Quicktime conversion problems

J

jpastuch

Carbonite Member
I used quicktime conversion to make a .mov file of my 7 minute film to upload to youtube. I shot in 24pA on DVX100 and used advanced pulldown when capturing.

For the conversion, I set everything to best quality and for a keyframe every 12 frames (I didn't have the time to set it for more keyframes). When it was done, the .mov played inconsistently jerky (it sometimes does it, sometimes not). On youtube it does the same thing but worse. It only seems to happen at the beginning of the movie though.

http://www.youtube.com/watch?v=VCC_JVkpzls

Can someone tell me what settings I did wrong? Does it looks choppy for you too or is it just my computer?
 
Best quality means NO COMPRESSION. Lowest quality mean maximum compression.

There is always a trade off between the amount of compression required for the bandwidth available and quality. The amount of compression QuickTime does for the codec you've chosen is governed by that slider which unfortunately has terrible labelling. It should be labelled as maximum and minimum compression not quality. Minimum being zero.

Try starting in the middle and then lower the compression setting, (towards the "Best Quality" setting until the bandwith can't handle the data rate).
 
I'm confused- so the .mov file can't handle it or something? If I do BEST quality and have no compression, shouldn't the file work even smoother?
 
It is possible that your data rate may have been too high. The higher the bit rate in compression the harder it can be to play back as the computer is processing huge numbers.

You also might have to add compression markers and/or increase your key frames, especially where there is high motion.


Jason
 
Try setting key frames to auto. Restrict the data rate to 800. Make the audio mono at 96 rate. Don't know what aspect ratio you shot it at but set it for an adequate viewing size rather than whatever the full frame source material was set at. Do a mutli-pass encoding for better quality.

BTW, I would run all of these settings through Compressor using H264 rather than using the QuickTime conversion drop down - I have had better results that way.

I hope things bring you closer to a satisfactory result.

Cheers
 
Unfortunately I can't get to the FCP file right now for various reasons.

In the meantime, I have a DVD of it (at DVD quality via DVD studio)- can I rip that and post it on youtube with just as good results?
 
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