Odroid N2, Audio and Video slowly become out of sync the longer a movie plays

So I have been using my Odroid N2 for about a month now, most files are just fine. However, I occasionally get a file (Typically only 4K content) that when you start the movie off. Audio/Video are perfectly in sync and it looks great. About 1/2 way through a movie… you start to realize that the audio is falling behind?
So I offset it to fix it about 500ms (it is a lot I know). Then another hour goes by… and its behind again! So I check and offset it ahead by an entire second now… and its back in sync.

So from what I can tell, it appears like as the video continues to play… it becomes more and more out of sync. I have heard of others having a similar issue and they simply rewind it 10 minutes and it “fixes” it again. However, this is not the case… I can start a long 2 hour movie, play 10 min and its fine. Skip ahead to 1/2 way through the movie and it is out of sync again, skip to the end and its even more out of sync.

The first few times this occurred, I figured it was a poor file. However, it has now happened numerous times (at least 5-6 times) so I’m wondering what the deal is? Is there a specific file that it can’t handle? Is there a setting I can tweak?

So far I have adjusted my Receiver to enable/disable auto lip sync, and it doesn’t appear to help at all. I saw some settings with kodi for “Sync playback to Display”. So I tried to enable that without luck as well… (I also wanted to avoid it, as I wanted it to passthrough the audio to the receiver to handle.)

Any tips or recommendations?

Here is some additional information. Here is 2 files that have issues, the 2nd one is more drastic… but its also twice is long… and then finally a 3rd file that doesn’t have issues. It is slightly off, but not enough that I would care. I does still appear to have issues towards the end, but its so minimal I don’t notice it.

File 1, not too bad by the end of the movie.

Audio #1
ID                                       : 2
Format                                   : MLP FBA 16-ch
Format/Info                              : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name                          : Dolby TrueHD with Dolby Atmos
Codec ID                                 : A_TRUEHD
Duration                                 : 1 h 41 min
Bit rate mode                            : Variable
Bit rate                                 : 4 597 kb/s
Maximum bit rate                         : 5 742 kb/s
Channel(s)                               : 8 channels
Channel layout                           : L R C LFE Ls Rs Lb Rb
Sampling rate                            : 48.0 kHz
Frame rate                               : 1 200.000 FPS (40 SPF)
Compression mode                         : Lossless
Delay relative to video                  : 32 ms
Stream size                              : 3.25 GiB (8%)
Title                                    : Wreck.It.Ralph.2012.2160p.BluRay.REMUX.HEVC.TrueHD.7.1.Atmos-FGT
Language                                 : English
Default                                  : Yes
Forced                                   : No
Number of dynamic objects                : 13
Bed channel count                        : 1 channel
Bed channel configuration                : LFE

File 2, this one is really bad by the end of the movie. It is a long movie though.

Audio #1
ID                                       : 2
Format                                   : MLP FBA 16-ch
Format/Info                              : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name                          : Dolby TrueHD with Dolby Atmos
Codec ID                                 : A_TRUEHD
Duration                                 : 2 h 24 min
Bit rate mode                            : Variable
Bit rate                                 : 3 498 kb/s
Maximum bit rate                         : 6 000 kb/s
Channel(s)                               : 8 channels
Channel layout                           : L R C LFE Ls Rs Lb Rb
Sampling rate                            : 48.0 kHz
Frame rate                               : 1 200.000 FPS (40 SPF)
Compression mode                         : Lossless
Delay relative to video                  : 17 ms
Stream size                              : 3.53 GiB (17%)
Language                                 : English
Default                                  : Yes
Forced                                   : No
Number of dynamic objects                : 11
Bed channel count                        : 1 channel
Bed channel configuration                : LFE

File 3, this one is working fine. It stays good through most of the movie, it is just slightly off by the end.

Audio #1
ID                                       : 2
Format                                   : MLP FBA 16-ch
Format/Info                              : Meridian Lossless Packing FBA with 16-channel presentation
Commercial name                          : Dolby TrueHD with Dolby Atmos
Codec ID                                 : A_TRUEHD
Duration                                 : 1 h 44 min
Bit rate mode                            : Variable
Maximum bit rate                         : 5 016 kb/s
Channel(s)                               : 8 channels
Channel layout                           : L R C LFE Ls Rs Lb Rb
Sampling rate                            : 48.0 kHz
Frame rate                               : 1 200.000 FPS (40 SPF)
Compression mode                         : Lossless
Language                                 : English
Default                                  : Yes
Forced                                   : No
Number of dynamic objects                : 11
Bed channel count                        : 1 channel
Bed channel configuration                : LFE

How do you know that the video files are good?
Other box play them without this issue?

1 Like

I’m not positive they are good… I’m still testing them. I have recently tried downloading “remux” files. I didn’t understand what they were… but starting to get a better understanding. I have tried to play the file locally and on other peoples setups and it does the same thing, so I believe this is a bad file(s).