[FFmpeg-trac] #11447(undetermined:new): ffpreset functionality does not work as advertised

[FFmpeg]

#11447: ffpreset functionality does not work as advertised
-------------------------------------+-------------------------------------
             Reporter:  Marth64      |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 Note this section of the docs:
 >For the vpre, apre, and spre options, the options specified in a preset
 file are applied to the currently selected codec of the same type as the
 preset option.

 Given the following:
 * A video and audio source
 * Video and audio encoders which take an option with the same name, such
 as "profile" (in this example we will use libx264 and libfdk_aac)
 * Create an ffpreset file libx264-buggy.ffpreset in ~/.ffmpeg or
 $FFMPEG_DATADIR, with this content:
 {{{
 vcodec=libx264

 profile=high
 }}}

 How to reproduce:
 Now run
 {{{
 ffmpeg \
     -y \
     -ss 860 -t 360 \
     -i INPUT.mkv \
     -map 0:v:0 \
     -bsf:0 "filter_units=remove_types=6" \
     -filter:0
 "bwdif=1,crop=516:469:94:11,scale=528:480:lanczos,setdar=4/3" \
     -vpre:0 "libx264-buggy" \
     -map 0:a:0 \
     -c:1 libfdk_aac \
     -ac:1 2 \
     -ar:1 44100 \
     -b:1 256k \
     -map_metadata -1 \
     OUTPUT.mkv
 }}}


 And observe that the profile option was picked up by the audio encoder
 instead, causing an abort.
 {{{
 ffmpeg version N-118421-g774f36756a Copyright (c) 2000-2025 the FFmpeg
 developers
   built with gcc 13 (Ubuntu 13.3.0-6ubuntu2~24.04)
   configuration: --enable-debug=3 --enable-ffplay --enable-gpl --enable-
 nonfree --enable-ffnvcodec --enable-vulkan --enable-libx264 --enable-
 libfdk_aac --enable-openssl --enable-version3 --enable-demuxer=dvdvideo
 --enable-libdvdread --enable-libdvdnav --samples=fate-suite/
   libavutil      59. 56.100 / 59. 56.100
   libavcodec     61. 32.100 / 61. 32.100
   libavformat    61.  9.106 / 61.  9.106
   libavdevice    61.  4.100 / 61.  4.100
   libavfilter    10.  9.100 / 10.  9.100
   libswscale      8. 13.100 /  8. 13.100
   libswresample   5.  4.100 /  5.  4.100
   libpostproc    58.  4.100 / 58.  4.100
 Input #0, matroska,webm, from 'INPUT.mkv':
   Metadata:
     ENCODER         : Lavf61.9.106
   Duration: 00:23:36.70, start: 0.000000, bitrate: 5189 kb/s
   Stream #0:0(eng): Video: mpeg2video (Main), yuv420p(tv, smpte170m, top
 first), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 1k tbn (default)
 (original)
     Metadata:
       title           : en-US
       DURATION        : 00:23:36.248000000
     Side data:
       cpb: bitrate max/min/avg: 9800000/0/0 buffer size: 1835008
 vbv_delay: N/A
   Stream #0:1(eng): Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s (default)
 (original)
     Metadata:
       title           : en-US
       DURATION        : 00:23:36.695000000
 [libfdk_aac @ 0x62e1b4c91200] [Eval @ 0x7fff1ac2dae0] Undefined constant
 or missing '(' in 'high'
 [libfdk_aac @ 0x62e1b4c91200] Unable to parse option value "high"
 [libfdk_aac @ 0x62e1b4c91200] Error setting option profile to value high.
 [aost#0:1/libfdk_aac @ 0x62e1b4c90ac0] Error applying encoder options:
 Invalid argument
 Error opening output file OUTPUT.mkv.
 Error opening output files: Invalid argument
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11447>
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