1080/30p in a 1080/60i project
by Richard Burman
on
Jul 9, 2008 at 4:08:29 pm
Hello,
I am shooting some speculative footage in 30p for a possible documentary. The deliverables should be 1080/60i. I have chosen to shoot 30p thinking that it would edit well in a 1080/60i project. I have ran into two problems. The MC 2.8.3 software is giving me warnings that mixing progressive and interlace can cause problems. And because I was advised to transcode to DNxHD145 (since the footage comes from a EX1 camera) the progressive footage blows up to presumably twice the size effectively cropping out most of the picture. Transcoding 30p to uncompressed is fine but that generates large files. Transcoding 60i footage to DNxHD145 also works fine.
I want to shoot progressive. Shooting 24p pesents another set of problems although it is preferred because it is close to PAL.
Re: 1080/30p in a 1080/60i project by David Wolf on Aug 16, 2008 at 4:59:29 pm
Richard. The 3.0 version of Media Composer will let you play Progressive and Interlaced clips on the same timeline if they are the same frame rate. 3.0 Also supports 35 Mbits XDCAM HD EX. Version 2.8 only supported 25 Mbits thin raster 1440x 1080. You can edit native in the XDCAM EX 35 or 25 Mbits format in 3.0, but will need to render your effects in an Avid format. Also, when it is time to output to tape you will need transcode to an Avid resolution.
Are you using the Sony EX1? Is 1080 30P an option or are you doing 24P with a 3:2 pulldown?
Re: 1080/30p in a 1080/60i project by Richard Burman on Aug 16, 2008 at 5:39:33 pm
David, thank you for your response. Most of my concerns have since been solved with MC3.0. I can now transcode XDCAM HD footage shot 30p to DNxHD145 with out the blow up that was happening in 2.8.3.
I would like to work in a 1080/60i project since it is the deliverable for broadcastors, good for most SD material, and good for 1080/30p as well. I haven't yet tested if 720/60p (for action shooting)or 720/30p (for the 60fps slow-motion effect) are accepted in this project format.
A more pressing EX/AVID problem has come up since concerning workfow and a possible software bug with CB2.0 or MC3.0. If you are curious, here is the post:
