Using "-f v4l2" produces the following output on the log:
2021-06-30 18:10:55.605 http: 192.168.0.129: using ticket 3CA8B68F424F459A44FA6C658B14548C2446DE1C for /stream/mux/425aab677bd472f8175a4cc3718f1c11
2021-06-30 18:10:55.606 mpegts: WebCam in Camera - tuning on IPTV
2021-06-30 18:10:55.617 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:10:55.618 subscription: 0003: "HTTP" subscribing to mux "WebCam", weight: 10, adapter: "IPTV", network: "Camera", service: "Raw PID Subscription", hostname="192.168.0.129", client="VLC/3.0.7.1 LibVLC/3.0.7.1"
2021-06-30 18:10:56.303 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:10:56.303 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:10:56.303 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:10:56.307 spawn: WARNING: library configuration mismatch
2021-06-30 18:10:56.307 spawn: avutil configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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-ope
2021-06-30 18:10:56.320 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:10:56.320 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:10:56.320 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:10:56.320 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:10:56.320 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:10:56.320 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:10:56.320 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:10:56.320 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:10:56.320 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:10:59.468 spawn: Input #0, video4linux2,v4l2, from '/dev/video0':
2021-06-30 18:10:59.468 spawn: Duration: N/A, start: 115.045855, bitrate: 298598 kb/s
2021-06-30 18:10:59.469 spawn: Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 298598 kb/s, 9 fps, 9 tbr, 1000k tbn, 1000k tbc
2021-06-30 18:10:59.474 spawn: [NULL @ 0xc87be0] Unable to find a suitable output format for 'pipe:1'
2021-06-30 18:10:59.474 spawn: pipe:1: Invalid argument
2021-06-30 18:10:59.656 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:11:00.097 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:11:00.097 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:11:00.097 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:11:00.097 spawn: WARNING: library configuration mismatch
2021-06-30 18:11:00.097 spawn: avutil configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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-ope
2021-06-30 18:11:00.098 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:11:00.098 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:11:00.098 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:11:00.098 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:11:00.098 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:11:00.098 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:11:00.098 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:11:00.098 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:11:00.098 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:11:03.070 spawn: Input #0, video4linux2,v4l2, from '/dev/video0':
2021-06-30 18:11:03.070 spawn: Duration: N/A, start: 118.690921, bitrate: 298598 kb/s
2021-06-30 18:11:03.071 spawn: Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 298598 kb/s, 9 fps, 9 tbr, 1000k tbn, 1000k tbc
2021-06-30 18:11:03.072 spawn: [NULL @ 0xb82be0] Unable to find a suitable output format for 'pipe:1'
2021-06-30 18:11:03.072 spawn: pipe:1: Invalid argument
2021-06-30 18:11:03.155 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:11:03.611 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:11:03.611 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:11:03.611 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:11:03.611 spawn: WARNING: library configuration mismatch
2021-06-30 18:11:03.612 spawn: avutil configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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-ope
2021-06-30 18:11:03.612 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:11:03.612 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:11:03.612 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:11:03.612 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:11:03.612 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:11:03.612 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:11:03.612 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:11:03.612 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:11:03.612 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:11:06.591 spawn: Input #0, video4linux2,v4l2, from '/dev/video0':
2021-06-30 18:11:06.591 spawn: Duration: N/A, start: 122.211974, bitrate: 298598 kb/s
2021-06-30 18:11:06.592 spawn: Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 298598 kb/s, 9 fps, 9 tbr, 1000k tbn, 1000k tbc
2021-06-30 18:11:06.592 spawn: [NULL @ 0x2399be0] Unable to find a suitable output format for 'pipe:1'
2021-06-30 18:11:06.592 spawn: pipe:1: Invalid argument
2021-06-30 18:11:06.678 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:11:07.117 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:11:07.117 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:11:07.117 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:11:07.117 spawn: WARNING: library configuration mismatch
2021-06-30 18:11:07.117 spawn: avutil configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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-ope
2021-06-30 18:11:07.118 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:11:07.118 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:11:07.118 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:11:07.118 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:11:07.118 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:11:07.118 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:11:07.118 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:11:07.118 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:11:07.118 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:11:10.091 spawn: Input #0, video4linux2,v4l2, from '/dev/video0':
2021-06-30 18:11:10.091 spawn: Duration: N/A, start: 125.712015, bitrate: 298598 kb/s
2021-06-30 18:11:10.092 spawn: Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 298598 kb/s, 9 fps, 9 tbr, 1000k tbn, 1000k tbc
2021-06-30 18:11:10.093 spawn: [NULL @ 0x1c63be0] Unable to find a suitable output format for 'pipe:1'
2021-06-30 18:11:10.093 spawn: pipe:1: Invalid argument
2021-06-30 18:11:10.177 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:11:10.629 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:11:10.630 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:11:10.630 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:11:10.630 spawn: WARNING: library configuration mismatch
2021-06-30 18:11:10.631 spawn: postproc configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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-ope
2021-06-30 18:11:10.631 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:11:10.631 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:11:10.631 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:11:10.631 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:11:10.631 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:11:10.632 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:11:10.632 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:11:10.632 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:11:10.632 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:11:11.607 subscription: 0003: service instance is bad, reason: No input detected
2021-06-30 18:11:14.607 subscription: 0003: No input source available for subscription "HTTP" to mux "WebCam in Camera"
2021-06-30 18:11:14.607 webui: Couldn't start streaming /stream/mux/425aab677bd472f8175a4cc3718f1c11?ticket=3CA8B68F424F459A44FA6C658B14548C2446DE1C, No input detected
Changing it to "-f mpegts" produces the following:
2021-06-30 18:16:19.761 http: 192.168.0.129: using ticket 05F6F71C7780FBCA058C2166D3F19FCD4E61AF0C for /stream/mux/425aab677bd472f8175a4cc3718f1c11
2021-06-30 18:16:19.763 mpegts: WebCam in Camera - tuning on IPTV
2021-06-30 18:16:19.774 subscription: 000B: "HTTP" subscribing to mux "WebCam", weight: 10, adapter: "IPTV", network: "Camera", service: "Raw PID Subscription", hostname="192.168.0.129", client="VLC/3.0.7.1 LibVLC/3.0.7.1"
2021-06-30 18:16:19.774 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:16:20.247 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:16:20.247 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:16:20.247 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:16:20.247 spawn: WARNING: library configuration mismatch
2021-06-30 18:16:20.247 spawn: avutil configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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-ope
2021-06-30 18:16:20.249 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:16:20.249 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:16:20.249 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:16:20.249 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:16:20.249 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:16:20.249 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:16:20.249 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:16:20.249 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:16:20.249 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:16:23.308 spawn: Input #0, video4linux2,v4l2, from '/dev/video0':
2021-06-30 18:16:23.308 spawn: Duration: N/A, start: 438.927894, bitrate: 298598 kb/s
2021-06-30 18:16:23.308 spawn: Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 298598 kb/s, 9 fps, 9 tbr, 1000k tbn, 1000k tbc
2021-06-30 18:16:23.309 spawn: [NULL @ 0x164f020] Unable to find a suitable output format for 'pipe:1'
2021-06-30 18:16:23.309 spawn: pipe:1: Invalid argument
2021-06-30 18:16:23.398 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:16:23.837 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:16:23.838 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:16:23.838 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:16:23.838 spawn: WARNING: library configuration mismatch
2021-06-30 18:16:23.838 spawn: avutil configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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-ope
2021-06-30 18:16:23.839 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:16:23.839 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:16:23.839 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:16:23.839 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:16:23.839 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:16:23.840 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:16:23.840 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:16:23.840 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:16:23.840 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:16:26.813 spawn: Input #0, video4linux2,v4l2, from '/dev/video0':
2021-06-30 18:16:26.814 spawn: Duration: N/A, start: 442.433863, bitrate: 298598 kb/s
2021-06-30 18:16:26.814 spawn: Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 298598 kb/s, 9 fps, 9 tbr, 1000k tbn, 1000k tbc
2021-06-30 18:16:26.815 spawn: [NULL @ 0x18c5020] Unable to find a suitable output format for 'pipe:1'
2021-06-30 18:16:26.815 spawn: pipe:1: Invalid argument
2021-06-30 18:16:26.899 spawn: Executing "/usr/bin/ffmpeg"
2021-06-30 18:16:27.344 spawn: ffmpeg version 4.1.6-1~deb10u1+rpt2 Copyright (c) 2000-2020 the FFmpeg developers
2021-06-30 18:16:27.344 spawn: built with gcc 8 (Raspbian 8.3.0-6+rpi1)
2021-06-30 18:16:27.344 spawn: configuration: --prefix=/usr --extra-version='1~deb10u1+rpt2' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --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
2021-06-30 18:16:27.344 spawn: WARNING: library configuration mismatch
2021-06-30 18:16:27.345 spawn: libavutil 56. 22.100 / 56. 22.100
2021-06-30 18:16:27.346 spawn: libavcodec 58. 35.100 / 58. 35.100
2021-06-30 18:16:27.346 spawn: libavformat 58. 20.100 / 58. 20.100
2021-06-30 18:16:27.346 spawn: libavdevice 58. 5.100 / 58. 5.100
2021-06-30 18:16:27.346 spawn: libavfilter 7. 40.101 / 7. 40.101
2021-06-30 18:16:27.346 spawn: libavresample 4. 0. 0 / 4. 0. 0
2021-06-30 18:16:27.346 spawn: libswscale 5. 3.100 / 5. 3.100
2021-06-30 18:16:27.346 spawn: libswresample 3. 3.100 / 3. 3.100
2021-06-30 18:16:27.346 spawn: libpostproc 55. 3.100 / 55. 3.100
2021-06-30 18:16:30.320 spawn: Input #0, video4linux2,v4l2, from '/dev/video0':
2021-06-30 18:16:30.321 spawn: Duration: N/A, start: 445.940866, bitrate: 298598 kb/s
2021-06-30 18:16:30.321 spawn: Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 298598 kb/s, 9 fps, 9 tbr, 1000k tbn, 1000k tbc
2021-06-30 18:16:30.322 spawn: [NULL @ 0xeac020] Unable to find a suitable output format for 'pipe:1'
Still no video output. Do you have any other hints? Or am I missing something?
Tks