Yeah, as far as I know, DNxHD requires very specific resolution/bitrate combinations. Here’s a table of them that I found on the interwebs (itbroadcastanddigitalcinema. … howto.html)
Project Format Resolution Frame Size Bits FPS <bitrate>
1080i / 59.94 DNxHD 220 1920 x 1080 8 29.97 220Mb
1080i / 59.94 DNxHD 145 1920 x 1080 8 29.97 145Mb
1080i / 50 DNxHD 185 1920 x 1080 8 25 185Mb
1080i / 50 DNxHD 120 1920 x 1080 8 25 120Mb
1080p / 25 DNxHD 185 1920 x 1080 8 25 185Mb
1080p / 25 DNxHD 120 1920 x 1080 8 25 120Mb
1080p / 25 DNxHD 36 1920 x 1080 8 25 36Mb
1080p / 24 DNxHD 175 1920 x 1080 8 24 175Mb
1080p / 24 DNxHD 115 1920 x 1080 8 24 115Mb
1080p / 24 DNxHD 36 1920 x 1080 8 24 36Mb
1080p / 23.976 DNxHD 175 1920 x 1080 8 23.976 175Mb
1080p / 23.976 DNxHD 115 1920 x 1080 8 23.976 115Mb
1080p / 23.976 DNxHD 36 1920 x 1080 8 23.976 36Mb
1080p / 29.7 DNxHD 45 1920 x 1080 8 29.97 45Mb
720p / 59.94 DNxHD 220 1280 x 720 8 59.94 220Mb
720p / 59.94 DNxHD 145 1280 x 720 8 59.94 145Mb
720p / 50 DNxHD 175 1280 x 720 8 50 175Mb
720p / 50 DNxHD 115 1280 x 720 8 50 115Mb
720p / 23.976 DNxHD 90 1280 x 720 8 23.976 90Mb
720p / 23.976 DNxHD 60 1280 x 720 8 23.976 60Mb
Keep in mind that the bitrates listed here are in Mb/s (=1,000 kb/s), so you’ll have to multiply these values by 1,000 when passing them to Draft.
Hope this helps,
- Jon