Premiere CS6 on Windows 7 makes QT 10-bit crazy in "Max Bit Depth"

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summary:

 

problem: 10-bit qt-cineform footage in premiere cs6 on windows 7 looked ok sequence in 8-bit mode crazy (mostly noise) when same sequence in "maximum bit depth" mode.

 

solution: re-wrap footage avi-cineform (or else use premiere cs5.5 or different nle).

 

detail:

 

this problem occured on 2 different machines, each running windows-7 (64-bit), each machine having different update-versions of premiere cs6.  problem absent when imported same footage cs5.5 (5.5.2, 003, mc 258762).

 

i recorded 10-bit footage sony ex3 camera via sdi quicktime (.mov) file containing video encoded in cineform (cfhd) 10-bit format.  recorder (a cinedeck) records qt, not avi.

 

in premiere cs6, footage looked expected when processed in 8-bit mode.  when same sequence had "maximum bit depth" setting enabled, image (from preview , render) appeared noise.  last thing 1 wants discover prior final render...

 

the same footage looked fine, 10 bits of information being used, both in earlier premiere cs5.5 , in sony vegas 12 (in equivalent mode, "32 bits, video levels").  verified "all 10 bits used" expanding levels-range (by increase in gamma , minimum level in fast color corrector) , inspecting result (for dark regions of image) in waveform (yc) monitor in reference window.

 

a "dit-craft" workaround:

convert footage qt avi, best achieved re-wrapping (not transcoding).  in case did via convert function of cineform tool hdlink.

 

conclusion:

 

cs6 on windows 7 doesn't qt containing 10-bit cineform, or maybe (i wonder) 10-bit anything?  quicktime version 7.7.2 on 1 machine , 7.7.3 on other.  latest version of qt 7.7.4 next tried updating 1 of machines made no difference.

 

questions:

 

can else confirm this?  happen in new "premiere pro cc" version?

following brief "moment" of (unjustified) doubt (but justified requirement verify),  seems "re-wrap work-around" does work, , hdlink does re-wrap provided its "force re-wrap" option enabled in cineform's hdlink (otherwise re-encodes 8-bits).

 

my issues niggling ones hdlink, in terms of mentioned setting-requirement , (repeatable) crash/freeze issue @ end of processing, requiring process-abort (from windows' task manager).  fortunately ugly state of affairs not appear harm generated avi file, other fail update windows explorer , file's accessed/modified timestamps @ end of processing.

 

in practice, avi file generated process found playable windows media player , importable premiere cs6, appeared expected in both 8-bit , "max bits" modes, latter receiving full 10 bits of levels information.

 

so problem solved!  verified!

 

just record, "moment of doubt" , resolution of it:

<<<

oops... need verify, time, whether workaround worked...

 

following overnight conversion, result seemed 8-bits.  view supported file-size reduction (39gb 31gb, proportion = 8/10) , 8-bit-like levels-banding when viewed on premiere's waveform/yc monitor on premiere cs6 test sequence in max bits mode.

 

...in case quick test suggesting re-wrapping had fixed problem in fact misleading, because not changing container (qt->avi) encoding , bit depth...  result of test neutral...

 

so re-try hdlink conversion, time hdlink's "force re-wrap" option selected in preferences.

 

<some time passes...>

 

this time, took 45 minutes complete , furthermore cpu (4-core) load tiny, 1 or 2%, opposed around 16% overnight "unwanted re-encode" process.  both of factors supportive of prospect re-wrapping indeed happening time...

 

then hdlink failed terminate properly.  after 30 further minutes, there no change, , no cpu load it, elected abort process.

 

the resulting avi file of same size qt original, interpreted correctly when premiere in "max bits mode" , verified containing useful 10 bits of information (via banding in premiere waveform/yc monitor, comparing , without "max bits mode") .

>>>

 

this "video detective" can hopefully "case closed", i'll "leave files open" few days more in case further issues show up.

 

regardless, still helpful hear of similar experiences or alternative solutions.



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