[FFmpeg-trac] #10104(ffprobe:reopened): ffprobe: doesn't write data when using -print_format/-of option (was: ffprobe: doesn't write data when using -print_format option)

[FFmpeg]

#10104: ffprobe: doesn't write data when using -print_format/-of option
---------------------------------+------------------------------------
             Reporter:  smurfix  |                    Owner:  (none)
                 Type:  defect   |                   Status:  reopened
             Priority:  normal   |                Component:  ffprobe
              Version:  5.1.2    |               Resolution:
             Keywords:           |               Blocked By:
             Blocking:           |  Reproduced by developer:  0
Analyzed by developer:  0        |
---------------------------------+------------------------------------
Changes (by smurfix):

 * status:  closed => reopened
 * resolution:  needs_more_info =>
 * summary:  ffprobe: doesn't write data when using -print_format option =>
     ffprobe: doesn't write data when using -print_format/-of option


Old description:

> Summary of the bug:
>
> "ffprobe -of XXX" prints something that might contain XXX but doesn't
> actually write any data.
>
> How to reproduce:
> {{{
> % ffprobe 01.ogg
> [ comprehensive data dump ]
>
> % ffprobe -of json 01.ogg 2>/dev/null
> {
>
> }
> }}}
>
> This happens with MP4 files too so looks like a generic problem.

New description:

 Summary of the bug:

 "ffprobe -of XXX" prints something that might contain XXX but doesn't
 actually write any data.

 How to reproduce:
 {{{
 % ffprobe -of json 01.ogg 2>/dev/null
 {

 }
 % ffprobe -of json 01.ogg
 {
 ffprobe version 5.1.2-1 Copyright (c) 2007-2022 the FFmpeg developers
   built with gcc 12 (Debian 12.2.0-3)
   configuration: --prefix=/usr --extra-version=1 --toolchain=hardened
 --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu
 --arch=amd64 --enable-gpl --disable-stripping --enable-gnutls --enable-
 ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b
 --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d
 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-
 libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-
 libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg
 --enable-libopenmpt --enable-libopus --enable-libpulse --enable-
 librabbitmq --enable-librist --enable-librubberband --enable-libshine
 --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt
 --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame
 --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp
 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
 --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal
 --enable-opencl --enable-opengl --enable-sdl2 --disable-sndio --enable-
 pocketsphinx --enable-librsvg --enable-libmfx --enable-libdc1394 --enable-
 libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-
 libx264 --enable-libplacebo --enable-librav1e --enable-shared
   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
 Input #0, ogg, from '01.ogg':
   Duration: 00:02:36.45, start: 0.000000, bitrate: 141 kb/s
   Stream #0:0: Audio: vorbis, 44100 Hz, stereo, fltp, 160 kb/s
 }
 }}}

 This happens with MP4 files too so looks like a generic problem.

--
Comment:

 I'd like to remind you that -print_format is documented as doing exactly
 the same thing as -of.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10104#comment:5>
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