[MPlayer-users] udp multicast quick start

[Reimar Döffinger]

On Sat, Sep 03, 2011 at 04:14:19PM +0530, Mac Smith wrote:
> 
> On 03-Sep-2011, at 4:01 PM, Reimar Döffinger wrote:
> 
> > On Sat, Sep 03, 2011 at 03:49:21PM +0530, Mac Smith wrote:
> >> I am playing a udp multicast stream (mpeg2 transport stream) using the following command
> >> 
> >> mplayer -vo vdpau -vc ffmpeg12vdpau udp://239.1.1.1:1234
> >> 
> >> 
> >> It plays well but when it starts, it waits for 4-5 seconds after a message  "TS file format detected." I googled and found that adding a "-demuxer" option would solve the problem, so i added "-demuxer +mpegts", it improved only by 0.5 seconds, if i add "-demuxer mpeges" than its a very very quick start but the video is very very bad. 
> >> 
> >> It looks like mplayer checks something from the stream, how can i skip all this checks to do a quick play.
> > 
> > I think VDPAU can only start decoding at an I-frame, so you have to
> > reduce the I-frame interval at the encoder end.
> 
> even if I user -vo xv it takes the same time to start. And its a live stream from IPTV headend i have no control over it.

I forgot to say that specifying -demuxer reduces the delay _before_ the
"... file format detected" message, not the one after.
You could try setting -tsprobe to some lower value.
I assume you don't have a cache enabled (-nocache)?
What is the bitrate of the stream?