DNxHD 1920x1080p/29.97 45M

From Avid's DNxHD.pdf: "Avid DNxHD encoding is specifically designed for nonlinear editing and complex multi-generation compositing common in today’s collaborative production and broadcast news environments."

"Avid DNxHD 45: High-quality offline editing of HD progressive sources only. Designed for projects using an offline/online workflow due to large quantities of source media and/or needing more real-time preview streams for craft editorial or multicamera editing."

Project format: 1080p/29.97
Resolution: Avid DNxHD 45
Frame size: 1920 x 1080
Color space: YUV 4:2:2
Bit depth: 8 bits
Frame rate: 29.97
Scan type: Progressive
Mbps: 45
Min/GB: 3.18

Codec: PCM 16le
Audio rate: 48 KHz
Audio channels: 2

Tested with:
kdenlive 0.9.2
MLT 0.8.6
openSUSE 12.1 x86_64