Converting HDCAMSR to DCP
Posted 20 April 2012 - 03:51 PM
Posted 22 April 2012 - 02:27 AM
1. Ingest the HDCAM-SR as an uncompressed Quicktime (probably a Blackmagic 4:4:4 codec, in our case).
2. Scale the image to meet the DCP 2K standard (for 1.85:1, it's 1998×1080, for 2.39:1, it's 2048×858). To be clear, the image fills the entire frame, there is no letterboxing or pillarboxing.
3. Export as a TIF sequence.
4. We use OpenDCP, which semi-automatically takes the TIF sequence and converts it to a JPEG2000 sequence in XYZ color, and then wraps it up in an MXF wrapper for delivery.
Posted 23 April 2012 - 10:18 AM
Posted 23 April 2012 - 11:16 AM
If you really wanted to fine-tune the scaling algorithm, then something like B-spline is going to technically look better than Bicubic. However, it complicates the workflow. The four step workflow I mentioned before could probably be covered in 4 hours for a 2 hour tape, using just FCP or Premiere and a DCP application. Adding a B-spline step could more than double that time, as it would add a completely new, time consuming process in a different application (we would probably use Nuke or a Photoshop action).