Hello,
AB:=Andrea Barbieri
AB> Hello,
AB>
AB> BW:=Ben Waggoner
AB>
AB> BW> So, as part of my Stanford class, we did some .mov and .mp4
AB> BW> files via Episode using H.264 High Profile, and the 4:2:0 ones
AB> BW> worked in QuickTime! Not the 4:2:2 ones.
AB> BW>
AB> BW>
AB> BW>
AB> BW> Was High Profile decode added in QuickTime 7.2?
AB>
AB> compared to Main, High introduces:
AB> - Monochrome Video Format (4:0:0)
AB> - 8x8 vs 4x4 Transform Adaptivity
AB> - Quantization Scaling Matrices
AB> - Separate Cb and Cr QP control
AB>
AB> What features is Episode using when selecting the H264 High Profile?
AB>
AB> 8x8?
AB>
AB> CABAC still a no go for QT H264 codec?
AB>
after some tests using x264 (rev 671), the QT 7.2 H264 decoder accepts
without any troubles a High Profile video track using:
- 8x8 vs 4x4 Transform Adaptivity
- Quantization Scaling Matrices (tested using the JVT Matrix)
- CABAC
- B-Pyramid
regards,
andrea
--
Andrea Barbieri
Moving Image Research http://www.movingimageresearch.com/
The Workshop, Hampton Lane, Bristol, BS6 6LE, UK
Tel: +44 117 9732200 FAX: +44 117 9732210
PGP ID=0x034DFD5A KeyFingerprint=C168EA9A7189538D214F1281A7529F32034DFD5A
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