-----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 Numeric values are deprecated but are accepted for backward -- 2.1.3
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