-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 On 19/05/15 16:50, Michael Niedermayer wrote: > On Tue, May 19, 2015 at 03:35:42PM +0100, tim nicholson wrote: >> -----BEGIN PGP SIGNED MESSAGE----- >> Hash: SHA1 >> >> On 19/05/15 14:11, Michael Niedermayer wrote: >>> On Tue, May 19, 2015 at 12:07:24PM +0100, tim nicholson wrote: >>>> On 19/05/15 01:33, Michael Niedermayer wrote: >>>>> [...] >>> the avchroma locations are explained by the ascii art above the enum : >>> * X X 3 4 X X are luma samples, >>> * 1 2 1-6 are possible chroma positions >>> * X X 5 6 X 0 is undefined/unknown position >>> >>> and from this the english directions are exactly where the chroma >>> samples are located, this also matches how H264 defines chroma >>> locations. >> >> I cannot get the ascii art to make sense to me at all, it just doesn' t >> click. I do no see how you can represent "co-siting" in ascii art wit h a >> single character and the "3" position certainly doesn't do it for me! > > ascii art improved > does it make sense now ? >
Better, but I still cannot see the difference between say 3 and 4, or 1 and 2. > [...] My understanding of S377 using 2/3 ascii chars/pixel is:- 00h:- YC Y- YC -Y- YC Y- YC -Y- YC Y- YC -Y- 01h:- Y- C- Y- C- Y- Y- C- Y- C- Y- Y- C- Y- C- Y- 03h:- Y- Y- - -- C- -- Y- Y- 05h:- YCr Y- YCr YCb Y- YCb YCr Y- YCr 06h:- Y- Y- Y- Y- C- C- C- C- Y- Y- Y- Y- Not all samples are retained dependening upon the subsampling scheme. - -- Tim. Key Fingerprint 38CF DB09 3ED0 F607 8B67 6CED 0C0B FC44 8B0B FC83 -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (GNU/Linux) iQEcBAEBAgAGBQJVXYdQAAoJEAwL/ESLC/yD0NMH/jTJYQG8ZLtwMKbDWAfvkUzk FWhWJxVQl3JBftxmjkB7JRtRebX6XbDklUi2OQplIzAhbqLdQIJHgDC8enYRIRBf FJE4qTPltyJ/taOuXeM1IGwrAdbXql+wIakQbwXYfu07dZ3fLAFk63u6mBx+pLeo l3JpVwOMQsxvjnnrrEr73mKlVk9vo99+tjJiBng5UR02SLfp/6Blvyl4HhyCMYZr WvZf/pKhETmxjhYMhM/tBncgzeA5gW6q7onFsdBM8g+n/nxSF/nQrXXlkWlWN4hN M4gnWwVddKbdmaP/kZBzJsIfKnEsH7em2rFOseMrmtvSImDZVpIpRFkG8pVe1JY= =9Pkq -----END PGP SIGNATURE----- _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
