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nextcloud / ios

📱 Nextcloud iOS App
https://itunes.apple.com/us/app/nextcloud/id1125420102
GNU General Public License v3.0
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Slo-Mo videos auto uploads as normal videos #575

Open callebridholm opened 6 years ago

callebridholm commented 6 years ago

When I film slow motion movies at my iPhone and then the Nextcloud app auto upload them the movie and I try to play it at my Windows laptop it is a regular movie without any slow motion. Is this a normal behavior or is the Nextcloud app doing something wrong?

iOS version: 11.3

App version: 2.20.8.00003

Server configuration

Operating system: Debian 9.4

Web server: Apache 2.4.25

Database:MariaDB 15.1

PHP version: PHP 7.0.27-0+deb9u1

Nextcloud version:13.0.2

marinofaggiana commented 6 years ago

Hi @spridarn thanks for you report. When I have a bit of time make a test

hholtmann commented 5 years ago

1) SlowMo Videos are normal videos files recorded with 120fps or 240fps. Nextcloud transfers the originally video file. If you watch these videos on iOS (e.g. in the Photos App) a "suggested part" of the video is played down at low speed, which gives you the Slo-Motion effect. This also works on QuickTime-Player in macOS. However, if you use a non Apple video player (e.g. on Windows) it will play back as a normal 120fps/240fps video unless you slow down certain parts in a video editor (Premiere etc). Please see also Apple's technical notes for Slo-Mo files: https://support.apple.com/en-us/HT204064 So technically NextCloud is doing the correct thing here:

2) When you send a SloMo-Video e.g. by the iOS Mail App it gets reencoded into a 30fps video with the Slo-Mo part being applied. So it will playback "correctly" on any platform, but it's not the original file anymore and the Slo-Mo part can be changed.