Hallo >>> I use yuvscaler to black out the borders of my video. Here's the syntax >>> I use: >>> yuvscaler -v 0 -I ACTIVE_700x560+8+8 | y4mshift -n 2 | mpeg2enc -v 0 -K >>> tmpgenc -r 32 -4 1 -2 1 -D 10 -E 10 -g 15 -G 15 -q 6 -b 9400 -f 8 -o $1 >>> >>> I've noticed the "inactive" border isn't black. It's grey. OK, it's not >>> quite noticeable unless the active part of the video is black. >>> >>> Is that normal? >> What version of the mjpegtools do you use ? > > I use : > yuvscaler 1.9.0 (15-02-2004) > mpeg2enc version 1.9.0 (3.0.0-beta1) > >> What color does the area have ? > > It's not black. It's almost black, but it's a bit lighter. I have taken a stream recorded by the mjpegtools, encdoed with mpeg2enc, and set the active area with yuvscaler. When I decode the stream with mplayer to jpeg files. The area I have set to black is R,G,B=0,0,0.
>> What color does the "black video" you mention have ? > Total black. RGB 000. It's an YUV4MPEG stream made by Cinelerra. So when you set a active are like 100x100+100+100, you have two different colors ? What color do you get when you convert mpeg to jpeg/tiff ? Do you get a different color when you don't use y4mscaler ? Could you post 2 jpeg's of that test (on black encoded, and the other with y4mscaler). >> I have just taken a look in the cvs version of yuvscaler, and there the >> color is set correct to Y=16 and U=V=128. > > OK. In fact, I noticed the problem when I increased the brightness of my > video with mplayer. > Here's what I usually see : > http://www.europephoto.com/info/output_normal_brightness.png > > And here's the SAME image with brightness increased: > http://www.europephoto.com/info/output_high_brightness.png > You can see the border, which isn't the same color than the other part > of the video (which is real black normally) That lookes strange. What output driver did you use and what program to capture the output ? auf hoffentlich bald, Berni the Chaos of Woodquarter Email: [EMAIL PROTECTED] www: http://www.lysator.liu.se/~gz/bernhard _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
