I was concerned about same frame size, udio and video codec to concat That first sample video mentioned in my question frame rate was 12, while 2nd video frame rate was 25 and that's what make the sync Now, i have set frame rate 25 to those two video -r 25 and it's works like charms : below is the full conversion code: ffmpeg exe -i "f:\1.avi" -r 25 -af apad -vf scale=1280:720 -crf 15.0 -vcodec libx264 -acodec aac -ar 48000 -b:a 192k -coder 1 -rc lookahead 60 -threads 0 -shortest -avoid negative ts make zero -fflags genpts 01.mp4 hope it may help some one like me in near future. So, i post it as answer here so that someone else may can get help. , FFMPEG -F Concat Video, Audio Sync Issue Some one else on another forum helped me to find the issue.
questions/35416110/ffmpeg-concat-video-and-audio-out-of-sync /questions/35416110/ffmpeg-concat-video-and-audio-out-of-sync?noredirect=1 /questions/35416110/ffmpeg-concat-video-and-audio-out-of-sync/35520705 FFmpeg 18.7 QuickTime File Format 13.7 Text file 6.5 Computer file 4.8 MPEG-4 Part 14 3.6 Synchronization 3.2 Input/output 2.9 Video 2.9 Stack Overflow 2.6 MPEG transport stream 2.5 Concatenation 2.4 Memory segmentation 2.3 0 2.2 Timestamp 2 Copy (command) 2 Process (computing) 1.8 Matroska 1.7 QuickTime 1.7 Futures and promises 1.6 File synchronization 1.6įFMPEG -F Concat Video, Audio Sync Issue /questions/40860443/ffmpeg-f-concat-video-audio-sync-issue FFmpeg concat video and audio out of sync /q/35416110įmpeg concat video and audio out of sync This two step process should work Step 1 Pad out the udio udio Or Generate segments with synced streams ffmpeg -y -ss 00:00:02.750 -i input.MOV -c copy -t 00:00:05.880 -avoid negative ts make zero -fflags genpts segment.MOV Step 2 Concat ffmpeg -f concat B > -i segments.txt -c copy test.mov where segments.txt consists of the names of the padded files.
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