garageCube

[stuart]

My logical record output movies have stutters in them. I should be seeing smooth animation. Any way to fix this?

[boris]

Can you elaborate a little bit ?
What exactly (auto animate, trace, fading, movie, etc..) ?
And what framerate,size and codec do you use for your rendering ?

Thanks...

[boris]

And also (of course) what is your configuration (os, cpu, memory, etc...) ?

[jm302]

Can you elaborate a little bit ?

You bet:

I rendered a couple hours worth of material these past two weeks and here's what I noticed:

•The more pixel effects used per layer, the worse the stuttering becomes(seems to obviously indicate the limits of your machine).
•When adjusting a knob or slider(via MIDI, mouse or module), the playback would stutter a bit(noticed this most when using the Particle Fountain, but also when using Lumakey and Trace together–2 to 3 layers max).
•Setting the laptop res to 1024x768 (unstretched) seems improve performance a little bit.
•Not using a second monitor or output device helps ALOT.
•Reducing the display window to be as small as possible when performing the initial record helps ALOT.
•If stuttering got bad, a restart of M8 usually cured it (noticed this most when using 640x480 JPEGs in the Particle Fountain).

Specs:

G4 Powerbook
1.25Ghz
1.25GB RAM
40GB free space on OS drive
clips are generally 10-15 seconds, 320x240 Photo JPEG 75%
clips live on LaCie 200GB FW800 drive and are usually fully loaded into RAM

The clips I rendered out of M8 were 640x480 and usually 1 to 2 mins. Following the above advice made them come out rather nice.

Cheers,
Justin

[stuart]

Well, I did a test and stripped my output down to 1 single 640x480 PJPEG movie playing back without and effects/transforms/processing of any kind. In other words, simple single movie playback. I then rendered a logical record with High/High settings at 25fps (the rate of the original file) and when played back the movie stutters. I checked the rendered file frame by frame to confirm it was the render and not playback performance.

I am on a iMac 1.8ghz G5 with 2 gigs of ram on 10.3.

[VJ_JeSs]

Ok I have the same problem
Powerbook 1,5ghz 512 ram / clips on internal harddrive.

The bug :
The rendered video clip (fonction --> render logical record) stutters. By checking the rendered video file frame by frame i realized that some frames are rendered twice. It happens every 3 to 15 frames. To give a better idea, if each letter is a different frame this is what the video could look like :
A B C D D E F G H I J K L L M N O P Q R S T T U V W X X Y Z
Resulting in a stuttering output video.

So I did various test :
- It doesn't seem to have anything to do with codecs (or codec settings)
- Nor with video render size
- I also tried rendering at higher frame rates (egg : 50/s) but I just get 3 identical frames in row when the bug happens instead of 2.

If I render a layer moving with automove the bug doesn't happen. But if this layer contains a clip, the clip will stutter even if the animation of the layer doesn't.
I hope this is clear, any openGL animation will stay smooth. Its only the playback of a video clip in the composition that stutters.
Just for extra info, the bug also happens with airport and bluethooth disapled (you never know )
Good luck, really hope you could trace down this bug before the next update. This function in modul8 is really unique. But it this state its unusable.

[yves@garagecube]

We identified the problem and are working on it. We plan to fix it for the next minor release.

[stuart]

Merci!

[VJ_JeSs]

great news