[FFmpeg-user] Quicktime DV MOVs - 2 different SAR informations

[Christoph Gerstbauer]

Hello,

I have here some MOV samples with DVcodec.
When opening the MOVs with ffprobe it shows me 2 different DAR/SAR 
informations. First information (a) is placed in brackets after the 
Res-info, the second one (b) is placed after the bitrate info:

Fileprobe 1:
a.) 720x576 [SAR 16:15 DAR 4:3]
b.) SAR 59:54 DAR 295:216

or
Fileprobe 2:
a.) 720x576 [SAR 64:45 DAR 16:9]
b.) SAR 178:163 DAR 1958:1467

When I use "-show_frames" the video frames have the same SAR like in the 
"b.)"s.
But where do the right SAR values (which are place in brackets) come from?

Fileprobes can be downloaded here:
https://dl.dropboxusercontent.com/u/26129407/ffmpeg_user_mailing_sample_DV_MOV_SAR.zip


Bg
Christoph


Command Line output



C:\Users\gersti>ffmpeg -i 
C:\Users\gersti\Dropbox\Arbeit\01_optBFF_DV420_091101_AN_Afghanistan_Abdullah.mov
ffmpeg version 2.2.1 Copyright (c) 2000-2014 the FFmpeg developers
   built on Apr 11 2014 00:32:01 with gcc 4.8.2 (GCC)
   configuration: --enable-gpl --enable-version3 --disable-w32threads 
--enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r 
--enable-gnutls --enable-iconv --enable-li
bass --enable-libbluray --enable-libcaca --enable-libfreetype 
--enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame 
--enable-libopencore-amrnb --enable-libopenco
re-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp 
--enable-libschroedinger --enable-libsoxr --enable-libspeex 
--enable-libtheora --enable-libtwolame --enable-libvidst
ab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis 
--enable-libvpx --enable-libwavpack --enable-libx264 --enable-libxavs 
--enable-libxvid --enable-zlib
   libavutil      52. 66.100 / 52. 66.100
   libavcodec     55. 52.102 / 55. 52.102
   libavformat    55. 33.100 / 55. 33.100
   libavdevice    55. 10.100 / 55. 10.100
   libavfilter     4.  2.100 /  4.  2.100
   libswscale      2.  5.102 /  2.  5.102
   libswresample   0. 18.100 /  0. 18.100
   libpostproc    52.  3.100 / 52.  3.100
Guessed Channel Layout for  Input Stream #0.1 : stereo
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 
'C:\Users\gersti\Dropbox\Arbeit\01_optBFF_DV420_091101_AN_Afghanistan_Abdullah.mov':
   Metadata:
     major_brand     : qt
     minor_version   : 537199360
     compatible_brands: qt
     creation_time   : 2009-11-02 12:25:59
   Duration: 00:00:25.84, start: 0.000000, bitrate: 30342 kb/s
     Stream #0:0(eng): Video: dvvideo (dvcp / 0x70637664), yuv420p, 
720x576 [SAR 16:15 DAR 4:3], 28800 kb/s, SAR 59:54 DAR 295:216, 25 fps, 
25 tbr, 25 tbn, 25 tbc (default)
     Metadata:
       creation_time   : 2009-11-02 12:25:59
       handler_name    : Apple Alias-Datensteuerung
       timecode        : 00:00:00:00
     Stream #0:1(eng): Audio: pcm_s16be (twos / 0x736F7774), 48000 Hz, 
stereo, s16, 1536 kb/s (default)
     Metadata:
       creation_time   : 2009-11-02 12:25:59
       handler_name    : Apple Alias-Datensteuerung
     Stream #0:2(eng): Data: none (tmcd / 0x64636D74), 0 kb/s (default)
     Metadata:
       creation_time   : 2009-11-02 12:26:14
       handler_name    : Apple Alias-Datensteuerung
       timecode        : 00:00:00:00
At least one output file must be specified