[FFmpeg-trac] #8520(documentation:closed): wrong examples in streamselect documentation

[FFmpeg]

#8520: wrong examples in streamselect documentation
-------------------------------------+-------------------------------------
             Reporter:  mkoch        |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
                                     |  documentation
              Version:  git-master   |               Resolution:  invalid
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by mkoch):

 Replying to [comment:8 richardpl]:
 > {{{ffmpeg -i red-leaf-tips.avi -i windy-sunset.avi -lavfi
 streamselect at my_special_filter=inputs=2:map=0,sendcmd='5.0
 streamselect at my_special_filter map 1' -f null -}}}
 >
 > This is also showed in documentation of sendcmd filter. Simply putting
 sendcmd as last filter before output will work, it will broadcast to all
 filters with exact same name @my_special_filter.

 To which documentation do you refer? In ffmpeg-all.html I find no example
 for placing sendcmd after the target command. I can't get your example
 working.

 C:\Users\mKoch\Desktop>c:\ffmpeg\ffmpeg -f lavfi -i
 color=red:size=vga:duration=
 6 -f lavfi -i color=green:size=vga:duration=6 -lavfi
 streamselect at my=inputs=2:ma
 p=0,sendcmd='5.0 streamselect at my map 1' -y out.mp4
 ffmpeg version git-2020-02-09-5ad1c1a Copyright (c) 2000-2020 the FFmpeg
 develop
 ers
   built with gcc 9.2.1 (GCC) 20200122
   configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-
 fontconfi
 g --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d
 --enable-libb
 luray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb
 --enab
 le-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-
 libshine --e
 nable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame
 --enable
 -libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-
 libx265 -
 -enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp
 --enab
 le-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-
 libmysofa --en
 able-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-
 ffnvcode
 c --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-
 dxva2 -
 -enable-avisynth --enable-libopenmpt --enable-amf
   libavutil      56. 39.100 / 56. 39.100
   libavcodec     58. 68.100 / 58. 68.100
   libavformat    58. 38.100 / 58. 38.100
   libavdevice    58.  9.103 / 58.  9.103
   libavfilter     7. 75.100 /  7. 75.100
   libswscale      5.  6.100 /  5.  6.100
   libswresample   3.  6.100 /  3.  6.100
   libpostproc    55.  6.100 / 55.  6.100
 Input #0, lavfi, from 'color=red:size=vga:duration=6':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 640x480
 [SAR 1:1
 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 Input #1, lavfi, from 'color=green:size=vga:duration=6':
   Duration: N/A, start: 0.000000, bitrate: N/A
     Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 640x480
 [SAR 1:1
 DAR 4:3], 25 tbr, 25 tbn, 25 tbc
 [NULL @ 0000000003203040] Unable to find a suitable output format for
 'streamsel
 ect at my'
 streamselect at my: Invalid argument

--
Ticket URL: <https://trac.ffmpeg.org/ticket/8520#comment:10>
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