I have several MP4 files which use the exact same video and audio codecs and settings that I want to join together into one, without re-encoding them.
When I tried YAMB, no matter if I choose "Creation -> Click to create an MP4 file with multiple video, audio, subtitle, and chapter streams" or "Editing -> Click to join supported files" the results were the same. A single short video that had multiple video and audio streams.
Then I tried Mp4Box GUI, and while it did create one long video steam, the audio streams were still multiple separate steams instead of one long stream like the video.
Is there any easy way to do this without re-encoding?
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Also an example of batch file
==== @echo on ffmpeg -y -i "Video_1.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "Video_1.ts" pause ffmpeg -y -i "Video_2.mp4" -c copy -bsf:v h264_mp4toannexb -f mpegts "Video_2.ts" pause ffmpeg -y -i concat:"Video_1.ts|Video_2.ts" -bsf:a aac_adtstoasc -c copy -f mp4 "Video_full.mp4" pause :fin ====
Are you willing to try a commercial product? I don't edit MP4 files, but VideoReDo TV Suite Plus should be able to do what you want. You can get a trial version for free and see if you like it. Trying to do this kind of thing through free programs just sucks in my opinion.