How To Shoot Streaming Videos For The Web?
Streamed video is heavily compressed. The tricks of the compression are what determine what style of shooting streams well and what doesn't stream well.
One type of video compression separates the changing from the static parts of the frames in a particular clip of video. Then it recycles all the parts of the clip that are not sometimes moving, and encodes the moving parts of the images.
When the compressed video is transmitted, parts of the information get lost in the Internet traffic, but the decompression software compensates for this by using its best guess as to where things should be in the frame.
The official term for compression of this sort is Lossy Video Compression.
Lossy compression is needed, because the amount of information that digital video requires is far greater than the amount of information the Internet can transfer to an individual computer over a standard phone line, at least till today.
We measure the amount of information transferred in bits per second, and we call this bandwidth. Bandwidth is important because most connections to the Internet do not have enough bandwidth to send video without compression. For example, uncompressed video digitized to half the frames per second and lines per inch of television would require the bandwidth of around 8mbps.
Because the bandwidth is limited and the compression is lossy, video streaming will be choppy and unclear if there is too much movement. There are, however, some tricks to shooting video to be streamed.
It might seem that the tricks you need to use for video streaming limit the creativity of the videographer.
But this is far from truth. A true mark of creativity is being able to make a compelling video within the framework and limitations of the bandwidth and compression.
These are temporary limitations anyway. Only the pioneers of video streaming will have to contend with them. When more Internet bandwidth is available, you will be able to shoot video in any style you wish, and still have it look smooth and not be jumpy.
Until that point, you have to work within the framework of what video the software can compress, and what video it can't compress.
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