mpg format and audio video sync

[adwuk 3]

Hi - first post here and just setting up an Emby server for our personal use.  We have a LG Smart TV running WebOS 3.3 and I have setup the Emby server to force direct play of mkv, m4v and mpg formats (using the DLNA profiles). I am also using the latest Emby app on the TVs.

 

Long story short is that there is a noticeable delay with the sound vs video when streaming mpg files vs mkv or m4v files.  This is true when either using DLNA or playing from the Emby app.

 

I am happy to provide additional details of our setup, but I just wondered if anyone else has experienced this to date?

[mastrmind11 722]

Is it ALL mpeg files?  What happens if you convert an mpeg to mkv?

[adwuk 3]

Its all of the mpg files I have tried so far.  When I convert to mkv, and now just tested m4v, there doesn't seem to be a problem.

 

Here are the details for a file which lags on the LG TV (either in the app or via DLNA client), but not on other devices (Android phone or iPad):

 

Video

Codec H264

Codec tagavc1

AVC Yes

Profile Main

Level 40

Resolution 704x288

Anamorphic No

Interlaced No

Framerate 24.9971924

Bitrate 626 kbps

Bit depth 8 bit

Pixel format yuv420p

Ref frames 1

NAL 4

Title 480P H264

 

Audio

Language eng

Codec AAC

Codec tag mp4a

Profile LC

Layout stereo

Channels 2 ch

Bitrate 164 kbps

Sample rate 48000 Hz

Default Yes

Title Eng AAC stereo Default

Container mp4

[mastrmind11 722]

Does the tv support mpeg?

[adwuk 3]

I am guessing that it does because it plays the file, albeit badly. I know that no Emby transcoding is taking place because I have disabled it for the user.  It is possible that the TV is doing some transcoding, but personally I doubt it because there are some streams that it doesn't support, and even the DLNA player comes back with a playback/unsupported stream error.

[adwuk 3]

It looks like the problem was down to variable frame rates in the video stream rather than container format.  I am doing a few more check to confirm, but I now have a constant frame rate MPG playing well and a variable framerate M4V playing badly.

[Luke 42077]

Emby for LG 1.06 has just been released. Please try it out. Thanks !