Chromecast with Google TV transcoding errors

Plex Players Streaming Devices
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On ~2022/11/24, I was using the Plex app for Chromecast with Google TV model GZRNL and I noticed that something had updated because navigating the UI started to make noises again and, ever since, I’ve been unable to play any videos that need to be transcoded due to error “An error occurred while attempting to play this video. Please check your connection and try again.”

On the server side, the following logs seem to be consistent:
“Nov 22, 2022 19:20:39.201 [20068] INFO - [Req#185/Transcode] [FFMPEG] - MFT name: ‘Microsoft AAC Audio Encoder MFT’
Nov 22, 2022 19:20:39.206 [20068] ERROR - [Req#185/Transcode] [FFMPEG] - could not find any MFT for the given media type
Nov 22, 2022 19:20:39.206 [20068] ERROR - [Req#185/Transcode] [FFMPEG] - could not create MFT
Nov 22, 2022 19:20:39.206 [20068] WARN - [Req#185/Transcode] Codecs: avcodec_open2 returned -40 for decoder ‘eac3_mf’
Nov 22, 2022 19:20:39.209 [20068] INFO - [Req#185/Transcode] [FFMPEG] - MFT name: ‘Microsoft AAC Audio Encoder MFT’
Nov 22, 2022 19:20:39.684 [20068] INFO - [Req#18b/Transcode/5fc51cf56e2803f6-com-plexapp-android] CodecManager: starting EAE at “\?\C:\Windows\system32\config\systemprofile\AppData\Local\Plex Media Server\Cache\Transcode\Sessions\EasyAudioEncoder”
Nov 22, 2022 19:20:42.367 [1420] WARN - Shell_NotifyIcon(NIM_ADD) failed: 0x0
Nov 22, 2022 19:20:42.877 [20068] WARN - [Req#1d1/Transcode] Got a request to stop a transcode session without a valid session GUID.”

(Weirdly, folder “C:\Windows\system32\config\systemprofile\AppData\Local\Plex Media Server” seems to not exist - “C:\Windows\System32\config\systemprofile\AppData\Local\Plex” does).

Playing the same video files on other devices that do support the EAC3 codec (iPhone, web app, etc) works fine.

Upgrading from version 1.29.1.6316 to version 1.30.0.6406 (latest as of writing) hasn’t made a difference.

The server’s transcoder settings are as follows (mostly default from what I can remember):

  • Transcoder quality: Automatic
  • Transcoder temporary directory:
  • Transcoder default throttle buffer: 60
  • Background transcoding x264 preset: Very fast
  • Enable HDR tone mapping: Ticked
  • Disable video stream transcoding: Unticked
  • Use hardware acceleration when available: Unticked
  • Use hardware-accelerated video encoding: Ticked
  • Maximum simultaneous video transcode: Unlimited

I noticed that, in folder “C:\Program Files (x86)\Plex\Plex Media Server\Resources\Profiles”, a lot of the files - including “Chromecast.xml” were modified on 2022/11/14 which is roughly the right timeframe, but this is odd because I manually update Plex and I last did so on 2022/10/22.

Can anyone help? Thanks.

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I also have problem after Android 12 update. I used to set the Audio Passthru on Optical and AC3 encoding. Now, it has problem direct playing any AC3 and DTS 7.2 audio movies. DTS 5.1 movies plays just fine. After setting Audio Passthru to HDMI, the AC3 movies are no playing fine (direct play), but DTS movies no longer play. So, I think the audio transcoding is the issue with Android 12 update.

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Yes, swapping Audio Passthrough from Optical to HDMI fixed it for me too!

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