Check that duration hasn’t changed:
ffprobe -v error -show_entries format=duration -of default=noprint_wrappers=1:nokey=1 jur153_full_converted.mp4
| Problem | Solution |
|---------|----------|
| Subtitles out of sync after 20 min | Use convert020006 as a linear offset via Subtitle Edit |
| Conversion stops at 020006 seconds | Check for corrupted frames near that timestamp with -err_detect flag |
| “Full” conversion outputs truncated file | Add -t duration flag matching original length |
| English subs not showing | Remux with -c:s mov_text for MP4 compatibility | jur153engsub convert020006 min full
Sometimes subtitles drift because of 23.976 vs 24 fps. Use: Check that duration hasn’t changed: ffprobe -v error
ffmpeg -i jur153engsub.mkv -filter_complex "[0:v]setpts=PTS*1.001[v]" -map "[v]" -map 0:a -c copy output_fixed.mkv
To get clean English audio for subtitling: | Problem | Solution | |---------|----------| | Subtitles
ffmpeg -i jur153engsub.mkv -vn -acodec pcm_s16le -ar 16000 audio_clean.wav