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FFmpeg 8.0

(ffmpeg.org)
985 points gyan | 1 comments | 22 Aug 25 15:22 UTC | HN request time: 0.209s | source
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Dwedit ◴[22 Aug 25 16:17 UTC] No.44986381[source]▶
Has anyone made a good GUI frontend for accessing the various features of FFMPEG? Sometimes you just want to remux a video without doing any transcoding, or join several video and audio streams together (same codecs).
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1. neRok ◴[22 Aug 25 23:48 UTC] No.44991369[source]▶
Joining videos together sounds easy, but there's tons of ways it can go wrong! You've got time bases to consider, start offsets, frame/overscan crops, fps differences (constant vs variable), etc. And even though your videos might both be h264, one might be encoded with B frames and open GOP, and the other not, and that might cause playback issues in certain circumstances. Similarly, both could be AAC audio, but one is 48kHz sample rate, the other 44.1kHz.

Someone else mentioned Lossless-Cut program, which is pretty good. It has a merge feature that has a compatibility checker ability that can detect a few issues. But I find transcoding the separate videos to MPEG-TS before joining them can get around many problems. If you fire up a RAM-Disk, it's a fast task.

  ffmpeg -i video1.mp4 -c copy -start_at_zero -fflags +genpts R:\video1.ts;
  ffmpeg -i video2.mp4 -c copy -start_at_zero -fflags +genpts R:\video2.ts;
  ffmpeg -i "concat:R:\video1.ts|R:\video2.ts" -c copy -movflags +faststart R:\merged.mp4