thickness=fill does not work for all supported versions

[Kyle]

According to ​https://launchpad.net/ubuntu/+source/ffmpeg version 4.2.4-1 is supported for Ubuntu The Focal Fossa and version 3.4.8-0 is supported for Ubuntu The Bionic Beaver

I have command that may need to run in both environments that involves a drawbox with thickness=[max or fill]
In 4.2.4-1 'fill' works but 'max' does not.
In 3.4.8-0 'max' works but 'fill' does not.

https://ffmpeg.org/ffmpeg-all.html#drawbox calls for using 'fill' but it does not work for 3.4.8-0

Sample command:

ffmpeg -i /tmp/ffmpeg/trans.m4v -vf "drawbox=color=black:thickness=fill" /tmp/ffmpeg/output_1.mp4

or

ffmpeg -i /tmp/ffmpeg/trans.m4v -vf "drawbox=color=black:thickness=max" /tmp/ffmpeg/output_1.mp4

Running with fill on 3.4.8-0 gives output:

ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
  configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
  libavutil      55. 78.100 / 55. 78.100
  libavcodec     57.107.100 / 57.107.100
  libavformat    57. 83.100 / 57. 83.100
  libavdevice    57. 10.100 / 57. 10.100
  libavfilter     6.107.100 /  6.107.100
  libavresample   3.  7.  0 /  3.  7.  0
  libswscale      4.  8.100 /  4.  8.100
  libswresample   2.  9.100 /  2.  9.100
  libpostproc    54.  7.100 / 54.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/ffmpeg/trans.m4v':
  Metadata:
    major_brand     : M4V 
    minor_version   : 512
    compatible_brands: isomiso2avc1
    title           : TED: Luisa Neubauer (2019 TEDx)
    artist          : TED
    album           : TEDTalks
    date            : 2019
    encoder         : Lavf57.83.100
    comment         : To learn more about this speaker, find other TEDTalks, and subscribe to this Podcast series, visit www.TED.com
                    : Feedback: contact@ted.com
    genre           : Podcast
    media_type      : 0
  Duration: 00:00:58.03, start: 0.000000, bitrate: 552 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 4:3 DAR 16:9], 383 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
File '/tmp/ffmpeg/output_1.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[Parsed_drawbox_0 @ 0x55b34736d9c0] [Eval @ 0x7fff8cc7bce0] Undefined constant or missing '(' in 'fill'
    Last message repeated 5 times
[Parsed_drawbox_0 @ 0x55b34736d9c0] Error when evaluating the expression 'fill'.
[Parsed_drawbox_0 @ 0x55b34736d9c0] Failed to configure input pad on Parsed_drawbox_0
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
[aac @ 0x55b346ebee40] Qavg: 17716.898
[aac @ 0x55b346ebee40] 2 frames left in the queue on closing
Conversion failed!

Running with 'max' on 4.2.4-1 gives:

ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/tmp/ffmpeg/trans.m4v':
  Metadata:
    major_brand     : M4V 
    minor_version   : 512
    compatible_brands: isomiso2avc1
    title           : TED: Luisa Neubauer (2019 TEDx)
    artist          : TED
    album           : TEDTalks
    date            : 2019
    encoder         : Lavf57.83.100
    comment         : To learn more about this speaker, find other TEDTalks, and subscribe to this Podcast series, visit www.TED.com
                    : Feedback: contact@ted.com
    genre           : Podcast
    media_type      : 0
  Duration: 00:00:58.03, start: 0.000000, bitrate: 552 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 640x480 [SAR 4:3 DAR 16:9], 383 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 160 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
File '/tmp/ffmpeg/output_1.mp4' already exists. Overwrite ? [y/N] y
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[Parsed_drawbox_0 @ 0x55e0c9621340] [Eval @ 0x7ffeab2cb8b0] Undefined constant or missing '(' in 'max'
    Last message repeated 5 times
[Parsed_drawbox_0 @ 0x55e0c9621340] Error when evaluating the expression 'max'.
[Parsed_drawbox_0 @ 0x55e0c9621340] Failed to configure input pad on Parsed_drawbox_0
Error reinitializing filters!
Failed to inject frame into filter network: Invalid argument
Error while processing the decoded data for stream #0:0
[aac @ 0x55e0c919bb40] Qavg: 33384.375
[aac @ 0x55e0c919bb40] 2 frames left in the queue on closing
Conversion failed!

[Carl Eugen Hoyos]

Please understand that only current FFmpeg git head is supported on this bug tracker.

Using max was a bug, it was therefore replaced with fill in b3cb9bd43fa33a8aaf7a63e43f8418975b3bf0de