[x264-devel] question regading encoded keyframe size at 720p

[Henrik Gramner]

On Wed, Oct 14, 2015 at 10:27 PM, Carl Petersen <cpetersen at broadsoft.com> wrote:
> It’s a video conferencing application and the resolution is 1280x720.
>
> We set CRF to 24 and aim for a bitrate of 1024 kbit/s.
>
> Ive noticed the keyframe sizes can be well over 100 kbytes or well over 100 rtp packets when packetized. We don’t do intra refresh at this point in time.
>
> Though when I compare this keyframe size  with other devices, the other devices appear to have a much smaller keyframe size at a similar bitrate.
>
> What do I need to consider if I wanted to reduce the keyframe size? Are the other devices just encoding at a lower quality? But then I see their bitrate is similar to mine so I must be missing a part of the bigger picture.
>
> Baseline profile.

Hi,

Are you using VBV?