Ok, encoded a PJPEG at 320 x 240 at 75% quality….44k stereo audio at 15fps. the 30 second clip was about 20 megs. I opened that in QT Pro and exported to H264 at the same size at 10fps with the quality slider between low and medium…I did ALaw 2:1 audio at 32K best Mono. Clip looked very good and the 30 seconds came in at 1.8 megs. Perfectly acceptable for client viewing.
So, any realtime encoding takes a serious quality hit, probably because encoders work best when they can analyze the clip first, then encode….encoding on the fly it can’t do that.
again, if I were Apple, I would take some of the machine control functions of FCP and combine it with a multipass realtime encoder.
But when I think of it, most of the time we are encoding right off the timeline, not from tape based sources. Not always, but most of the time.
So encoding realtime works, b ut not very well, for now, and it is always best to have a clip.
However, on the PC I have gotten excellent results with Windows Media Encoder when digitizing right off tape sources…it can control a DV device and can even to multi pass by caching to the hard drive on the first pass, then encoding from that clip on the second pass….kind of best of both worlds, but it’s not real intuitive to set up.
I might load Win XP on my Macbook and load Windows media encoder and give it a go.
Rich Rubasch
Tilt Media