[mdlug] Does anyone know how to debug ffmpeg screen (and audio) capture?

[Bob]

run ffmpeg -formats

this will tell you what formats and devices are supported on your system

Bob Dion

On 05/02/2017 06:14 PM, Dr. Robert Meier wrote:
> online tutors,
>
> Has anyone captured dynamic sound and x11 display using ffmpeg?
>
> Can anyone help me debug dynamic sound and x11 display capture?
>
> My basic command is
>
> ffmpeg -f alsa -ac 2 -acodec pcm_s16le
>        -f x11grab -vcodec libx264 -r 24 -s 1440x900
>        -i :0.0 -threads 0 ~/Class_20170411.avi
>
> My symptoms are
>   absence of sound and poor video color depth
>
> I suspect that my configuration choices are incorrect
>     alsa - how do I determine if I have alsa,
>                or determine what audio system I have
>     -ac 2 - how do I determine the correct channel
>         or determine what channels are available
>     x11grab - how do I determine if I can record direct
>           or determine what direct system I have
>     libx264 - how do I determine what codecs are compatible
>
> Any help would be appreciated.
>
> -- 
> Bob
>
> Dr. Robert Meier
> mailto:president at mdlug.org
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