DopeLabs, Thanks for the advice, Unfortunately, I have tried both suggestions to no avail. No sure if i mentioned it but both webcams are the same make and model (Logitech 920) I change the names initially as i figured two cams with the same name was the issue. Any further suggestions would be greatly appreciated as the current program I am using to view both camera is a CPU hog.
Thanks, Frank On Tue, May 22, 2018 at 12:57 PM, DopeLabs <[email protected]> wrote: > you could try using the alternate names.. examples are shown here > > https://www.ffmpeg.org/ffmpeg-devices.html#dshow > > > is it always that specific camera? > > if you connect the one that isnt working first so that its listed as #1, > will it work? > > have you tried connecting the 2nd camera to a separate USB bus? > > you can use the following tool to get usb bus info on your system > > https://github.com/Microsoft/Windows-driver-samples/tree/ > master/usb/usbview > > > > > On May 22, 2018, at 9:35 03AM, Frank Belson <[email protected]> > wrote: > > > > The following is the output from ffmpeg -list_devices true -f dshow -i > dummy > > > > ffmpeg version N-87353-g183fd30 Copyright (c) 2000-2017 the FFmpeg > > developers > > built with gcc 7.2.0 (GCC) > > configuration: --enable-gpl --enable-version3 --enable-cuda > > --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx > > --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig > > --enable-frei0r --enable-gnutls --enable-iconv --enable-libass > > --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype > > --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug > > --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb > > --enable-libopenh264 --enable-libopenjpeg --enable-libopus > --enable-librtmp > > --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora > > --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc > > --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp > > --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid > > --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib > > libavutil 55. 76.100 / 55. 76.100 > > libavcodec 57.106.101 / 57.106.101 > > libavformat 57. 82.101 / 57. 82.101 > > libavdevice 57. 8.101 / 57. 8.101 > > libavfilter 6.105.100 / 6.105.100 > > libswscale 4. 7.103 / 4. 7.103 > > libswresample 2. 8.100 / 2. 8.100 > > libpostproc 54. 6.100 / 54. 6.100 > > [dshow @ 00000000002f6c00] DirectShow video devices (some may be both > video > > and audio devices) > > [dshow @ 00000000002f6c00] "Logitech Cam#1" > > [dshow @ 00000000002f6c00] Alternative name > > "@device_pnp_\\?\usb#vid_046d&pid_082d&mi_00#6&10047afe&0& > 0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\{bbefb6c7-2fc4- > 4139-bb8b-a58bba724083}" > > [dshow @ 00000000002f6c00] "Logitech Cam#2" > > [dshow @ 00000000002f6c00] Alternative name > > "@device_pnp_\\?\usb#vid_046d&pid_082d&mi_00#6&3a78d907&0& > 0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global" > > [dshow @ 00000000002f6c00] "Kodak S101 Webcam" > > [dshow @ 00000000002f6c00] Alternative name > > "@device_pnp_\\?\usb#vid_0979&pid_0206&mi_00#6&2455fd16&0& > 0000#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global" > > [dshow @ 00000000002f6c00] DirectShow audio devices > > [dshow @ 00000000002f6c00] "Microphone (4- Kodak S101 Micro" > > [dshow @ 00000000002f6c00] Alternative name > > "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (4- Kodak > > S101 Micro" > > [dshow @ 00000000002f6c00] "Line (WsAudio_Device)" > > [dshow @ 00000000002f6c00] Alternative name > > "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Line > (WsAudio_Device)" > > [dshow @ 00000000002f6c00] "Microphone (2- HD Pro Webcam C9" > > [dshow @ 00000000002f6c00] Alternative name > > "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (2- HD Pro > > Webcam C9" > > [dshow @ 00000000002f6c00] "Microphone (HD Pro Webcam C920)" > > [dshow @ 00000000002f6c00] Alternative name > > "@device_cm_{33D9A762-90C8-11D0-BD43-00A0C911CE86}\Microphone (HD Pro > > Webcam C920)" > > dummy: Immediate exit requested > > > > > > On Tue, May 22, 2018 at 6:59 AM, DopeLabs <[email protected]> wrote: > > > >> what is the output of > >> > >> $ ffmpeg -list_devices true -f dshow -i dummy > >> > >> > >> if you have multiple entries of a webcam named "Logitech Cam", you can > >> specify which using -video_device_number > >> > >> the following would select the 2nd identical device (as numbers for > >> devices start at 0) > >> > >> $ ffmpeg -f dshow -video_device_number 1 -i video="Logitech Cam" > >> > >> > >> im also curious.. would this work? video="Logitech Cam#0" > >> > >> (please include complete uncut console output) > >> > >> running the latest version of ffmpeg? > >> > >> > >>> On May 19, 2018, at 3:34 17PM, Brenda Spinner <[email protected] > > > >> wrote: > >>> > >>> I am using the following line to preview my webcam: > >>> > >>> ffmpeg -s 1280x720 -framerate 30 -pix_fmt yuv420p -rtbufsize 100MB -f > >> dshow > >>> -i video="Logitech Cam#1" -c:v copy -an -f sdl "WebCAM Preview" > >>> > >>> this line works fine with cam #1, however when try it with cam #2, I > get > >>> the error: > >>> > >>> [dshow @ 00000000002d8920] Could not set video options video=Logitech > >>> Cam#2: I/O error > >>> > >>> Can anyone tell me why this is happening. I would like to able to > preview > >>> both webcams at the same time? > >>> > >>> Thanks, Frank > >>> > >>> <https://www.avast.com/sig-email?utm_medium=email&utm_ > >> source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=icon> > >>> Virus-free. > >>> www.avast.com > >>> <https://www.avast.com/sig-email?utm_medium=email&utm_ > >> source=link&utm_campaign=sig-email&utm_content=webmail&utm_term=link> > >>> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > >>> _______________________________________________ > >>> ffmpeg-user mailing list > >>> [email protected] > >>> http://ffmpeg.org/mailman/listinfo/ffmpeg-user > >>> > >>> To unsubscribe, visit link above, or email > >>> [email protected] with subject "unsubscribe". > >> > >> _______________________________________________ > >> ffmpeg-user mailing list > >> [email protected] > >> http://ffmpeg.org/mailman/listinfo/ffmpeg-user > >> > >> To unsubscribe, visit link above, or email > >> [email protected] with subject "unsubscribe". > >> > > _______________________________________________ > > ffmpeg-user mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > > > To unsubscribe, visit link above, or email > > [email protected] with subject "unsubscribe". > > _______________________________________________ > ffmpeg-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/ffmpeg-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". > _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
