[FFmpeg-devel] mp4 format pre definde mov atom

Dan Shamir dan at idomoo.com
Thu Jun 30 16:00:15 CEST 2016

hi all
i am creating a fragmented mp4

ffmpeg -y  -i input  -vcodec nvenc -preset hp -pix_fmt nv12 -g 50 -f mp4
 -movflags  empty_moov+frag_keyframe  out.mp4

and using jwplayer to view this files
the problem is i want to view the files when i encode it real-time
and jwplayer does not refresh the feed

it it loads the  mp4 , but just the parts that are ready and does not
refresh the player each x secs to see new length of mp4

is there a way to add a fake duration on the mp4 track so you can tell it
in advance the duration of the video?


Dan shamir
Director of Graphic Technology

*dan at idomoo.com <dan at idomoo.com>*

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