venc: tune MPEG-4 parameters
venc: tune MPEG-4 parameters

Modify the mpeg4 video encoder parameters to remove header extension
codes, resynchronization markers, and set I-frame interval to match one
I-frame per second.

Signed-off-by: Miguel Verdu <5ed475624dfa1b3d64c4858a22ad58e890c87601@nokia.com>
Signed-off-by: Felipe Contreras <de77a8b9cd239b204c19c52ed62e48ab47243362@nokia.com>

felipec/gst-dsp,felipec/gst-dsp,community-ssu/gst-dsp,community-ssu/gst-dsp,community-ssu/gst-dsp