Audio and Video are desynchronized with --export clip-sequence

[eromawyn]

Bug description

I tried to exports "clips" from rush files ... but the audio and video are desynchronized. The audio was correctly cut, but the video was desynchronized. Does auto-editor take care of the audio shift my original file has ??

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'facecam.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf60.10.100
Duration: 00:18:25.50, start: 0.529000, bitrate: 172699 kb/s
Stream #0:0[0x1]: Video: mjpeg (Baseline) (jpeg / 0x6765706A), yuvj420p(pc, bt470bg/unknown/unknown), 3840x2160 [SAR 1:1 DAR 16:9], 172017 kb/s, 59.98 fps, 60 tbr, 10000k tbn (default)
Metadata:
handler_name : VideoHandler
vendor_id : FFMP
Stream #0:1[0x2]: Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]

What's your platform?

OS: Windows 10 amd64
Python: 3.12.5
PyAV: 12.3.0 (GPL version 3 or later)
Auto-Editor: 25.1.0

What command did you use

auto-editor.exe facecam.mov --export  clip-sequence

What properties does your input video have?

facecam.mov:

• recommendedTimebase: 2999/50
• video:
  • track 0:
    • codec: mjpeg
    • fps: 1776792190/29621829
    • resolution: 3840x2160
    • aspect ratio: 16:9
    • pixel aspect ratio: 1
    • duration: 1104.9217516
    • pix fmt: yuvj420p
    • color range: 2 (pc)
    • color space: 5
    • timebase: 1/10000000
    • bitrate: 172017236
• audio:
  • track 0:
    • codec: pcm_s16le
    • layout: mono
    • samplerate: 48000
    • duration: 1105.5
    • bitrate: 768000
• container:
  • duration: 1105.5
  • bitrate: 172699260

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'facecam.mov':
Metadata:
major_brand : qt
minor_version : 512
compatible_brands: qt
encoder : Lavf60.10.100
Duration: 00:18:25.50, start: 0.529000, bitrate: 172699 kb/s
Stream #0:0[0x1]: Video: mjpeg (Baseline) (jpeg / 0x6765706A), yuvj420p(pc, bt470bg/unknown/unknown), 3840x2160 [SAR 1:1 DAR 16:9], 172017 kb/s, 59.98 fps, 60
tbr, 10000k tbn (default)
Metadata:
handler_name : VideoHandler
vendor_id : FFMP
Stream #0:1[0x2]: Audio: pcm_s16le (sowt / 0x74776F73), 48000 Hz, mono, s16, 768 kb/s (default)
Metadata:
handler_name : SoundHandler
vendor_id : [0][0][0][0]

Comments

No response

[WyattBlue]

Does this only happen with --export clip-sequence?

[Cfomodz]

Remux your input file with FFmpeg to reset the start timestamp before processing with Auto-Editor:

ffmpeg -i input.mov -c copy -avoid_negative_ts make_zero output.mov
auto-editor output.mov --export clip-sequence

This command copies all streams without re-encoding while normalizing the timestamp to zero, preventing desynchronization during clip export.