I have a question about bitrate that I'd love some help with...
My source video is 1080p using a Canon 6D. In Premier Pro CS5 my project sequences are set to HDV 720p30, as I intend to export at 720p.
My export settings are:
NTST, 1280x720, 29.97fps, Progressive AAC 320kbps, 44.1 hKz, Stero
VBR, 2Pass, Target 6Mbps, Max 8 Mbps.
Square Pixels, Baseline Profile, Level 3.2
Everytime I render my movie, the resuting mp4 shows a bit rate of about 3200 kbps. Even if I select CBR / 6 Mbps I still get roughly 3000 kbps out.
Why so low? Wouldn't you expect something between the Target and the Max bitrate? My "movie" content is a video of someone drawing a picture, so a lot of frames are blank white-paper until the drawing progresses - so I guess there is a lot of potential for compression, but still seems really low.
Should I be using 1080 for my sequences and exporting at 720 instead? The source files at 1080p are showing a bitrate of approximatley 31,470 kbps.
Thanks for any pointers!
Cheers,
-Brett