(ffmpeg) B-adapt 1 and B-frames 16 (#774)

diff --git a/server/helpers/ffmpeg-utils.ts b/server/helpers/ffmpeg-utils.ts
index 4086335d7b31465110ef06debb1a25154367a3b0..f0623c88bd25cb82e9ed3b98adb4e79161e82c5b 100644 (file)
--- a/server/helpers/ffmpeg-utils.ts
+++ b/server/helpers/ffmpeg-utils.ts
@@ -88,6 +88,8 @@ function transcode (options: TranscodeOptions) {
                     .videoCodec('libx264')
                     .outputOption('-threads ' + CONFIG.TRANSCODING.THREADS)
                     .outputOption('-movflags faststart')
+                    .outputOption('-b_strategy 1') // NOTE: b-strategy 1 - heuristic algorythm, 16 is optimal B-frames for it
+                    .outputOption('-bf 16') // NOTE: Why 16: https://github.com/Chocobozzz/PeerTube/pull/774. b-strategy 2 -> B-frames<16
                     // .outputOption('-crf 18')
 
     let fps = await getVideoFileFPS(options.inputPath)