playback jerks in canvas

[Olin Padilla]

Stock Creative Cow answer:

Transcode to ProRes. That’s what I’d do.

[David Roth weiss]

George,

First, why are you using JPEG2000 or Photo JPEG in the first place??? Both are legacy codecs (i.e. old and not fully supported in FCP).

[george sloan] “peg2OOO timeline with full bit rate. Will not playback in preview and plays jerky in canvas”

Are you saying that you raised the bitrate bar to 100% from 75%? If so, you should never do that. 75% is the highest with that codec, as 100% turns it to RGB, which is a mistake in FCP.

David Roth Weiss
Director/Editor/Colorist
David Weiss Productions, Inc.
Los Angeles
https://www.drwfilms.com

POST-PRODUCTION WITHOUT THE USUAL INSANITY ™

A forum host of Creative COW’s Business & Marketing and Apple Final Cut Pro forums. Formerly host of the Apple Final Cut Basics, Indie Film & Documentary, and Film History & Appreciations forums.

[George Sloan]

Thanks David,

What I meant was that i checked high precision in the video processing pane.

[George Sloan]

Thanks,
Why?
George

[George Sloan]

Thanks David,

What I meant was that i checked high precision in the video processing pane.
and the reason I use jpeg 2000 is because looks great? just finished a 30 minute project.
Was wondering why mega jerky in canvas and if there is a solution going forward?

[Walter Soyka]

[george sloan] “the reason I use jpeg 2000 is because looks great? just finished a 30 minute project. Was wondering why mega jerky in canvas and if there is a solution going forward?”

ProRes looks great, too. Working in ProRes is the solution going forward.

Your JPEG2000 playback may be stuttering because the data rate is too high for your drives to read in real time, or because the decode complexity is too high for your CPU to process in real time. JPEG2000 is a great delivery format for devices built for it — it’s the underpinning of digital cinema packages (DCP) — but there’s no reason to use as an intermediate format.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events

[George Sloan]

Thanks for a great response!

I have this:
using—FCP 7
Model Name: Mac Pro
Model Identifier: MacPro1,1
Processor Name: Dual-Core Intel Xeon
Processor Speed: 2.66 GHz….Camera…Cannon XHa1
Plenty of hardrives and memory

I have rerendered back to the original 1080i but need a little help with settings.
in FCP and compressor.
1. Do i change the settings to prores and render again using sequence settings?
2. Do i leave settings on highest precsion in the video processings?
3. What settings should i use in compressor?
4. Are there more than 1 ProRes codec…which one is Best.
5. Are you saying with adequate hardrive/processor and proper bitrate that JPEG2000 caused my jerky
playback in the Canvas?

Please advise me as to the best Quality workflow beginning with an important 30 minute project that has been shot and edited in 1O80i …then rendered (with compression markers) to ProReS

I have exported to quicktime conversion and the movie looks great but here this problem..

When compressing to DVD SD 4:3 either directly to compressor or QT then compressor. Need best results when played back as a dvd. (the 16:9 letter boxing and aspect ratio is perfect)…Need advice on workflow/settings starting with ProRes. to compressor

Thanks George Sloan sloanmotion.com

[Walter Soyka]

It sounds like you’ve got two questions — what’s the best HDV workflow, and what’s the best HD to SD downconversion workflow. Both of these are covered in depth on this forum.

Most folks recommend one of the following options: working in HDV, but setting renders to ProRes; working in a ProRes sequence (HDV will be a green bar, so you can work without rendering but will have to render for output), or working in HDV and then switching to ProRes at the end before output.

If working in a ProRes timeline, do not export using Quicktime conversion — just export a Quicktime movie using current settings.

Use regular ProRes 422. You will not get any additional benefit from using ProRes 422 HQ with your source footage.

For your downconvert, you can simply use Compressor’s DVD presets. If you need a 4:3 center cut, adjust the Crop settings.

Walter Soyka
Principal & Designer at Keen Live
Motion Graphics, Widescreen Events, Presentation Design, and Consulting
RenderBreak Blog – What I’m thinking when my workstation’s thinking
Creative Cow Forum Host: Live & Stage Events

[George Sloan]

THANK YOU WALTER!

Actually it was only one question and ypu answered it beautifully! I’ve been trying for days to
get any workflow question answered. I suppose in least in part because it envolved JPEG.
Thank you for speaking a language I can understand.

Perhaps we could talk again soon. Have a great day!

George Sloan Productions
https://www.sloanmotion.com