MediaCodec isn't working for Transcoding

[natsu 4]

Hi,

 

I've used the Emby Server for android version 3.6.0.54 on my android platform with marshmallow & MTK HW, when enable the transcoding for HEVC & H264 Content, I've found that the mediacodec can't be started with ffmpeg,and return the log with following:

 

[hevc_mediacodecndk @ 0x7f8f6b9400] NdkDec: mediacodec_name: OMX.MTK.VIDEO.DECODER.HEVC
Stream mapping:
Stream #0:0 -> #0:0 (hevc (hevc_mediacodecndk) -> h264 (h264_mediacodecndk))
Stream #0:1 -> #0:1 (flac (native) -> mp3 (libmp3lame))
Press [q] to stop, [?] for help
[hevc_mediacodecndk @ 0x7f8f6b9400] NdkDec: MediaCodec output format changed: mime: string(video/raw), stride: int32(1920), slice-height: int32(1080), color-format: int32(19), image-data: data, width-ratio: int32(1), height-ratio: int32(1), crop: unknown(9), width: int32(1920), height: int32(1080), what: int32(1869968451)}
[h264_mediacodecndk @ 0x7f8f0fd800] [Eval @ 0x7ff4ad79e8] Undefined constant or missing '(' in 'high'
[h264_mediacodecndk @ 0x7f8f0fd800] Unable to parse option value "high"
[h264_mediacodecndk @ 0x7f8f0fd800] Error setting option profile to value high.
Error initializing output stream 0:0 -- Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
[libmp3lame @ 0x7f8f0fe700] 3 frames left in the queue on closing
Conversion failed!

 

And the transcoding will revert to CPU, which is slowly than native playing on android, may someone help with me?

 

CPU: MediaTek MT6753

GPU: ARM Mali-T720

Storage : SDHC 16GB Class 10

 

Sincerely,

Natsu.

ffmpeg-transcode-2d029ef6-c6f6-4b27-9973-01bb68b732cf_1.txt

ffmpeg-transcode-3eb04fef-af42-4940-92c6-49304447cbd5_1.txt

[Luke 37008]

We'll see what @@softworkz thinks. Thanks !

[softworkz 3326]

@@natsu - Your setup is very interesting. 

 

Could you please post or PM the first few hundred log lines after server start?

That would be a great help!

 

Regarding your problem: On the transcoding settings page, have you configured a "high" profile for H.264 encoding?

 

Please set this back to "Auto" and try again..

[natsu 4]

Hi Softworkz,

 

In the Emby Server, I've already set it to Auto on "H264 encoding preset", and the problem is still existed.

 

Attached my device's emby system log to you, thanks!

embyserver.txt

embyserver-debug.txt

Edited October 11, 2018 by natsu

[natsu 4]

Another Device as HTC Desire 820 with Marshmallow also have this problem, thanks!

 

CPU: Snapdragon 615

GPU: Adreno 405

 

emby-server.pdf

emby-transcoding-desire820.pdf

[natsu 4]

Hi All,

 

Please remind me that the transcoding problem is fixed, thanks!

[Luke 37008]

Please try again with the latest update. Thanks !

[natsu 4]

Hi Luke,

 

Checked the Version 3.6.0.55 & 3.6.0.56 still has problem as 3.6.0.54 I met before, thanks!

[Luke 37008]

We'll see what @@softworkz thinks. Thanks.

[softworkz 3326]

We currently have a bug where we are supplying incorrect profile and level data.

 

Until this is fixed, it would be interesting whether it would work if you deactivate hardware encoding and just leave decoding enabled. 

I say interesting because your HEVC hardware decoder advertises only 1280x720 as its maximum frame size and your video is 1920x1080, so probably it won't work.

 

Also, the AVC hardware encdoder reports 1920x1072 only - but this is probably a mistake by the codec implementor.

Anyway, the important part is encoding, not decoding. How that will work  - we'll only know after we've fixed the mentioned bug...

[natsu 4]

Hi Softworkz,

 

Thanks, I'll take a look about the different point between ARM Mali & Qualcomm, if necessary I'll check the problem is depended on MT6753 Android OS or not, thanks again!

[Luke 37008]

Thanks !

[natsu 4]

Hi Softworkz & Luke,

 

Checked that the MT6753 platform with Mali-T720 MP3 with following:

 

HEVC HW decoding just support 720p, so it's impossible for me to check the HEVC format

H264 HW decoding is support 1080p, but the 1080p encoding has problem on other player like VLC android checked, seems problem from Infocus M808 OS Image, I'll use the 720p encoding to check the bug first before found another OS image.

 

For Snapdragon 615 with Adreno 405, it's outdated chip (and very hot...) for me and it shouldn't to continue to focus on, but may refer the problem whether is ffmpeg problem or not.

 

anyway, thanks for your comments!

 

Sincerely,

Natsu.

Thanks! 

[Luke 37008]

Thanks for the info.

[natsu 4]

Hi Softworkz,

 

is it necessary that  the "-profile:v high -level 4.1" command existed? how can I remove temporary for debugging? thanks! 

[softworkz 3326]

It's being worked on and will be fixed for the next version (hopefully). Sorry for the inconvenience.

[natsu 4]

Hi Softworkz,

 

Thanks for your comment, please remind me to check again if the problem is solved or implemented, I've changed to Nokia 3 with MT6737, although the HEVC decoding is lost compard to MT6753... But the OS image is pure for us to debug the problem...

 

Sincerely,

Natsu.

Edited November 11, 2018 by natsu

[nyplayer 90]

There is a problem with hardware transcoding of MPEG2 1080I it stutters.... Just an FYI not being critical but Plex transcodes these just fine.

ffmpeg-transcode-83ed451e-3f08-49a6-ab2e-d6a2bcd3ed50_1.txt

Edited November 11, 2018 by nyplayer

[natsu 4]

After tried 3.6.0.63, the 480p & 720p H264 video is workable for transcoding with Mediacodec, thanks!

 

Edited: Checked that the Problem is on Arm Mali T720 is 720p deocding & encoding only, not depended on CPU model, so the problem may occur on other vendor chipset.

 

But for 1080p H264 Video, I need to use another phone which is either MT6753 nor MT6737 to check...

Edited November 13, 2018 by natsu

[Griffinlarry95 0]

Can I receive a server??

 

Sent from my VS500 using Tapatalk

[natsu 4]

Would you need the NAT access into my Android Phone?