Hello,
I would like to use an old webcam for webrtc with firefox. My Firefox (86.6.0esr, latest on CentOS 7) aborts before playing the webcam. As far as I know, firefox uses ffmpeg for video playback. So I kindly ask this mailing list for some advice.
I can play the webcam (TerraCAM USB Pro) with "vlc v4l2:///dev/video0", but
"ffmpeg -f v4l2 -i /dev/video0" throws :
...
[video4linux2,v4l2 @ 0xcb3a500] Cannot find a proper format for codec 'none' (id 0), pixel format 'none' (id -1)
Assertion *codec_id != AV_CODEC_ID_NONE failed at src/libavdevice/v4l2.c:815
Assertion *codec_id != AV_CODEC_ID_NONE failed at src/libavdevice/v4l2.c:815
"v4l2-ctl --list-formats-ext" shows Omnivision chipset OV518 with special compression format :
ioctl: VIDIOC_ENUM_FMT
Index : 0
Type : Video Capture
Pixel Format: 'O518' (compressed)
Name : GSPCA OV518
Size: Discrete 320x240
Size: Discrete 640x480
Index : 0
Type : Video Capture
Pixel Format: 'O518' (compressed)
Name : GSPCA OV518
Size: Discrete 320x240
Size: Discrete 640x480
"ffmpeg -f -v4l2 -list_formats all -i /dev/video0" shows, that this format is not supported :
ffmpeg version 4.2.2-static https://johnvansickle.com/ffmpeg/ Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
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
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
[video4linux2,v4l2 @ 0xc482600] Compressed: Unsupported : GSPCA OV518 : 320x240 640x480
/dev/video0: Immediate exit requested
built with gcc 8 (Debian 8.3.0-6)
configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gmp --enable-libgme --enable-gray --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
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
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
[video4linux2,v4l2 @ 0xc482600] Compressed: Unsupported : GSPCA OV518 : 320x240 640x480
/dev/video0: Immediate exit requested
As you see, I am using latest ffmpeg static build. I also tried an own build, but so far without success.
So, how can I get this webcam running (hopefully for firefox, too)?
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