Green Pulsing Line - RPi4

ian_j · March 28, 2024 at 9:28 PM

When playing back the occasional video I get a flickering green line along the bottom of the screen.

If I turn hardware acceleration off the line disappears.

Is it just me or have others seen this issue?

**chewitt** · March 29, 2024 at 7:33 AM

On what LE version? - Logs? - Sample file?

LybsterKodi · March 29, 2024 at 8:36 AM

Whilst I agree with chewitt about the extra info needed I have seen this and I know exactly why in my case. I only see it on videos that have been initially recorded from TV to VCR tape, then from VCR tape to DVD then from DVD to HDD for Kodi.

ian_j · March 29, 2024 at 6:46 PM

Quote from chewitt

On what LE version? - Logs? - Sample file?

I'll get the info requested.

Quote from LybsterKodi

ian_j
Whilst I agree with chewitt about the extra info needed I have seen this and I know exactly why in my case. I only see it on videos that have been initially recorded from TV to VCR tape, then from VCR tape to DVD then from DVD to HDD for Kodi.

Ah, mine is only on PVR .ts files converted to .MKV

ian_j · April 10, 2024 at 6:07 PM

I have another file that causes the above issue.

What duration of video file should I post and where can I post it to?

EDIT: Kodi Log Uploader now found on repo.

I'm using the latest nightly build: LibreELEC-RPi4.aarch64-12.0-nightly-20240406-4b7642d

Here is my log file: https://paste.kodi.tv/xuzarejaqo

Video sample to follow as soon as I find somewhere to upload it.

ian_j · April 10, 2024 at 7:13 PM

Video sample: https://file.io/lWn8XxFByrLI

ian_j · April 12, 2024 at 7:19 PM

Is there anything else I need to provide to try and resolve this issue?

**HiassofT** · April 12, 2024 at 7:22 PM

No, and thanks for the sample, we could reproduce the issue (it's a known one) and also discovered another one

so long,

Hias

ian_j · April 12, 2024 at 8:08 PM

That's excellent thank you for the info.

Does this happen on Pi 5 too?

**HiassofT** · April 12, 2024 at 8:26 PM

No, this doesn't happen on the RPi5.

The green line is a bug in the HW-assisted deinterlacer (which only exists in RPi0-4) at 1080i. On RPi5 a software deinterlacer is used (and H264 is also software decoded).

In LE12 you can disable the HW deinterlacer and use a better quality software deinterlacer (BWDIF), but the combination of HW decoding and SW deinterlace caused a kodi crash with your sample file (that's the new issue we found and are investigating now, with our other test videos this combination worked fine).

so long,

Hias

ian_j · April 12, 2024 at 11:53 PM

Thank you for the info.

**popcornmix** · April 26, 2024 at 6:33 PM

A firmware has been pushed that should fix the green line issue.

It will hopefully appear in nightly builds in the near future.

If you are feeling bold, you could try downloading start4x.elf and fixup4x.dat and replace the existing start.elf/fixup.dat files on your sdcard.

ian_j · April 26, 2024 at 8:18 PM

That's excellent thank you for the heads up.

If I backup my originals of the files you linked to and I get major issues can I just copy over my originals again?

**HiassofT** · April 26, 2024 at 8:19 PM

Quote from ian_j

If I backup my originals of the files you linked to and I get major issues can I just copy over my originals again?

Yes, this will work

so long,

Hias

ian_j · April 26, 2024 at 8:20 PM

Excellent, I'll give a go over the weekend and report back.

Thank you.

**HiassofT** · May 6, 2024 at 9:35 AM

The updated firmware is now in the latest nightly build (20240505):
https://test.libreelec.tv/12.0/RPi/RPi4/LibreELEC-RPi4.aarch64-12.0-nightly-20240505-5087609.img.gz

Can you please give it a try?

so long,

Hias

ian_j · May 6, 2024 at 5:26 PM

I've been running it today & still noticed the green line flickering.

Do I need to change any settings in KODI?