Hi, Maybe you can try FFmmpeg, see here<http://ubuntuforums.org/showthread.php?t=1392026> .
2011/3/26 Ian Malone <ibmal...@gmail.com> > Hi, > > I'm trying to record from a webcam and getting terrible performance > from Cheese and problematic performance from VLC. Is anyone able to > either tell me how to get one of them working properly or suggest > another app that will work? Details (hardware at bottom) > > Cheese cheese-2.30.1-1.fc13.x86_64, nice, simple to use. Recording > performance is awful. The booth framerate is fine, but as soon as I > start recording it drops dramatically (going from frames per second to > seconds per frame). VLC's ability to encode to the same target - > Theora/Vorbis (but see below) and the fact I can do this under windows > with the movie maker suggest a Cheese problem. Resolution is at > 640x480 (which is what VLC and move maker are using), dropping to > 355x288 is okay. This cheese bug seems to be related > https://bugzilla.gnome.org/show_bug.cgi?id=564957 but not resolved. > Anyone using F14 with good performance for cheese video recording? > > VLC vlc-1.1.7-1.fc13.x86_64. Less friendly, for a start I haven't been > able to get it to capture by specifying devices in the capture dialog. > If I just open capture and hit play I get video and sound. I can use > /dev/video0 as the video input and after a bit of trial and error > (using debug mode I realise it was using alsa device names) pulse for > the audio device, but if I attempt to use the capture device advance > options (with or without specifying /dev/video0): > Your input can't be opened: > VLC is unable to open the MRL 'v4l2://'. Check the log for details. > > ~/.xsession-errors has this: > [0x7f2dfc0044e0] v4l2 demux error: invalid tuner -1. > [0x7f2dfc008240] v4l2 access error: invalid tuner -1. > [0x7f2e08008590] main input error: open of `v4l2://' failed: (null) > > (Or tuner 0 which is what it defaults to, tried -1 as this appears to > be auto for other params) > > But capturing to theora/vorbis results in video and audio playing at > different speeds, the default (which seems to be the ALSA hw device) > has video faster than audio, capturing to the default (mp4) or webm is > okay, using pulse and /dev/video0 webm video is slower than audio... > and so on. This most successful approach so far is to open the device > in play mode, use the 'advanced controls' record button and capture > uncompressed a/v to avi the transcode later. This would be sort of > endurable, but it would be nice to record transcoded and be able to > adjust the recorded size (camera can go up to 1280x720). I'd also like > to be able record both soundcard and webcam audio and video, but it > looks like that will never happen with Cheese and may be difficult > with VLC, so I may have to accept recording one separately and syncing > up later. > > AMD Athlon X2 5000+ cpu, 2GB RAM > > Logitech C270HD cam: > uvcvideo: Found UVC 1.00 device <unnamed> (046d:0825) > input: UVC Camera (046d:0825) as > /devices/pci0000:00/0000:00:0b.1/usb1/1-6/1-6:1.0/input/input5 > usbcore: registered new interface driver uvcvideo > > Thanks for your time, > -- > imalone > -- > users mailing list > users@lists.fedoraproject.org > To unsubscribe or change subscription options: > https://admin.fedoraproject.org/mailman/listinfo/users > Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines > -- Guohua Tang Research Center for Information Retrieval, Harbin Institute of Technology ir.hit.edu.cn/~tangguohua --- icycandy.com
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