Video is playing in SDR instead of DV during audio transcode to Dolby

[kelstar 1]

I really like Emby and it has a really cool feature in the options to convert unsupported audio to dolby audio (instead of downmixing to stereo). It matters a lot to me, since some media files have truehd or dts codec which is unsopported by my tv and i want them to be transcoded to dolby, not stereo.

But the problem is that when I switch to the unsupported audio track - the audio is converted and played as Dolby yes, but the picture becomes SDR. In the stats it is still displayed as being directly played but the info in the TV itself shows that the picture mode is not Dolby Vision and not even HDR.

First screenshot is when the video is played with supported audio track and you can see that video is in DV format. Second screenshot is when I switch to unsupported (trueHD). Conversion happens so the audio is Dolby still, but the video lacks DV format and by all picture settings it's just SDR

 

Spoiler

 

 

[visproduction 315]

I don't actually use transcoding.

I think, audio conversion + video conversion has to be less than your top allowed setting for transcoding.  Audio can take more processing than you may imagine.  What happens if you set your transcoding bandwidth upwards?

[kelstar 1]

Transcoding bandwidth is not limited in my setup, I am streaming from local server. So the main problem is that when audio is converted, video is not played in DV (as expected), so actually it feels like a bug

[visproduction 315]

Kel,

It is probably worthwhile to get some official test demo videos from online for size and codecs the same as your content and see if these transcode correctly.  If these test videos have the same issue, then you have narrowed down the problem.  If they play fine, then the problem is your media.   It is good to know that answer, otherwise, you are trying to fix something that is not the problem.  I hope that makes sense.

You can also check the quality of your media with ffprobe or some other software.  Playing the media back on another video player doesn't really check very much.  The media could still have many issues and you don't see it.  A lot of players will automatically fix playback on problem media.  VLC does have a info and running stats you can pull up.  There are a lot of issues that media can have that cause playback error in browsers and on TV apps.

 

[ebr 16169]

Hi. Once we have to change it to stream via HLS, DV is no longer supported.

Can you try searching for our standard android app (Just "Emby" on Amazon and "Emby for Android on Google) on the same device's app store and see how that compares?

Thanks.

 

[kelstar 1]

1 hour ago, ebr said:

Hi. Once we have to change it to stream via HLS, DV is no longer supported.

Can you try searching for our standard android app (Just "Emby" on Amazon and "Emby for Android on Google) on the same device's app store and see how that compares?

Thanks.

 

Oh, I thought it has something to do with the type of stream, because that's the only thing that differs, http vs hls stream.

Will that be fixed (in any verion of the app)? Because technically it's possible, Plex can transcode sound to ac2 while sending DV to my device.

 

Standart Android app doesn't have th ability to convert unsupported audio to doly, so I can't compare them, since the feature is not present.

[Luke 42077]

On 12/16/2024 at 10:33 AM, kelstar said:

Standart Android app doesn't have th ability to convert unsupported audio to doly, so I can't compare them, since the feature is not present.

Hi, we are planning on adding this, so stay tuned.