VLC Streaming at 640x480 from V4L

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macleajb
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VLC Streaming at 640x480 from V4L

Postby macleajb » 15 Jan 2004 03:58

Hi Folks,

. Fedora Core 1
. 2.6.1 Kernel
. 0.7 and 0.7.1 CVS
. P4 1.5G with 640M RAM

Just your average new user. Trying to see how VLC streams. I can stream MPGs fine at 640x480. I can watch my video card using V4L. I have fairly good luck streaming v4l at 320x240, although sometimes even it seems to hang. Example command line :

vlc -vvvv 4l:/dev/video0:norm=ntsc:size=320x240:channel=0:adev=/dev/dsp:audio=0 --sout '#transcode{vcodec=mp4v,vb=1024,scale=1,acodec=mpga,ab=192,channels=2}:duplicate{dst=display,dst=standard{access=http,mux=ts,url=10.227.7.66:8090}}'

But no way am I able to get a stream to run at 640x480. I am _guessing_ that if v4l send to the display ok, and transcode streams ok, there must be something between the 2 that is hanging/stalling? I see logs of things like :

[00000218] main audio output warning: PTS is out of range (603393), dropping buffer
[00000218] main audio output warning: PTS is out of range (589024), dropping buffer
[00000217] main video output warning: late picture skipped (294333)

And the ones that ffmpeg is too many frames behind.

But never see a picture :(. Tried changing bitrates, encoders, etc...

I was certain I had this running on an earlier release and under one of the linux 2.4.x kernels, but I might have been dreaming ;(.

I started looking at the v4l code, just greping around and peeking at what's happening, but of course got lost pretty fast :).

Just wondering if anyone might offer some suggestions on where to look, or what I might try?

thnxs,
JES

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