![]() There is the ffprobe of the two files : libavutil 55. So in my last attempt i tried to change the fps rate of my files like this : ffmpeg -y -i source.mp4 -r FPS -s RESOLUTION -c:v libx264 -b:v 3M -strict -2 -movflags faststart destination.mp4īut the result reduces the quality too much. ![]() The merge occur without any errors but the audio is still unsynch I loose the audio on the 60 FPS files, at this point i thought it was an audio problem so i tried to "unify" the audio codec of all mp4 files like this : ffmpeg -i input.mp4 -acodec SOME_AUDIO_TYPE -vcodec copy out.mp4 When trying the "mp4 to mpg then merge" : ffmpeg -i 1.mp4 -qscale 0 1.mpgĬat 1.mpg 2.mpg | ffmpeg -f mpeg -i -qscale 0 -vcodec mpeg4 output.mp4 The audio and video aren't synch anymore and the video sometimes freezes. When trying this method : :: Create File Listįfmpeg -f concat -i mylist.txt -c copy output.mp4 To merge the files i have been using all the solutions in this post I tried to modify the frame rate of the videos (30 to 60 or 60 to 30), but it reduces the quality too much. ![]() ![]() Most of the time the audio is not in sync with the video. When I merge the files, there always seems to be a problem with the output. I have been trying to merge some mp4 files with different frame rates without success. ![]()
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