Am 07.10.2022 um 20:28 schrieb Michael Koch:
Am 07.10.2022 um 19:32 schrieb [email protected]:
i have 2 inputs
first input image -i logo.png
second input dshow webcam -f dshow -i video="my webcam"
is it possible to show 5 seconds logo and and subsequently start webcam?
it can also be done with "streamselect" filter, have a look at the
documentation for an example.
I haven't yet found a working example for sendcmd / streamselect.
What's the problem in this command line?
ffmpeg -re -f lavfi -i color=red:s=1280x720 -f lavfi -i
testsrc2=s=1280x720 -lavfi sendcmd='5.0 streamselect map
1';[0][1]streamselect=map=0 -f sdl2 -
The error message is "Unable to find a suitable output format for
'streamselect' "
I'm not sure what's the meaning of this message. Does it mean
a) The previous filter has no suitable output format for the input of
the streamselect filter
or
b) The streamselect filter has no suitable output format for the next
filter?
The console output is below.
Michael
C:\Users\astro\Desktop\test>ffmpeg -re -f lavfi -i color=red:s=1280x720
-f lavfi -i testsrc2=s=1280x720 -lavfi sendcmd='5.0 streamselect map
1';[0][1]streamselect=map=0 -f sdl2 -
ffmpeg version 2022-10-02-git-5f02a261a2-essentials_build-www.gyan.dev
Copyright (c) 2000-2022 the FFmpeg developers
built with gcc 12.1.0 (Rev2, Built by MSYS2 project)
configuration: --enable-gpl --enable-version3 --enable-static
--disable-w32threads --disable-autodetect --enable-fontconfig
--enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp
--enable-bzlib --enable-lzma --enable-zlib --enable-libsrt
--enable-libssh --enable-libzmq --enable-avisynth --enable-sdl2
--enable-libwebp --enable-libx264 --enable-libx265 --enable-libxvid
--enable-libaom --enable-libopenjpeg --enable-libvpx
--enable-mediafoundation --enable-libass --enable-libfreetype
--enable-libfribidi --enable-libvidstab --enable-libvmaf
--enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid
--enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va
--enable-dxva2 --enable-libmfx --enable-libgme --enable-libopenmpt
--enable-libopencore-amrwb --enable-libmp3lame --enable-libtheora
--enable-libvo-amrwbenc --enable-libgsm --enable-libopencore-amrnb
--enable-libopus --enable-libspeex --enable-libvorbis --enable-librubberband
libavutil 57. 38.100 / 57. 38.100
libavcodec 59. 49.100 / 59. 49.100
libavformat 59. 33.100 / 59. 33.100
libavdevice 59. 8.101 / 59. 8.101
libavfilter 8. 49.100 / 8. 49.100
libswscale 6. 8.112 / 6. 8.112
libswresample 4. 9.100 / 4. 9.100
libpostproc 56. 7.100 / 56. 7.100
Input #0, lavfi, from 'color=red:s=1280x720':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #0:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR
16:9], 25 fps, 25 tbr, 25 tbn
Input #1, lavfi, from 'testsrc2=s=1280x720':
Duration: N/A, start: 0.000000, bitrate: N/A
Stream #1:0: Video: wrapped_avframe, yuv420p, 1280x720 [SAR 1:1 DAR
16:9], 25 fps, 25 tbr, 25 tbn
[NULL @ 0000023291ccd4c0] Unable to find a suitable output format for
'streamselect'
streamselect: Invalid argument
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