Old 12-27-2018, 12:49 PM   #1
daxliniere
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Default BUG: YUV decode

I exported a video to YUV lossless. Upon importing that video into REAPER, red and blue channels are swapped. VLC won't play the file, but Windows Media Player does and plays it correctly, so it seems that REAPER's decode is at fault.

(Or rename it to "Alternate reality filter" )




(BTW, since it's 2019, would you consider relaxing the 800x600, <64kb attachment restriction? ;P )
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Last edited by daxliniere; 05-24-2019 at 12:51 PM.
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Old 12-28-2018, 03:31 AM   #2
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I think its VideoLan's fault as their VLC is used in Reaper as decoder. You could install ffmpeg and use it as alternative decoder to check if its really VLC dependent.

I also had found a bug in VLC as I wasn't able to create video loops because the last frames always got stuck. That was reason enough to write several bug reports at the Blender bugtracker until I had realized its VLCs fault. Then I "spammed" VideoLan's bugtracker. Hope they fix this in the next release.

So its always good to have an alternative decoder like ffmpeg to find the root of the problem.

Here you can download ffmepeg: https://ffmpeg.zeranoe.com/builds/

Not sure which system you have. But you have to download the "shared" package. Put those dlls into Reapers user plugins directory and change the decoder priority in the user preferences.

Good luck!
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Old 12-28-2018, 04:07 AM   #3
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Can you show us the source properties (Ctrl+F2) for this file?

What R version?

Might need to post a minimal version of the file if you want it fixed...
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Old 12-28-2018, 09:27 AM   #4
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R = dev1219

--------------------------------------------------
Length: 0:02.135
Video: 640x480@29.97fps, Aspect=1.00, Decoding format=RGB
Audio: 44100Hz 2ch 16bps

Using VLC decoder (v3.0.x)
Video: 640x480, HFYU, 29.97fps
Audio: 44100hz, 16bps, 2ch, s16l

Loaded from: C:\Program Files\Video\VLC 2
--------------------------------------------------

Video is here: https://drive.google.com/open?id=1__...5-ry2qg007i4VP


I don't really need it fixed as I found a workaround, but thought I'd report this.
(BTW, DV codec doesn't even encode; "Error initializing video encoder, check parameters")
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Old 12-28-2018, 09:44 AM   #5
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As expected. This is VLC's fault as ffmpeg decodes the video easily.

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Old 12-28-2018, 10:08 AM   #6
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Cool, so I'll just swap ffmpeg and vlc, then? Is ffmpeg always preferred?
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Old 12-28-2018, 10:18 AM   #7
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Ahh, ffmpeg is really slow to decode any file type on my system.
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Old 12-28-2018, 11:43 AM   #8
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This depends kind of the system because some users prefer ffmpeg others VLC. I use ffmpeg only because of the mentioned last frame bug from VLC.
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Old 12-31-2018, 04:14 PM   #9
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Fixing (our fault)
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Old 12-31-2018, 06:54 PM   #10
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How could this be? The video didn't even run in VLC.
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Old 12-31-2018, 07:10 PM   #11
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Quote:
Originally Posted by Eliseat View Post
How could this be? The video didn't even run in VLC.
Looks like a bug in VLC 3.x -- 2.2 plays the video...
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