Hi Everyone, I have created 5 half hour DVDs with Cinelerra and they look beautiful. Except for one thing: the video pauses or stutters (replays the last few frames) at some of the chapter boundaries.
In Cinelerra, I insert labels to mark my chapters. Shows typically have 5 or 6 chapters, and the chapters allows me to tweak and re-render my introduction or credits without re-rendering the whole show. Next I mplex together the AC3s and M2Vs into MPGs, and then use Q-DVDAuthor to build the DVD filesystem. It's in the DVD filesystem that the flaws appear. I tried moving the labels and used different muxers, but I always get the same flaws in the same places. Not between all chapters, though. Different players show the flaws differently: vlc freezes the frame while the audio plays, totem and xine stutter the video, and my Sony DVD player freezes both the audio and video. Duration is about 1/3 second. Unfortunately mplayer, which provides the most verbose output, shows no flaw at all! Bitrate: I use mplex 1.8.0 and 1.9.0 with no options, and I believe the bitrate is near 10 Mbps. I also tried ffmpeg with it's "ntsc-dvd" setting, and it produced a bitrate of about 6.6 Mbps. Same result from each. This e-mail: http://sourceforge.net/mailarchive/[EMAIL PROTECTED]&forum_name=dvdauthor-users was the closest thing I found to describing my problem, and it doesn't offer much hope because the latest dvdauthor author does not indicate discontinuity. However, mplex verbose output appears to indicate the lengths of the audio and video streams, so I mplex'ed again to compensate for the difference. The largest offset was less than 70 msec, and it produced the same result as before. Because the duration is so large, I wonder if it's related to the GOPs? In any case, I don't know of any tools to investigate this or what to look for. The material is a talent show for kids. Everything is live-to-tape and high energy, and there are no convenient fade-to-black transitions where I can hide the flaws. (A few clips available here: http://uk.youtube.com/BeRioBoom) Has anyone seen this problem before? And solved it? Thanks, Craig. _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
