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Direct Stream transcoding video if PGS subtitles are used


Xorp

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Okay, so that explains it.  This is a thread in the Android TV forum but you are using the Samsung TV app.  The different apps and platforms have different capabilities.  Indeed, the Samsung app cannot display PGS subs so your best bet is to obtain text-based subtitles.

 

Thanks.

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thegrunge

@@ebr oh ok but this is the same things on amazon firestick and it work with android. This time according to Emby the reason for the transoding would be the audio format ... but in the log we always see a problem with the subtitles pgs and we must not forget that the same file plays in direct reading without subtitle and with the same device on my plex server, so audio is not the real problem. On my iphone the same movies is direct play, but the same problème with my chromecast.

 

Thank you

Emby Server PGS codec not found.rtf

Edited by thegrunge
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thegrunge

@@ebr Wouldn't that be a problem with server-level codecs? I don't understand why with Emby I transcode with pgs but not with plex with the same device

 

Thank you

Edited by thegrunge
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@@ebr Wouldn't that be a problem with server-level codecs? I don't understand why with Emby I transcode with pgs but not with plex with the same device

 

Thank you

We both use the same google exoplayer to play videos:

https://github.com/google/ExoPlayer

They have done additional development on their own private version of exoplayer to support PGS. We may eventually get there as well.

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We both use the same google exoplayer to play videos:

https://github.com/google/ExoPlayer

They have done additional development on their own private version of exoplayer to support PGS. We may eventually get there as well.

 

Your issue has nothing to do with any additional functionality they have done with PGS subs.

 

As I explained above, on this app (Android TV) your issue is the audio codec not being supported on the device (just as the app told you).

 

 

PGS subs by themselves do not require transcoding. It is only because some other factor of your media is not playable on the device.  My guess would be the audio track.  If you provide compatible audio tracks, or set the app to downmix to stereo, then transcoding will probably not be required at all.

 

On the LG app, PGS subs are not supported no matter what.

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thegrunge

@ebr Hello, the device has nothing to do here are 2 screenshots reading the same movie with PGS subtitle on the same device with Emby and Plex. Drop it it doesn't lead to anything anyway. I wanted to mention the problem at the start, but we're going in a different direction. It does not matter without subtitles while playing live whether on the samsung, the firestick and chromecast..

 

Thank you

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post-177488-0-99975400-1582389200_thumb.png

Edited by thegrunge
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The Fire TV cannot play back DD+ at the high bitrate of your audio track.  Therefore, it needs to remux to convert the audio to a compatible bitrate.  That then requires the burning in of the subs.

 

There are a few things you can do to mitigate this situation:

 

1) Obtain text-based subs

2) Obtain or select a compatible audio track for the device

3) Select "Downmix to Stereo" in the app settings and the audio will be mixed down locally

 

Any of those options will provide much better performance in this situation.

 

Thanks.

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thegrunge

@@ebr I don't think look the first picture. the other picture are the same movie without using PGS subtitle on différent device. All the device are direct played or direct streaming

post-177488-0-78560200-1582396441_thumb.png

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post-177488-0-82940900-1582396900_thumb.png

post-177488-0-71230500-1582396908_thumb.png

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I'm sorry, I don't know how else to explain it but what I described and the remedies available are correct at the moment.

 

Thanks.

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Happy2Play

I'm sorry, I don't know how else to explain it but what I described and the remedies available are correct at the moment.

 

Thanks.

 

I guess the question is how are the other guys supposedly direct playing  the ac3 5.1 640 bitrate, when Emby says it is unsupported? 

 

post-177488-0-78560200-1582396441.png

 

I am not seeing DD+ track only ac3 5.1 640 bitrate in attached file in post 27.

&VideoCodec=h264,mpeg2video,hevc,h265&AudioCodec=aac,mp3&VideoBitrate=79360000&AudioBitrate=640000
&TranscodeReasons=AudioBitrateNotSupported
Edited by Happy2Play
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pünktchen

Independent of the question why Emby doesn't like the audio codec, the burn in of PGS subtitles could be prevented by choosing MKV as a container like Plex does instead of HLS stream with TS container.

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I guess the question is how are the other guys supposedly direct playing  the ac3 5.1 640 bitrate, when Emby says it is unsupported? 

 

 

 

I am not seeing DD+ track only ac3 5.1 640 bitrate in attached file in post 27.

&VideoCodec=h264,mpeg2video,hevc,h265&AudioCodec=aac,mp3&VideoBitrate=79360000&AudioBitrate=640000
&TranscodeReasons=AudioBitrateNotSupported

 

The current beta of the app lifts the bitrate restriction.  We applied this due to reports of bad playback without it.

 

I'm a bit wary of whether this is going to end up being a good thing as I already see a report of bad playback with a high-bitrate stream on the Fire.

 

It is also possible that, once Amazon finally updates their port of Exo, this will help as well.

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