Video lag only on Shield

[podonnell 47]

I am getting video lag specifically on my SHIELD. Tried on other devices (chrome) without any issue. Confirmed direct play on audio and video during the lag.

The audio plays normally throughout, but the video seems to drop many frames and consistently is behind the audio feed.
Some codec info that matches on both videos that I saw the issue on:

4K AV1
AAC stereo
 

Let me know what other info I can provide to help diagnose.

[Luke 42077]

 

Hi there, let's look at an example. Please attach the information requested in how to report a media playback issue. Thanks!

 

[podonnell 47]

This should have the two playbacks captured. Virtual Insanity and Taurus are the two video titles that experienced the issue.
Both appeared healthy on the dashboard, but on SHIELD had what appeared to be a plethora of dropped frames -- however the SHIELD player does not display dropped frames in stats for nerds.log.txt

[Luke 42077]

Hi, are you still having an issue with this? If so, please attach the complete emby server log rather than a snippet. Thanks.

[Sparxle 11]

Unfortunately the shield is to old for 4k AV1. Unlike newer and much cheaper devices it does not support AV1 hardware decoding and has to rely on software decoding.

I usually recode AV1 videos I want to watch on the shield to HEVC manually.

[podonnell 47]

On 3/6/2025 at 10:47 AM, Sparxle said:

Unfortunately the shield is to old for 4k AV1. Unlike newer and much cheaper devices it does not support AV1 hardware decoding and has to rely on software decoding.

I usually recode AV1 videos I want to watch on the shield to HEVC manually.

Yeah this is definitely the issue.

Do you just use an ffmpeg command to do so?

[Luke 42077]

On 3/10/2025 at 4:43 PM, podonnell said:

Yeah this is definitely the issue.

Do you just use an ffmpeg command to do so?

The Emby Convert Media feature can help you convert it to a format that the Shield will  handle better:

Convert Media

[js28194 36]

To manually convert:

ffmpeg -i inputfilename.ext  -c:v libx265 -vtag hvc1 outputfilename.ext

To use NVENC hardware encoder you should add -vcodec hevc_nvenc before outputfilename.ext

So that command would look like:

ffmpeg -i inputfilename.ext  -c:v libx265 -vtag hvc1 -vcodec hevc_nvenc outputfilename.ext

P.S.

I have noticed some filesize differences using NVENC vs. straight intel CPU, YMMW