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Old 26th September 2015, 21:37   #1  |  Link
Music Fan
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Join Date: May 2009
Location: Belgium
Posts: 1,634
Strange color problem

Hi,
I have a video that has a strange problem with colors, it's especially visible on parts in movement.
But when I play this mpg with MPC-HC, this problem is not really visible.

IIRC, I recorded it a few years ago on TV with my Set-top box. Its HDD was crypted and the only way I had to transfer recordings was to capture by its analog output (Scart with S-video adaptator) with my Hauppauge card.

Thus I wonder if the problem comes from a bad encoding by the TV channel or if it was created when I captured it and was caused by the Set-top box or by my capture card.
I recorded in mpeg-2 @ 12Mbps in PAL system. That's supposed to be anamorphic 16/9 but I exported these jpeg in 720.576 with Virtual Dub.

Here is how it looks like without any filter (I tried FFVideoSource and LWLibavVideoSource, both give the same result, except the field order), click to see the real size ;



It's originally progressive but encoded interlaced.
It seems 2 fields of 2 successive frames are blended.
If I use tfm(), that's better, but another problem appears (the main problem actually) ;



I get the same result than tfm() if I remove the first field like this ;
Code:
separatefields().trim(1,0).weave()
And here is what happens when I separate fields, whatever I use tfm() before or not, these are 3 successive frames (or fields actually) ;







The chroma and luma move separately
How to fix this ?
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