Hi all, we rolled out our matterhorn clients to the lecture rooms, just to discover what we did not think about when testing:
It is rather reproducible, that when we record/capture a lecture, the capture of the screen will get corrupted, if we switch the input devices AND those devices deliver different resolutions or need some time to switch between. The resulting Screen.mpg will show OK till about 2-3 seconds after switching to a "bad" device. "Bad" means, if I'm not mistaken, it delivers some non-standard resolution like for example 1400x1050. Concrete device at hand is "Elmo L-1ex" visualizer, which creates problems on switching. And after these 2-3 seconds, the captured file will show "white snow" in the lower left corner and some big stripes with test colors (white, yellow, green, red, blue, as seen in http://derpi.tuwien.ac.at/krieger/Screen.mpg) in the rest of the picture; which I take to be interpreted as "the software somehow lost track of where the frames are". Funny thing is, that in the matterhorn media representation (media gallery, final result after processing on the server), I do see those colors and white snow, but at the end of the playback the picture will switch back to some picture of the "past", but no moving. Since I am no multimedia expert, I can just guess what is happening. What do you think, and which advices can I follow to reduce this problem, and have you experienced similar problems ? Thanks, Andreas -- View this message in context: http://opencast.3480289.n2.nabble.com/Screen-recording-switching-between-devices-causes-corruption-tp6081708p6081708.html Sent from the Matterhorn Users mailing list archive at Nabble.com. _______________________________________________ Matterhorn-users mailing list [email protected] http://lists.opencastproject.org/mailman/listinfo/matterhorn-users
