On Thu, 30 Dec 2004, Steven Boswell II wrote: > could find at Best Buy that day, cost US$60. Note > that I'm using a composite-video cable, even > though my VCR can put out an S-VHS signal. The > issue here is who does the color separation. If I > play a VHS tape and use an S-VHS cable to carry it > from the VCR, then the VCR is doing color > separation. My Canopus ADVC-300 box has
Not so! The format used on VHS and SVHS tapes has luma and chroma recorded separately. If you use the S-video connector, your VCR isn't doing color separation as the signals are already separate. When you use the composite output, your VCR is actually combining the signals and then they are getting re-separated by the canopus. Of course, if your tape's original source was broadcast TV, then the VCR did do color separation. It was done when you recorded composite TV signal. I suppose that if the original tape was made on a VCR with poor Y-C separation, that re-combining the signals on playback and then re-separating them in the canopus might give you better quality. > "raw2yuv -i 2" generates raw YUV data from DV > data, but with a 4:1:1 color scheme instead of > 4:2:0. In English, that means the color plane is > 720x480 instead of 360x240, like it needs to be I think you've got a typo there, 4:1:1 would be 180x480. 720x480 would be called 4:4:4. DV-NTSC is 4:1:1 and DV-PAL is 4:2:0, DVD and ATSC use 4:2:0, and D1 is 4:2:2. ------------------------------------------------------- The SF.Net email is sponsored by: Beat the post-holiday blues Get a FREE limited edition SourceForge.net t-shirt from ThinkGeek. It's fun and FREE -- well, almost....http://www.thinkgeek.com/sfshirt _______________________________________________ Mjpeg-users mailing list Mjpeg-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mjpeg-users
