Checklist for Smooth Video Playback

General

Creating smooth video playback is a challenging task, where many factors interact. Video is a data flaw and every component must be able to match the current stream and do its task.

Content

The footage itself is important, too. You cannot smoothly playback a jerky video file. With 'objects' we mean visible objects in the video frames like eg. text letters.

Good:

1. Constant object motion
2. Slow object motion ( Without blur: max. 1-2 pixels per frame. This is very important for text scrolling. )
3. Objects with soft edges ( This is very important for text scrolling. )
4. Motion blur
5. Downscaling the footage in the output. Movements look smoother when they are minimized.

Bad

1. Jerky object movement
2. Fast object movement with hard edges and no motion blur
3. Upscaling the footage in the output. Movements look jerkier when they are maximized.

MXWendler Mediaserver

The settings are project-specific, so there is not general 'good' or 'bad'. But these settings and media facts have an influence on the video framerate

Check:

1. Is the vertical sync active?
2. Check for vertical sync in drivers, too.
3. Does the output window have the correct size? Sometimes setting 'unusual' sizes solves stuttering issues, please see Windows 7 + ATI + Stuttering Output or Windows 7 + ATI + Output Window On Wrong Screen
4. Does the framerate match the footage framerate?
5. Does the framerate match the footage framerate during playback? Check the framerate by moving the mouse to the left of the UI window, the current framerate will be visible in the bottom left of the window

Tip:

1. Lower the footage resolution ( Resolution is omportant. File size and clip length does not matter )
2. Lower the rendering size (Settings->Output Window->Rendering Size)