Is there any Difference between 720p60 or 720p30 data wise?

[DJDecay]

Originally Posted by Cranky

DJDecay, why you are excluding "special" frame rates like 720/30PN ? Does OnLocation NOT support this format?

I'm working on a DVCPRO stream recovery software, (when a copy of OnLocation, HD-Monitor and Others crash out during record) and was trying to see if with a missing quicktime container I could "guess" whether the stream was at 60p or 30p, I ran it twice against the same source and got both a 59.94 timed file @ duration 1 and a 29.97 file at duration 2 - as far as I know most folks are not able to record via firewire in anything but 720p30 or 720p60 - any of the special codecs are not supported, so the cam may run at 24P filmcam mode, but will send a p60 stream back. - As Barry pointed out, there is apparently a space saver mode in OnLocation which I have to look into as well. -

The tricky part is Quicktime sets duration in frames not in absolute time so between 30p and 60p its hard to tell If I've recovered/reindex all the frame headers or only half of them.

[DJDecay]

Originally Posted by Barry_Green

The actual bitrate used is dependent on the frame rate, because each and every frame is allocated the exact same amount of bandwidth.

DVCPRO50 uses two codecs ganged together, DVCPRO-HD uses 4. However, DVCPRO50 and DVCPRO-HD also get 4:2:2 color, so I'm not 100% sure how they use those 4 DV codecs in parallel, because DV in and of itself is 4:1:1.

This might give a clue - this is a screen-shot of the DVCPRO-HD stream falling apart,
you can see geometric correlation in distortion. This looks like a 5x5 block matrix at 720. Each one of these is further subdivided into 4x4 and further subdivided smaller blocks - So the checkerboard is really 20x20 @ 720 (divisible by 4.)