Previsualization and On Set Preview
Finally, visually complex productions can actually see the entire shot during production, instead of staring at a wall of green. When everyone sees the same image, decisions are rapid and stage operations efficient.Previzion provides the following on stage benefits:
- Know that you have the shot before you wrap.
- Make the movie once instead of three times, using Previzion’s clean data workflow to go from previsualization to production to post production.
- Remove surprises from the visual effects process.
- Tune on set lighting with the composited preview image, to avoid expensive re-lighting in post.
- Catch and diagnose keying problems easily, before paying for them in post.
- Catch set extension or character mismatch problems instantly.
- See the entire shot at once.
- Retain artistic control with DP and director.
Production and In Camera Compositing
Previzion’s real time VFX pipeline is enabling an entirely new world of high speed visual effects production: finished shots, instantly. For many productions, traditional post methods of keying, tracking, and compositing simply take too long and cost too much; Previzion enables high quality compositing, without the wait or the cost.
Previzion can provide productions the following benefits:
- Finish shots in real time — no post!
- Photorealistic background creation tools let you send a 2 person photo survey team to a location, instead of an entire crew.
- Integrate prerecorded video with stills seamlessly to make scenes come to life.
- Store your photorealistic sets . . on a thumb drive.
- Use the stages, cameras, lenses, and shooting style that you’re already used to.
Post Production
Previzion can enable radical speed increases in post production pipelines. With the combination of timecode matched tracking metadata and a timecode matched composited feed, editorial and VFX can both hit the ground running.
Benefits to post production include:
- Reduce or eliminate the need for post production tracking with timecode matched metadata.
- For shots with ground contact that require post tracking, real time data can be used as a seed to dramatically increase tracking speed by 5-10x.
- Keep track of where virtual objects were placed, on a shot by shot basis
- Editorial can start cutting immediately, with a timecode matched composite image
Customer Installations
Frequently Asked Questions
Creating Sync From HDSDI
This converter takes in a standard 4:2:2 HDSDI signal, and does a D-A conversion on it. It also passes the original HDSDI digital signal out untouched, and we then connect this output to the Previzion HDSDI video input. The D-A conversion results in a Y”CbCr analog HD video signal, along with a pure HD genlock output. This HD genlock is what we then route to the Airtrack genlock input, and it works pretty well.
This basically depends on there being a very short delay between the point where the camera triggers the sensor, and when the resulting frame comes out the camera”s HDSDI port. In practice, it actually works pretty well. If you really yanked the camera around, you might see a tiny temporal lag between the virtual background and live video, but in practice it almost never happens, and it makes connecting to an existing camera much, much easier. Some cameras, like the Arri D21, don”t have a genlock input, so this is the only way to sync to these cameras.
Some cameras that have a 2:3 pulldown in their output (The RED, the Varicam, etc.) require the use of an external genlock signal to syn
Previzion – Technical Specifications
Video Inputs
- 2x HDSDI (BNC) 4:2:2 live video feeds
- 8x MPEG2 (.mpg) Full HD video files
Video Outputs
- 1x HDSDI (BNC) 4:2:2 comp output
- 1x HDSDI (BNC) 4:2:2 (selectable comp or matte output)
Input/Output Frame Rates
- 23.98 PsF @ 1920×1080
- 25.00 PsF @ 1920×1080
- 29.97 PsF @ 1920×1080
- 59.94 i @ 1920×1080
- 23.98 PsF / 59.94 p @ 1280×720 (RED One)
- 23.98P @ 1920×1080 (RED Epic)
Screen Resolution
- 1900 by 1200 pixels - Previzion Portable
- 1600 by 1200 pixels - Previzion Studio
Network
- 10/100/1000 Gigabit Ethernet (RJ45)
Timecode
- LTC Timecode input via BNC
Genlock/Sync
- SMPTE Tri-level sync signal input via BNC
IO Ports
- 4x Serial Ports
- Zoom/Focus Controller Data
- Stereo Rig/Encoder Data
- Airtrack Data
- Intersense Data
- Additional 4x S
White Papers
- VFX By the Numbers: A Technical Introduction to Previzion