Hi all,
I'm converting some movies from BD folders created by tsMuxeR (Blu-ray output).
With most of these movies I get the following info (timings differ):
AV synchronization issues were found in file 'H://t00_some movie_(2011).mkv' (title #1)
AV sync issue in stream 1 at 0:00:00.010 with duration of 10.666ms : 1 early frame(s) dropped at start
AV sync issue in stream 2 at 0:00:00.031 with duration of 32ms : 1 early frame(s) dropped at start
Do I need to worry? Can this "frame dropping" result in a visual or audible glitch in the movie?
Edit: And does this mean that tsMuxeR is/was messing with the AV sync of the movie in general?
Thanks for any info,
S.
"AV sync issue" Question / Frame dropping?
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Re: "AV sync issue" Question / Frame dropping?
Just try one and find out ;>}
Re: "AV sync issue" Question / Frame dropping?
Yes, but maybe my player (Popcorn Hour A-200) does not show any glitches but another player will.
I was hoping for a more technical explaination of that behaviour. Maybe the frame dropping at the start is totally normal and nothing to worry about.
I was hoping for a more technical explaination of that behaviour. Maybe the frame dropping at the start is totally normal and nothing to worry about.
Re: "AV sync issue" Question / Frame dropping?
The reason, so far as I can tell, is that on some branching discs, frames are repeated when it movies between each m2ts file. So if MakeMKV didn't drop frames eventually you'd lose sync.
Blu-ray players must have a similar mechanism built into them.
Blu-ray players must have a similar mechanism built into them.
Home Theater PC: Assassin HTPC, XBMCbuntu 12.0 (Frodo), Intel i5 3570k 3.4 GHz Ivy Bridge w/ HD 4000, LG BD-ROM
Playback Devices: Mede8er MED600X3D, MyGica EnjoyTV 120, Xtreamer SideWinder 3, Crystal Acoustics MediaMatchBox
Playback Devices: Mede8er MED600X3D, MyGica EnjoyTV 120, Xtreamer SideWinder 3, Crystal Acoustics MediaMatchBox
Re: "AV sync issue" Question / Frame dropping?
I just found out that such a MKV movie (with dropped frames) has a delay info added to MediaInfo's analysis:
Audio #1
..
Delay relative to video : 32ms
..
The same movie done directly from the BD does not have that line.
I guess that proves that the tsMuxeR step produces a 32ms sync problem...![Crying or Very sad :cry:](./images/smilies/icon_cry.gif)
Audio #1
..
Delay relative to video : 32ms
..
The same movie done directly from the BD does not have that line.
I guess that proves that the tsMuxeR step produces a 32ms sync problem...
![Crying or Very sad :cry:](./images/smilies/icon_cry.gif)
Re: "AV sync issue" Question / Frame dropping?
I think MakeMKV only got the option "Show AV synchronization messages" in 1.7.0. I've been using all the versions for a while, and I have only seen the messages appear recently. They do appear sometimes when I am ripping directly from a blu-ray disc.