There's a really good program called ProjectX it's a java app with fixes most errors in av sync'ing .It hasn't failed to work on eveything I have thrown at it .once I get the output from Project X I use Avidemux2 to edit and re-encode to what ever format needed
I also have a wrapper script that output's *.mpg but haven't worked out a way to get mythtv to run it on recorded programs If you want the link to a compiled ProjectX email me On 7/4/05 12:21 PM, "Justin Gombos" <[EMAIL PROTECTED]> wrote: > * Ian Trider <[EMAIL PROTECTED]> [2005-04-05 20:58]: >> >> BTW, essentially if the problem you are referring to is audio sync, >> it is because of how the PVR-250 outputs streams -- the video and >> audio are aligned with via the PTS data, essentially timestaps, >> which dicates the temporal relationship between audio and video in >> an MPEG elementary stream. If something bad happens (i.e. a frame >> drop) the PVR-250 takes no notice of it; it will be indicated in the >> PTS data and the player deals with keeping the sync locked together. >> >> This isn't really wrong, and in fact seems like a good way to >> produce perfectly synced audio (because the temporal position of >> each frame of audio or video is indicated), but because most editing >> programs simply disregard this and work on the raw video and audio >> streams, you get 'issues' -- the lengths won't be exactly the same >> due to recording flaws (like frame drops) and it will go out of >> sync. >> >> The way to fix it is to have a program go through and readjust lengths >> of the audio and video so that the raw streams sync properly -- by >> dropping audio or video frames to make the actual video and audio >> streams match the PTS data. > > Wouldn't it be better in that case to reconstruct the missing video > frames, rather than drop audio frames? Missing video frames can > probably be reconstructed by interpolating the 'before' and 'after' > frames, no? > > BTW- I'd like to point out that this problem seems to occurr with the > Plextor tv402u. Sometimes part way into a capture video will get > quite choppy, and audio out of sync, which is probably a symptom of > the problem you describe. I just wanted to point that out, so folks > buying a Plextor ConvertX are aware that the bundled software is not > smart enough to resolve this problem. > > Does MythTV resolve this problem? > _______________________________________________ > mythtv-users mailing list > [email protected] > http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
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