Before you playblast, be aware of the following issues and known limitations:
If an open window obscures the area where the screen will be grabbed, the first frame of your movie will display part of the window. This can also occur when a screensaver appears partway through playblasting a long animation.
The Encoding drop-down updates automatically with associated codecs.
The scene plays in the active view for the playback range in the Time Slider. After each time frame is drawn, Maya takes a screen grab of the active view.
Depending on your platform and which output Format you selected, a new window opens and previews the playblasted animation. For more information, see Window > Playblast.
If you set a sound file (or files) to display in the Time Slider while Playblast is running, and you select a movie file type as the output Format, the sounds are included in the resulting saved movie file. See Display audio on the Time Slider.
To output single frames of your animation to Playblast
playblast -frame 1 -frame 4 -frame 7
outputs frames 1, 4, and 7 of your current animation to Playblast.
For more information, see Help > MEL Command Reference.
To run Playblast when Maya is minimized on your screen (Linux only)
For more information, see Help > MEL Command Reference.