[FFmpeg-user] fast video codec for screen casting

[dE .]

On 01/05/12 08:12, Carl Eugen Hoyos wrote:

> dE .<de.techno<at>   gmail.com>   writes:
>
>>> ffmpeg -f x11grab -s 1280x800 -i :0.0 -f null -
>> 30 FPS
> I get approximately the same performance with -vcodec mpeg1video, isn't that
> also true for you?
>
> [...]
No. I tend to think this's cause of bad ati drivers, X takes too much
CPU cause drivers are incapable of offloading load to the GPU.

I've another PC with a Nvidia GPU and a single core processor. Using
x264, I get 24 FPS easily.


>> I also tried ffmpeg -f x11grab -s 1280x800 -i :0.0 -f null -qscale 2
>> -threads 1 -b 20000k -vcodec mpeg1video -an out.avi
> (-b makes no sense with -qscale)
> That is great.
>
> If you provide us with output / results (or say if the problem still exists with
> this command line), somebody may be able to help you.
>
The mailing list appears to have rejected my attachment (output video). Is there any video codec which's lighter
than mpeg1? Also I recompiled ffmpeg, and this time I got 18 - 19 FPS
using mpeg1. But still x264 remains one of the fastest (targa is also fast).