On Thu, Oct 23, 2014 at 12:29:43PM -0400, David J Patrick wrote: > Hi Entaglers, this is my first post to the dev list, but almost certainly > not my last. > > I'm a freelance filmmaker with a Canon t4i DSLR, and I've been tinkering > with entagle for a year or so. I really like it in concept, and as I'm a > dyed-in-the-wool linux user, it's really my only option, to see what I'm > shooting on my linux laptop. > > However, I had a gig last week, and tried to use entangle in a "production > environment, and it failed me in a big way. The first issue is that I can > not Preview with the camera "rolling", so it's not usable for the Director > to watch while I shoot.
Yes, that is a limitation of the gphoto2 API we're using in Entangle. It provides us the ability to download still images or video files after they are captured. It lets us request "live view" previews. It lets us start / stop video recording (not wired up in entangle). It does not, however, provide anything /while/ the camera is recording. I'm unclear whether that's a limitation of gphoto2 itself, or a limitation of the PTP protocol that is used. Either way there's unfortunately nothing entangle can do to let you monitor the video as it is being recorded, as you would be able todo with a webcam for example :-( > The second big issue is that the Preview is of the > camera (raw?) image, and it looks great as a still, but really > misrepresents what I'm going to get on the video. Not only shows the wrong > resolution (hiding niose, moire, etc. but the color representation is WAY > off! (thank goodness for color-correction) The preview we capture is literally the same as the camera would show on the LCD screen on the rear. This is usually a pretty low quality JPEG files IIUC. Certainly it is low resolution compared to the normal captured images. I'm not sure how it compares to stills from a video frame though - I would probably expect the live view to be comparable to a still from a video file since the camera video mode is implemented by basically recording the live view images. > I can deal with the low refresh/ frame-rate, understanding the limits of > the USB connection, but I would be really really happy to use entangle for > professional video, eventually.. > > Any chance of support for us movie-makers?? I'm afraid I don't have any good answers for the problems you face, since AFAICT, they are all outside of our control - either Camera or gphoto2 limitations. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| _______________________________________________ Entangle-devel mailing list Entangle-devel@gna.org https://mail.gna.org/listinfo/entangle-devel
