DNxHD 1920x1080i/50 120M

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 120: For high-quality mastering when using 8-bit lower data rate sources such as HDCAM and DVCPRO. 120Mbps is the data rate for 1920 x 1080 25fps interlaced sources (50 fields). Progressive sources at 24fps will be 115Mbps and at 25fps will be 120Mbps."

Project format: 1080i/50
Resolution: Avid DNxHD 120
Frame size: 1920 x 1080
Color space: YUV 4:2:2
Bit depth: 8 bits
Frame rate: 25
Scan type: Interlaced
Mbps: 121
Min/GB: 1.181

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