> A multipass H264 encode can be made for HD at about 8Mbps. > > However no broadcast content is encoded prior to > transmission. It is > all encoded in realtime so you need a real-time single-pass > encoder. > You can't even pre-predict bitrate requirements due to the > inclusion of live footage.
I was under the assumption that things like films and anything that wasn't live would have been pre-encoded before being broadcast to get the best quality out of it. Also, yep you're right, 8MB/s isn't enough. Looked into it and I thought if 4MB/s was ok for 1080p movie then would 8MB/s would be fine for a 1080i/720p real time broadcast... But I was wrong. Sky uses something like 15MB/s for football matches and I've noticed that it does not look that impressive at all (well they look good but still have picture problems here and there). -C. - Sent via the backstage.bbc.co.uk discussion group. To unsubscribe, please visit http://backstage.bbc.co.uk/archives/2005/01/mailing_list.html. Unofficial list archive: http://www.mail-archive.com/[email protected]/
