using ffmpeg to convert gif to mp4 , output doesn't play on android -

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i use following command convert gif file mp4 resulting mp4 file doesn't play in android default video player .
did wrong ?
there aditional steps should take produce android playable mp4 files ?

$ ffmpeg -f gif -i infile.gif outfile.mp4

my test gif file : test gif file
desktop played output.mp4 using vlc media player , mx player on android device played video file without error.


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