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So What Do These Video Streams Mean In Practice?

Multitalented: All-in-One Graphic Boards
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We have translated the measured video streams into more understandable values. For one, we wanted to find out, how many Gigabytes of data were generated in an hour of recording. On the other hand, you can see the maximum length of a video (in minutes) that can be attained if you want to save your video onto a CD-R.

Low Resolution Stream (kB/s) Data capacity needed after 1 hour recording in Gigabytes Video length (minutes) possible on CD-R with 700 MB
3dfx MPEG2 305 1.0 GByte 39 min
ATI MPEG2 420 1.4 GByte 28 min
Asus ASV1-AVI 425 1.5 GByte 28 min
Matrox MJPEG LQ 715 2.5 GByte 16 min
Elsa MJPEG 822 2.8 GByte 14 min
Matrox MJPEG HQ 1425 4.9 GByte 8 min
High Resolution Stream (kB/s) Data capacity needed after 1 hour recording in Gigabytes Video length (minutes) possible on CD-R with 700 MB
ATI MPEG2 550 1.9 GByte 22 min
Asus ASV1-AVI 1333 4.6 GByte 9 min
Matrox MJPEG LQ 1585 5.4 GByte 8 min
Elsa MJPEG 1606 5.5 GByte 7 min
Matrox MJPEG HQ 2734 9.4 GByte 4 min
3dfx not possible      
pre-compressed Stream (kB/s) Data capacity needed after 1 hour recording in Gigabytes Video length (minutes) possible on CD-R with 700 MB
ATI 720x480 VCR2-AVI 113767 390.6 GByte 0 min
ATI 320x240 VCR2-AVI 36252 124.5 GByte 0 min

If you only intend to leave the videos on the hard disk, then full TV resolution is your best choice. This offers the best quality, however, you don't want to try this with a hard disk that has less than 10 GB space. If you want to make videos available to others later, then you can save these onto a CD-R. The suitable format should then have half the resolution. 3dfx's MPEG 2 solution seems to be best here. For ATI users, the preset for MPEG 2 (IBP frames) could be improved. Users who can afford to take the time to experiment with the settings can extract up to 45 minutes more.

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