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140 Commits

Author SHA1 Message Date
Loren Merritt
1cfe393a25 doxy comment tweaks 
Originally committed as revision 8580 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-03-31 23:58:33 +00:00
Guillaume Poirier
bb21f1762a Add doxy comments, based on Loren's explanations posted here: 
Date: Mar 30, 2007 9:00 PM
Subject: Re: [Ffmpeg-devel] Motion Estimation in snow.c for Waevelet encoded frames (DWT)

Originally committed as revision 8579 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-03-31 22:39:43 +00:00
Reimar Döffinger
f66e4f5f9e Add av_ prefix to clip functions 
Originally committed as revision 8122 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2007-02-25 10:27:12 +00:00
Michael Niedermayer
d951bb9a5c test DIRECT{0,0} too if flag mv0 is used 
slight PSNR/bitrate increase

Originally committed as revision 7361 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-22 23:30:57 +00:00
Michael Niedermayer
2175b80bed simplify 
Originally committed as revision 7345 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-21 15:22:16 +00:00
Michael Niedermayer
3b9cf3bdb3 i think this if() is useless lets abuse our users to test this ;) 
Originally committed as revision 7344 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-21 15:21:44 +00:00
Michael Niedermayer
2f16af0667 skip motion estimation and encoding of non direct-0,0 MBs if the next MB is skiped (mpeg4 doesnt allow such MBs and in the past we did ME and encoding until at the end we droped them, so this should be faster though i didnt benchmark it, benchmark welcome) 
Originally committed as revision 7343 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-21 15:20:02 +00:00
Michael Niedermayer
95cefcb4ed 10l 
Originally committed as revision 7328 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-17 15:41:30 +00:00
Michael Niedermayer
af6a403a05 warn user if the selected diamond size is larger then the motion estimation score cache size 
Originally committed as revision 7326 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-17 13:11:34 +00:00
Michael Niedermayer
a6daaf7cce limit x/ymin/max to me_range 
slight psnr/bitrate gain for most but not all files if me_range is used

Originally committed as revision 7325 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-17 12:07:09 +00:00
Guillaume Poirier
e828d257e7 Doxygen comments about variables described by Michael here: 
Date: Tue, 12 Dec 2006 14:00:54 +0100
Subject: Re: [Ffmpeg-cvslog] r6876 - trunk/libavcodec/motion_est.c

Originally committed as revision 7288 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-12 13:41:17 +00:00
Måns Rullgård
849f10351d rename always_inline to av_always_inline and move to common.h 
Originally committed as revision 7256 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-08 00:35:08 +00:00
Diego Biurrun
c6c367254f spelling cosmetics: cliped --> clipped 
Originally committed as revision 7208 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-12-02 14:19:49 +00:00
Michael Niedermayer
dd7e46e7c3 new I/P frame selection heuristic 
PSNR/bitrate is slightly better for my (short) test videos
more tests welcome ...

Originally committed as revision 6876 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-11-02 23:36:39 +00:00
Michael Niedermayer
95da34cd54 CANDIDATE_MB_TYPE_INTER heuristic doesnt work at really low quality where the distortion becomes less relevant then the overhead of intra blocks 
Originally committed as revision 6829 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-10-28 20:00:05 +00:00
Diego Biurrun
c26abfa541 Rename ABS macro to FFABS. 
Originally committed as revision 6666 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-10-11 23:17:58 +00:00
Diego Biurrun
b78e7197a8 Change license headers to say 'FFmpeg' instead of 'this program/this library' 
and fix GPL/LGPL version mismatches.

Originally committed as revision 6577 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-10-07 15:30:46 +00:00
Marco Manfredini
8226ecaa6c Fix CHECK_BIDIR macro so it works with Intel's Compiler 
Patch by Marco Manfredini  mldb A gmx P net

Originally committed as revision 5989 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-08-12 16:31:17 +00:00
Michael Niedermayer
8437ff75f8 asserts to check if assumed conditions really are true 
Originally committed as revision 5143 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-03-10 22:00:36 +00:00
Steve L'Homme
267f7edcd1 (f)printf --> av_log conversion 
taken from a patch by Steve L'Homme

Originally committed as revision 5127 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-03-08 11:43:10 +00:00
Corey Hickey
39a64e3023 sc_factor support for encoding. 
Here's the description I'll add to the mplayer man page:
---
Causes frames with higher quantizers to be more likely to trigger a
scene change detection and make libavcodec use an I-frame (default: 1).
1-16 is a sane range.
Values between 2 and 6 may yield increasing PSNR (up to approximately
0.04 dB) and better placement of I-frames in high-motion scenes.
Higher values than 6 may give very slightly better PSNR (approximately
0.01 dB more than sc_factor=6), but noticably worse visual quality.
---

Original idea from Michael; patch by me.

Originally committed as revision 4883 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-01-22 20:54:52 +00:00
Diego Biurrun
5509bffa88 Update licensing information: The FSF changed postal address. 
Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-01-12 22:43:26 +00:00
Loren Merritt
8bf755d4ff 10l: bidir_refine didn't save the new mvs. also improve speed. 
Originally committed as revision 4832 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2006-01-09 02:08:12 +00:00
Michael Niedermayer
aaaa6f1549 dont discard least significant bits 
Originally committed as revision 4773 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-25 16:34:12 +00:00
Michael Niedermayer
aacb6acc8a hmm did i mess the scaling of these up at some point? 
anyway, this change decreases bitrate and increase PSNR by ~1.00 on my test file, other files also benefit significantly

Originally committed as revision 4771 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-24 23:47:29 +00:00
Michael Niedermayer
d4f0c2fcc3 10l (segfault fix) 
Originally committed as revision 4769 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-23 19:05:48 +00:00
Michael Niedermayer
316a2ec84c bidir refine support 
Originally committed as revision 4768 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-23 16:25:00 +00:00
Michael Niedermayer
377798d6bd minor typo 
Originally committed as revision 4767 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-23 00:40:52 +00:00
Diego Biurrun
bb270c0896 COSMETICS: tabs --> spaces, some prettyprinting 
Originally committed as revision 4764 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-22 01:10:11 +00:00
Diego Biurrun
115329f160 COSMETICS: Remove all trailing whitespace. 
Originally committed as revision 4749 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-12-17 18:14:38 +00:00
Michael Niedermayer
95ae72b7e0 Compilation fixes part 1 patch by (Arvind R. and Burkhard Plaum, plaum, ipf uni-stuttgart de) 
Originally committed as revision 4540 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-08-26 19:05:44 +00:00
Måns Rullgård
bf4e3bd2d0 kill a bunch of compiler warnings 
Originally committed as revision 4522 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-08-14 15:42:40 +00:00
Michael Niedermayer
0cc64d3d1c fix assertion failure for mpeg2 encoding 
Originally committed as revision 4488 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-08-01 20:01:41 +00:00
Michael Niedermayer
2f300f8965 motion vector limit for mpeg2 
Originally committed as revision 4482 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-07-27 13:16:35 +00:00
Diego Biurrun
bb628dae44 spelling fixes 
patch by Peter Robinson pbrobinson @ at @ gmail . dot . com and myself

Originally committed as revision 4382 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-06-17 15:02:53 +00:00
Michael Niedermayer
725de25c4c fix segfault with 'ffmpeg -i 1.avi -cmp 257 -4mv 2.avi' 
Originally committed as revision 4178 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-05-05 13:40:28 +00:00
Mike Melanson
160d679c07 Ministry of English Composition, reporting for duty (and the word is "skipped", not "skiped"; "skiped" would rhyme with "hyped") 
Originally committed as revision 4153 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-04-24 17:21:11 +00:00
Michael Niedermayer
cec1f05fd7 check mb/me_threshold range, fixes assertion failure 
Originally committed as revision 4082 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-03-26 18:10:44 +00:00
Måns Rullgård
88730be651 kill warnings patch by (Måns Rullgård <mru inprovide com>) 
Originally committed as revision 3977 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2005-02-24 19:08:50 +00:00
Michael Niedermayer
096c3b7e90 overflow fix 
Originally committed as revision 3685 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-11-16 13:40:56 +00:00
Michael Niedermayer
1c3990dbba H.261 encoder by (Maarten Daniels <maarten dot daniels at luc dot ac dot be>) 
Originally committed as revision 3643 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-10-28 10:12:57 +00:00
Michael Niedermayer
7494cac0fd fix constrained parameters flag 
Originally committed as revision 3609 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-10-18 23:07:18 +00:00
Michael Niedermayer
155ec6edf8 quad tree based motion compensation (currently only 16x16 & 8x8 OBMC blocks, but can be extended to other block sizes easily) 
different intra block coding (previous was just an ugly hack)
1.8% bitrate reduction -0.01PSNR (foreman@352x288 qscale=8)
1.5% bitrate reduction +0.05PSNR (foreman@352x288 qscale=1)

Originally committed as revision 3416 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-08-26 20:04:54 +00:00
Michael Niedermayer
26efc54e4a 4x4 SSE compare function 
wavelet based compare functions
make epzs_motion_search() more flexible so it can be used for a wider range of block sizes
make get_penalty_factor() independant of MpegEncContext

Originally committed as revision 3410 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-08-22 17:16:03 +00:00
Michael Niedermayer
dbc56b3914 chroma me fix 
Originally committed as revision 3216 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-06-11 21:12:46 +00:00
Michael Niedermayer
ae1dbde1cf clip input motion vectors 
be somewhat more tollerant on invalid input
return INT_MAX instead of -1 for unuseable mv/mb types as that ensures nicely that they arent used
initalize limits earlier for b frames
a few more asserts to check for out of picture vectors

Originally committed as revision 3213 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-06-10 22:56:43 +00:00
Michael Niedermayer
d4c5d2adf3 nsse weight 
Originally committed as revision 3205 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-06-07 17:30:02 +00:00
Michael Niedermayer
e6a2ac3474 noise preserving sum of squares comparission function 
Originally committed as revision 3204 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-06-07 03:23:31 +00:00
Michael Niedermayer
0e9d4a67f4 change qscale -> lambda for the motion estimation 
finetune bit/distortion weighting factor used in motion estimation, the old coeffs where finetuned relative to incorrect mv_penalty tables which where then fixed later but the coeffs where not
this _may_ fix the long standing blocking artifacts, but may also introduce mudding artefacts theoretically, so please tell us if u stumble across any so we can either fix them or export this variable so the user can change it

Originally committed as revision 3189 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-06-03 19:29:47 +00:00
Michael Niedermayer
1f202b0d46 moving motion estimation specific variables from MpegEncContext -> MotionEstContext 
Originally committed as revision 3124 to svn://svn.ffmpeg.org/ffmpeg/trunk
 2004-05-11 01:38:46 +00:00