ARRI Mitte Selects Mistika For Cathedrals Of Culture

Online Editor Christian Tröger, working at Berlin's ARRI Mitte, has selected Mistika's toolsets to post produce Cathedrals of Culture. Neue Road Movies, owned by Oscar award-winning director Wim Wenders, produced the film, which portrays various buildings around the world.

The film was directed by acclaimed directors bringing their own unique style. Wim Wenders covers the Berlin Philharmonic building; Robert Redford's film shows off the Salk Institute at La Jolla in California; Michael Glawogger depicts the National Library in Russia's St. Petersburg; Michael Madsen features the Halden Prison in Norway; Margreth Olin sheds light on the Oslo Opera House and Karim Ainouz focuses on the Centre Pompidou in Paris.
Neue Road Movies selected ARRI Mitte's team to conduct the visual post work. The complete finishing process, including conform, Stereo 3D alignment, as well as most of the VFX shots, was achieved by Christian Tröger using SGO's Mistika post production system based at ARRI Mitte.
In Cathedrals of Culture, most of the offline editing occurred on location where the buildings were filmed, or where the director resided. A variety of cameras and formats were used ranging from the ARRI Alexa, Cannon RAW 5k timelapse, RED 3, 4, and 5K, right through to archival and still shots.
Christian Tröger said: "Mistika was again used as the main tool for most of the work but also used as a hub and collector for all other processes. The Mistika timeline was simply created based on an EDL and a reference, with some episodes only modestly tweaked after editing, while other timelines requiring up to 20 stereo layers to organise the different sources, and also to visually vary and blend them to create interesting pictures.
"We decided to complete this project in a 2.5K workspace, but always directly from the camera footage, which meant that all of the array of resolutions were brought down on-the-fly to a specific 1:1.85 ratio which would fit exactly into the final 2K DCP at a later stage. From this unity resolution, we continued to add the stereoscopic treatment that the film required, including re-framing, compositing, stabilisation and so forth.
"When working directly from the native camera files like this, it is still necessary to have robust real-time playback in order not to disrupt the creative flow. Our Mistika runs on the latest HPZ820 with a Nvidia Quadro K6000 GPU, and this provided direct real-time playback in many areas.
"Where this was impossible, for short sections, I used Mistika's 'look ahead' cache, which pre-processes non real-time elements further along the timeline 'on-the-fly'. By the time the play head reaches these elements, they are cached and therefore play in real-time. For longer playback needs, I background-rendered several parts as a 2.5K pixel-native proxy for each eye."
Christian continued: "A 2.5k stereo as a proxy sounds crazy, but the machines are ready to give - so we should take it, as they can handle it! I made extensive use of Mistika's built-in batch render manager, so that I could split system performance by processing multiple files in the background while still carrying on with creative work. I also used the batch manager to give Mistika a task-list to complete while I slept!
"For the real output, Mistika generated a 16bit DPX file sequence, which is the format we use as standard for exchange within ARRI Mitte, as we believe that our interchange format must be of the highest possible quality."
ARRI Mitte's workflow solution allows DOP and stereographer to work in-house at the same time on the images, but on different systems. Every evening Mistika would output the daily work as stereoscopic 16bit DPX in 2K, which automatically replaced the source pool to feed the grading session.
Every morning began with a screening session with all collected work visible in the theatre. These morning sessions Christian describes as the most important times throughout the six episodes: - DOP, directors, stereographer, producer and artist - assembled to spend a concentrated hour together, to define a to do list for that day regarding the overall post production timing.
"In my opinion, a stereoscopic project needs more options for collaborative working than 2D projects for example, because the contribution of each department, including editing and colour grading, influences the perceived depth of the images."

www.sgo.es/mistika

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