Advanced Video Settings Dialog |
To adjust advanced Windows Media Format video settings, click the Advanced button on the Windows Media Services Encoder Template Wizard's Compression and Formats page.
Click the radio button that corresponds to the desired height and width of video encoded with the current template:
QCIF (Quarter Common Interface format) and CIF (Common Interface format) are predefined image standards. These standards are provided because their image size is a standard that is supported by many codecs and video editing tools.
The 160x130 and 320x240 options provide video windows that are slightly smaller than QCIF and CIF, respectively. The slight decrease in image size allows for more bandwidth to be used for video frames, and can improve content quality in some scenarios. Use these options if video sharpness is more important than video size for your content.
Click Custom and specify a height and width to define your own image size. When resizing a Windows Media Format stream with the Custom setting, be aware that many codecs require image size settings in multiples of 16.
Enter a value from 1 to 30 in the Frames/Second box to determine the number of video frames that wll be displayed in eack second of your encoded video.
The frame rate you choose is dependent on the type of video you are encoding and your target audience:
High-motion video requires a high frame rate to display smoothly; however, high frame rates produce large files and will not stream properly without a high-bandwidth network connection.
Low-motion video can be encoded with a low frame rate to decrease file size and produce files that can be viewed with relatively low-bandwidth network connections. However, high-motion video will appear disjointed with a low frame rate.
Enter a value from 0 to 30 in the Second/I-Frame box to determine the interval between I-Frames.
I-Frames contain all information required to display an image. Frames between I-frames are called delta frames, and they contain only the information used to display change. Delta frames are considerably smaller than I-frames; however, the visual quality of delta frames is poor.
As I-frames get farther apart, the size of the video (in bytes) gets smaller, but the video quality decreases. As I-frames get closer together, the size of the video gets larger, and the video quality increases.
Choose a setting from the Pixel Format to specify the color depth standard for encoded video.
The video card that the computer is using to receive the video source has certain color standards that it can display best, for example, RGBH = 64 thousand colors and RGBT = 16 million colors. For information about which pixel format works best with your video card, refer to the video cards documentation.
Enter a value from 1 to 10 in the Delay Buffer box to determine the number seconds of encoded video that will be buffered before playback begins.
Drag the Image Quality slider to fine-tune the image quality. You can emphasize either video smoothness or image crispness: video content is smooth when movement shown on the screen has easy transition from one position to another; content is crisp when the edges of objects are clearly delineated.