Yeah, Markus, you got it. And it is a fault of pixel format. My sweet tv card produced UYVY data, but I took it as YUYV, this just produce the same effect with losing one byte in video data process.so I got that bad effect. When I modified the pixel format when mplayer VIDIOC_G_FMT and VIDIOC_S_FMT, I got the right image now. Thank you for your help and advice. :-) :-) On Nov 28, 2007 8:48 PM, Markus Rechberger <mrechberger@xxxxxxxxx> wrote: > > On 11/28/07, kevin liu <lwtbenben@xxxxxxxxx> wrote: > > Dear, > > /****** I attached one of my video frame, please help me to > > examine it. **************/ > > I am testing my sweet tv card on my Ubuntu with self-developed > > driver, until yesterday, I got some bad effect video frame. > > It seems that the video data correctly received and correctly copied > > to buffer outqueue because I could watch the tv program > > with a bad effect. > > But I wonder why mplayer gives video frame a green background. > > Anyone has met the same problem, give me some advice please, thank you. > > > > could also be a bad reception and that the video is shifted by 1 or 2 > bytes to the wrong direction, maybe you forgot to strip of the headers > of your frame (just a guess though) > RGB would look differently. > YUYV uses 4 bytes for 2 pixels, RGB 3 bytes for 1 pixel (so the video > would very likely be bigger). > It seems like that you're displaying the whole videocontent already so > have a closer look at stripping off a few bytes. > > Markus > _______________________________________________ linux-dvb mailing list linux-dvb@xxxxxxxxxxx http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
