On 07/21/2014 06:33 AM, Len Ovens wrote: > On Sat, 19 Jul 2014, Robin Gareus wrote: > >> http://dvswitch.alioth.debian.org/wiki/ >> >> Can switch a couple of camera (DV) sources and is OSC remote >> controllable (the website is a tad out of date, but the source rocks) > > I thought I would try it out... > > There is also a dvsource-v4l2-dv for USB devices... Hmm, I have a Canon > eos 60d which will record nice videos that I can download and edit with > any sw... I can tether it with entangle and use that to fully control > the camera from my desktop, in preview mode I can see the live video > from the camera on my screen... but get it to show up as /dev/video* ? > not a chance. > dmesg shows: > [17678.621172] usb 3-7: new high-speed USB device number 8 using xhci_hcd > [17678.634428] usb 3-7: New USB device found, idVendor=04a9, idProduct=3215 > [17678.634437] usb 3-7: New USB device strings: Mfr=1, Product=2, > SerialNumber=0 > [17678.634442] usb 3-7: Product: Canon Digital Camera > [17678.634446] usb 3-7: Manufacturer: Canon Inc. Hi Len, That's just the usb stack detecting a device and reading the IDs. It does not load a driver to handle it. > Anything I can find suggests using a screen reader to get the live video > into the computer. screen reader? that sounds odd. A Video-Loopback can work: http://chdk.setepontos.com/index.php?topic=4672.0 suggests $ sudo modprobe vloopback $ V4L_DEVNAME=/dev/video0 canon-capture capture> start capture> v4l on It looks like the canon camera is not supported by the v4l2 driver. > (even for windows or mac) The built-in webcam on a macbook (running Linux) works OOTB with dvsource-v4l2-dv as does a cheap external USB webcam that I have (which just shows up as /dev/video) both also produce audio-feeds. For the real-thing(TM) I use firewire and camcorders or cameras. > Sounds silly. Am I missing something? There is no audio that way. Use a proper microphone, soundcard and `dvsource-jack` :) Though in our case we ended up using the audio from the first camera: Mics -> mixing-desk -> XLR -> camera 1 in. That way the audio was always in sync (thanks for firewire iso-synchroneous streams). dvsource-jack has options to calibrate latency, and align the A/V but it may drift when streaming over long periods of time if the soundcard is not word-clock synced with the camera. HTH, robin PS. For testing dvsource-file comes in handy for testing. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/listinfo/linux-audio-user
