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twitter ffmpeg
ffmpeg -i test.mov -vcodec libx264 -vf 'scale=640:trunc(ow/a/2)*2' -acodec aac -vb 1024k -minrate 1024k -maxrate 1024k -bufsize 1024k -ar 44100 -strict experimental -r 30 out.mp4
@RichardBronosky
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RichardBronosky commented Jul 5, 2018

If all you need to do is convert to mp4, this leaves everything else unchanged.

ffmpeg -i in.mov -c copy out.mp4

@brandonprry
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brandonprry commented Oct 1, 2019

Foone's command works for me.

@galaxy001
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galaxy001 commented Oct 20, 2019

-t 2:20 is also needed.

@hertzsprung
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hertzsprung commented Mar 30, 2020

It's also necessary to round to an even number of pixel dimensions:

ffmpeg -i test.mov -vcodec libx264 -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -pix_fmt yuv420p -strict experimental -r 30 -t 2:20 -acodec aac -vb 1024k -minrate 1024k -maxrate 1024k -bufsize 1024k -ar 44100 -ac 2 out.mp4

@Pomax
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Pomax commented Oct 27, 2020

Also, based on Twitter's JSON response, the aspect ratio can only be 3:1 max

@nhed
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nhed commented Jul 3, 2021

I definitely needed a -t as I was trying to send a 5 second video (using the standard UI) and the screen error was generic ... had to examine the JSON in the response to know they thought it was too short.

@tinevez
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tinevez commented Jan 5, 2022

@Pomax remark fixed my issue. The aspect ratio was the problem in my case but nothing tells it is the case.

@olleharstedt
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olleharstedt commented May 11, 2022

@hertzsprung This one worked for me

@warp16
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warp16 commented Jul 31, 2022

@hertzsprung thank you, your command worked for a troublesome DVD rip.

@DangerBlack
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DangerBlack commented Sep 2, 2022

@hertzsprung This one worked for me

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