Time reversal (film technology)

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The film camera is a "time machine". It allows not only the freezing of the present as well as the apparent acceleration ( time lapse ) and deceleration ( time stretcher / slow motion ) of time, but also its reversal by the fact that the film material is transported through the camera housing against the normal direction. This material is then played back correctly when played. This creates the time reversal. Particularly impressive effects can be used in conjunction with other film tricks, such as B. the multiple exposure / split screen technique result.

However, this technology is only available to film amateurs with certain cameras. For technical reasons, reverse filming is not possible at all with Super8 cassettes.

In the professional field, time reversal is mostly caused by copying.

"Backward recording" is not possible in video technology, since video cameras can only record in normal direction. Here, this effect can only be achieved after the recording, e.g. B. by dubbing or using editing software on the computer.