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Videos

PhotoPrism may use ffmpeg to transcode common video formats to MPEG-4 AVC. This container / codec combination doesn't require transcoding as it can be played natively by most modern browsers, see https://caniuse.com/mpeg4.

For a list of codecs ffmpeg supports, run this command in a terminal:

ffmpeg -decoders

Note that Firefox may only play the corresponding AAC audio codec if the operating system supports it, see https://caniuse.com/aac.

All other browsers shouldn't have any issues.

Info

While the QuickTime .mov container format served as the basis for MPEG-4, there are differences and the two are not quite interchangeable. They still play in most browsers and won't be transcoded automatically for this reason.

Containers

Codecs