Unexpected channel shifting

[atrukhin]

Hi devs, seeing the following issue with some movies

Sample: https://disk.yandex.ru/i/jtBikjNjLEG27w

It looks fine with web player

But in mpc-be with mpcvr it looks like some channel(s) are shifted (with vertical flip?) resulting in corrupted colors at the top

Using all latest mpc-be 1.7.1 and mpc-vr 0.8.1.2230 with SW decoding

Settings are:

[Aleksoid1978]

All is good for me.

[Aleksoid1978]

Input format is different, it's strange. Must be as on my screenshot.

[clsid2]

LAV Video shows 464x348 as input as well, but without DAR behind it. Playback is ok.

So he is using other decoder or maybe just old version.

[v0lt]

Try turning off Request Super Resolution. Try turning off RXT Video HDR. Try turning off NV12.

[atrukhin]

after digging more into this issue it turns out to be MPC video decoder issue not renderer:

• disabled NV12 but shifting still happens and even more noticable

• then disabled YV12 as well and it disappears

so if you still want to investigate/fix it i can reopen it in respective repo

[v0lt]

I didn't write anything about video decoder settings. We are discussing MPC Video Renderer. Right?

[atrukhin]

unfortunately tweaking renderer settings do not help i only could resolve it by disabling NV12/YV12 in decoder settings

[v0lt]

The difference is in the "Input Format" line. No frame cropping to 464x348. The external filter may be interfering.

Here is the list of my external filters (Play > Filters > Copy filter list to clipboard):

MPC-BE x64 1.7.1.2 dev
Filters currently loaded:
  - MPC Audio Renderer
  - MPC Video Renderer
  - Audio Switcher
  - MPC Video Decoder
  - MPC Audio Decoder
  - MPC FLV Source

[atrukhin]

mine are:

MPC-BE x64 1.7.1 Filters currently loaded:

• MPC Audio Renderer
• MPC Video Renderer
• Audio Switcher
• VapourSynth Filter
• MPC Audio Decoder
• MPC Video Decoder
• MPC FLV Source

I disabled VapourSynth Filter and it helped without any other settings tuned (enabled back everything disabled before in rendered/decoder)

so if it looks like VapourSynth Filter issue and nothing to investigate/fix in mpc decoder/renderer please close this one

and i will submit it to their repo

[v0lt]

MPC FLV Source reports that the frame is 464x352, which needs to be cropped to 464x348. Your VapourSynth Filter loses its cropping information and ends up with a color band.

LAV Splitter Source immediately reports that the frame is 464x348. Why there is such a difference in source filters is still unclear to me.

[atrukhin]

i replaced MPC FLV Source with LAV Splitter source and it also helps - i could keep VapourSynth enabled and no banding seen