10Bit HEVC decoding on FireTV Stick (Gen2) improperly attempts to direct play

[Lord-Malgus]

The FireTV Stick (Gen2) model now supports HEVC decoding, Hooray! However it currently only supports 8-Bit HEVC decoding. If it attempts to decode 10-Bit HEVC it bombs out. It does not appear that Emby takes this factor into account. As when attempting to watch a 10Bit Encoded x265 video file, it attempts to directplay it.

encoder : Lavf57.72.101
Stream #0:0: Video: hevc (Main 10), yuv420p10le(tv), 1920x800 [SAR 1:1 DAR 12:5], q=2-31, 23.98 fps, 23.98 tbr, 90k tbn, 1k tbc (default)
Stream #0:1: Audio: aac, 48000 Hz, stereo, fltp
Stream mapping:
Stream #0:0 -> #0:0 (copy)
Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
frame= 2467 fps=0.0 q=-1.0 size= 43466kB time=00:01:42.81 bitrate=3463.4kbits/s speed= 206x
frame= 4695 fps=4693 q=-1.0 size= 88718kB time=00:03:15.73 bitrate=3713.0kbits/s speed= 196x

All looks fine from the server side, however the Emby client fails to play.

This is a request for Emby to Detect when the client is a FireTV Stick Gen2, to only initiate directPlay on an HEVC encode if it is 8Bit. 10Bit or greater should transcode.

[LukePulverenti]

is there an ffmpeg log? can you please attach that? thanks !

[Lord-Malgus]

Mediainfo does report the 10bit encoding in the log:
"PixelFormat":"yuv420p10le"

Anything over yuv420p, should be transcoded with FireTV stick (Gen2). Although further testing might be warranted.

hevc_10bit_fireTV_stick_gen2_log.txt

This issue really only applies to the FireTV stick Gen2 model.. As the old fireTV stick did not support HEVC natively , and the FireTV boxes already support 10Bit HEVC..

The Gen2 Stick uses the Mali-450 GPU, Mali-T800 GPU is required for 10-bit color depth. So this is a hard limitation on this stick.

[ebr11]

Hi. Can you please send a log from the app and then provide the information requested in the instructions linked below? Thanks.

https://emby.media/community/index.php?/topic/739-how-to-report-a-problem/

[Lord-Malgus]

Lost access to FireTV stick Gen2 at this time. I will re-open when I have access to another Gen2 stick, and am able to supply logs for this issue.