[MPlayer-users] Re: Improved RTSP/RTP streaming support

[D Richard Felker III]

On Wed, Mar 12, 2003 at 06:05:22PM -0800, Ross Finlayson wrote:
> [Automatic answer: RTFM (read DOCS, FAQ), also read DOCS/bugreports.html]
> 
> >> - In most cases you no longer need to use the "-fps" option to set the
> >> video frame rate.  Instead, the MPlayer code will try to figure out the
> >> frame rate automatically, by comparing the RTP presentation times of
> >> successive packets.
> >
> >Eh? If packets have presentation times, you should just use those
> 
> I do.
> 
> >MPlayer can handle variable-framerate
> >streams where it just has a timestamp for each packet rather than a
> >fixed framerate.
> 
> I wish MPlayer worked that way, but unfortunately it doesn't.  For MPEG-4 
> (or H.261, H.263, or motion-JPEG) video streams, MPlayer would complain, 
> and not play video at all, if the user did not use the "-fps" option.  My 
> code now overcomes this by looking at (and buffering) incoming packets 
> until it is able to figure out the frame rate; then it sets 
> "sh_video->fps", and from then on the rest of MPlayer is happy.

Well then your demuxer code is probably broken, because variable fps
works fine with asf files and quicktime files.

Rich