Knowledge Base/General Information/FAQ

How big are CineForm files?

Jake Segraves
posted this on April 02, 2011 03:18 PM

 

CineForm Intermediate files are encoded using a variable bitrate algorithm, so file sizes vary based on scene complexity, image resolution, frame rate, and chosen compression quality. But the following ranges apply reasonably well:
HDV: For 1440 x 1080 60i HDV material, you can expect a range of arount 10 - 14 MBytes/sec, or around 40GB/hour. In comparison, 1280 x 720 24p material will be about half that size. These files are larger than are generated by in-camera MPEG or AVCHD codecs to enable more "headroom" for manipulating the files in post, offering significantly improved visual fidelity within multi-generation workflows.
HD: 1920 x 1080 10-bit 24p streams usually range from about 15MB/sec to 20MB/sec, or about 60GB/hour.
2K: 2K file sizes are comparably larger than HD files because of increased spatial resolution. Also, if your 2K files originated as film scans they will have a lot of grain in them. It is for this reason CineForm created our two """"Filmscan"""" modes - to preserve the grain structure from film scan sources. 2K file sizes range typically from about 20MB up to 30MB/sec. We’ve seen complex material such as from the StEM (Standardized Evaluation Material) range upwards to 50MB/sec.
CineForm 444: CineForm 444 files are about twice the size (at a given spatial resolution) compared to the equivalent YUV 4:2:2 files at the same spatial resolution. So 1920x 1080 CineForm 444 files will be about 40 MB/sec.
4K 444: Generally in the range of 60MB/sec (200 GB/hr) up to 90 MB/sec (300 GB/hr).
CineForm RAW: 2K CineForm RAW is generally in the range of 15 MB/sec. 4K CineForm RAW is generally in the range of 30MB/sec to 50 MB/sec).

CineForm Intermediate files are encoded using a variable bitrate algorithm, so file sizes vary based on scene complexity, image resolution, frame rate, and chosen compression quality. For the most part, the following ranges apply reasonably well:

HDV: For 1440 x 1080 60i HDV material, you can expect a range of arount 10 - 14 MBytes/sec, or around 40GB/hour. In comparison, 1280 x 720 24p material will be about half that size. These files are larger than are generated by in-camera MPEG or AVCHD codecs to enable more "headroom" for manipulating the files in post, offering significantly improved visual fidelity within multi-generation workflows.

HD: 1920 x 1080 10-bit 24p streams usually range from about 15MB/sec to 20MB/sec, or about 60GB/hour.

2K: 2K file sizes are comparably larger than HD files because of increased spatial resolution. Also, if your 2K files originated as film scans they will have a lot of grain in them. It is for this reason CineForm created our two """"Filmscan"""" modes - to preserve the grain structure from film scan sources. 2K file sizes range typically from about 20MB up to 30MB/sec. We’ve seen complex material such as from the StEM (Standardized Evaluation Material) range upwards to 50MB/sec.

CineForm 444: CineForm 444 files are about twice the size (at a given spatial resolution) compared to the equivalent YUV 4:2:2 files at the same spatial resolution. So 1920x 1080 CineForm 444 files will be about 40 MB/sec.4K 444: Generally in the range of 60MB/sec (200 GB/hr) up to 90 MB/sec (300 GB/hr).

CineForm RAW: 2K CineForm RAW is generally in the range of 15 MB/sec. 4K CineForm RAW is generally in the range of 30MB/sec to 50 MB/sec).