[MacPorts] #70958: ffmpeg - how to incorporate libwebp?

[MacPorts]

#70958: ffmpeg - how to incorporate libwebp?
-----------------------------+-----------------------------
 Reporter:  seamusdemora     |      Owner:  (none)
     Type:  request          |     Status:  new
 Priority:  Normal           |  Milestone:  MacPorts 2.10.2
Component:  ports            |    Version:  2.10.1
 Keywords:  ffmpeg, libwebp  |       Port:  ffmpeg
-----------------------------+-----------------------------
 I gather that 'libwebp' is not included with the 'ffmpeg' port. I found a
 recipe for converting an 'mp4' to a 'webp', but all I got for that was the
 error 'Unknown encoder 'libwebp''.

 I followed Google's advice & tried to build 'libwebp' following these
 instructions:
 https://developers.google.com/speed/webp/docs/compiling#building

 But this did not work either. I got the exact same error message. FWIW,
 here's the command I was trying to use:

 {{{
 ffmpeg -i "JW-recording.mp4" \
 -vf "fps=10,scale=720:-1:flags=lanczos" \
 -vcodec libwebp -lossless 0 -compression_level 6 \
 -q:v 50 -loop 0 \
 -preset picture -an -vsync 0 JW-recording.webp

 ffmpeg version 4.4.4 Copyright (c) 2000-2023 the FFmpeg developers
   built with Apple clang version 14.0.3 (clang-1403.0.22.14.1)
   configuration: --prefix=/opt/local --cc=/usr/bin/clang
 --mandir=/opt/local/share/man --enable-audiotoolbox --disable-indev=jack
 --disable-libjack --disable-libopencore-amrnb --disable-libopencore-amrwb
 --disable-libxcb --disable-libxcb-shm --disable-libxcb-xfixes --enable-
 opencl --disable-outdev=xv --enable-sdl2 --disable-securetransport
 --enable-videotoolbox --enable-avfilter --enable-avresample --enable-
 fontconfig --enable-gnutls --enable-libass --enable-libbluray --enable-
 libdav1d --enable-libfreetype --enable-libfribidi --enable-libmodplug
 --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-librsvg
 --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvorbis
 --enable-libvpx --enable-libzimg --enable-libzvbi --enable-lzma --enable-
 pthreads --enable-shared --enable-swscale --enable-zlib --enable-libaom
 --enable-libsvtav1 --arch=arm64 --enable-gpl --enable-libvidstab --enable-
 libx264 --enable-libx265 --enable-libxvid --enable-postproc
   libavutil      56. 70.100 / 56. 70.100
   libavcodec     58.134.100 / 58.134.100
   libavformat    58. 76.100 / 58. 76.100
   libavdevice    58. 13.100 / 58. 13.100
   libavfilter     7.110.100 /  7.110.100
   libavresample   4.  0.  0 /  4.  0.  0
   libswscale      5.  9.100 /  5.  9.100
   libswresample   3.  9.100 /  3.  9.100
   libpostproc    55.  9.100 / 55.  9.100
 [libdav1d @ 0x12e815e00] libdav1d 1.4.3
 Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'JW-recording.mp4':
   Metadata:
     major_brand     : isom
     minor_version   : 512
     compatible_brands: isomav01iso2mp41
     encoder         : Lavf58.76.100
   Duration: 00:00:05.50, start: 0.000000, bitrate: 106 kb/s
   Stream #0:0(und): Video: av1 (Main) (av01 / 0x31307661), yuv420p(tv,
 progressive), 460x332 [SAR 1:1 DAR 115:83], 104 kb/s, 10 fps, 10 tbr,
 10240 tbn, 10240 tbc (default)
     Metadata:
       handler_name    : VideoHandler
       vendor_id       : [0][0][0][0]

 Unknown encoder 'libwebp'     <===ERROR MESSAGE

 }}}

 I did set the environment variable for 'LD_LIBRARY_PATH' as follows:
 'export LD_LIBRARY_PATH=/usr/local/lib/', but that also didn't help. I
 even ran the above command using the following (in the 3rd line of the
 command above):

 ```
 -vcodec /usr/local/lib/libwebp -lossless 0 -compression_level 6 \
 ```

 I'm afraid I've reached the limits of my ability to troubleshoot this
 issue; posting here looking for some help!

-- 
Ticket URL: <https://trac.macports.org/ticket/70958>
MacPorts <https://www.macports.org/>
Ports system for macOS