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Do not transcode to an higher bitrate

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Thanks bkil https://github.com/bkil
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Chocobozzz 2020-11-20 15:06:56 +01:00
parent da2516fde1
commit d218e7de94
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5 changed files with 59 additions and 3 deletions
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7
server/helpers/ffmpeg-utils.ts
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@ -674,7 +674,12 @@ async function presetH264 (command: ffmpeg.FfmpegCommand, input: string, resolut
// Constrained Encoding (VBV)
// https://slhck.info/video/2017/03/01/rate-control.html
// https://trac.ffmpeg.org/wiki/Limiting%20the%20output%20bitrate
const targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
let targetBitrate = getTargetBitrate(resolution, fps, VIDEO_TRANSCODING_FPS)
// Don't transcode to an higher bitrate than the original file
const fileBitrate = await getVideoFileBitrate(input)
targetBitrate = Math.min(targetBitrate, fileBitrate)
localCommand = localCommand.outputOptions([ `-maxrate ${targetBitrate}`, `-bufsize ${targetBitrate * 2}` ])
// Keyframe interval of 2 seconds for faster seeking and resolution switching.