Deinterlace problem (bug)?

alexcon314 · October 19, 2020, 2:52pm

Hi.

I’m using release

# R32 (release), REVISION: 2.3, GCID: 17644089, BOARD: t186ref, EABI: aarch64, DATE: Tue Nov 5 21:48:17 UTC 2019

Input video:

Stream #0:0[0x65]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(tv, top first), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 50 tbr, 90k tbn, 50 tbc

But some frames contain interlaced regions after transcoding, see attachment.

What could be the reasons for this behavior?

kayccc · October 19, 2020, 11:08pm

Please execute sudo jetson_clocks to see if can gain better result.

alexcon314 · October 20, 2020, 6:11am

Done.
sudo jetson_clocks
sudo jetson_clocks --show
SOC family:tegra186 Machine:quill
Online CPUs: 0-5
CPU Cluster Switching: Disabled
cpu0: Online=1 Governor=schedutil MinFreq=1420800 MaxFreq=1420800 CurrentFreq=1420800 IdleStates: C1=0 c7=0
cpu1: Online=1 Governor=schedutil MinFreq=1420800 MaxFreq=1420800 CurrentFreq=1420800 IdleStates: C1=0 c6=0 c7=0
cpu2: Online=1 Governor=schedutil MinFreq=1420800 MaxFreq=1420800 CurrentFreq=1420800 IdleStates: C1=0 c6=0 c7=0
cpu3: Online=1 Governor=schedutil MinFreq=1420800 MaxFreq=1420800 CurrentFreq=1420800 IdleStates: C1=0 c7=0
cpu4: Online=1 Governor=schedutil MinFreq=1420800 MaxFreq=1420800 CurrentFreq=1420800 IdleStates: C1=0 c7=0
cpu5: Online=1 Governor=schedutil MinFreq=1420800 MaxFreq=1420800 CurrentFreq=1420800 IdleStates: C1=0 c7=0
GPU MinFreq=1134750000 MaxFreq=1134750000 CurrentFreq=1134750000
EMC MinFreq=40800000 MaxFreq=1600000000 CurrentFreq=1600000000 FreqOverride=1
Fan: speed=255
NV Power Mode: MAXP_CORE_ALL

Unfortunately we have same result. Nothing changed.

DaneLLL · October 20, 2020, 9:32am

Hi,
It may be this known issue:

Please apply the patch for a try.

alexcon314 · October 20, 2020, 11:28am

Thank you for patch.

But i’m not using gstreamer. My app not have crashes or memory leaks. My app based on MM API.
I found an old topic with a similar problem - Deinterlacing problem in TX2

In that thread, you suggested a patch - Deinterlacing problem in TX2 - #15 by DaneLLL

Maybe there is something similar for my release?

DaneLLL · October 21, 2020, 2:26am

Hi,
The fix is for r28 release and cannot be applied to r32. Are you able to share steps so that we can reproduce the issue. Maybe a patch we can apply to 00_video_decode.

alexcon314 · October 23, 2020, 9:19am

I’m attaching h264 (3-part zip archive) dumped from original stream. 00_video_decode decode this file successfuly and produced ~1Gb file.

./video_decode H264 --disable-rendering -o ~/vod/1920.raw ~/vod/1920i50.h264

I don’t know how to check or upload this file for you. Please try decode attachment and send me result.

I’m checking raw file with http://rawpixels.net/ service, i’m also attaching screenshot.

1920.h264-001.zip (4 MB) 1920.h264-002.zip (4 MB) 1920.h264-003.zip (3.8 MB)

DaneLLL · October 25, 2020, 11:24pm

Hi,
So the issue is not seen by decoding it through 00_video_decoder. Only happens in your application?

alexcon314 · October 26, 2020, 5:51am

Hi.
The problem is reproduced with 00_video_decode. I’m attaching decoded file screenshot above.

DaneLLL · October 26, 2020, 7:57am

Hi,
It looks expected if an object is moving fast. The hardware filter may not be able to handle the case when the object is moving too fast.

alexcon314 · October 29, 2020, 7:34am

Hi.
It’s possible using yadif deinterlace engine for achieve better result? what alternatives can you suggest?

DaneLLL · November 12, 2020, 9:51am

Hi,
We don’t have experience in using software deinterlacing engine. Would need other users to share suggestion.