Premiere 5.5 playback jitter using HDTV 1080p preset

[Todd Kopriva]

What exactly do you mean by “jitter”?

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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
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[Mike Hinchey]

Any movement in the different shots are not fluid but move step by step. It looks very unnatural.

[Angelo Lorenzo]

Did you export to a faster framerate? If you did so without frame blending, Premiere will duplicate frames. Without seeing exactly what you have, that would be my initial guess.

Angelo Lorenzo
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[Mike Hinchey]

Thanks for your response. No actually its the opposite – the footage was shot and then processed in premiere at 24 fps – the Vimeo preset is 30 fps but is smooth but the HDTV 1080p 24 is not.

The file size on the Vimeo version is 250 MB and the HDTV is just under 1 GB and the latter has much higher bitrate settings. Could this be why its not playing back smooth? I would have thought my computer would have sufficient processing power to handle this though.

When looking at the picture the movement looks symptomatic of your description of duplicated frames but if the frame rate is consistent then that can’t be the problem right?

[Todd Kopriva]

Playback smoothness is not just about processing power. My guess is that the problem is your disk setup. If your system can’t feed the data from the disk fast enough, then you’ll get jerky, stuttery playback.

Playback of an H.264 stream won’t be as much of a problem in such a case, because that data is very heavily compressed, so there’s not a lot of information to read from the disk. (The burden in the case of H.264 is on the CPU.)

There’s information on optimizing disk setup here:
https://www.video2brain.com/en/videos-5353.htm

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Todd Kopriva, Adobe Systems Incorporated
Technical Support for professional video software
After Effects Help & Support
Premiere Pro Help & Support
———————————————————————————————————

[Mike Hinchey]

thanks Todd, pretty sure this is my problem. Much appreciated for your and everyone else’s help.