On Sun, May 8, 2011 at 12:00 PM, <meino.cra...@gmx.de> wrote: > Hi, > > may be one can help me... > > I am using a webcam (lsusb: Bus 001 Device 002: ID 1415:2000 Nam Tai > E&E Products Ltd. or OmniVision Technologies, Inc. Sony Playstation > Eye) on my window board to capture videos from the crow, which often > visits me in summer. > > The PS-Eye cam has one (four?) microphones to capture audio and > delivers up to 60 fps. > > The setup was working last summer with video AND audio. > > This summer only video is captured. The resulting video file > seems to contain a "null audio" (no sound samples other than > zeroes...) > > When playing the file with mplayer, this is the output on the terminal > (the video plays ok beside the fact that there is no sound to hear...) > > [aviheader] Video stream found, -vid 0 > [aviheader] Audio stream found, -aid 1 > > Badly interleaved AVI file detected - switching to -ni mode... > AVI: No audio stream found -> no sound. > VIDEO: [MJPG] 640x480 24bpp 60.094 fps 29695.7 kbps (3625.0 > kbyte/s) > Clip info: > Title: > Software: guvcview-1.4.5 > Comments: Sun May 8 09:51:35 2011 > > ========================================================================== > Opening video decoder: [ffmpeg] FFmpeg's libavcodec codec family > Selected video codec: [ffmjpeg] vfm: ffmpeg (FFmpeg MJPEG) > > ========================================================================== > > ========================================================================== > Opening audio decoder: [pcm] Uncompressed PCM audio decoder > AUDIO: 44100 Hz, 1 ch, s16le, 705.6 kbit/100.00% (ratio: 88200->88200) > Selected audio codec: [pcm] afm: pcm (Uncompressed PCM) > > ========================================================================== > AO: [alsa] 48000Hz 1ch s16le (2 bytes per sample) > Starting playback... > Movie-Aspect is undefined - no prescaling applied. > VO: [gl2] 640x480 => 640x480 Planar 422P > [gl2] You have OpenGL >= 1.2 capable drivers, GOOD (16bpp and BGR is > ok!) > [gl2] antialiasing off > [gl2] bilinear linear > A: -0.0 V: 1.3 A-V: -1.265 ct: -0.126 77/ 77 14% 88% 0.0% 0 0 > Capturing not enabled (forgot -capture parameter?) > A: -0.0 V: 14.8 A-V:-14.844 ct: -1.486 893/893 10% 89% 0.0% 0 0 > > What can I do/check/test/experiment to get back the audio again....? > > Thank you very much for any help in advance! > > Have a nice sunday! > Best regards > mcc > > > From your output it shows that the sound is not null. Does your sound works playing other files (alsamixer)? Can you record now a picture with the webcam and play it with sound after?
Kfir
