Bonjour, j'ai acquis depuis quelques mois un périphérique de capture vidéo sur usb2.
En essayant une capture sans le son l'image est fluide ça ne pose pas de problème.
Par contre avec le son l'image saccade énormément.
[desillu@computehard ~]$ mplayer tv:// -tv driver=v4l2:norm=PAL-60:audiorate=48000:immediatemode=0:forceaudio:alsa:adevice=hw.2,0:device=/dev/video1:input=0
MPlayer SVN-r31628-4.4.4 (C) 2000-2010 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.
Playing tv://.
TV file format detected.
Selected driver: v4l2
name: Video 4 Linux 2 input
author: Martin Olschewski <olschewski@zpr.uni-koeln.de>
comment: first try, more to come ;-)
Selected device: Pinnacle Dazzle DVC 90/100/101/
Capabilites: video capture audio read/write streaming
supported norms: 0 = NTSC; 1 = NTSC-M; 2 = NTSC-M-JP; 3 = NTSC-M-KR; 4 = NTSC-443; 5 = PAL; 6 = PAL-BG; 7 = PAL-H; 8 = PAL-I; 9 = PAL-DK; 10 = PAL-M; 11 = PAL-N; 12 = PAL-Nc; 13 = PAL-60; 14 = SECAM; 15 = SECAM-B; 16 = SECAM-G; 17 = SECAM-H; 18 = SECAM-DK; 19 = SECAM-L; 20 = SECAM-Lc;
inputs: 0 = Composite1; 1 = S-Video;
Current input: 0
Current format: YUYV
v4l2: ioctl set format failed: Invalid argument
v4l2: ioctl set format failed: Invalid argument
v4l2: ioctl set format failed: Invalid argument
Selected input hasn't got a tuner!
Video buffer shorter than 3 times audio frame duration.
You will probably experience heavy framedrops.
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
Failed to open VDPAU backend libvdpau_nvidia.so: cannot open shared object file: No such file or directory
[vdpau] Error when calling vdp_device_create_x11: 1
==========================================================================
Opening video decoder: [raw] RAW Uncompressed Video
Movie-Aspect is undefined - no prescaling applied.
VO: [xv] 640x480 => 640x480 Packed YUY2
video buffer full - dropping frame
Selected video codec: [rawyuy2] vfm: raw (RAW YUY2)
==========================================================================
==========================================================================
Opening audio decoder: [pcm] Uncompressed PCM audio decoder
AUDIO: 48000 Hz, 2 ch, s16le, 1536.0 kbit/100.00% (ratio: 192000->192000)
Selected audio codec: [pcm] afm: pcm (Uncompressed PCM)
==========================================================================
video buffer full - dropping frame
video buffer full - dropping frame
AO: [pulse] 48000Hz 2ch s16le (2 bytes per sample)
Starting playback...
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
A: 0.3 V: 0.1 A-V: 0.225 ct: 0.048 3/ 3 ??% ??% ??,?% 0 0
video buffer full - dropping frame
A: 0.4 V: 0.7 A-V: -0.317 ct: 0.048 4/ 4 0% 1% 54.3% 0 0
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
video buffer full - dropping frame
A: 0.6 V: 0.7 A-V: -0.190 ct: 0.048 4/ 4 0% 1% 54.3% 0 0