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+---- Thread: 24p and audio sync issues (/showthread.php?tid=80247)
RE: 24p and audio sync issues - DDDamian - 2012-05-01 00:48
@torcar - can you give us a debug log? Start one of the problem files and let it run till a few minutes past the issue. Sounds like the timestamps are borked in them.
RE: 24p and audio sync issues - robl45 - 2012-05-01 00:58
i used the AE build, it was better on xvid/avi files, but still had the same issue that the regular build does, the missing counter ramps up, maybe not at first, but then randomly it would just get out of sync.
RE: 24p and audio sync issues - DDDamian - 2012-05-01 19:37
Hi torcar - from what I can see in your log and from your description it is almost certainly bad timestamps in those files. As a test you can try demux/remux them with mkvmerge or eac3to.
A patch was submitted recently for review that attempts to fail a little more gracefully when these are encountered, and it may help with these files, but there's no set timeframe for inclusion or not into master.
I would try the demux/remux on the file(s) and see if it helps as about the only short-term workaround.
RE: 24p and audio sync issues - torcar - 2012-05-01 20:18
@DDDamian: Ok, will try that as soon as possible.
FYI: I have about 500-600 .mkv's and the problem seems to be present on as good as all of them... (Haven't tried ALL of them, but I also haven't found any that does not go out of sync yet)
Thanks so far
RE: 24p and audio sync issues - DDDamian - 2012-05-01 20:26
Big ouch - I thought this was limited to a few files. Can you focus on one known problematic one and see if it happens at a fixed location in the file? If so, a sample uploaded of that portion would be beneficial.
RE: 24p and audio sync issues - torcar - 2012-05-01 20:30
Will do that.
One question though... Is there any way I can actually see when it gets out of sync or do I just have to register it with my eyes and ears?
Some movies aren't that easy to spot sync-problems in before you get to scenes with talking, shooting, knocking etc
RE: 24p and audio sync issues - DDDamian - 2012-05-01 20:53
Press "O" while watching a movie and watch dropped frames ("Drop: xx"). If there are timestamp issues this should increment.
In the log, look for any Discontinuity errors *after* Pull-up correction" has been applied.
RE: 24p and audio sync issues - torcar - 2012-05-02 16:35
Sorry, took a while to do all the testing.
I have now tested about 15 different .mkv's. A mix of 720p, 1080p, DD5.1 and DTS. All of them display the same symptoms with some variation regarding when the sync-issues start... but usually within less than 30 minutes. Most often within 0-10 minutes.
I have also tested the same files on a Popcorn Hour C-200, a WDTV gen.3 and of course on the XBMC rig using MPC in windows... all without any flaws im kinda sorry to say;/
I see both dropped frames increasing, and several discontinuity errors in the log-file.
RE: 24p and audio sync issues - DDDamian - 2012-05-02 17:23
@torcar - this is starting to point more to buffering/caching than anything else. Try copy a movie to a local drive and let it play completely through while monitoring the OSD periodically.
RE: 24p and audio sync issues - torcar - 2012-05-02 17:29
Will do. Not sure if I'll have the time before the weekend, but I will post back as soon as I've tried.