[FFmpeg-user] DAR/SAR

[Steve Zemlicka]

if you run ffprobe [filename], you'll notice that it does indicate 4:3 for
stream#0:0
  Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(progressive), 640x480, 792 kb/s, SAR 1:1 DAR 4:3, 23.98 fps, 23.98
tbr, 23981 tbn (default)

When dealing with aspect ratios, it's always good to do a ffprobe to
examine the details of how ffmpeg will interpret/recognize the files.  The
entire ffprobe for that file is as follows:

ffprobe version n5.1.2 Copyright (c) 2007-2022 the FFmpeg developers
  built with gcc 12.2.0 (GCC)
  configuration: --prefix=/usr --disable-debug --disable-static
--disable-stripping --enable-amf --enable-avisynth --enable-cuda-llvm
--enable-lto --enable-fontconfig --enable-gmp --enable-gnutls --enable-gpl
--enable-ladspa --enable-libaom --enable-libass --enable-libbluray
--enable-libbs2b --enable-libdav1d --enable-libdrm --enable-libfreetype
--enable-libfribidi --enable-libgsm --enable-libiec61883 --enable-libjack
--enable-libmfx --enable-libmodplug --enable-libmp3lame
--enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg
--enable-libopus --enable-libpulse --enable-librav1e --enable-librsvg
--enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh
--enable-libsvtav1 --enable-libtheora --enable-libv4l2 --enable-libvidstab
--enable-libvmaf --enable-libvorbis --enable-libvpx --enable-libwebp
--enable-libx264 --enable-libx265 --enable-libxcb --enable-libxml2
--enable-libxvid --enable-libzimg --enable-nvdec --enable-nvenc
--enable-opencl --enable-opengl --enable-shared --enable-version3
--enable-vulkan
  libavutil      57. 28.100 / 57. 28.100
  libavcodec     59. 37.100 / 59. 37.100
  libavformat    59. 27.100 / 59. 27.100
  libavdevice    59.  7.100 / 59.  7.100
  libavfilter     8. 44.100 /  8. 44.100
  libswscale      6.  7.100 /  6.  7.100
  libswresample   4.  7.100 /  4.  7.100
  libpostproc    56.  6.100 / 56.  6.100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x557a198b11c0] stream 0, timescale not set
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Hallelujah (1929)._edit.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    iTunEXTC        : mpaa|NR|600|
    iTunMOVI        : <?xml version="1.0" encoding="UTF-8"?>
                    : <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "
http://www.apple.com/DTDs/PropertyList-1.0.dtd">
                    : <plist version="1.0">
                    : <dict>
                    : <key>directors</key>
                    : <array>
                    : <dict>
                    : <key>name</key>
                    : <string>King Vidor</string>
                    : </dict>
                    : </array>
                    : <key>producers</key>
                    : <array>
                    : <dict>
                    : <key>name</key>
                    : <string>Irving Thalberg</string>
                    : </dict>
                    : </array>
                    : <key>screenwriters</key>
                    : <array>
                    : <dict>
                    : <key>name</key>
                    : <string>Wanda Tuchock</string>
                    : </dict>
                    : </array>
                    : <key>studio</key>
                    : <string>Metro-Goldwyn-Mayer</string>
                    : </dict>
                    : </plist>
                    :
    title           : Hallelujah
    artist          : Victoria Spivey
    genre           : Drama
    date            : 1929-08-20
    description     : Sharecroppers Zeke and Spunk Johnson sell their
family's portion of the cotton crop for $100. They are promptly cheated out
of the money by the shill Chick (Nina Mae McKinney), in collusion with her
gambling-hustler boyfriend, Hot Shot. Spunk is murdered
    synopsis        : Sharecroppers Zeke and Spunk Johnson sell their
family's portion of the cotton crop for $100. They are promptly cheated out
of the money by the shill Chick (Nina Mae McKinney), in collusion with her
gambling-hustler boyfriend, Hot Shot. Spunk is murdered
    encoder         : Lavf58.20.100
    hd_video        : 0
    media_type      : 9
  Duration: 01:39:51.41, start: 0.000000, bitrate: 869 kb/s
  Chapters:
    Chapter #0:0: start 0.000000, end 5991.000000
      Metadata:
        title           : Chapter 1
  Stream #0:0[0x1](eng): Video: h264 (High) (avc1 / 0x31637661),
yuv420p(progressive), 640x480, 792 kb/s, SAR 1:1 DAR 4:3, 23.98 fps, 23.98
tbr, 23981 tbn (default)
    Metadata:
      handler_name    : VideoHandler
      vendor_id       : [0][0][0][0]
  Stream #0:1[0x2](und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz,
stereo, fltp, 65 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      vendor_id       : [0][0][0][0]
  Stream #0:2[0x0]: Video: mjpeg (Baseline), yuvj420p(pc,
bt470bg/unknown/unknown), 680x1000 [SAR 1:1 DAR 17:25], 90k tbr, 90k tbn
(attached pic)
  Stream #0:3[0x3](und): Data: bin_data (text / 0x74786574)
    Metadata:
      creation_time   : 2023-02-18T02:49:07.000000Z

On Tue, Feb 28, 2023 at 12:22 PM Jim Julian via ffmpeg-user <
ffmpeg-user at ffmpeg.org> wrote:

> I've just finished a dialogue with MediaInfo and there seems to be a
> difference in the Linux and Windows versions. I also tried using WSL and
> bash without success. The DAR/SAR are still reported incorrectly.
>  680x1000 [SAR 1:1  DAR  17:25], where the movie is actually 640x480 and
> DAR=4:3.
>
> For anyone interested in examing the movie (636Mb) , here's a dropbox link
> to the movie:
> https://www.dropbox.com/s/d66qlltgnpnru0d/Hallelujah%20%281929%29._edit.mp4?dl=0
>
>
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