Pix_fmt error setting parameter for value -1: Spend mp4 video with ffmpeg

I drank the mp4 file and always got the pix_fmt error setting parameter for -1.

I tried to set the -pix_fmt option in front of the '-i inputfile', since the output of ffmpeg I found the message: unspecified pixel format, but it seems that it does not work

The output of ffmpeg is here: http://pastebin.com/8hNdLeQ2

By the way, the ffmpeg version I used is the last of git repo

And mp4 video from sumsung tablet.

The command I use is: $ cat b2.mp4 | ./ffmpeg -i pipe: 0 -c: copy a.mp4

I also tried:

Video: https://www.dropbox.com/s/oz0e51ggkbpgj0f/b2.mp4

Anyone can tell me how to transfer this mp4 video, thanks,

Lewis

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Source: https://habr.com/ru/post/1200288/


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