24p footage seems jerky to me/ not talking about CMOS jello

S

steve witt

Member
My first time messing with the Canon 7D video. I've been shooting in 24p and viewing the footage back on the computer both straight from the card, and clips that I have downloaded to my hard drive. I executed very slow and smooth pans and slides on my slider when shooting... but on computer playback, it does not look so smooth. The motion appears jerky like it is taking short even hops during the camera moves. Am I doing something wrong or is this just the way it is on computer playback?
 
Processor speed, amount of RAM, video card. All these things (and more) can affect playback speed of native H.264 files.
 
Well, now I've noticed that if I playback on Windows Media Player, it looks as smooth as it should. My computer is New and Powerful. 3GB system memory, NVIDIA GeForce 7100 Graphics, Dual Core Processor E2200 (I don't know how to look up the speed)
 
Edit........I will now add that it definitely only does the complaint described when I play it back on the QuickTime player :-(
 
shutter speed

shutter speed

make sure you shutter speed is 50.. and the type of lenses that you use matter,,
 
yeh this happens to me also with Quicktime. How does one use Media player to view 7d files though. when i put it in media player it will tell me the file format is not supported or not recognized(or something like that). Do you have to download something else in order to view them in WMP?
 
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steve witt said:
does anyone know why this would happen when playing on a PC version of Quicktime?
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Because h.264 isn't gpu accellerated on Quicktime windows (or at least not to an extent where it matches other directshow enabled players) and your cpu is rather slow to be handling all of the decoding. E2200 = 2.2Ghz/800mhz fsb & 512k cache per core.
 
steve witt said:
Well, now I've noticed that if I playback on Windows Media Player, it looks as smooth as it should. My computer is New and Powerful. 3GB system memory, NVIDIA GeForce 7100 Graphics, Dual Core Processor E2200 (I don't know how to look up the speed)
Click to expand...

That's definitely not a fast computer for playing native H.264 files, matter of fact it's very slow. You need to look into a Quad core computer or at least the new i3 processor (2 physical cores + 2 virtual cores desktop) computer with 4gbs of ram. Also you need to be using a 64bit operating system to take full advantage as well.
 
life4eva said:
That's definitely not a fast computer for playing native H.264 files, matter of fact it's very slow. You need to look into a Quad core computer or at least the new i3 processor (2 physical cores + 2 virtual cores desktop) computer with 4gbs of ram. Also you need to be using a 64bit operating system to take full advantage as well.
Click to expand...

^this is your answer. I cannot play from-camera H.264 files from my 7D on my PC. I have to transcode it to something like DNxHD.

I also use MPEG Streamclip to play back raw and transcoded files, and there is skipping with the former but seamless playing with the latter. I've had problems with Windows Media Player and Quicktime playing raw files.
 
The files on my harddrive have been imported and transcoded with the Cineform NeoScene, and WMP plays it the same as it does straight off the card, (SMOOTHLY). It only seems to be a problem when I try to play it back with the Quicktime player (from the CF card or HardDrive). This is disappointing because I want to eventually get a MacBook Pro and people have always had good things to say about Apple products. What gives?

Also, my PC has Windows Vista Home Premium (64-bit edition with service pack 1). Not sure if this helps/hurts either way.
 
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