[vlc] vlc webcam capture audio sync

Dotan Cohen dotancohen at gmail.com
Thu Feb 19 00:25:32 CET 2009


2009/2/19 RUMI Szabolcs <rumi_ml at rtfm.hu>:
> Hello!
>
> I'm trying to capture with a webcam using vlc under Linux
> and transcode into a file.
>
> I'm using the camera's own microphone as the audio source
> which appears as /dev/dsp1 using the usb-audio driver while
> the camera is /dev/video0 with the gspca-zc3xx v4l2 driver.
>
> When capturing, the video is significantly lagged behind
> the audio (~1s) and the delay even seems to be changing so
> I'm afraid even this wouldn't help even if it worked:
>
> http://trac.videolan.org/vlc/ticket/2461
>
> This also happens if I do not transcode, just use the
> camera's own JPEG chroma and mux it with the audio
> coming from the mic.
>
> Any ideas or hints in fixing this?
>

Which commands / settings are you using in VLC? Which version of VLC?
Which webcam? Can you check with another program (Cheese, Camorama)
that there is not a delay in the video / audio as output by your
combined webcam with the driver you are using?

-- 
Dotan Cohen

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