[libav-api] problem with RTP and real time

Luca Barbato lu_zero at gentoo.org
Wed May 18 11:22:26 CEST 2011

On 5/18/11 11:07 AM, Irwin Lourtet wrote:
> Hello,
> I am developping a program which allows to send a mpeg-ts over rtp stream. I
> would like to know if libav has an option to send packet over rtp at the time
> it must be displayed. Because now I read packet and I send them when they are
> ready, for example I send a  55s video in 30s. So I would like to send this
> video in 55s. If I am not enough clear I would be please to give you more
> details.

the -re option implemented in ffmpeg.c should give you guidance in this 
regard I guess.

> I have got another problem which I think is linked with the previous one. I
> send the video over rtp with my program based on libav, and I receive the
> video with vlc. So my problem is when I send the video in 320*240 there is no
> problem, but more the resolution increase, less I can receive with vlc. For
> example when I take the higher resolution of my video ( 1920*1080) I could
> only see one frame, and if I want to see other one I have to stop and play
> again vlc. It is really strange.

first try to model those stuff with a script using the ffmpeg command 
and then try to report in code what is the expected result.

I hope that helps a little


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