Chroma/Color Bleed Issues In MPEG2-->XviD Conversion

[onesikgypo]

Hi,

I was hoping someone might be able to help me out. In trying to encode this clip of mine i have chroma issues coming through. The source is (4MB file): http://ge.tt/8XxPZR5

Using an ordinary TFM().TDecimate() i get a correct IVTC, but the result is a red color bleed: http://i56.tinypic.com/98vatd.png


Using a TFM(chroma=true).TDecimate() the red color bleed goes but then i get the grey (lack of colour): http://i54.tinypic.com/15hlset.png


Any assistance would be greatly appreciated. I am looking not only for a specific fix, but also a fix in general that can be applied arbitrarily to auto fix such issues, if such a fix is out there.

Thanks in advance.

[poisondeathray]

I can't reproduce your issues on your sample clip, chroma looks fine here on the same frame as in your screenshots

[onesikgypo]

Using an ordinary TFM().TDecimate() i get a correct IVTC, but the result is a red color bleed: http://i56.tinypic.com/98vatd.png

Using a TFM(chroma=true).TDecimate() the red color bleed goes but then i get the grey (lack of colour): http://i54.tinypic.com/15hlset.png

Perhaps your looking at the wrong frame, the relevant frame on the resulting xvid is frame 22 (on the source its frame 12950)

AVS Script:

 
LoadPlugin("PATH\TIVTC.dll")
DirectShowSource("PATH\badchroma.mpg", audio=false)
TFM().TDecimate()
LanczosResize(640,352)

(note i simply used DirectShowSource rather than mpeg2source and a d2v for ease - same issues arises)

[jagabo]

Both work fine for me:

Mpeg2Source("chromaissue.d2v", CPU=2)
TFM(d2v="chromaissue.d2v", chroma=true) # or false
TDecimate()

Do you have any colorspace conversions in your script? ConvertToYV12(), ConvertToYUY2(), ConvertToRGB()? If so you need to add "interlaced=true":

ConvertToYV12(interlaced=true)

[onesikgypo]

Both work fine for me:

Mpeg2Source("chromaissue.d2v", CPU=2)
TFM(d2v="chromaissue.d2v", chroma=true) # or false
TDecimate()

Do you have any colorspace conversions in your script? ConvertToYV12(), ConvertToYUY2(), ConvertToRGB()? If so you need to add "interlaced=true":

ConvertToYV12(interlaced=true)

Hi,

No there is no colorspace covnersions, script is as posted in the third post. Would you mind posting your frame 22 of the resulting xvid?

I have tried the coversion many times on at least 2 pc's which result in same error.

[poisondeathray]

perhaps you're getting the issue from using directshow

I can't reproduce it

The same frame is #21 using Mpeg2source

Mpeg2Source()
AssumeTFF()
TFM().TDecimate()
BicubicResize(640,356)

(I resized to 356, because your screenshots were 356, not 352)

[poisondeathray]

Try Mpeg2Source

Check your plugin versions, what version of TIVTC.dll are you using?

[jagabo]

Xvid avi of above script attached. An AVC/MKV at the original frame was added to my earlier post.

Maybe DirectShowSource() or your MPEG 2 decoder is screwing up -- delivering progressive chroma channels instead of interlaced.

[onesikgypo]

Hi All,

Given the amount of epople who couldnt reproduce it, and given that the scripts were similar i decided to upgrade everything. Upgraded DGIndex (whcih i knew was updated) and also TIVTC (which appeared to be the same version, but got v1.05 anyway) and the chroma issue got fixed.

Just goes to show you shoudl always keep up-to-date with the filters and tools

thanks everyone.