ffmpeg: Combine/merge multiple mp4 videos not working, output only contains the first video

Question

Here is the command I am using to combine multiple videos:

ffmpeg -i 75_540_38HQ2.mp4 -i 76_70_20.mp4 -i 76_173_80.mp4 -i 81_186_35.mp4 -vcodec copy -acodec copy M         


        

Answer 1

From the ffmpeg man page "Examples" section:

You can put many streams of the same type in the output:

ffmpeg -i test1.avi -i test2.avi -vcodec copy -acodec copy \
       -vcodec copy -acodec copy test12.avi -newvideo -newaudio

In addition to the first video and audio streams, the resulting output file test12.avi will contain the second video and the second audio stream found in the input streams list.

The "-newvideo", "-newaudio" and "-newsubtitle" options have to be specified immediately after the name of the output file to which you want to add them.

If you meant you want to concatenate them, the FAQ has instructions.

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