On Thu, Dec 04, 2014 at 04:03:00PM +0000, tim nicholson wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA1 > > On 04/12/14 08:24, tim nicholson wrote: > > On 02/12/14 17:13, Michael Niedermayer wrote: > >> On Tue, Dec 02, 2014 at 05:02:49PM +0000, tim nicholson wrote: > >>> On 02/12/14 15:33, Michael Niedermayer wrote: > >>>> Signed-off-by: Michael Niedermayer <michae...@gmx.at> > >>>> --- > >>>> doc/filters.texi | 131 > >>>> ++++++++++++++++++++++++++++++++++++++++++++++++++++++ > >>>> 1 file changed, 131 insertions(+) > >>>> > >>>> diff --git a/doc/filters.texi b/doc/filters.texi > >>>> index 8c16c7a..0ea3955 100644 > >>>> --- a/doc/filters.texi > >>>> +++ b/doc/filters.texi > >>>> @@ -8537,33 +8537,164 @@ Available values are: > >>>> @item merge, 0 > >>>> Move odd frames into the upper field, even into the lower field, > >>>> generating a double height frame at half frame rate. > >>>> +@example > >>>> + ------> time > >>>> +Input: > >>>> +Frame 1 Frame 2 Frame 3 Frame 4 > >>>> + > >>>> +11111 22222 33333 44444 > >>>> +11111 22222 33333 44444 > >>>> +11111 22222 33333 44444 > >>>> +11111 22222 33333 44444 > >>>> + > >>>> +Output: > >>>> +11111 33333 > >>>> +22222 44444 > >>>> +11111 33333 > >>>> +22222 44444 > >>>> +11111 33333 > >>>> +22222 44444 > >>>> +11111 33333 > >>>> +22222 44444 > >>>> [..] > >>> > >>> I find the ascii graphic style of the interlace filter more > >>> understandable.... > > > >> how do you suggest above (and the other modes) would be documented > >> in that style ? > > > > > > Sorry for the delayed reply ISP issue... > > > > I think the main difference is going left to right, not top to bottom > > for input to output, this then matches not only interlace but the > > general filtergraph descriptions. > > > > I will try and see if I can give an example if you like. > > > > Attached, follows style of existing interlace filter ascii art. > > > > >> [...] > > - -- > Tim. > Key Fingerprint 38CF DB09 3ED0 F607 8B67 6CED 0C0B FC44 8B0B FC83 > -----BEGIN PGP SIGNATURE----- > Version: GnuPG v2 > > iQEcBAEBAgAGBQJUgIWzAAoJEAwL/ESLC/yDGVMIAL/B/xLvAMPYUUW63RHxTiCP > XQpKYKtfsFR6+QaC+pql1WSl8mYvlFRJUYLOm6ESd9JS72gLv6UTs1rLdITKaRdo > SkSVLBWiVAdY8nzjNESjxWnolelM1JzcEopnfqT1hcxeGnyAx+IMHBd3pW0+r/6U > F1BSnTM3yCELBvS/t7d4ZlpZkw4IDO2Lx0qseKi6CvQA/8ehfP9TcRbfdVgotcTf > 4zorBilGKhZgaqpftxz8Kxbcldv/xrCczBOWVbB3sZRp4A6zLI9Xuc1c2hIyOia9 > EbvHOPmyEBBKdoa31aK8pjFf8gqXF4pM+ZbeaYfR00/WRJC2PbB+tKBQIXXNX4M= > =cLiK > -----END PGP SIGNATURE-----
> From 365723f7bae6bd5e233f6c5550826cd9aeb956f2 Mon Sep 17 00:00:00 2001 > From: Tim Nicholson <tim.nichol...@bbc.co.uk> > Date: Thu, 4 Dec 2014 15:55:59 +0000 > Subject: [PATCH] doc/filters: Add ascii graphics to clarify what the currently > implemented tinterlace modes do > > Signed-off-by: Tim Nicholson <tim.nichol...@bbc.co.uk> > --- > doc/filters.texi | 151 > +++++++++++++++++++++++++++++++++++++++++++++++++++++++ > 1 file changed, 151 insertions(+) > > diff --git a/doc/filters.texi b/doc/filters.texi > index 8c16c7a..01f1f63 100644 > --- a/doc/filters.texi > +++ b/doc/filters.texi > @@ -8537,26 +8537,116 @@ Available values are: > @item merge, 0 > Move odd frames into the upper field, even into the lower field, > generating a double height frame at half frame rate. > +@example > + Original Original New Frame > + Frame 'j' Frame 'j+1' > + ========== =========== ================== > + Line 0 --------------------> Frame 'j' Line 0 > + Line 0 ----> Frame 'j+1' Line 1 > + Line 1 ---------------------> Frame 'j' Line 2 > + Line 1 ----> Frame 'j+1' Line 3 > + Line 2 --------------------> Frame 'j' Line 4 > + Line 2 ----> Frame 'j+1' Line 5 > + Line 3 ---------------------> Frame 'j' Line 6 > + Line 3 ----> Frame 'j+1' Line 7 > +@end example > > @item drop_odd, 1 > Only output even frames, odd frames are dropped, generating a frame with > unchanged height at half frame rate. > +@example > + Original Original New Frame > + Frame 'j' Frame 'j+1' > + ========== =========== ================== > + Line 0 > + Line 0 ----> Frame 'j+1' Line 0 > + Line 1 > + Line 1 ----> Frame 'j+1' Line 1 > + Line 2 > + Line 2 ----> Frame 'j+1' Line 2 > + Line 3 > + Line 3 ----> Frame 'j+1' Line 3 > +@end example > > @item drop_even, 2 > Only output odd frames, even frames are dropped, generating a frame with > unchanged height at half frame rate. > +@example > + Original Original New Frame > + Frame 'j' Frame 'j+1' > + ========== =========== ================== > + Line 0 --------------------> Frame 'j' Line 0 > + Line 0 > + Line 1 ---------------------> Frame 'j' Line 1 > + Line 1 > + Line 2 --------------------> Frame 'j' Line 2 > + Line 2 > + Line 3 ---------------------> Frame 'j' Line 3 > + Line 3 > +@end example > > @item pad, 3 > Expand each frame to full height, but pad alternate lines with black, > generating a frame with double height at the same input frame rate. > +@example > + Original New Frame > + Frame 'j' Frame 'n' > + ========== ================== > + Line 0 ---------------------> Frame 'j' Line 0 > + black Line 1 > + Line 1 ---------------------> Frame 'j' Line 2 > + black Line 3 > + Line 2 ---------------------> Frame 'j' Line 4 > + black Line 5 > + Line 3 ---------------------> Frame 'j' Line 6 > + black Line 7 > + > + Original New Frame > + Frame 'j+1' Frame 'n+1' > + =========== ================== > + black Line 0 > + Line 0 ---------------------> Frame 'j+1' Line 1 > + black Line 2 > + Line 1 ---------------------> Frame 'j+1' Line 3 > + black Line 4 > + Line 2 ---------------------> Frame 'j+1' Line 5 > + black Line 6 > + Line 3 ---------------------> Frame 'j+1' Line 7 > +@end example > > @item interleave_top, 4 > Interleave the upper field from odd frames with the lower field from > even frames, generating a frame with unchanged height at half frame rate. > +@example > + Original Original New Frame > + Frame 'j' Frame 'j+1' (tff) > + ========== =========== ================== > + Line 0 --------------------> Frame 'j' Line 0 > + Line 1 ----> Frame 'j+1' Line 1 > + Line 2 ---------------------> Frame 'j' Line 2 > + Line 3 ----> Frame 'j+1' Line 3 > + Line 4 --------------------> Frame 'j' Line 4 > + Line 5 ----> Frame 'j+1' Line 5 > + Line 6 ---------------------> Frame 'j' Line 6 > + Line 7 ----> Frame 'j+1' Line 7 > +@end example > > @item interleave_bottom, 5 > Interleave the lower field from odd frames with the upper field from > even frames, generating a frame with unchanged height at half frame rate. > +@example > + Original Original New Frame > + Frame 'j' Frame 'j+1' (bff) > + ========== =========== ================== > + Line 0------> Frame 'j+1' Line 0 > + Line 1 ---------------------> Frame 'j' Line 1 > + Line 2------> Frame 'j+1' Line 2 > + Line 3 ---------------------> Frame 'j' Line 3 > + Line 4------> Frame 'j+1' Line 4 > + Line 5 ---------------------> Frame 'j' Line 5 > + Line 6------> Frame 'j+1' Line 6 > + Line 7 ---------------------> Frame 'j' Line 7 > +@end example > > @item interlacex2, 6 > Double frame rate with unchanged height. Frames are inserted each > @@ -8564,6 +8654,67 @@ containing the second temporal field from the previous > input frame and > the first temporal field from the next input frame. This mode relies on > the top_field_first flag. Useful for interlaced video displays with no > field synchronisation. > +@example > + Original New Frame > + Frame 'j' Frame 'n' > + ========== ================== > + Line 0 ---------------------> Frame 'j' Line 0 > + Line 1 ---------------------> Frame 'j' Line 1 > + Line 2 ---------------------> Frame 'j' Line 2 > + Line 3 ---------------------> Frame 'j' Line 3 > + Line 4 ---------------------> Frame 'j' Line 4 > + Line 5 ---------------------> Frame 'j' Line 5 > + Line 6 ---------------------> Frame 'j' Line 6 > + Line 7 ---------------------> Frame 'j' Line 7 > + > + Original Original New Frame > + Frame 'j' Frame 'j+1' Frame 'n+1' > + ========== =========== ================== > + Line 0------> Frame 'j+1' Line 0 > + Line 1 ---------------------> Frame 'j' Line 1 > + Line 2------> Frame 'j+1' Line 2 > + Line 3 ---------------------> Frame 'j' Line 3 > + Line 4------> Frame 'j+1' Line 4 > + Line 5 ---------------------> Frame 'j' Line 5 > + Line 6------> Frame 'j+1' Line 6 > + Line 7 ---------------------> Frame 'j' Line 7 > + > + Original New Frame > + Frame 'j+1' Frame 'n+2' > + ========== ================== > + Line 0 ---------------------> Frame 'j+1' Line 0 > + Line 1 ---------------------> Frame 'j+1' Line 1 > + Line 2 ---------------------> Frame 'j+1' Line 2 > + Line 3 ---------------------> Frame 'j+1' Line 3 > + Line 4 ---------------------> Frame 'j+1' Line 4 > + Line 5 ---------------------> Frame 'j+1' Line 5 > + Line 6 ---------------------> Frame 'j+1' Line 6 > + Line 7 ---------------------> Frame 'j+1' Line 7 > + > + Original Original New Frame > + Frame 'j+1' Frame 'j+2' Frame 'n+3' > + ========== =========== ================== > + Line 0------> Frame 'j+2' Line 0 > + Line 1 ---------------------> Frame 'j+1' Line 1 > + Line 2------> Frame 'j+2' Line 2 > + Line 3 ---------------------> Frame 'j+1' Line 3 > + Line 4------> Frame 'j+2' Line 4 > + Line 5 ---------------------> Frame 'j+1' Line 5 > + Line 6------> Frame 'j+2' Line 6 > + Line 7 ---------------------> Frame 'j+1' Line 7 > + > + Original New Frame > + Frame 'j+2' Frame 'n+4' > + ========== ================== > + Line 0 ---------------------> Frame 'j+2' Line 0 > + Line 1 ---------------------> Frame 'j+2' Line 1 > + Line 2 ---------------------> Frame 'j+2' Line 2 > + Line 3 ---------------------> Frame 'j+2' Line 3 > + Line 4 ---------------------> Frame 'j+2' Line 4 > + Line 5 ---------------------> Frame 'j+2' Line 5 > + Line 6 ---------------------> Frame 'j+2' Line 6 > + Line 7 ---------------------> Frame 'j+2' Line 7 > +@end example > @end table > This representation requires way more efforts to me to understand than the one from Michael... [...] -- Clément B.
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