Frame Per Second
Specifies the number of individual images shown every second. NTSC is generally the standard video format and is 29.97 fps. PAL is a European video format that is 25 fps. The standard for film is 24 fps. QuickTime movies are sometimes created with a slower frame rate to reduce bandwidth and CPU requirements.
Movies with higher frame rates display motion better, but have larger file sizes. If you choose a frame rate that’s lower than the movie’s current frame rate, frames are deleted. If you choose a number that’s higher than the movie’s current frame rate, existing frames are duplicated (not recommended, since it increases file size without improving quality). In most cases, your video will look better if you choose a number that your source fps is exactly divisible by. For example, if your source is captured at 30 fps, choose a frame rate of 10 or 15. Don’t choose a rate larger than that of your source material.
Key Frame Every
Specifies the key frame frequency. A higher key frame rate (lower number) improves video quality, but increases the file size. With some compressors, an additional key frame is inserted automatically if too much of the image has changed from one frame to the next. In general, one key frame every 5 seconds (multiply the frames per second by 5) is usually sufficient. If you are creating a file for RTSP streaming and have concerns about the reliability of the delivery network, you may want to increase key frame frequency to one key frame every 1 or 2 seconds.
Limit Data Rate To
Specifies the kilobits per second (kbps) during playback. A higher kbps rate usually improves movie playback quality; however, don’t choose a data rate higher than the available bandwidth.
Specifies the number of colors to include in video that you export. This menu is not available if the selected codec supports only one color depth.
If available, drag the slider or type a value to adjust the exported video’s picture quality and, consequently, its file size. If you are using the same codec to capture and export, and you’ve rendered previews of a sequence, you can save rendering time by matching the export quality setting with your original capture quality setting. Increasing quality above the original capture quality does not increase quality, but may result in longer rendering times.