The technical side of editing quiz

What do the numbers 16:9 refer to?

The numbers 16:9 refer to the HDTV wide screen TV or the aspect ratios, the size of the viewing screen.

What is the frame size of a 1080p video file?

The frame size of a 1080p video file is 1920x1080, the Blu-ray standard; which most camcorders shoot at.

If you have a video file which is 720:50p what is the frame rate and what does p stand for?

The frame rate of 720:50p would be 50, which is how many frames there are per second; the higher this number the clearer the fast movement will be and it is also better if you wish to shoot in slow motion. ‘P’ stands for Progressive scan, which shows every frame one after the other.

What is the difference between p and I (e.g., 1080p)?

The difference between P and I is that Progressive scan shows frames one after the other whereas Interlaced scan shows half the frame at any moment: then interlaces the half frames together so we see the unified movement. Progressive scan is preferred however it produces files that are larger.

What frame rate is real film shot at?

Real film is shot at 24fps; some cameras offer the chance to shoot at this frame rate: although the higher will give you smoother and more effective action. In the Us the NTSC system is 29.97fps and in the UK the PAL system is 25pfs, they both use different frame rates.

What might be the advantage of shooting at a higher frame rate?

The advantage of shooting at a higher frame rate would be that the rate would give you smoother action and the better the video would be at showing fast movement or slow motion.

What defines a lossy file?

Lossy files are highly compressed files, unlike the lossless files which are less compressed. They sacrifice some detail and professional setups use lossless or uncompressed file types but the file sizes can be huge.

Name three file types commonly used in video editing.

AVCHD: a highly compressed, domestic camcorder files type that often has the suffix . mts.

MOV: also compressed, it is a video file type associated with Apple QuickTime and had the suffix .mov.

FLV and F4V: Both flash video files, flash a technology used on the web. These are both lossy, compressed files.

What is the different between a video file type and a codec?

The difference between a video file type and a codec is how the video and audio is compressed to fit inside; then decompressed to read it again, it actually means coding/decoding; whereas, video file type is the container.

What is bitrate?

Bitrate is the rate at which a file processes information, the higher the bitrate the more effective and powerful the computer you would need.