);
+            Assert.Equal("SDH", res.MediaStreams[4].Title);
             Assert.True(res.MediaStreams[4].IsHearingImpaired);
 
             Assert.Equal("eng", res.MediaStreams[5].Language);
@@ -322,6 +363,73 @@ namespace Jellyfin.MediaEncoding.Tests.Probing
         }
 
         [Fact]
+        public void GetMediaInfo_MissingVideoBitrate_EstimatedFromContainer()
+        {
+            // ffprobe did not report a per-stream video bitrate. The video bitrate must be estimated
+            // as the container bitrate minus the other (audio) stream bitrates, not reported as the
+            // whole container bitrate (see #16248).
+            var bytes = File.ReadAllBytes("Test Data/Probing/video_missing_video_bitrate.json");
+
+            var internalMediaInfoResult = JsonSerializer.Deserialize<InternalMediaInfoResult>(bytes, _jsonOptions);
+            MediaInfo res = _probeResultNormalizer.GetMediaInfo(internalMediaInfoResult, VideoType.VideoFile, false, "Test Data/Probing/video_missing_video_bitrate.mp4", MediaProtocol.File);
+
+            Assert.Equal(2, res.MediaStreams.Count);
+
+            Assert.NotNull(res.VideoStream);
+            Assert.Equal(MediaStreamType.Video, res.VideoStream.Type);
+
+            var audioStream = res.MediaStreams.First(i => i.Type == MediaStreamType.Audio);
+            Assert.Equal(128000, audioStream.BitRate);
+
+            // Container bitrate (5128000) minus the audio bitrate (128000).
+            Assert.Equal(5000000, res.VideoStream.BitRate);
+
+            // The container bitrate itself must remain the overall container bitrate.
+            Assert.Equal(5128000, res.Bitrate);
+        }
+
+        [Fact]
+        public void GetMediaInfo_NanosecondDurationTag_BitrateComputedFromBytes()
+        {
+            // The stream carries NUMBER_OF_BYTES and a nanosecond-precision DURATION tag but no
+            // bitrate. TimeSpan only supports 7 fractional digits, so the 9-digit DURATION must be
+            // trimmed for the duration to parse and the bitrate to be computed (bytes * 8 / seconds).
+            var bytes = File.ReadAllBytes("Test Data/Probing/video_nanosecond_duration_bitrate.json");
+
+            var internalMediaInfoResult = JsonSerializer.Deserialize<InternalMediaInfoResult>(bytes, _jsonOptions);
+            MediaInfo res = _probeResultNormalizer.GetMediaInfo(internalMediaInfoResult, VideoType.VideoFile, false, "Test Data/Probing/video_nanosecond_duration_bitrate.mkv", MediaProtocol.File);
+
+            Assert.NotNull(res.VideoStream);
+
+            // 10000000 bytes * 8 / 100 seconds.
+            Assert.Equal(800000, res.VideoStream.BitRate);
+        }
+
+        [Fact]
+        public void GetMediaInfo_MissingVideoBitrate_UnknownAudioBitrate_NotEstimated()
+        {
+            // ffprobe reported no per-stream video bitrate and the audio bitrate cannot be estimated
+            // (the audio stream has no channel count, so GetEstimatedAudioBitrate returns null). The
+            // video bitrate must be left unset rather than wrongly absorbing the unaccounted audio
+            // bitrate (see #16248).
+            var bytes = File.ReadAllBytes("Test Data/Probing/video_missing_video_bitrate_unknown_audio.json");
+
+            var internalMediaInfoResult = JsonSerializer.Deserialize<InternalMediaInfoResult>(bytes, _jsonOptions);
+            MediaInfo res = _probeResultNormalizer.GetMediaInfo(internalMediaInfoResult, VideoType.VideoFile, false, "Test Data/Probing/video_missing_video_bitrate_unknown_audio.mp4", MediaProtocol.File);
+
+            Assert.Equal(2, res.MediaStreams.Count);
+
+            Assert.NotNull(res.VideoStream);
+            Assert.Null(res.VideoStream.BitRate);
+
+            var audioStream = res.MediaStreams.First(i => i.Type == MediaStreamType.Audio);
+            Assert.Null(audioStream.BitRate);
+
+            // The overall container bitrate is still reported.
+            Assert.Equal(5128000, res.Bitrate);
+        }
+
+        [Fact]
         public void GetMediaInfo_VideoWithSingleFrameMjpeg_Success()
         {
             var bytes = File.ReadAllBytes("Test Data/Probing/video_single_frame_mjpeg.json");
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs
index 1f908d7e0e..b03651e5e9 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs
+++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/AssParserTests.cs
@@ -15,13 +15,13 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests
             using var stream = File.OpenRead("Test Data/example.ass");
 
             var parsed = new SubtitleEditParser(new NullLogger<SubtitleEditParser>()).Parse(stream, "ass");
-            Assert.Single(parsed.TrackEvents);
-            var trackEvent = parsed.TrackEvents[0];
+            Assert.Single(parsed.Paragraphs);
+            var paragraph = parsed.Paragraphs[0];
 
-            Assert.Equal("1", trackEvent.Id);
-            Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, trackEvent.StartPositionTicks);
-            Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, trackEvent.EndPositionTicks);
-            Assert.Equal("{\\pos(400,570)}Like an Angel with pity on nobody" + Environment.NewLine + "The second line in subtitle", trackEvent.Text);
+            Assert.Equal(1, paragraph.Number);
+            Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, paragraph.StartTime.TimeSpan.Ticks);
+            Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, paragraph.EndTime.TimeSpan.Ticks);
+            Assert.Equal("{\\pos(400,570)}Like an Angel with pity on nobody" + Environment.NewLine + "The second line in subtitle", paragraph.Text);
         }
     }
 }
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs
index b7152961cd..01a35e6cb0 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs
+++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SrtParserTests.cs
@@ -15,19 +15,19 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests
             using var stream = File.OpenRead("Test Data/example.srt");
 
             var parsed = new SubtitleEditParser(new NullLogger<SubtitleEditParser>()).Parse(stream, "srt");
-            Assert.Equal(2, parsed.TrackEvents.Count);
-
-            var trackEvent1 = parsed.TrackEvents[0];
-            Assert.Equal("1", trackEvent1.Id);
-            Assert.Equal(TimeSpan.Parse("00:02:17.440", CultureInfo.InvariantCulture).Ticks, trackEvent1.StartPositionTicks);
-            Assert.Equal(TimeSpan.Parse("00:02:20.375", CultureInfo.InvariantCulture).Ticks, trackEvent1.EndPositionTicks);
-            Assert.Equal("Senator, we're making" + Environment.NewLine + "our final approach into Coruscant.", trackEvent1.Text);
-
-            var trackEvent2 = parsed.TrackEvents[1];
-            Assert.Equal("2", trackEvent2.Id);
-            Assert.Equal(TimeSpan.Parse("00:02:20.476", CultureInfo.InvariantCulture).Ticks, trackEvent2.StartPositionTicks);
-            Assert.Equal(TimeSpan.Parse("00:02:22.501", CultureInfo.InvariantCulture).Ticks, trackEvent2.EndPositionTicks);
-            Assert.Equal("Very good, Lieutenant.", trackEvent2.Text);
+            Assert.Equal(2, parsed.Paragraphs.Count);
+
+            var paragraph1 = parsed.Paragraphs[0];
+            Assert.Equal(1, paragraph1.Number);
+            Assert.Equal(TimeSpan.Parse("00:02:17.440", CultureInfo.InvariantCulture).Ticks, paragraph1.StartTime.TimeSpan.Ticks);
+            Assert.Equal(TimeSpan.Parse("00:02:20.375", CultureInfo.InvariantCulture).Ticks, paragraph1.EndTime.TimeSpan.Ticks);
+            Assert.Equal("Senator, we're making" + Environment.NewLine + "our final approach into Coruscant.", paragraph1.Text);
+
+            var paragraph2 = parsed.Paragraphs[1];
+            Assert.Equal(2, paragraph2.Number);
+            Assert.Equal(TimeSpan.Parse("00:02:20.476", CultureInfo.InvariantCulture).Ticks, paragraph2.StartTime.TimeSpan.Ticks);
+            Assert.Equal(TimeSpan.Parse("00:02:22.501", CultureInfo.InvariantCulture).Ticks, paragraph2.EndTime.TimeSpan.Ticks);
+            Assert.Equal("Very good, Lieutenant.", paragraph2.Text);
         }
 
         [Fact]
@@ -36,19 +36,19 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests
             using var stream = File.OpenRead("Test Data/example2.srt");
 
             var parsed = new SubtitleEditParser(new NullLogger<SubtitleEditParser>()).Parse(stream, "srt");
-            Assert.Equal(2, parsed.TrackEvents.Count);
-
-            var trackEvent1 = parsed.TrackEvents[0];
-            Assert.Equal("311", trackEvent1.Id);
-            Assert.Equal(TimeSpan.Parse("00:16:46.465", CultureInfo.InvariantCulture).Ticks, trackEvent1.StartPositionTicks);
-            Assert.Equal(TimeSpan.Parse("00:16:49.009", CultureInfo.InvariantCulture).Ticks, trackEvent1.EndPositionTicks);
-            Assert.Equal("Una vez que la gente se entere" + Environment.NewLine + Environment.NewLine + "de que ustedes están aquí,", trackEvent1.Text);
-
-            var trackEvent2 = parsed.TrackEvents[1];
-            Assert.Equal("312", trackEvent2.Id);
-            Assert.Equal(TimeSpan.Parse("00:16:49.092", CultureInfo.InvariantCulture).Ticks, trackEvent2.StartPositionTicks);
-            Assert.Equal(TimeSpan.Parse("00:16:51.470", CultureInfo.InvariantCulture).Ticks, trackEvent2.EndPositionTicks);
-            Assert.Equal("este lugar se convertirá" + Environment.NewLine + Environment.NewLine + "en un maldito zoológico.", trackEvent2.Text);
+            Assert.Equal(2, parsed.Paragraphs.Count);
+
+            var paragraph1 = parsed.Paragraphs[0];
+            Assert.Equal(311, paragraph1.Number);
+            Assert.Equal(TimeSpan.Parse("00:16:46.465", CultureInfo.InvariantCulture).Ticks, paragraph1.StartTime.TimeSpan.Ticks);
+            Assert.Equal(TimeSpan.Parse("00:16:49.009", CultureInfo.InvariantCulture).Ticks, paragraph1.EndTime.TimeSpan.Ticks);
+            Assert.Equal("Una vez que la gente se entere" + Environment.NewLine + Environment.NewLine + "de que ustedes están aquí,", paragraph1.Text);
+
+            var paragraph2 = parsed.Paragraphs[1];
+            Assert.Equal(312, paragraph2.Number);
+            Assert.Equal(TimeSpan.Parse("00:16:49.092", CultureInfo.InvariantCulture).Ticks, paragraph2.StartTime.TimeSpan.Ticks);
+            Assert.Equal(TimeSpan.Parse("00:16:51.470", CultureInfo.InvariantCulture).Ticks, paragraph2.EndTime.TimeSpan.Ticks);
+            Assert.Equal("este lugar se convertirá" + Environment.NewLine + Environment.NewLine + "en un maldito zoológico.", paragraph2.Text);
         }
     }
 }
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs
index 5b7aa7eaa9..d814088593 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs
+++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SsaParserTests.cs
@@ -20,19 +20,19 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests
         {
             using Stream stream = new MemoryStream(Encoding.UTF8.GetBytes(ssa));
 
-            SubtitleTrackInfo subtitleTrackInfo = _parser.Parse(stream, "ssa");
+            var subtitle = _parser.Parse(stream, "ssa");
 
-            Assert.Equal(expectedSubtitleTrackEvents.Count, subtitleTrackInfo.TrackEvents.Count);
+            Assert.Equal(expectedSubtitleTrackEvents.Count, subtitle.Paragraphs.Count);
 
             for (int i = 0; i < expectedSubtitleTrackEvents.Count; ++i)
             {
                 SubtitleTrackEvent expected = expectedSubtitleTrackEvents[i];
-                SubtitleTrackEvent actual = subtitleTrackInfo.TrackEvents[i];
+                var actual = subtitle.Paragraphs[i];
 
-                Assert.Equal(expected.Id, actual.Id);
+                Assert.Equal(expected.Id, actual.Number.ToString(CultureInfo.InvariantCulture));
                 Assert.Equal(expected.Text, actual.Text);
-                Assert.Equal(expected.StartPositionTicks, actual.StartPositionTicks);
-                Assert.Equal(expected.EndPositionTicks, actual.EndPositionTicks);
+                Assert.Equal(expected.StartPositionTicks, actual.StartTime.TimeSpan.Ticks);
+                Assert.Equal(expected.EndPositionTicks, actual.EndTime.TimeSpan.Ticks);
             }
         }
 
@@ -75,13 +75,13 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests
             using var stream = File.OpenRead("Test Data/example.ssa");
 
             var parsed = _parser.Parse(stream, "ssa");
-            Assert.Single(parsed.TrackEvents);
-            var trackEvent = parsed.TrackEvents[0];
+            Assert.Single(parsed.Paragraphs);
+            var paragraph = parsed.Paragraphs[0];
 
-            Assert.Equal("1", trackEvent.Id);
-            Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, trackEvent.StartPositionTicks);
-            Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, trackEvent.EndPositionTicks);
-            Assert.Equal("{\\pos(400,570)}Like an angel with pity on nobody", trackEvent.Text);
+            Assert.Equal(1, paragraph.Number);
+            Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, paragraph.StartTime.TimeSpan.Ticks);
+            Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, paragraph.EndTime.TimeSpan.Ticks);
+            Assert.Equal("{\\pos(400,570)}Like an angel with pity on nobody", paragraph.Text);
         }
     }
 }
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs
index ce1f005f40..48850b2f67 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs
+++ b/tests/Jellyfin.MediaEncoding.Tests/Subtitles/SubtitleEncoderTests.cs
@@ -1,3 +1,8 @@
+using System;
+using System.Globalization;
+using System.IO;
+using System.Linq;
+using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using AutoFixture;
@@ -6,87 +11,120 @@ using MediaBrowser.MediaEncoding.Subtitles;
 using MediaBrowser.Model.Dto;
 using MediaBrowser.Model.Entities;
 using MediaBrowser.Model.MediaInfo;
+using Microsoft.Extensions.Logging.Abstractions;
 using Xunit;
 
 namespace Jellyfin.MediaEncoding.Subtitles.Tests
 {
     public class SubtitleEncoderTests
     {
-        public static TheoryData<MediaSourceInfo, MediaStream, SubtitleEncoder.SubtitleInfo> GetReadableFile_Valid_TestData()
+        private const int StreamCount = 8;
+        private const int CueCount = 500;
+
+        // A Greek line that requires a non-UTF-8 legacy encoding to reproduce the bug. The accented
+        // characters (ά, έ, ή, ί, ό, ύ, ώ) share the same code points in windows-1253 and iso-8859-7,
+        // so a Greek-vs-Greek charset misdetection still round-trips correctly.
+        private const string GreekText = "Καλημέρα κόσμε, αυτό είναι ένας υπότιτλος.";
+
+        static SubtitleEncoderTests()
         {
-            var data = new TheoryData<MediaSourceInfo, MediaStream, SubtitleEncoder.SubtitleInfo>();
+            // Mirrors Jellyfin.Server startup so legacy code pages (e.g. Greek windows-1253) are available.
+            Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
+        }
 
-            data.Add(
-                new MediaSourceInfo()
-                {
-                    Protocol = MediaProtocol.File
-                },
-                new MediaStream()
-                {
-                    Path = "/media/sub.ass",
-                    IsExternal = true
-                },
-                new SubtitleEncoder.SubtitleInfo()
-                {
-                    Path = "/media/sub.ass",
-                    Protocol = MediaProtocol.File,
-                    Format = "ass",
-                    IsExternal = true
-                });
+        // Enough Greek text to give the charset detector a strong, unambiguous signal.
+        private static string BuildGreekSrt()
+        {
+            var builder = new StringBuilder();
+            for (var i = 1; i <= 8; i++)
+            {
+                builder.Append(i.ToString(CultureInfo.InvariantCulture)).Append('\n');
+                builder.Append("00:00:0").Append(i.ToString(CultureInfo.InvariantCulture))
+                    .Append(",000 --> 00:00:0").Append((i + 1).ToString(CultureInfo.InvariantCulture)).Append(",000\n");
+                builder.Append(GreekText).Append('\n');
+                builder.Append("Η γρήγορη καφέ αλεπού πηδάει πάνω από το τεμπέλικο σκυλί.\n\n");
+            }
 
-            data.Add(
-                new MediaSourceInfo()
-                {
-                    Protocol = MediaProtocol.File
-                },
-                new MediaStream()
-                {
-                    Path = "/media/sub.ssa",
-                    IsExternal = true
-                },
-                new SubtitleEncoder.SubtitleInfo()
-                {
-                    Path = "/media/sub.ssa",
-                    Protocol = MediaProtocol.File,
-                    Format = "ssa",
-                    IsExternal = true
-                });
+            return builder.ToString();
+        }
 
-            data.Add(
-                new MediaSourceInfo()
-                {
-                    Protocol = MediaProtocol.File
-                },
-                new MediaStream()
+        public static TheoryData<MediaSourceInfo, MediaStream, SubtitleEncoder.SubtitleInfo> GetReadableFile_Valid_TestData()
+        {
+            var data = new TheoryData<MediaSourceInfo, MediaStream, SubtitleEncoder.SubtitleInfo>
+            {
                 {
-                    Path = "/media/sub.srt",
-                    IsExternal = true
+                    new MediaSourceInfo()
+                    {
+                        Protocol = MediaProtocol.File
+                    },
+                    new MediaStream()
+                    {
+                        Path = "/media/sub.ass",
+                        IsExternal = true
+                    },
+                    new SubtitleEncoder.SubtitleInfo()
+                    {
+                        Path = "/media/sub.ass",
+                        Protocol = MediaProtocol.File,
+                        Format = "ass",
+                        IsExternal = true
+                    }
                 },
-                new SubtitleEncoder.SubtitleInfo()
-                {
-                    Path = "/media/sub.srt",
-                    Protocol = MediaProtocol.File,
-                    Format = "srt",
-                    IsExternal = true
-                });
-
-            data.Add(
-                new MediaSourceInfo()
                 {
-                    Protocol = MediaProtocol.Http
+                    new MediaSourceInfo()
+                    {
+                        Protocol = MediaProtocol.File
+                    },
+                    new MediaStream()
+                    {
+                        Path = "/media/sub.ssa",
+                        IsExternal = true
+                    },
+                    new SubtitleEncoder.SubtitleInfo()
+                    {
+                        Path = "/media/sub.ssa",
+                        Protocol = MediaProtocol.File,
+                        Format = "ssa",
+                        IsExternal = true
+                    }
                 },
-                new MediaStream()
                 {
-                    Path = "/media/sub.ass",
-                    IsExternal = true
+                    new MediaSourceInfo()
+                    {
+                        Protocol = MediaProtocol.File
+                    },
+                    new MediaStream()
+                    {
+                        Path = "/media/sub.srt",
+                        IsExternal = true
+                    },
+                    new SubtitleEncoder.SubtitleInfo()
+                    {
+                        Path = "/media/sub.srt",
+                        Protocol = MediaProtocol.File,
+                        Format = "srt",
+                        IsExternal = true
+                    }
                 },
-                new SubtitleEncoder.SubtitleInfo()
                 {
-                    Path = "/media/sub.ass",
-                    Protocol = MediaProtocol.File,
-                    Format = "ass",
-                    IsExternal = true
-                });
+                    new MediaSourceInfo()
+                    {
+                        Protocol = MediaProtocol.Http
+                    },
+                    new MediaStream()
+                    {
+                        Path = "/media/sub.ass",
+                        IsExternal = true
+                    },
+                    new SubtitleEncoder.SubtitleInfo()
+                    {
+                        Path = "/media/sub.ass",
+                        Protocol = MediaProtocol.File,
+                        Format = "ass",
+                        IsExternal = true
+                    }
+                }
+            };
 
             return data;
         }
@@ -103,5 +141,177 @@ namespace Jellyfin.MediaEncoding.Subtitles.Tests
             Assert.Equal(subtitleInfo.Format, result.Format);
             Assert.Equal(subtitleInfo.IsExternal, result.IsExternal);
         }
+
+        public static TheoryData<Encoding> GetSubtitleStream_NonUtf8LocalFile_TestData()
+        {
+            return
+            [
+                // Greek legacy encodings – the exact scenario reported in issue #17267.
+                Encoding.GetEncoding("windows-1253"),
+                Encoding.GetEncoding("iso-8859-7"),
+                // Wide encoding with a BOM.
+                new UnicodeEncoding(bigEndian: false, byteOrderMark: true),
+            ];
+        }
+
+        [Theory]
+        [MemberData(nameof(GetSubtitleStream_NonUtf8LocalFile_TestData))]
+        public async Task GetSubtitleStream_NonUtf8LocalFile_ConvertedToUtf8(Encoding sourceEncoding)
+        {
+            var cancellationToken = TestContext.Current.CancellationToken;
+            var srt = BuildGreekSrt();
+            var path = Path.GetTempFileName();
+            try
+            {
+                await File.WriteAllTextAsync(path, srt, sourceEncoding, cancellationToken);
+
+                var fixture = new Fixture().Customize(new AutoMoqCustomization { ConfigureMembers = true });
+                var subtitleEncoder = fixture.Create<SubtitleEncoder>();
+
+                var fileInfo = new SubtitleEncoder.SubtitleInfo
+                {
+                    Path = path,
+                    Protocol = MediaProtocol.File,
+                    Format = "srt",
+                    IsExternal = true
+                };
+
+                using var stream = await subtitleEncoder.GetSubtitleStream(fileInfo, cancellationToken);
+                using var reader = new StreamReader(stream, new UTF8Encoding(false));
+                var text = await reader.ReadToEndAsync(cancellationToken);
+
+                // The Greek text must survive round-trip and contain no replacement characters.
+                Assert.Contains(GreekText, text, StringComparison.Ordinal);
+                Assert.DoesNotContain('�', text);
+                Assert.DoesNotContain('?', text);
+            }
+            finally
+            {
+                File.Delete(path);
+            }
+        }
+
+        [Fact]
+        public void ConvertSubtitles_SequentialCalls_AreDeterministic()
+        {
+            using var encoder = CreateEncoder();
+            var sources = GenerateSources();
+
+            var first = ConvertAllSequential(encoder, sources);
+            var second = ConvertAllSequential(encoder, sources);
+
+            for (var i = 0; i < StreamCount; i++)
+            {
+                Assert.Contains($"S{i}C{CueCount - 1}", first[i], StringComparison.Ordinal);
+                Assert.Equal(first[i], second[i]);
+            }
+        }
+
+        [Fact]
+        public async Task GetSubtitleStream_Utf8LocalFile_PreservesContent()
+        {
+            var cancellationToken = TestContext.Current.CancellationToken;
+            var srt = BuildGreekSrt();
+            var path = Path.GetTempFileName();
+            try
+            {
+                await File.WriteAllTextAsync(path, srt, new UTF8Encoding(false), cancellationToken);
+
+                var fixture = new Fixture().Customize(new AutoMoqCustomization { ConfigureMembers = true });
+                var subtitleEncoder = fixture.Create<SubtitleEncoder>();
+
+                var fileInfo = new SubtitleEncoder.SubtitleInfo
+                {
+                    Path = path,
+                    Protocol = MediaProtocol.File,
+                    Format = "srt",
+                    IsExternal = true
+                };
+
+                using var stream = await subtitleEncoder.GetSubtitleStream(fileInfo, cancellationToken);
+
+                // An already-UTF-8 file must be short-circuited and served directly from disk,
+                // not read into memory and re-encoded (which would produce a MemoryStream).
+                Assert.IsNotType<MemoryStream>(stream);
+
+                using var reader = new StreamReader(stream, new UTF8Encoding(false));
+                var text = await reader.ReadToEndAsync(cancellationToken);
+
+                Assert.Contains(GreekText, text, StringComparison.Ordinal);
+            }
+            finally
+            {
+                File.Delete(path);
+            }
+        }
+
+        [Fact]
+        public async Task ConvertSubtitles_ConcurrentCalls_MatchSequentialBaseline()
+        {
+            const int Iterations = 10;
+
+            using var encoder = CreateEncoder();
+            var sources = GenerateSources();
+            var baseline = ConvertAllSequential(encoder, sources);
+
+            for (var iteration = 0; iteration < Iterations; iteration++)
+            {
+                var results = await Task.WhenAll(Enumerable.Range(0, StreamCount)
+                    .Select(i => Task.Run(() => Convert(encoder, sources[i], i)))
+                    .ToArray());
+
+                for (var i = 0; i < StreamCount; i++)
+                {
+                    Assert.True(
+                        string.Equals(baseline[i], results[i], StringComparison.Ordinal),
+                        $"Iteration {iteration}: stream {i} returned corrupted content ({results[i].Length} chars vs {baseline[i].Length} baseline)");
+                }
+            }
+        }
+
+        private static SubtitleEncoder CreateEncoder()
+        {
+            var fixture = new Fixture().Customize(new AutoMoqCustomization { ConfigureMembers = true });
+            fixture.Inject<ISubtitleParser>(new SubtitleEditParser(NullLogger<SubtitleEditParser>.Instance));
+            return fixture.Create<SubtitleEncoder>();
+        }
+
+        private static byte[][] GenerateSources()
+        {
+            return Enumerable.Range(0, StreamCount)
+                .Select(i => Encoding.UTF8.GetBytes(GenerateSrt(i, CueCount)))
+                .ToArray();
+        }
+
+        private static string Convert(SubtitleEncoder encoder, byte[] source, int streamIndex)
+        {
+            using var input = new MemoryStream(source);
+            var info = new SubtitleEncoder.SubtitleInfo { Path = $"track{streamIndex}.srt", Format = "srt" };
+            using var output = encoder.ConvertSubtitles(input, info, "vtt", 0, 0, false);
+            return Encoding.UTF8.GetString(output.ToArray());
+        }
+
+        private static string[] ConvertAllSequential(SubtitleEncoder encoder, byte[][] sources)
+        {
+            return sources.Select((source, i) => Convert(encoder, source, i)).ToArray();
+        }
+
+        private static string GenerateSrt(int streamIndex, int cueCount)
+        {
+            var builder = new StringBuilder();
+            for (var i = 0; i < cueCount; i++)
+            {
+                var start = TimeSpan.FromSeconds(i * 4);
+                var end = start + TimeSpan.FromSeconds(2);
+                builder.Append(i + 1).AppendLine()
+                    .Append(start.ToString(@"hh\:mm\:ss\,fff", CultureInfo.InvariantCulture))
+                    .Append(" --> ")
+                    .AppendLine(end.ToString(@"hh\:mm\:ss\,fff", CultureInfo.InvariantCulture))
+                    .Append('S').Append(streamIndex).Append('C').Append(i).AppendLine()
+                    .AppendLine();
+            }
+
+            return builder.ToString();
+        }
     }
 }
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_missing_video_bitrate.json b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_missing_video_bitrate.json
new file mode 100644
index 0000000000..803a3a7e5f
--- /dev/null
+++ b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_missing_video_bitrate.json
@@ -0,0 +1,113 @@
+{
+    "streams": [
+        {
+            "index": 0,
+            "codec_name": "h264",
+            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
+            "profile": "High",
+            "codec_type": "video",
+            "codec_time_base": "1/48",
+            "codec_tag_string": "avc1",
+            "codec_tag": "0x31637661",
+            "width": 1920,
+            "height": 1080,
+            "coded_width": 1920,
+            "coded_height": 1080,
+            "closed_captions": 0,
+            "has_b_frames": 2,
+            "pix_fmt": "yuv420p",
+            "level": 40,
+            "chroma_location": "left",
+            "refs": 1,
+            "is_avc": "true",
+            "nal_length_size": "4",
+            "r_frame_rate": "24/1",
+            "avg_frame_rate": "24/1",
+            "time_base": "1/12288",
+            "start_pts": 0,
+            "start_time": "0.000000",
+            "duration_ts": 3686400,
+            "duration": "300.000000",
+            "bits_per_raw_sample": "8",
+            "nb_frames": "7200",
+            "disposition": {
+                "default": 1,
+                "dub": 0,
+                "original": 0,
+                "comment": 0,
+                "lyrics": 0,
+                "karaoke": 0,
+                "forced": 0,
+                "hearing_impaired": 0,
+                "visual_impaired": 0,
+                "clean_effects": 0,
+                "attached_pic": 0,
+                "timed_thumbnails": 0
+            },
+            "tags": {
+                "language": "und",
+                "handler_name": "VideoHandler"
+            }
+        },
+        {
+            "index": 1,
+            "codec_name": "aac",
+            "codec_long_name": "AAC (Advanced Audio Coding)",
+            "profile": "LC",
+            "codec_type": "audio",
+            "codec_time_base": "1/48000",
+            "codec_tag_string": "mp4a",
+            "codec_tag": "0x6134706d",
+            "sample_fmt": "fltp",
+            "sample_rate": "48000",
+            "channels": 2,
+            "channel_layout": "stereo",
+            "bits_per_sample": 0,
+            "r_frame_rate": "0/0",
+            "avg_frame_rate": "0/0",
+            "time_base": "1/48000",
+            "start_pts": 0,
+            "start_time": "0.000000",
+            "duration_ts": 14400000,
+            "duration": "300.000000",
+            "bit_rate": "128000",
+            "nb_frames": "14063",
+            "disposition": {
+                "default": 1,
+                "dub": 0,
+                "original": 0,
+                "comment": 0,
+                "lyrics": 0,
+                "karaoke": 0,
+                "forced": 0,
+                "hearing_impaired": 0,
+                "visual_impaired": 0,
+                "clean_effects": 0,
+                "attached_pic": 0,
+                "timed_thumbnails": 0
+            },
+            "tags": {
+                "language": "eng",
+                "handler_name": "SoundHandler"
+            }
+        }
+    ],
+    "format": {
+        "filename": "test.1080p.mp4",
+        "nb_streams": 2,
+        "nb_programs": 0,
+        "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
+        "format_long_name": "QuickTime / MOV",
+        "start_time": "0.000000",
+        "duration": "300.000000",
+        "size": "192000000",
+        "bit_rate": "5128000",
+        "probe_score": 100,
+        "tags": {
+            "major_brand": "isom",
+            "minor_version": "512",
+            "compatible_brands": "isomiso2avc1mp41",
+            "encoder": "Lavf58.20.100"
+        }
+    }
+}
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_missing_video_bitrate_unknown_audio.json b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_missing_video_bitrate_unknown_audio.json
new file mode 100644
index 0000000000..ff6dc51f27
--- /dev/null
+++ b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_missing_video_bitrate_unknown_audio.json
@@ -0,0 +1,110 @@
+{
+    "streams": [
+        {
+            "index": 0,
+            "codec_name": "h264",
+            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
+            "profile": "High",
+            "codec_type": "video",
+            "codec_time_base": "1/48",
+            "codec_tag_string": "avc1",
+            "codec_tag": "0x31637661",
+            "width": 1920,
+            "height": 1080,
+            "coded_width": 1920,
+            "coded_height": 1080,
+            "closed_captions": 0,
+            "has_b_frames": 2,
+            "pix_fmt": "yuv420p",
+            "level": 40,
+            "chroma_location": "left",
+            "refs": 1,
+            "is_avc": "true",
+            "nal_length_size": "4",
+            "r_frame_rate": "24/1",
+            "avg_frame_rate": "24/1",
+            "time_base": "1/12288",
+            "start_pts": 0,
+            "start_time": "0.000000",
+            "duration_ts": 3686400,
+            "duration": "300.000000",
+            "bits_per_raw_sample": "8",
+            "nb_frames": "7200",
+            "disposition": {
+                "default": 1,
+                "dub": 0,
+                "original": 0,
+                "comment": 0,
+                "lyrics": 0,
+                "karaoke": 0,
+                "forced": 0,
+                "hearing_impaired": 0,
+                "visual_impaired": 0,
+                "clean_effects": 0,
+                "attached_pic": 0,
+                "timed_thumbnails": 0
+            },
+            "tags": {
+                "language": "und",
+                "handler_name": "VideoHandler"
+            }
+        },
+        {
+            "index": 1,
+            "codec_name": "dts",
+            "codec_long_name": "DCA (DTS Coherent Acoustics)",
+            "profile": "DTS-HD MA",
+            "codec_type": "audio",
+            "codec_time_base": "1/48000",
+            "codec_tag_string": "[0][0][0][0]",
+            "codec_tag": "0x0000",
+            "sample_fmt": "s32p",
+            "sample_rate": "48000",
+            "bits_per_sample": 0,
+            "r_frame_rate": "0/0",
+            "avg_frame_rate": "0/0",
+            "time_base": "1/48000",
+            "start_pts": 0,
+            "start_time": "0.000000",
+            "duration_ts": 14400000,
+            "duration": "300.000000",
+            "nb_frames": "14063",
+            "disposition": {
+                "default": 1,
+                "dub": 0,
+                "original": 0,
+                "comment": 0,
+                "lyrics": 0,
+                "karaoke": 0,
+                "forced": 0,
+                "hearing_impaired": 0,
+                "visual_impaired": 0,
+                "clean_effects": 0,
+                "attached_pic": 0,
+                "timed_thumbnails": 0
+            },
+            "tags": {
+                "language": "eng",
+                "handler_name": "SoundHandler"
+            }
+        }
+    ],
+    "format": {
+        "filename": "test.1080p.mp4",
+        "nb_streams": 2,
+        "nb_programs": 0,
+        "format_name": "mov,mp4,m4a,3gp,3g2,mj2",
+        "format_long_name": "QuickTime / MOV",
+        "start_time": "0.000000",
+        "duration": "300.000000",
+        "size": "192000000",
+        "bit_rate": "5128000",
+        "probe_score": 100,
+        "tags": {
+            "major_brand": "isom",
+            "minor_version": "512",
+            "compatible_brands": "isomiso2avc1mp41",
+            "encoder": "Lavf58.20.100"
+        }
+    }
+}
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_mp4_metadata.json b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_mp4_metadata.json
index 9a7a4ba373..e406cc18b0 100644
--- a/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_mp4_metadata.json
+++ b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_mp4_metadata.json
@@ -95,7 +95,8 @@
             "tags": {
                 "creation_time": "2021-09-13T22:42:42.000000Z",
                 "language": "eng",
-                "handler_name": "Surround 6.1",
+                "handler_name": "SoundHandler",
+                "name": "Surround 6.1",
                 "vendor_id": "[0][0][0][0]"
             }
         },
@@ -215,7 +216,8 @@
             "tags": {
                 "creation_time": "2021-09-13T22:42:42.000000Z",
                 "language": "eng",
-                "handler_name": "SubtitleHandler"
+                "handler_name": "SubtitleHandler",
+                "name": "SDH"
             }
         },
         {
diff --git a/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_nanosecond_duration_bitrate.json b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_nanosecond_duration_bitrate.json
new file mode 100644
index 0000000000..ff8b2ca80a
--- /dev/null
+++ b/tests/Jellyfin.MediaEncoding.Tests/Test Data/Probing/video_nanosecond_duration_bitrate.json
@@ -0,0 +1,49 @@
+{
+    "streams": [
+        {
+            "index": 0,
+            "codec_name": "h264",
+            "codec_long_name": "H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10",
+            "profile": "High",
+            "codec_type": "video",
+            "codec_tag_string": "[0][0][0][0]",
+            "codec_tag": "0x0000",
+            "width": 1920,
+            "height": 1080,
+            "coded_width": 1920,
+            "coded_height": 1080,
+            "has_b_frames": 2,
+            "pix_fmt": "yuv420p",
+            "level": 40,
+            "r_frame_rate": "24/1",
+            "avg_frame_rate": "24/1",
+            "time_base": "1/1000",
+            "start_pts": 0,
+            "start_time": "0.000000",
+            "disposition": {
+                "default": 1
+            },
+            "tags": {
+                "language": "eng",
+                "BPS-eng": "",
+                "DURATION-eng": "00:01:40.000000000",
+                "NUMBER_OF_FRAMES-eng": "2400",
+                "NUMBER_OF_BYTES-eng": "10000000"
+            }
+        }
+    ],
+    "format": {
+        "filename": "video_nanosecond_duration_bitrate.mkv",
+        "nb_streams": 1,
+        "nb_programs": 0,
+        "format_name": "matroska,webm",
+        "format_long_name": "Matroska / WebM",
+        "start_time": "0.000000",
+        "duration": "100.000000",
+        "size": "10001000",
+        "probe_score": 100,
+        "tags": {
+            "encoder": "libebml v1.4.2 + libmatroska v1.6.4"
+        }
+    }
+}