Juan Carlos Elias, produces, directs, films and commercials that Katarsis ends Films continually created. He founded the company as soon as he finished his film studies.
Blackmagic Design
Katarsis Films is a small company but its projects are all great. An independent production company based in Mexico City which was responsible for the production of a national commercial for Feria Chapultepec Magico. Until recently, the Mountain Infinitum beat the record as the first roller coaster in the world to carry its passengers through three turns completely vertical loop. Today the Fair celebrates its anniversary 50 offering visitors unlimited fun will never forget.
Katarsis had only three days to complete the project, and one day to capture the extreme thrill of a free fall of 50 meters. This challenge is made even greater because of the cloudy sky that accompanied Juan Carlos Elias, founder of the company, and his team during the eight hours of filming.
"It was a day of crisis," says Juan Carlos. "We needed three or four cameras simultaneously recording everything." Katarsis plan for a shoot with multiple cameras Blackmagic Cinema Camera included and Pocket Camera Pocket Cinema Camera to capture all the necessary material.
The thrill of vertigo
When shopping for Fair observed, it is hard to avoid the feeling of butterflies in the stomach, seeing park visitors falling from extreme heights and shake back and forth in attractions like the Crazy Mouse. To reflect the amount of excitement, a group of young actors received the mission to enjoy the many attractions of the fair. But while the boys shouted for joy, Juan Carlos and his team faced one challenge after another.
Due to the impossibility of film inside the structures, they used the helicopter -a Octocopter eight propellants cameras- and Dactylcam, similar to a motorized dolly traveling for airborne cable. This high-tech equipment allowed Katarsis record materials from almost all angles and all distances.
"We were 200 meters from the car and camera Pocket Cinema in particular was pretty fast and moved quickly because it is very light. With the Octocopter, we could get material from the guys in the cars over long distances, but the helicopter you can only fly five minutes when carrying larger. cameras with the camera Pocket Cinema, you can fly more than seven minutes due to their weight. These two extra minutes are crucial when you have such limited time to shoot time. in addition, the camera records in RAW format, which also saves time in post-production. "
The passenger Dactylcam led to the Pocket Cinema Camera, aligning it with the roller coaster rails to capture the dynamism of high speed cars hurtling towards earth. "The wide dynamic range of the camera was very important for us, since we could acquire more detail in the material and convert cloudy weather on a sunny day," said Juan Carlos.

It is not possible to return
After finishing the filming of a single day - unique opportunity to obtain the required material - Katarsis had only three days to turn it into a commercial ready to air on national television. Working from a variety of formats, including RAW, DMX and MP4, Juan Carlos and his companions had to bring the magic of transforming the material of a cloudy day in an attractive, coherent and sunny business.
"We had to do it all in post-production. The material in each chamber was different. It was very complicated, as on a cloudy day the light changes a lot, sometimes gray, others darker. "
Despite the challenges of filming during a cloudy day, Juan Carlos knew that one of the advantages of using the Blackmagic Pocket Cinema and Cinema cameras would be easy to manipulate cloudy sky for a perfect day at the fair.
"Since the Blackmagic cameras record in RAW, if you do not get an ideal picture, you can improve it later. And this extends the space for creativity. So ultimately, helped me a lot during post-production know he could graduate the material of the Blackmagic cameras to get a look the same in all images. "
Juan Carlos, this type of color correction could only be achieved with the help of DaVinci Resolve. He explains that "first, got the material from all cameras to DaVinci Resolve. Then we export to ProRes HQ Apple format for editing. Once finished cutting, send a copy to the study of sound and exported as XML from Final Cut. Finally re-import the material directly from the camera to the timeline of DaVinci Resolve for color grading with higher quality material and not lose any information. enough We like the ease of DaVinci to handle all formats in which we shot. "
He added that the main goal for color correction was to create a uniform look, so that the differences between the chambers are not noticed. Similarly, it was necessary that saw the cloudy day sunny. It could change the color of the sky you just add a little blue to the whiteness of the clouds, a bit of saturation and contrast using the color selection tool to change the color of the sky from gray to blue. The end result looks like a perfect summer day.
A sigh of relief
The four rushing days for the project found them a toboggan ride compared to normal production. Despite the ups and downs, everything went well, and for that Friday trading were already in the air on national channels 2, 4 and 5 plus another four or five pay channels. "We are happy. When we saw the material then finished the post-production process was a fantastic moment, "concluded Juan Carlos.
Richard St.
Author: Richard St.
Journalist from the University of Antioquia (2010), with experience in technology and economics. Editor of the magazines TVyVideo + Radio and AVI Latin America. Academic Coordinator of TecnoTelevisión & Radio.



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