RPi5 lip sync issue

Free Man · May 16, 2024 at 5:34 PM

I've been having lip sync issues in all my videos for the last several weeks running nightlies on my Rpi5.

I see that there's now an official release of LE12.0 that supports RPi5, and in the release notes it addresses this:

Quote

RASPBERRY PI
50/60fps H264 HW decoding may need force_turbo=1 or core_freq_min=500 in config.txt to avoid AV-sync-issues/skipping

Now, for the dumbest of dumb questions: Where is this config.txt located so I can make these changes? I have rummaged all around the directory structure and don't see it. I would presume that it'd be in /configfiles, but I definitely don't see it there or in any of the subdirectories there. Do I simply create config.txt and add one of those lines since I don't have a config.txt?

powerarmour · May 16, 2024 at 5:46 PM

That config won't apply to RPi5 tbh, it doesn't have H264 HW decoding (only H265/HEVC).

**chewitt** · May 17, 2024 at 3:27 AM

Code

mount -o remount,rw /flash
nano /flash/config.txt

I have no issues with 1080p H264 and sync on an RPi5 (self-built nightlies) so I would make a random guess that you aren't using adjust-refresh and no mode whitelist is defined.

**Da Flex** · May 18, 2024 at 3:07 AM

Use advancedsettings.xml to delay the video output:

Code

<advancedsettings version="1.0">
	<video>
		<latency>
	    	<delay>YOUR_DELAY_IN_MILLISECONDS</delay>
		</latency>
	</video>
</advancedsettings>