Monday, June 3, 2013

[Avid-L2] H.264 Gamma Shift Adjustment Standards?

 

I appreciate I am likely beating a dead horse here, but I'm hoping
someone can't point me to a definitive link to my issue. I have searched
long and hard and all roads lead me to, well, other roads.
I am trying to compress a copy of my show for Vimeo. Vimeo requires the
H.264 codec. I export a copy of my show from MC 5.5.3 Same as Source. At
this stage I get, as you would expect, a QT that perfectly matches my
Avid cut for luma and chroma. I then have a choice on my system of
Compressor, MPEG Streamclip or QuickTime Pro to compress to H.264. All
three of these tools give me a sequence that is washed out: blacks,
whites and colors are all dull.
I've found and installed the X264 codec and tried it and I get a QT to
the other extreme: blacks crushed, whites blown out and colors
exaggerated.
Am I having this problem because none of these compressors are good
enough? Is there a successful workaround? As inelegant as it is, I would
be prepared to adjust the levels on my show before export, but how much?
Honestly, I'm not trying to get folks to repeat a conversation that's
been talked to death, but X264 was my last lead.
(Due diligence forced me to do one more search before hitting Send and I
came up with this
<http://byteful.com/blog/2010/07/how-to-fix-the-h264-gamma-brightness-bu\
g-in-quicktime/
> from July of 2010 regarding a Japanese version of
X264. Has anyone tried this? I will be.)
Any direction would be hugely appreciated,
Martin

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