3 ms·MPEG-4 Systems is not offered any more (since it's effectively dead).by kierank 16y agoMPEG-4 Systems is not offered any more (since it's effectively dead).vetinari 16y ago"Systems" is mp4 container. Did you mean MPEG-4 Part 2 (Advanced Simple Profile)?kierank 16y agoThe things which are patented generally apply to parts of the spec that have never been deployed.