[FFmpeg-user] DAR/SAR
Jim Julian
jimlynnjulian2 at yahoo.com
Wed Mar 1 06:37:58 EET 2023
Hello,
The problem turns out to be a poster thumbnail inserted as data. A closer look shows the thumbnail listed in ffprobe. I removed the thumbnail and the problem was removed as well.
Problem solved.
I'm not used to this forum format so may have not recognized your response in a message that seemed all junk.
I incorrectly assumed ffmpeg, VLC, and MediaInfo recognized the full set of Matroska and MPEG-4 tags, except, maybe, for the custom tags in the Matroska specification.
Thank you for your time and interest.
Jim Julian
Cogito ergo sum.
René Descartes circa 1685
“I think, therefore, I am.”
Sum ergo cogito.
Google 2004
“So, I’m thinking...”
> On Feb 28, 2023, at 6:36 PM, Steve Zemlicka <stevezemlicka at gmail.com> wrote:
>
> Sorry, I just saw that you already ran an ffprobe. If you run ffprobe
> again and look for Stream #0:0, does yours report the DAR as 4:3? If so,
> perhaps you were looking at Stream #0:2 when you were seeing the DAR
> 17:25. If not, then perhaps there's something else going on with your
> build. If that's the case, let us know which version you're running
> (usually reported at the top of ffprobe/ffmpeg output)
>
>> On Tue, Feb 28, 2023 at 5:34 PM Steve Zemlicka <stevezemlicka at gmail.com>
>> wrote:
>>
>> 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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>>>
>>
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