Pixelation

[tuvx 14]

Problem playing some videos, see screen shot.

[tuvx 14]

Log file

embyserver.txt

[ebr 16194]

If your server is transcoding, try adjusting some of the hardware acceleration options.

[Luke 42085]

Was there an ffmpeg log? If so please attach that too. Thanks.

[tuvx 14]

Attached.

ffmpeg-transcode-08a3e538-1bc9-47a7-a601-2dabf8eeefbf_1.txt

[tuvx 14]

Would you provide some guidance on "try adjusting some of the hardware acceleration options."? I have been using for a couple years and have never been required to modify these settings; until today I have had no issues with playback but now seems much of my media is having this issue (anything at 480i)

Edited May 2, 2019 by tuvx

[Luke 42085]

As a test, can you try turning off hardware acceleration under server transcoding settings? Then try to play again. Please see how that compares. Thanks !

[tuvx 14]

It seems to work, for now.

Will disabling HW acceleration affect performance?

[Luke 42085]

@@softworkz any thoughts?

[Luke 42085]

@@tuvx can you help us isolate this. Please use the advanced option on that same screen to enable hardware encoding but not decoding. Then see if the problem occurs. Then please try the opposite and see if it occurs. Thanks !

[softworkz 5073]

@tuvx - In addition to that: When you use the advanced option: Do you see two versions of each QuickSync codec? (One _with_  'D3D11' in the name and one without?)

 

If you see two versions: Could you please disable all including 'D3D11' and only enable those without?

If you see 'D3D11' versions only: Could you connect a monitor to the Intel graphics and reboot?

[Tombo 0]

I'm having the same issue - distorted picture / green pixelation like others in this (and other) threads under Win10/64-bit.

 

I can confirm my issue is also with QuickSync (assuming ffmpeg since that's doing the encode/decode/transcode).

 

Server is a NUC with Celeron N2807. During transcode, dashboard reports: QuickSync off = 14-17fps no distortion. QuickSync on = 60fps distortion.

 

In advanced transcoding section, I've tried all combinations of selecting/not selecting/prioritizing the 3 choices available for h.264: 1. QuickSync Intel HD Graphics - H.264 (AVC), 2. QuickSync Intel HD Graphics - D3D11 H.264 (AVC), and 3. DX11VA Intel HD Graphics - H.264 (AVC).

 

If the first one is not selected AND made the preferred codec, QuickSync does not work and falls back to software. If there's really only one choice that makes use of QuickSync, I don't know why the other two choices are available?

 

I've also tried all combinations of H264 preset speeds, Constant Rate Factor, throttling on/off, etc. and the results are the same.

 

If the player is set to full quality (1080p 60fps regardless of original content fps) then there is also no issue since there is no transcoding and video is just streaming original file. Results are same regardless of client, whether it's iPad, iPhone, or PC / local network or LTE so client/network does not matter.

 

Since others starting posting this issue last year (when Emby had builds enabling QuickSync) I will assume it will probably not be solved soon since ffmpeg is third-party and hard to duplicate due to variations in everyone's hardware. And because there are no actual errors being generated in the logfiles - only incorrectly processed video being piped out of ffmpeg.

 

So my question is - what file do we edit to change ffmpeg's settings (would be great to see this in the advanced codecs section in the future for troubleshooting purposes)? I'd gladly post any results if you point me in the right direction...

 

 

 

Edited July 30, 2019 by Tombo

[Luke 42085]

I'm having the same issue - distorted picture / green pixelation like others in this (and other) threads under Win10/64-bit.

 

I can confirm my issue is also with QuickSync (assuming ffmpeg since that's doing the encode/decode/transcode).

 

Server is a NUC with Celeron N2807. During transcode, dashboard reports: QuickSync off = 14-17fps no distortion. QuickSync on = 60fps distortion.

 

In advanced transcoding section, I've tried all combinations of selecting/not selecting/prioritizing the 3 choices available for h.264: 1. QuickSync Intel HD Graphics - H.264 (AVC), 2. QuickSync Intel HD Graphics - D3D11 H.264 (AVC), and 3. DX11VA Intel HD Graphics - H.264 (AVC).

 

If the first one is not selected AND made the preferred codec, QuickSync does not work and falls back to software. If there's really only one choice that makes use of QuickSync, I don't know why the other two choices are available?

 

I've also tried all combinations of H264 preset speeds, Constant Rate Factor, throttling on/off, etc. and the results are the same.

 

If the player is set to full quality (1080p 60fps regardless of original content fps) then there is also no issue since there is no transcoding and video is just streaming original file. Results are same regardless of client, whether it's iPad, iPhone, or PC / local network or LTE so client/network does not matter.

 

Since others starting posting this issue last year (when Emby had builds enabling QuickSync) I will assume it will probably not be solved soon since ffmpeg is third-party and hard to duplicate due to variations in everyone's hardware. And because there are no actual errors being generated in the logfiles - only incorrectly processed video being piped out of ffmpeg.

 

So my question is - what file do we edit to change ffmpeg's settings (would be great to see this in the advanced codecs section in the future for troubleshooting purposes)? I'd gladly post any results if you point me in the right direction...

 

 

 

Hi there, can we please look at an example? Please attach the ffmpeg log. You can learn how to do that here:

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

Thanks.