[FFmpeg-user] webm muxer (-f webm) seems slow

[Jun Jie Pang]

On Wed, Feb 12, 2014 at 9:36 PM, Carl Eugen Hoyos <cehoyos at ag.or.at> wrote:

> Jun Jie Pang <junjiepang <at> gmail.com> writes:
>
> > $ ffmpeg -f x11grab -framerate 60 -s 1280x720 -i :2.0
> > -vcodec libvpx -vb 1500k -minrate 1500k -maxrate 1500k
> > -threads 11 -rt_bufsize 0 -bufsize 0 -deadline realtime
> > -cpu-used -5 -threads 11 -fflags nobuffer -avioflags
> > direct -max_delay 0 -muxdelay 0 -muxpreload 0 -f webm -
>
> Is muxing webm slow or using the libvpx encoder?
>
> Carl Eugen
>
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  From the time stamps generated on the console by ffmpeg, the libvpx
encoder seems to be encoding near real time (visual inspection with a
timer). There isn't a visible 1-2 seconds lag that I was experiencing on
the client. So I'm guessing its the muxing of webm.

Thank you,
Regards,
Jun Jie