SamES 890 Posted September 24, 2016 Share Posted September 24, 2016 (edited) I have 2 laptops, identical hardware, both with ET installed. On one laptop the audio creeps ahead of the video and the sync error is quite noticeable after only 10 minutes. It is very repeatable. On the other device, everything plays fine. I've had both devices playing the same movie at the same time and can confirm that the audio on one device is getting ahead rather than the video lagging behind. I have tried different titles and different formats. They all direct play, no transcoding is involved. The audio always gets ahead of the video and it gets worse the longer you play. I've tried the standard ET version as well as the new UWP version. I've tried uninstalling and reinstalling. The device that plays correctly also has VLC installed (but ET uses the internal player) I installed VLC on the other device (but still use internal player) and now playback on it is fine. No sync issues. Any idea what could be going on here? theater-63609875910.txt Edited September 24, 2016 by SamES Link to comment Share on other sites More sharing options...
tman 47 Posted September 24, 2016 Share Posted September 24, 2016 Ok, sorry to jump on this thread, but I've also noticed audio-sync issues in later versions of ET. I wasn't sure if it was me at first (I'n very sensitive to it), but if I use the internal player, audio sync problems are very noticeable (using MadVR/LAV as always). If I play the same video in MPC-HC (again using MadVR/LAV) on the SAME PC, there's no problem. I'm using Win7, so no UWP version to test. Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 24, 2016 Share Posted September 24, 2016 @@babgvant could the rebuilt LAV help with this? Link to comment Share on other sites More sharing options...
SamES 890 Posted September 24, 2016 Author Share Posted September 24, 2016 @@babgvant could the rebuilt LAV help with this? Happy to try and reproduce the problem. How do I install/test the rebuilt LAV? Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 25, 2016 Share Posted September 25, 2016 Happy to try and reproduce the problem. How do I install/test the rebuilt LAV? Here's the zip file and where to extract it. I deleted the LAV folder, first. Link to comment Share on other sites More sharing options...
SamES 890 Posted September 25, 2016 Author Share Posted September 25, 2016 Here's the zip file and where to extract it. I deleted the LAV folder, first. So is LAV even used with the UWP version of ET? Link to comment Share on other sites More sharing options...
Luke 37008 Posted September 25, 2016 Share Posted September 25, 2016 No, the UWP version uses the native windows 10 player, which in turn relies on Windows Media Foundation. Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 25, 2016 Share Posted September 25, 2016 I wonder if you're experiencing some frame dropping. Depending on how may frames are being dropped, the difference could be subtle but would be more noticeable over time. What GPU do you have and are the drivers up to date? Link to comment Share on other sites More sharing options...
jayw654 5 Posted September 25, 2016 Share Posted September 25, 2016 yeah, ET needs better checks to ensure audio and video syncing are correct for all media formats. Link to comment Share on other sites More sharing options...
SamES 890 Posted September 25, 2016 Author Share Posted September 25, 2016 I wonder if you're experiencing some frame dropping. Depending on how may frames are being dropped, the difference could be subtle but would be more noticeable over time. What GPU do you have and are the drivers up to date? The two identical laptops described in the first post are i7-2630QM's Initially I thought it was dropping frames as well. One of the tests I did was to start the same title playing on both identical laptops (one with VLC and one without) at the same time. Audio and video were in sync. After about 15 minutes, on the laptop without VLC the audio was about 1 second ahead, but the video was still in sync. Link to comment Share on other sites More sharing options...
SamES 890 Posted September 26, 2016 Author Share Posted September 26, 2016 So I've done some more testing, and even with VLC installed the audio is getting ahead in the UWP version, (this makes sense based on Luke's comments as I would expect that VLC shouldn't have any impact). I did play longer than my previous tests, and I think the amount it gets ahead may be a little random. I've uninstalled VLC from the original laptop. Initially it played OK, with UWP, but today it has bad audio sync. Not sure what's going on here but the amount of sync error is random (audio always seems to be ahead) but it definitely out most/all of the time. Link to comment Share on other sites More sharing options...
Luke 37008 Posted September 26, 2016 Share Posted September 26, 2016 Since UWP relies in Windows Media foundation anything that messes with that such as various codec packs can affect playback within the app. Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 26, 2016 Share Posted September 26, 2016 (edited) I have just experienced a lipsync issue. Th file was an AVI, with MPEG4 and MP3. I am presently re-encoding it to see if that makes a difference. Edited September 26, 2016 by Doofus Link to comment Share on other sites More sharing options...
Guest asrequested Posted September 26, 2016 Share Posted September 26, 2016 A quick remux to mkv and it seems to play fine after about 15 minutes. Maybe there's an issue with the splitter? I can share the files, but you'd need a big chunk of it to test and it wouldn't be a small file. Link to comment Share on other sites More sharing options...
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