![]() ![]() However, this benefit comes at the expense of more storage space and bandwidth consumed while playing back these large files. Reading back an uncompressed DPX image sequence puts less load on the workstation because the machine does not have to expend CPU cycles decompressing the video frames. Some common image sequence formats are DPX and OpenEXR (EXR). Image sequences store each frame of video in a discrete file. mov file could contain video that is encoded with ProRes, H.264, or some other codec. The file format is referred to as a “container” because the file extension does not define which codec the video (and audio) stored within uses. Video files can contain multiple tracks of audio along with video and are stored in a “container” format such as. Technical and artistic requirements drive choice of codec, compression, and file type. PIZ compression is a lossless codec used with EXR image sequences, as described below. Examples of codecs are H.264 (a common consumer delivery codec), ProRes (Apple’s codec designed for video editing), and Sony XAVC (used by some Sony cameras to capture video). Video codecs can either be lossy (where some of the image data is discarded), or lossless (where no data is lost). Video is compressed to save space or bandwidth and then decompressed while being read. This compression is referred to as the video codec (compressor/decompressor). ![]() Video files and image sequences can be compressed or uncompressed. Professional content creation workflows deal with both video files and image sequences. ![]()
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