Compression

Compression can help you save lots of hard drive space. To change recording data rate, click Setup and then Compression tab. The quality of your recorded screen images can be affected by the amount of motion that occurs during the recording process. For high-motion content or 640x480 resolution you can select higher data rate to have better video quality.

Video Codec
NetCamCenter provides several choices of compression codecs. Please refer to codec comparison chart to select the codec.



Note:
1. Native camera's compression is available when connecting to MPEG4 and H.264 camera. If NetCamCenter detects that the camera is not using MPEG4 or H.264 codec, NetCamCenter will not display this option. (Note: Audio is not supported for MPEG4 and H.264 Windows Media streaming.)

2. If the video is recorded with Webcam Corp NVC2, H.264 or MPEG4 codecs to playback the video or view the live streaming video, you need to install the codec.

Advanced compression settings
Advanced compression settings only available when you select Windows Media video as video codec. To enable this function, check Enable advanced compression settings. (This feature doesn't apply to video recorded by motion )
  • Key frame interval
    Set the key frame interval.


  • Video smoothness
    Enter 1 to 100 to set the video smoothness.


  • Video size
    You can set the video size here. For example, enter 640x480 or 704x480.


Compression data rate
You can calculate video file size by referring to the following table. The video file produced by NetCamCenter is highly optimized for streaming. Your connection speed will influence the smoothness of your video if you view the video from the Internet.

Desired recording and broadcasting frame rate
You can enter the desired frame rate for recording and viewing by Windows Media Streaming. Note:
  1. The following table is for reference only. The actual file size may vary depending on the video content and frame rate.


  2. If Native camera's compression is selected, this option is disabled.


    3. Compression ratio if select Windows Media encoding
    160 kbps  960 KB/min, 56 MB/hr, 1.35 GB/day
    256 kbps  1440 KB/min, 86 MB/hr, 2 GB/day
    384 kbps 2 MB/min, 129 MB/hr, 3 GB/day
    512 kbps  4 MB/min, 229 MB/hr, 6 GB/day
    768 kbps  6 MB/min, 337 MB/hr, 8 GB/day
    1000 kbps 8 MB/min, 450 MB/hr, 11 GB/day
    1500 kbps 11 MB/min, 632 MB/hr, 15 GB/day
    2000 kbps  15 MB/min, 895 MB/hr, 21 GB/day
    3000 kbps  22 MB/min, 1.3 GB/hr, 32 GB/day
    4000 kbps 30 MB/min, 1.7 GB/hr, 41 GB/day
    5000 kbps  38 MB/min, 2.1 GB/hr, 51 GB/day
    6000 kbps  45 MB/min, 2.6 GB/hr, 62 GB/day
    7000 kbps  51 MB/min, 3.0 GB/hr, 72 GB/day
    8000 kbps  59 MB/min, 3.4 GB/hr, 82 GB/day
    12 Mbps  89 MB/min, 5.1 GB/hr, 123 GB/day
    16 Mbps  118 MB/min, 6.8 GB/hr, 164 GB/day

    Note: Lower data rate makes the file size smaller, but lowers the video/audio quality. Higher data rate produce high quality video/audio but increases the file size.