[BUG] IOS app errors when trying to stream an mp4 video

[mmattel]

Steps to reproduce

1. Tap on a web-optimized mp4 video to play it.
2. The video itself is web obtimized, but the error also occurs when using the un-optimized version

Expected behavior

Video should start playing (streaming, not downloading)

Actual behavior

An error message appears:
Fehler, Vorgang gestoppt

Please also see issue on files_mediaviewer app as it contains additional tests that have been made which may be of interrest for this issue. owncloud/files_mediaviewer#369

Client

iOS version: 14.4

ownCloud app version: 11.4.5

Device model: iPhone and iPad

Server configuration

Web server: nginx

Database: mariadb

PHP version: 7.4

ownCloud version: 10.6 stable

Storage backend (external storage): local, SMB, GD

Logs

Web server error log

no data for that issue

ownCloud log (data/owncloud.log)

no data for that issue

@michaelstingl

[mmattel]

@mneuwert fyi

[michaelstingl]

My recommendation to standardise the test setup:

• Use big_buck_bunny_1080p_h264.mov or other files from https://download.blender.org/peach/bigbuckbunny_movies/
• Verify mediainfo shows IsStreamable: Yes
• Use Network Link Conditioner profiles to limit bandwidth

% mediainfo --fullscan big_buck_bunny_1080p_h264.mov | grep IsStreamable
IsStreamable                             : Yes

[mmattel]

1. .mov files cant be streamed in HTML5 enabled browsers (defacto all) as the format is not supported. In those browsers, it will always download first. You need to use a streamable .mp4 file.

2. after downloading the bunny file for two days (!) and sync it with my oC, the result trying to play the video in the IOS app stays the same Fehler, Vorgang gestoppt