V-MPEG4 video rendering broken

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V-MPEG4 video rendering broken

Post by tt_1111 on Sun Jul 17, 2016 7:49 am

Lately I can't play *.mkv certain files with V-MPEG4 codec correctly.

The screen is kind of split into an overlay of three images, each covering approximately 1/3 of the screen.

I've already tried:
• Running the fix within the codec tweak tool
• Uninstalling K-Lite completely and reinstalling it
• Switching splitters for files of type *.mkv / *.mp(e)g / *.mp4

To no avail, the video remains 'shredded'.

I noticed this two weaks ago or so. Beforehand I didn't have any problems with that kind of video. Thus it probably is a change introduced with one of the latest versions.

Other videos with nearly the same codec funny enough still can be played within MPC-HC.

All videos play fine within VLC media player.

I've attached screenshots of 'Video shredded', 'Video Okay' and 'MPC-HC' (for shredded video) to show details.

Anyone any idea??!?




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Re: V-MPEG4 video rendering broken

Post by Admin on Sun Jul 17, 2016 8:48 am

I have downloaded the first part of that file that looks shredded for you. It plays fine here.

The problem is probably related to the fact that the video has a height (494) that is not nicely dividable by 4.

MPC menu > Play > Filters > Copy filters list
Copy the list here, so I can see if anything is wrong.

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Re: V-MPEG4 video rendering broken

Post by tt_1111 on Sun Jul 17, 2016 9:09 am

Here we go —

Filters currently loaded:
- Default DirectSound Device
- Enhanced Video Renderer (custom presenter)
- Audio Switcher
- ffdshow Video Decoder
- ffdshow Audio Decoder
- LAV Video Decoder (internal)
- LAV Audio Decoder
- LAV Splitter Source

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Re: V-MPEG4 video rendering broken

Post by Admin on Sun Jul 17, 2016 9:20 am

Open the settings of ffdshow video decoder. At the bottom of the "Codecs" page set 'raw video" to disabled.

If you actually require ffdshow for certain functionality, then alternatively you can try enabling its Resize filter and set it to expand the size to a multiple of 16. Also move the filter above any other processing filter that you are using in ffdshow.

Which settings are you using in ffdshow? Then I can try to reproduce and maybe help even better.

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Re: V-MPEG4 video rendering broken

Post by tt_1111 on Sun Jul 17, 2016 9:47 am

Hi, thanks for your fast reply.

I've disabled ffdshow completely now, the non mod 4 height videos unfortunately still are shredded.

New filter list:
Filters currently loaded:
- Default DirectSound Device
- Enhanced Video Renderer (custom presenter)
- Audio Switcher
- LAV Video Decoder (internal)
- LAV Audio Decoder
- LAV Splitter Source

I havn't found any settings in the LAV video decoder affecting this weird behaviour.

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Re: V-MPEG4 video rendering broken

Post by Admin on Sun Jul 17, 2016 9:54 am

Which graphics card do you have? You may need to update the driver.

If you don't know:
Codec Tweak Tool > Generate Log
That contains details about your hardware.

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Re: V-MPEG4 video rendering broken

Post by tt_1111 on Sun Jul 17, 2016 10:13 am

Screen size:  3840x2160 (32bits) (30Hz)
Video card:   AMD Radeon R9 200 Series
             VendorID: 1002, DeviceID: 67b1
Video mem:    4096 MB
Video driver: aticfx64.dll - Catalyst 15.8

Currently I've installed Catalyst 16.6.2 WHQL. Just downloading 16.7.2.

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Re: V-MPEG4 video rendering broken

Post by Admin on Sun Jul 17, 2016 10:30 am

In case you are using hardware acceleration, try disabling that.

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Re: V-MPEG4 video rendering broken

Post by tt_1111 on Sun Jul 17, 2016 11:35 am

Switching off Hardware acceleration has no effect, too ...

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Re: V-MPEG4 video rendering broken

Post by Admin on Mon Jul 18, 2016 2:02 am

MPC-HC options > External filters > Add "ffdshow raw video filter" and set it as preferred
Double-click on it to access its settings. Enable "resize & aspect" and set it to expand to multiple of 16.

Does that fix the problem? Then we at least know the size it the cause.

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Re: V-MPEG4 video rendering broken

Post by tt_1111 on Mon Jul 18, 2016 3:46 am

Yes, perfect image with two tested files with non mod 4 height. Looks like LAV could stand such a tweak, too.

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Re: V-MPEG4 video rendering broken

Post by Admin on Tue Jul 19, 2016 12:09 am

It does not have such tweaks (nor will it get it) because this is not a normal situation. The driver should normally be able to handle all sizes.

Another tweak that you could try is to disable YV12/NV12 in LAV Video Decoder.

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Re: V-MPEG4 video rendering broken

Post by tt_1111 on Tue Jul 19, 2016 3:22 am

Disabling YV12/NV12 in LAV works, even with hardware acc. enabled. Thanks!

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Re: V-MPEG4 video rendering broken

Post by Admin on Wed Jul 20, 2016 12:25 am

Great!

Could you test it again in the future after updating drivers? I would like to know if AMD has fixed it on not. Always useful to know in case others show up with similar problems.

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Re: V-MPEG4 video rendering broken

Post by tt_1111 on Wed Jul 20, 2016 12:56 am

Okay, but that will have to wait a month or so. The problem was still present with AMD driver 16.7.2.

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Re: V-MPEG4 video rendering broken

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