[FFmpeg-user] motion detection

Henk D. Schoneveld belcampo at zonnet.nl
Sat Feb 1 10:47:26 CET 2014

On 31 Jan 2014, at 03:07, cizzy92 <christomullen at gmail.com> wrote:

> hi,
> i'm looking into motion detection in ffmpeg to see what effect it has on the
> compression of each frame in a video. my question is:
> is motion detection is enabled by default?, and if so, how to disable it.
> thanks in advance! 
AFAIK that’s how encoders like h264 work. What is the difference between current and former picture and store the difference and when playing back former plus difference equals new picture. If you want to see the difference in compression look at the size of an i-frame and a p or b-frame. The I-frame doesn’t depend on former frames the others do.
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