[SCM] libav/experimental: Ignore the spec, and calculate aspect ratio on width/height. Fixes issue562 and issue621.

[siretart at users.alioth.debian.org]

The following commit has been merged in the experimental branch:
commit 395206f6b1e445258cba1bdffb82060939030bb4
Author: Michael Niedermayer <michaelni at gmx.at>
Date:   Wed Sep 3 19:04:46 2008 +0000

    Ignore the spec, and calculate aspect ratio on width/height.
    Fixes issue562 and issue621.
    
    Originally committed as revision 15183 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/libavcodec/mpeg12.c b/libavcodec/mpeg12.c
index a7272d5..966fa48 100644
--- a/libavcodec/mpeg12.c
+++ b/libavcodec/mpeg12.c
@@ -1267,7 +1267,9 @@ static int mpeg_decode_postinit(AVCodecContext *avctx){
                 1<<30);
         //MPEG-2 aspect
             if(s->aspect_ratio_info > 1){
-                if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
+                //we ignore the spec here as reality does not match the spec, see for example
+                // res_change_ffmpeg_aspect.ts and sequence-display-aspect.mpg
+                if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) || 1){
                     s->avctx->sample_aspect_ratio=
                         av_div_q(
                          ff_mpeg2_aspect[s->aspect_ratio_info],

-- 
Libav/FFmpeg packaging