[FFmpeg-user] ffmpeg binary audio error

[Dennis Mungai]

On Mon, 15 Nov 2021, 23:12 Mahmoud Elgohary, <
mahmoud.elgohary at teqnia-tech.com> wrote:

> Hi every one,
>
>
>
>
>
> I'm try to use ffmpeg binary to record video from webcam and audio with
> this command
>
> ffmpeg -f alsa -ac 2 -i default -itsoffset '00:00:00.5' -f video4linux2 -s
> 320x240 -r 25 -i /dev/video0 'temp.mp4'"
>
>
>
> but get this error
>
> ALSA lib ../../src/conf.c:3725:(snd_config_hooks_call) Cannot open shared
> library libasound_module_conf_pulse.so
> (/usr/lib/alsa-lib/libasound_module_conf_pulse.so: cannot open shared
> object file: No such file or directory) ALSA lib
> ../../../src/pcm/pcm.c:2660:(snd_pcm_open_noupdate) Unknown PCM default
> [alsa @ 0x6342e00] cannot open audio device default (No such file or
> directory) default: Input/output error
>
> also I user ffmpeg to run it and run , any advice
>
>
>
> Mahmoud Elgohary
>
> CEO, Founder Of Teqnia tech
>
> Teqnia-Tech
>
>
> Mobile:+2 0100 6395 340
>
> Email : mailto:Mahmoud.Elgohary at edusofteg.com
>
> Website :
>
> Address:  57A Intersection of 10 St with Demashk St El Maadi, Cairo
> Governorate, Egypt
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See this https://trac.ffmpeg.org/wiki/Capture/ALSA

>