Pro-Res darkens image?

G

gentaylor

Member
I just loaded 7D footage from an interview that I shot. First caveat: I screwed up the shutter speed. I was shooting at 30P and I accidentally left the shutter at 1/50. So the footage is jittery.

However, in the original H264 footage, the jittery movement is not terrible. And the lighting is good.

When I converted the footage to Pro-Res LT, the image become much more jittery and, for some reason, darker. Anyone else have this issue?

Anyone know a fix for jittery footage?

Thanks.
 

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i would double check your framerate, even manually entering them, make sure you have no presets for color or contrast settings, and make sure your field dominance is set to upper, turn off deinterlace.

if all those things are correct to begin with, give it a try in compressor and see if it produces the result. I typically get opposite results when transcoding to pro res LT, where my color, and gamma shift up, and then they come back down after i compress via quicktime conversion out of fcp.
 
The only thing I didn't do is to manually enter the frame rate. I'll try to enter this manually and/or try compressor. Thanks for your reply.
 
ProRes is a different colorspace than h.264. Changing colorspaces does a number of things for image reproduction, one of which is the darkened appearance.
 
also in my experience what you could be experiencing is the retention of highlights being brought back and resolved in pro res. try this on your shortest interview clip. transcode pro res, bring into fcp, convert using quicktime conversion back to pro res or h264. under your fcp settings make sure your gamma is set to 2.2. tell me what happens.
 
Also, where are you viewing and noticing the gamma shift?

If your noticing the shift in quicktime there is a "Enable Final Cut Studio color compatibility" option in the Quicktime preferences. Make sure that is checked.

I have not noticed any difference between h264 and the same file converted to ProRes playing back in Quicktime.
 
I am having the same issue. We're using a mix of ProRes LT footage in an 720x480 sequence. My solution was to output to photo-jpeg from the ProRes LT sequence straight out of Final Cut. I don't know what it is, but a lot of applications don't seem to like ProRes, especially when you try to transcode to Flash!
 
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