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Downsample to the closest divisor standard framerate

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Rigel Kent 2020-01-14 23:34:03 +01:00 • committed by Chocobozzz
parent 0539dba824
commit 06bcfbd9f7
6 changed files with 23 additions and 9 deletions
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11
server/helpers/ffmpeg-utils.ts
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@ -286,13 +286,16 @@ export {
async function buildx264Command (command: ffmpeg.FfmpegCommand, options: TranscodeOptions) {
let fps = await getVideoFileFPS(options.inputPath)
// On small/medium resolutions, limit FPS
if (
// On small/medium resolutions, limit FPS
options.resolution !== undefined &&
options.resolution < VIDEO_TRANSCODING_FPS.KEEP_ORIGIN_FPS_RESOLUTION_MIN &&
fps > VIDEO_TRANSCODING_FPS.AVERAGE
fps > VIDEO_TRANSCODING_FPS.AVERAGE ||
// If the video is doesn't match had standard
!VIDEO_TRANSCODING_FPS.HD_STANDARD.map(value => fps % value).includes(0)
) {
fps = VIDEO_TRANSCODING_FPS.AVERAGE
// Get closest standard framerate by modulo: downsampling has to be done to a divisor of the nominal fps value
fps = VIDEO_TRANSCODING_FPS.STANDARD.sort((a, b) => fps % a - fps % b)[0]
}
command = await presetH264(command, options.inputPath, options.resolution, fps)
@ -305,7 +308,7 @@ async function buildx264Command (command: ffmpeg.FfmpegCommand, options: Transco
if (fps) {
// Hard FPS limits
if (fps > VIDEO_TRANSCODING_FPS.MAX) fps = VIDEO_TRANSCODING_FPS.MAX
if (fps > VIDEO_TRANSCODING_FPS.MAX) fps = VIDEO_TRANSCODING_FPS.HD_STANDARD.sort((a, b) => fps % a - fps % b)[0]
else if (fps < VIDEO_TRANSCODING_FPS.MIN) fps = VIDEO_TRANSCODING_FPS.MIN
command = command.withFPS(fps)