Playback speed doesn't change

[DC-Modding]

Describe the bug

1. Start playing any media
2. Click on "playback speed" setting
3. Select any setting (0.25x-2.00x)

The playback speed doesn't change. Doesn't matter if you select slower or faster

Logs

No response

FFmpeg logs

No response

Media info of the file

No response

Application version

0.17.2

Device information

Zidoo Z9X pro

Android version

Android 11

Jellyfin server version

10.9.9

[FunctionDJ]

I feel like it's a recent regression. I almost always watch at 1.25x and only noticed today that the setting stopped working. It was working a couple of days ago. Not sure when my app updated (Play Store).

Currently installed (playback speed broken): 0.17.4
Server version: 10.9.9
Device: NVIDIA Shield Pro 2019

Edit: Downgrading to 0.17.1 didn't fix the issue for me. Mysterious.

[DC-Modding]

Think it broke with the 0.17 update from 0.16.x
At least I noticed it right after it.

[FunctionDJ]

@DC-Modding Downgrading to 0.16.11 didn't fix the issue for me.

[Kuphi]

Duplicate of #2367
Maybe reopen #2367, because it has not been resolved so far.

Actually also a duplicate of #1517 which was closed because it is an issue of exoplayer. Maybe it is still possible to find a fix for this within jellyfin-androidtv.

[Kuphi]

I was able to change the playback speed by building jellyfin-androidtv from master branch. This gave me a new option in the settings in the jellyfin-androidtv app:
Settings -> Developer Settings -> "Prefer FFmpeg for audio playback" (check the box)

--> This might already be the solution for some devices

But due to circumstances of Amazon Fire TV Sticks, this led to another problem:

"Interestingly, once the frames are "late" (=the presentation time is in the past), the decoder is suddenly able to quickly release all decoded frames, so that no frames are actually dropped, but you get this jerky, jumpy movements in regular intervals."

@tonihei posted a solution two years ago, at least for Amazon Fire TV Sticks:
google/ExoPlayer#9773 (comment)

If anyone can help to transfer this solution to jellyfin-androidtv that would be great.

[nielsvanvelzen]

Don't bother upstream developers. This is not appreciated.

[Kuphi]

Don't bother upstream developers. This is not appreciated.

I'm genuinely trying to contribute to solving this issue, but I find your comment a bit difficult to understand. Could you clarify your point?

From my understanding, the original playback speed issue at #1517 (comment) was closed because it's related to upstream developers (ExoPlayer). If that's the case, wouldn't it be necessary to address the problem there? If not, I’d appreciate some guidance on the best course of action.

[FunctionDJ]

I was able to fix the issue for me (at least temporarily) by either changing the preferred player to LibVLC, changing the Audiooutput to Mixdown Stereo (from Direct) or disabling DTS Audio Bitstream.

I'm wording it so weird because i changed all three settings (but then immediately changed player back to ExoPlayer), then force stopped the app, opened it, and the issue was fixed, but then afterwards i tried resetting the other two settings and the issue still doesn't come up even though all settings are exactly as before as far as i can tell.

So i'm not able to pinpoint exactly which setting fixed the issue for me, but maybe this info helps someone else.

[w1nwin]

All I did was change "Audio output" to "Downmix to stereo" and it worked again.