[streaming] Re: v4l/webcam streaming

[Miro]

The problem seems to exist also with mp4live:

http://mpeg4ip.sourceforge.net/documentation/index.php?readme=mp4live
====
The default is to assume that the video driver is going to capture close to the correct frame rate of 29.97 for NTSC, 25 for PAL. If you don't think that this is working quite right, try the "videoTimestampCache=0" to the .mp4live_rc before you start. (This may be the case with usb web cams, but most likely not regular capture cards). Note: this is for v4l users only.
====


On Sat, Dec 18, 2004 at 03:20:38PM +0100, Miro wrote:
> Hello,
> 
> I've started to test a v4l/webcam solution to stream video
> on lan. But when I start vls, there's a problem with timestamp:
> 
> VideoLAN Server 0.5.5-cvs (Dec 16 2004) - (c) 1999-2003 VideoLAN
> Info : Found V4L device Creative Webcam NX ULTRA
> 
>        1 channel(s)
> 160x120->640x480
> Info : Changing to channel 0 (SPCA505)
> Info : Found V4L window 640x480
> Info : Encoding video : 640x480 25 fps at 500 kb/s in mpeg4
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]Error, Invalid timestamp=0, last=0
> [mpeg4 @ 0xb7f54008]get_buffer() failed (stride changed)
> 
> 
> The problem occurs also with mpeg1video compression.
> Does the problem come from the webcam driver (spca505),
> v4l or vls?
> 
> Thanks
> Miro
> 
> 
> -- 
> "Ne pas grandir trop vite, mais comme un arbre."
> 
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-- 
"Ne pas grandir trop vite, mais comme un arbre."

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