Before I left, I was wrestling with the issue of DVD chapters. I had modified mpeg2enc so that the -S option took the name of a file that contained a list of frames at which to start chapters. But I couldn't get it working right; if I used the unmodified mplex (i.e. with the -M flag forced on), I'd get one big video with no chapters, and if I used my modified mplex (i.e. the the -M flag forced off), I'd get a separate video file for each chapter, but my DVD player would hiccup between chapters. (My brother's DVD player didn't just hiccup, it paused for a second or more! So it's official, I screwed something up. Not that any of you needed to be told that. :-)
I now think I know what the problem is, but I have to do a bit of coding to test it out. I'm thinking it's because the -S option of mpeg2enc and the -S option of mplex actually do very different things. "mpeg2enc -S" creates sequence-end markers in the video stream, which mplex uses to make separate video files, and "mplex -S" will create separate files too, but using a completely different technique. I'm guessing that what I really should have done is modify mplex's -S option to react to frame numbers, instead of mpeg2enc's -S option. What do the experts think? (Don't worry, I'll do the coding, I just wanted to bounce the concept off of you. Also, I've been thinking about how to do that change cleanly, and think I've got it, so the next version you see won't be a complete hack.) On another topic, Dan Scholnik asked if anyone else is seeing color-shifting in their yuvdenoise output. No, but I *am* seeing complete loss of color near the edges between moving parts & non-moving parts. Andrew, I'm pretty sure the 5-second video clip I sent you shows that problem, near the top part of the guitarist's hand. Finally, I have a question about encoding hardware....right now I have a Pinnacle PCTV, which is basically just a Bt878 with an S-Video input. Now that I'm doing more DVDs, I'm planning to upgrade to either an LML-33 or a Canopus ADVC-100. The LML-33 allows for raw-video capture, which is comforting for a purist like me, but I figure I'll still get "queueing frame twice" messages from streamer. The Canopus ADVC-100, being an analog-to-DV converter, apparently bypasses the problem completely, but I wonder if converting to DV is going to remove much of the fine details that the denoiser would have preferred to see. Does anyone here have experience with both styles of video capturing? Thanks to all for your insights. I have to move, to a different town even, and so I'll be pretty flaky for the next month or so, but after that, I plan to resume spending a lot of time on digital video issues. Steven Boswell [EMAIL PROTECTED] ------------------------------------------------------- This SF.NET email is sponsored by: SourceForge Enterprise Edition + IBM + LinuxWorld = Something 2 See! http://www.vasoftware.com _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
