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| OTA -> DVD results in audio slowly losing sync - MostlyFi http://forum.linhes.org/viewtopic.php?f=15&t=10317 |
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| Author: | lantz [ Fri Jun 02, 2006 12:56 am ] |
| Post subject: | OTA -> DVD results in audio slowly losing sync - MostlyFi |
edit - adding "-async 1500" into the ffmpeg recode line in mythburn.py has really helped out on this. 1500 is probably overkill (make sure you do > 1 since 1 means it will only sync the audio at the start). The place I got the idea from recommended 50. Lantz ---------------- Ok, I've been fighting against this for a while now and I was wondering if anyone else is getting this to work. I have an AirStar HD5000 and am getting OTA signals here in Chicago. I have no problems recording shows. The recorded mpegs play with correct audio sync in myth and with xine or whatever. However, when I create a DVD the audio falls out of sync (the audio starts in synch and drifts out around .5 to 2 seconds per half an hour depending on the recording). The file kicked out of the original mythreplex (to apply the cut list or just to clean things up-- tmp) plays with perfect sync. However, once it gets ffmpeg'd out to the two streams (m2v and ac3) they are out of sync. When I load the streams demuxed into my windows dvd creation software it reports the ac3 as being shorter than the m2v so I don't think it's a problem replexing the files back together. I have tried the following things: 1) Upgrade projectx, ffmpeg, and mytharchive 2) use projectx to demux instead. This doesn't work as the files created can't be re-muxed together. 3) Run the mpg created from the initial mythreplex (tmp) run through projectx -tom2p to turn it into an .m2p mpeg and run the .m2p through ffmpeg. Still audio synch issues. 4) Run the .ac3 streams created through projectx --demux. This fixes stream errors really well. However it doesn't seem to alter the timing of the ac3 at all. 5) copied over mpeg to windows and tried out PVAStumento. I couldn't get it to get all the way through a file without crashing. Anyone got this working or have any ideas? Thanks, Lantz |
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| Author: | cliffsjunk [ Mon Oct 22, 2007 10:01 am ] |
| Post subject: | |
I know this is an old post, but I fought similar problems for so long I thought I would add this for others to see. The fixes that I did in this post (look for post by cliffsjunk): http://mysettopbox.tv/phpBB2/viewtopic.php?t=13552&highlight=first+second Fixed the audio sync issues that I had in the DVD's that I burned. |
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