diff options
Diffstat (limited to 'MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs')
| -rw-r--r-- | MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs | 373 |
1 files changed, 226 insertions, 147 deletions
diff --git a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs index 5de57917e..920925fc6 100644 --- a/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs +++ b/MediaBrowser.Controller/MediaEncoding/EncodingHelper.cs @@ -89,6 +89,16 @@ namespace MediaBrowser.Controller.MediaEncoding { "truehd", 6 }, }; + public static readonly string[] LosslessAudioCodecs = new string[] + { + "alac", + "ape", + "flac", + "mlp", + "truehd", + "wavpack" + }; + public EncodingHelper( IApplicationPaths appPaths, IMediaEncoder mediaEncoder, @@ -128,14 +138,10 @@ namespace MediaBrowser.Controller.MediaEncoding if (!string.IsNullOrEmpty(hwType) && encodingOptions.EnableHardwareEncoding - && codecMap.ContainsKey(hwType)) + && codecMap.TryGetValue(hwType, out var preferredEncoder) + && _mediaEncoder.SupportsEncoder(preferredEncoder)) { - var preferredEncoder = codecMap[hwType]; - - if (_mediaEncoder.SupportsEncoder(preferredEncoder)) - { - return preferredEncoder; - } + return preferredEncoder; } } @@ -551,7 +557,8 @@ namespace MediaBrowser.Controller.MediaEncoding { return Array.FindIndex(_videoProfilesH264, x => string.Equals(x, profile, StringComparison.OrdinalIgnoreCase)); } - else if (string.Equals("hevc", videoCodec, StringComparison.OrdinalIgnoreCase)) + + if (string.Equals("hevc", videoCodec, StringComparison.OrdinalIgnoreCase)) { return Array.FindIndex(_videoProfilesH265, x => string.Equals(x, profile, StringComparison.OrdinalIgnoreCase)); } @@ -620,6 +627,11 @@ namespace MediaBrowser.Controller.MediaEncoding return "flac"; } + if (string.Equals(codec, "dts", StringComparison.OrdinalIgnoreCase)) + { + return "dca"; + } + return codec.ToLowerInvariant(); } @@ -827,39 +839,38 @@ namespace MediaBrowser.Controller.MediaEncoding } var filterDevArgs = GetFilterHwDeviceArgs(VaapiAlias); + var doOclTonemap = isHwTonemapAvailable && IsOpenclFullSupported(); - if (isHwTonemapAvailable && IsOpenclFullSupported()) + if (_mediaEncoder.IsVaapiDeviceInteliHD || _mediaEncoder.IsVaapiDeviceInteli965) { - if (_mediaEncoder.IsVaapiDeviceInteliHD || _mediaEncoder.IsVaapiDeviceInteli965) + if (doOclTonemap && !isVaapiDecoder) { - if (!isVaapiDecoder) - { - args.Append(GetOpenclDeviceArgs(0, null, VaapiAlias, OpenclAlias)); - filterDevArgs = GetFilterHwDeviceArgs(OpenclAlias); - } + args.Append(GetOpenclDeviceArgs(0, null, VaapiAlias, OpenclAlias)); + filterDevArgs = GetFilterHwDeviceArgs(OpenclAlias); } - else if (_mediaEncoder.IsVaapiDeviceAmd) + } + else if (_mediaEncoder.IsVaapiDeviceAmd) + { + if (IsVulkanFullSupported() + && _mediaEncoder.IsVaapiDeviceSupportVulkanFmtModifier + && Environment.OSVersion.Version >= _minKernelVersionAmdVkFmtModifier) { - if (!IsVulkanFullSupported() - || !_mediaEncoder.IsVaapiDeviceSupportVulkanFmtModifier - || Environment.OSVersion.Version < _minKernelVersionAmdVkFmtModifier) - { - args.Append(GetOpenclDeviceArgs(0, "Advanced Micro Devices", null, OpenclAlias)); - filterDevArgs = GetFilterHwDeviceArgs(OpenclAlias); - } - else - { - // libplacebo wants an explicitly set vulkan filter device. - args.Append(GetVulkanDeviceArgs(0, null, VaapiAlias, VulkanAlias)); - filterDevArgs = GetFilterHwDeviceArgs(VulkanAlias); - } + // libplacebo wants an explicitly set vulkan filter device. + args.Append(GetVulkanDeviceArgs(0, null, VaapiAlias, VulkanAlias)); + filterDevArgs = GetFilterHwDeviceArgs(VulkanAlias); } - else + else if (doOclTonemap) { - args.Append(GetOpenclDeviceArgs(0, null, null, OpenclAlias)); + // ROCm/ROCr OpenCL runtime + args.Append(GetOpenclDeviceArgs(0, "Advanced Micro Devices", null, OpenclAlias)); filterDevArgs = GetFilterHwDeviceArgs(OpenclAlias); } } + else if (doOclTonemap) + { + args.Append(GetOpenclDeviceArgs(0, null, null, OpenclAlias)); + filterDevArgs = GetFilterHwDeviceArgs(OpenclAlias); + } args.Append(filterDevArgs); } @@ -1099,19 +1110,19 @@ namespace MediaBrowser.Controller.MediaEncoding { return "-bsf:v h264_mp4toannexb"; } - else if (IsH265(stream)) + + if (IsH265(stream)) { return "-bsf:v hevc_mp4toannexb"; } - else if (IsAAC(stream)) + + if (IsAAC(stream)) { // Convert adts header(mpegts) to asc header(mp4). return "-bsf:a aac_adtstoasc"; } - else - { - return null; - } + + return null; } public static string GetAudioBitStreamArguments(EncodingJobInfo state, string segmentContainer, string mediaSourceContainer) @@ -1189,10 +1200,8 @@ namespace MediaBrowser.Controller.MediaEncoding { return FormattableString.Invariant($" -rc_mode CBR -b:v {bitrate} -maxrate {bitrate} -bufsize {bufsize}"); } - else - { - return FormattableString.Invariant($" -rc_mode VBR -b:v {bitrate} -maxrate {bitrate} -bufsize {bufsize}"); - } + + return FormattableString.Invariant($" -rc_mode VBR -b:v {bitrate} -maxrate {bitrate} -bufsize {bufsize}"); } return FormattableString.Invariant($" -b:v {bitrate} -maxrate {bitrate} -bufsize {bufsize}"); @@ -1406,7 +1415,7 @@ namespace MediaBrowser.Controller.MediaEncoding var param = string.Empty; // Tutorials: Enable Intel GuC / HuC firmware loading for Low Power Encoding. - // https://01.org/linuxgraphics/downloads/firmware + // https://01.org/group/43/downloads/firmware // https://wiki.archlinux.org/title/intel_graphics#Enable_GuC_/_HuC_firmware_loading // Intel Low Power Encoding can save unnecessary CPU-GPU synchronization, // which will reduce overhead in performance intensive tasks such as 4k transcoding and tonemapping. @@ -2050,9 +2059,9 @@ namespace MediaBrowser.Controller.MediaEncoding } } - // Video bitrate must fall within requested value + // Audio bitrate must fall within requested value if (request.AudioBitRate.HasValue - && audioStream.BitDepth.HasValue + && audioStream.BitRate.HasValue && audioStream.BitRate.Value > request.AudioBitRate.Value) { return false; @@ -2139,7 +2148,7 @@ namespace MediaBrowser.Controller.MediaEncoding var outputScaleFactor = GetVideoBitrateScaleFactor(outputVideoCodec); // Don't scale the real bitrate lower than the requested bitrate - var scaleFactor = Math.Min(outputScaleFactor / inputScaleFactor, 1); + var scaleFactor = Math.Max(outputScaleFactor / inputScaleFactor, 1); if (bitrate <= 500000) { @@ -2161,56 +2170,96 @@ namespace MediaBrowser.Controller.MediaEncoding return Convert.ToInt32(scaleFactor * bitrate); } - public int? GetAudioBitrateParam(BaseEncodingJobOptions request, MediaStream audioStream) + public int? GetAudioBitrateParam(BaseEncodingJobOptions request, MediaStream audioStream, int? outputAudioChannels) { - return GetAudioBitrateParam(request.AudioBitRate, request.AudioCodec, audioStream); + return GetAudioBitrateParam(request.AudioBitRate, request.AudioCodec, audioStream, outputAudioChannels); } - public int? GetAudioBitrateParam(int? audioBitRate, string audioCodec, MediaStream audioStream) + public int? GetAudioBitrateParam(int? audioBitRate, string audioCodec, MediaStream audioStream, int? outputAudioChannels) { if (audioStream is null) { return null; } - if (audioBitRate.HasValue && string.IsNullOrEmpty(audioCodec)) + var inputChannels = audioStream.Channels ?? 0; + var outputChannels = outputAudioChannels ?? 0; + var bitrate = audioBitRate ?? int.MaxValue; + + if (string.IsNullOrEmpty(audioCodec) + || string.Equals(audioCodec, "aac", StringComparison.OrdinalIgnoreCase) + || string.Equals(audioCodec, "mp3", StringComparison.OrdinalIgnoreCase) + || string.Equals(audioCodec, "opus", StringComparison.OrdinalIgnoreCase) + || string.Equals(audioCodec, "vorbis", StringComparison.OrdinalIgnoreCase) + || string.Equals(audioCodec, "ac3", StringComparison.OrdinalIgnoreCase) + || string.Equals(audioCodec, "eac3", StringComparison.OrdinalIgnoreCase)) { - return Math.Min(384000, audioBitRate.Value); + return (inputChannels, outputChannels) switch + { + (>= 6, >= 6 or 0) => Math.Min(640000, bitrate), + (> 0, > 0) => Math.Min(outputChannels * 128000, bitrate), + (> 0, _) => Math.Min(inputChannels * 128000, bitrate), + (_, _) => Math.Min(384000, bitrate) + }; } - if (audioBitRate.HasValue && !string.IsNullOrEmpty(audioCodec)) + if (string.Equals(audioCodec, "dts", StringComparison.OrdinalIgnoreCase) + || string.Equals(audioCodec, "dca", StringComparison.OrdinalIgnoreCase)) { - if (string.Equals(audioCodec, "aac", StringComparison.OrdinalIgnoreCase) - || string.Equals(audioCodec, "mp3", StringComparison.OrdinalIgnoreCase) - || string.Equals(audioCodec, "opus", StringComparison.OrdinalIgnoreCase) - || string.Equals(audioCodec, "vorbis", StringComparison.OrdinalIgnoreCase) - || string.Equals(audioCodec, "ac3", StringComparison.OrdinalIgnoreCase) - || string.Equals(audioCodec, "eac3", StringComparison.OrdinalIgnoreCase)) + return (inputChannels, outputChannels) switch { - if ((audioStream.Channels ?? 0) >= 6) - { - return Math.Min(640000, audioBitRate.Value); - } + (>= 6, >= 6 or 0) => Math.Min(768000, bitrate), + (> 0, > 0) => Math.Min(outputChannels * 136000, bitrate), + (> 0, _) => Math.Min(inputChannels * 136000, bitrate), + (_, _) => Math.Min(672000, bitrate) + }; + } - return Math.Min(384000, audioBitRate.Value); - } + // Empty bitrate area is not allow on iOS + // Default audio bitrate to 128K per channel if we don't have codec specific defaults + // https://ffmpeg.org/ffmpeg-codecs.html#toc-Codec-Options + return 128000 * (outputAudioChannels ?? audioStream.Channels ?? 2); + } - if (string.Equals(audioCodec, "flac", StringComparison.OrdinalIgnoreCase) - || string.Equals(audioCodec, "alac", StringComparison.OrdinalIgnoreCase)) + public string GetAudioVbrModeParam(string encoder, int bitratePerChannel) + { + if (string.Equals(encoder, "libfdk_aac", StringComparison.OrdinalIgnoreCase)) + { + return " -vbr:a " + bitratePerChannel switch { - if ((audioStream.Channels ?? 0) >= 6) - { - return Math.Min(3584000, audioBitRate.Value); - } + < 32000 => "1", + < 48000 => "2", + < 64000 => "3", + < 96000 => "4", + _ => "5" + }; + } - return Math.Min(1536000, audioBitRate.Value); - } + if (string.Equals(encoder, "libmp3lame", StringComparison.OrdinalIgnoreCase)) + { + return " -qscale:a " + bitratePerChannel switch + { + < 48000 => "8", + < 64000 => "6", + < 88000 => "4", + < 112000 => "2", + _ => "0" + }; } - // Empty bitrate area is not allow on iOS - // Default audio bitrate to 128K if it is not being requested - // https://ffmpeg.org/ffmpeg-codecs.html#toc-Codec-Options - return 128000; + if (string.Equals(encoder, "libvorbis", StringComparison.OrdinalIgnoreCase)) + { + return " -qscale:a " + bitratePerChannel switch + { + < 40000 => "0", + < 56000 => "2", + < 80000 => "4", + < 112000 => "6", + _ => "8" + }; + } + + return null; } public string GetAudioFilterParam(EncodingJobInfo state, EncodingOptions encodingOptions) @@ -2564,8 +2613,8 @@ namespace MediaBrowser.Controller.MediaEncoding if (outputWidth > maximumWidth || outputHeight > maximumHeight) { - var scaleW = (double)maximumWidth / (double)outputWidth; - var scaleH = (double)maximumHeight / (double)outputHeight; + var scaleW = (double)maximumWidth / outputWidth; + var scaleH = (double)maximumHeight / outputHeight; var scale = Math.Min(scaleW, scaleH); outputWidth = Math.Min(maximumWidth, (int)(outputWidth * scale)); outputHeight = Math.Min(maximumHeight, (int)(outputHeight * scale)); @@ -2712,79 +2761,76 @@ namespace MediaBrowser.Controller.MediaEncoding widthParam, heightParam); } - else - { - return GetFixedSwScaleFilter(threedFormat, requestedWidth.Value, requestedHeight.Value); - } + + return GetFixedSwScaleFilter(threedFormat, requestedWidth.Value, requestedHeight.Value); } // If Max dimensions were supplied, for width selects lowest even number between input width and width req size and selects lowest even number from in width*display aspect and requested size - else if (requestedMaxWidth.HasValue && requestedMaxHeight.HasValue) + + if (requestedMaxWidth.HasValue && requestedMaxHeight.HasValue) { var maxWidthParam = requestedMaxWidth.Value.ToString(CultureInfo.InvariantCulture); var maxHeightParam = requestedMaxHeight.Value.ToString(CultureInfo.InvariantCulture); return string.Format( - CultureInfo.InvariantCulture, - "scale=trunc(min(max(iw\\,ih*a)\\,min({0}\\,{1}*a))/{2})*{2}:trunc(min(max(iw/a\\,ih)\\,min({0}/a\\,{1}))/2)*2", - maxWidthParam, - maxHeightParam, - scaleVal); + CultureInfo.InvariantCulture, + "scale=trunc(min(max(iw\\,ih*a)\\,min({0}\\,{1}*a))/{2})*{2}:trunc(min(max(iw/a\\,ih)\\,min({0}/a\\,{1}))/2)*2", + maxWidthParam, + maxHeightParam, + scaleVal); } // If a fixed width was requested - else if (requestedWidth.HasValue) + if (requestedWidth.HasValue) { if (threedFormat.HasValue) { // This method can handle 0 being passed in for the requested height return GetFixedSwScaleFilter(threedFormat, requestedWidth.Value, 0); } - else - { - var widthParam = requestedWidth.Value.ToString(CultureInfo.InvariantCulture); - return string.Format( - CultureInfo.InvariantCulture, - "scale={0}:trunc(ow/a/2)*2", - widthParam); - } + var widthParam = requestedWidth.Value.ToString(CultureInfo.InvariantCulture); + + return string.Format( + CultureInfo.InvariantCulture, + "scale={0}:trunc(ow/a/2)*2", + widthParam); } // If a fixed height was requested - else if (requestedHeight.HasValue) + if (requestedHeight.HasValue) { var heightParam = requestedHeight.Value.ToString(CultureInfo.InvariantCulture); return string.Format( - CultureInfo.InvariantCulture, - "scale=trunc(oh*a/{1})*{1}:{0}", - heightParam, - scaleVal); + CultureInfo.InvariantCulture, + "scale=trunc(oh*a/{1})*{1}:{0}", + heightParam, + scaleVal); } // If a max width was requested - else if (requestedMaxWidth.HasValue) + if (requestedMaxWidth.HasValue) { var maxWidthParam = requestedMaxWidth.Value.ToString(CultureInfo.InvariantCulture); return string.Format( - CultureInfo.InvariantCulture, - "scale=trunc(min(max(iw\\,ih*a)\\,{0})/{1})*{1}:trunc(ow/a/2)*2", - maxWidthParam, - scaleVal); + CultureInfo.InvariantCulture, + "scale=trunc(min(max(iw\\,ih*a)\\,{0})/{1})*{1}:trunc(ow/a/2)*2", + maxWidthParam, + scaleVal); } // If a max height was requested - else if (requestedMaxHeight.HasValue) + if (requestedMaxHeight.HasValue) { var maxHeightParam = requestedMaxHeight.Value.ToString(CultureInfo.InvariantCulture); return string.Format( - CultureInfo.InvariantCulture, - "scale=trunc(oh*a/{1})*{1}:min(max(iw/a\\,ih)\\,{0})", - maxHeightParam, - scaleVal); + CultureInfo.InvariantCulture, + "scale=trunc(oh*a/{1})*{1}:min(max(iw/a\\,ih)\\,{0})", + maxHeightParam, + scaleVal); } return string.Empty; @@ -2858,18 +2904,21 @@ namespace MediaBrowser.Controller.MediaEncoding "yadif_cuda={0}:-1:0", doubleRateDeint ? "1" : "0"); } - else if (hwDeintSuffix.Contains("vaapi", StringComparison.OrdinalIgnoreCase)) + + if (hwDeintSuffix.Contains("vaapi", StringComparison.OrdinalIgnoreCase)) { return string.Format( CultureInfo.InvariantCulture, "deinterlace_vaapi=rate={0}", doubleRateDeint ? "field" : "frame"); } - else if (hwDeintSuffix.Contains("qsv", StringComparison.OrdinalIgnoreCase)) + + if (hwDeintSuffix.Contains("qsv", StringComparison.OrdinalIgnoreCase)) { return "deinterlace_qsv=mode=2"; } - else if (hwDeintSuffix.Contains("videotoolbox", StringComparison.OrdinalIgnoreCase)) + + if (hwDeintSuffix.Contains("videotoolbox", StringComparison.OrdinalIgnoreCase)) { return string.Format( CultureInfo.InvariantCulture, @@ -2900,7 +2949,8 @@ namespace MediaBrowser.Controller.MediaEncoding options.VppTonemappingBrightness, options.VppTonemappingContrast); } - else if (string.Equals(hwTonemapSuffix, "vulkan", StringComparison.OrdinalIgnoreCase)) + + if (string.Equals(hwTonemapSuffix, "vulkan", StringComparison.OrdinalIgnoreCase)) { args = "libplacebo=format={1}:tonemapping={2}:color_primaries=bt709:color_trc=bt709:colorspace=bt709:peak_detect=0:upscaler=none:downscaler=none"; @@ -4214,7 +4264,8 @@ namespace MediaBrowser.Controller.MediaEncoding // sw => hw if (doVkTonemap) { - mainFilters.Add("hwupload_vaapi"); + mainFilters.Add("hwupload=derive_device=vaapi"); + mainFilters.Add("format=vaapi"); mainFilters.Add("hwmap=derive_device=vulkan"); mainFilters.Add("format=vulkan"); } @@ -4325,12 +4376,15 @@ namespace MediaBrowser.Controller.MediaEncoding // prefer vaapi hwupload to vulkan hwupload, // Mesa RADV does not support a dedicated transfer queue. - subFilters.Add("hwupload_vaapi"); + subFilters.Add("hwupload=derive_device=vaapi"); + subFilters.Add("format=vaapi"); subFilters.Add("hwmap=derive_device=vulkan"); subFilters.Add("format=vulkan"); overlayFilters.Add("overlay_vulkan=eof_action=endall:shortest=1:repeatlast=0"); - overlayFilters.Add("scale_vulkan=format=nv12"); + + // TODO: figure out why libplacebo can sync without vaSyncSurface VPP support in radeonsi. + overlayFilters.Add("libplacebo=format=nv12:apply_filmgrain=0:apply_dolbyvision=0:upscaler=none:downscaler=none:dithering=none"); // OUTPUT vaapi(nv12/bgra) surface(vram) // reverse-mapping via vaapi-vulkan interop. @@ -4772,26 +4826,27 @@ namespace MediaBrowser.Controller.MediaEncoding { return videoStream.BitDepth.Value; } - else if (string.Equals(videoStream.PixelFormat, "yuv420p", StringComparison.OrdinalIgnoreCase) - || string.Equals(videoStream.PixelFormat, "yuvj420p", StringComparison.OrdinalIgnoreCase) - || string.Equals(videoStream.PixelFormat, "yuv444p", StringComparison.OrdinalIgnoreCase)) + + if (string.Equals(videoStream.PixelFormat, "yuv420p", StringComparison.OrdinalIgnoreCase) + || string.Equals(videoStream.PixelFormat, "yuvj420p", StringComparison.OrdinalIgnoreCase) + || string.Equals(videoStream.PixelFormat, "yuv444p", StringComparison.OrdinalIgnoreCase)) { return 8; } - else if (string.Equals(videoStream.PixelFormat, "yuv420p10le", StringComparison.OrdinalIgnoreCase) - || string.Equals(videoStream.PixelFormat, "yuv444p10le", StringComparison.OrdinalIgnoreCase)) + + if (string.Equals(videoStream.PixelFormat, "yuv420p10le", StringComparison.OrdinalIgnoreCase) + || string.Equals(videoStream.PixelFormat, "yuv444p10le", StringComparison.OrdinalIgnoreCase)) { return 10; } - else if (string.Equals(videoStream.PixelFormat, "yuv420p12le", StringComparison.OrdinalIgnoreCase) - || string.Equals(videoStream.PixelFormat, "yuv444p12le", StringComparison.OrdinalIgnoreCase)) + + if (string.Equals(videoStream.PixelFormat, "yuv420p12le", StringComparison.OrdinalIgnoreCase) + || string.Equals(videoStream.PixelFormat, "yuv444p12le", StringComparison.OrdinalIgnoreCase)) { return 12; } - else - { - return 8; - } + + return 8; } return 0; @@ -5023,11 +5078,9 @@ namespace MediaBrowser.Controller.MediaEncoding return " -hwaccel cuda" + (outputHwSurface ? " -hwaccel_output_format cuda" : string.Empty) + (nvdecNoInternalCopy ? " -hwaccel_flags +unsafe_output" : string.Empty) + " -threads 1" + (isAv1 ? " -c:v av1" : string.Empty); } - else - { - // cuvid decoder doesn't have threading issue. - return " -hwaccel cuda" + (outputHwSurface ? " -hwaccel_output_format cuda" : string.Empty); - } + + // cuvid decoder doesn't have threading issue. + return " -hwaccel cuda" + (outputHwSurface ? " -hwaccel_output_format cuda" : string.Empty); } } @@ -5385,7 +5438,8 @@ namespace MediaBrowser.Controller.MediaEncoding // Automatically set thread count return mustSetThreadCount ? Math.Max(Environment.ProcessorCount - 1, 1) : 0; } - else if (threads >= Environment.ProcessorCount) + + if (threads >= Environment.ProcessorCount) { return Environment.ProcessorCount; } @@ -5670,14 +5724,22 @@ namespace MediaBrowser.Controller.MediaEncoding } var inputChannels = audioStream is null ? 6 : audioStream.Channels ?? 6; + var shiftAudioCodecs = new List<string>(); if (inputChannels >= 6) { - return; + // DTS and TrueHD are not supported by HLS + // Keep them in the supported codecs list, but shift them to the end of the list so that if transcoding happens, another codec is used + shiftAudioCodecs.Add("dca"); + shiftAudioCodecs.Add("truehd"); + } + else + { + // Transcoding to 2ch ac3 or eac3 almost always causes a playback failure + // Keep them in the supported codecs list, but shift them to the end of the list so that if transcoding happens, another codec is used + shiftAudioCodecs.Add("ac3"); + shiftAudioCodecs.Add("eac3"); } - // Transcoding to 2ch ac3 almost always causes a playback failure - // Keep it in the supported codecs list, but shift it to the end of the list so that if transcoding happens, another codec is used - var shiftAudioCodecs = new[] { "ac3", "eac3" }; if (audioCodecs.All(i => shiftAudioCodecs.Contains(i, StringComparison.OrdinalIgnoreCase))) { return; @@ -5919,10 +5981,17 @@ namespace MediaBrowser.Controller.MediaEncoding } var bitrate = state.OutputAudioBitrate; - - if (bitrate.HasValue) + if (bitrate.HasValue && !LosslessAudioCodecs.Contains(codec, StringComparison.OrdinalIgnoreCase)) { - args += " -ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture); + var vbrParam = GetAudioVbrModeParam(codec, bitrate.Value / (channels ?? 2)); + if (encodingOptions.EnableAudioVbr && vbrParam is not null) + { + args += vbrParam; + } + else + { + args += " -ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture); + } } if (state.OutputAudioSampleRate.HasValue) @@ -5940,23 +6009,33 @@ namespace MediaBrowser.Controller.MediaEncoding var audioTranscodeParams = new List<string>(); var bitrate = state.OutputAudioBitrate; + var channels = state.OutputAudioChannels; + var outputCodec = state.OutputAudioCodec; - if (bitrate.HasValue) + if (bitrate.HasValue && !LosslessAudioCodecs.Contains(outputCodec, StringComparison.OrdinalIgnoreCase)) { - audioTranscodeParams.Add("-ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture)); + var vbrParam = GetAudioVbrModeParam(GetAudioEncoder(state), bitrate.Value / (channels ?? 2)); + if (encodingOptions.EnableAudioVbr && vbrParam is not null) + { + audioTranscodeParams.Add(vbrParam); + } + else + { + audioTranscodeParams.Add("-ab " + bitrate.Value.ToString(CultureInfo.InvariantCulture)); + } } - if (state.OutputAudioChannels.HasValue) + if (channels.HasValue) { audioTranscodeParams.Add("-ac " + state.OutputAudioChannels.Value.ToString(CultureInfo.InvariantCulture)); } - if (!string.IsNullOrEmpty(state.OutputAudioCodec)) + if (!string.IsNullOrEmpty(outputCodec)) { audioTranscodeParams.Add("-acodec " + GetAudioEncoder(state)); } - if (!string.Equals(state.OutputAudioCodec, "opus", StringComparison.OrdinalIgnoreCase)) + if (!string.Equals(outputCodec, "opus", StringComparison.OrdinalIgnoreCase)) { // opus only supports specific sampling rates var sampleRate = state.OutputAudioSampleRate; |