Is SheerVideo more accurate than DV or DV-25?
Yes. In contrast to SheerVideo, a perfect-fidelity codec with an error of 0.00 b/S (bits per sample), DV-25 is a DCT-based approximating codec that compresses by throwing away (hopefully) less-important information. Thus Apple’s DV codec has an average error of 3.75 b/S (bits per sample) for Y’CbCr 8bv 4:2:2, and 2.48 b/S for RGB 8b. For RGB 8b video, SheerVideo also compresses more than 5 times as fast as DV and decompresses nearly twice as fast as DV, and for Y’CbCr 8bv 4:2:2 video, SheerVideo compresses 8 times as fast as DV. Furthermore, in contrast to DV, SheerVideo supports alpha compression, Y’CbCr[A] 8bv 4:4:4, and RGB[A], and arbitrary resolution. On the other hand, DV is generally a more cost-effective solution for low-end standard-definition video production work.
