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DelJo63
We are seeing lots of posts on issues of low or variable FPS rates being observed, so it begs the topic question.
Going to Microsoft's http://support.microsoft.com/kb/269068, we see these comments:
There are primarily three factors that affect the frame rate, and they are all interrelated:
Going to Microsoft's http://support.microsoft.com/kb/269068, we see these comments:
There are primarily three factors that affect the frame rate, and they are all interrelated:
- CPU: A general rule of thumb for this is the higher the frame rate, the higher the CPU requirement. For the Windows Media Encoder to keep up with the data that is being sent to it from the capture card, a fast CPU is required. To keep synchronized with the audio stream, the Encoder will start dropping video frames to keep up with the data input. When frames are dropped the Current FPS statistic is lower than the Expected FPS statistic on the monitor panel. Note that some capture cards are only able to capture at 15 FPS, while others are able to capture at the full 30 FPS. Consult your card's manufacturer for specific details about your card.
- Content Type: As stated previously, high-motion content requires more resources than low-motion video. Therefore, it is more important to properly select a CPU to handle the task, and to choose the right profile and key frame rate. If the encoding process cannot keep up with the content, it starts dropping frames. One exception to this is static content. If the content is a stationary object (such as a wall or an empty room), the frame rate may be lower because the Encoder does not need to capture any deltas.
- Selected Profile: Each profile has frame size and frame rate determined. If you select a profile that the Encoder cannot keep up with, then select a lower quality profile. Multiple Bitrate profiles can also affect the Encoder performance. If the Encoder starts dropping frames, you may need to remove a stream from the profile, or adjust the frame size.