Hi Sander, On Fri, 2007-10-05 at 03:21 +0200, Sander Sweers wrote: > On 10/5/07, Stephan Fabel <[EMAIL PROTECTED]> wrote: > > I'm having a problem using a WinTV-PVR 150. MPEG-2 playback is working > > using VLC: pvr:// :pvr-device="/dev/video0" - however it lags badly (1-2 > > secs). > > Does it also lag if you do cat /dev/video0 > test.mpg? If not his vlc > has to be kicked to correct this.
well, it is not slow in the playback if that's what you mean. Simply counting off some seconds until I did something and comparing it showed no lag, though. I suppose it makes sense though, as I did not measure the time it took the encoder to actually write the frame vs. VLC being able to playback it. > > But for some reason I cannot grab a frame using the /dev/video32 device > > with VLC using the video4linux interface /dev/video32. I also tried > > using tvtime (adjusting the device to /dev/video32), but to no avail. > > It is raw video and the application will need to be told it is or it > will not work. I know mplayer has the option to let it know it is > capturing raw video/audio. Confirmed, using rawvideo option. However, the frames get overlayed with weird colors after the first couple of frames have been displayed. How large do the buffer sizes have to be for NTSC? > > For verification, I used VLC to display the picture in the camera. Let > > me know if another card is better suited for this purpose. If possible, > > maybe you could also name a card directly should this be the case (e.g., > > what is a good, cheap bttv878 based card?). > > In your use case a dumb grabber like a bt878 card is probably enough. > The PVR-X50 cards have an hardware mpeg encoder which reduces CPU > usage but if you are planning to converting this mpeg stream to > something like h264, xvid or theora it is a bit overkill. > > There was a similar discussion a few weeks back. Look in the archives for it. Thanks for the tip. Stephan _______________________________________________ ivtv-users mailing list [email protected] http://ivtvdriver.org/mailman/listinfo/ivtv-users
