Summary of General Video Streaming Issues

[mmattel]

This is a brief summary of issues found related to streaming videos which can be streamed to a HTML5 browser with files_mediaplayer 1.0.4

Referenced issues:
#363
#357

File used: a web-optimized streamable mp4 video file with 2GB
File is on NFS = easy to monitor activity
Tests made via vpn from client to server to simulate a down sized connection (15mbit)
Start ... starting video
Stop ... stopping video
Back ... returning the to parent page
New Location ... setting the current play timeer to a loaction ahaed

• Opera/Chrome (W10x64Pro)
  Start: the file starts playing after 10s, the server downloads with 20MB/s from storage
  Stop/Back: download continues on the server, ownCloud becomes unresponsive, restart of php-fpm necessary to stop the download
  New Location: Starts the video from beginning

• Safari on iPad (IOS14.4) (not the App!)
  Start: Streaming does not start. It seems downloading the file instead, the server downloads with 20MB/s from storage.
  Stop: Stop button not clickable/responsive.
  Back: No idea if it is still is in a "download" mode or not, but the server loads the file from storage with 20MB/s. Restart of php-fpm necessary to stop the server downloading from storage
  New Location: test not possible because it tries downloading the complete file

Double-Check-Test (also see: #363 (comment))
Setup

• Created a testpage to be accessed by the browser to see if streaming an optimized mp4 file is possible
  (see: https://github.com/lcherone/Simple_Video_Stream/tree/master/Simple_Video_Stream)
• Added the same optimized video as used above to the "videos" folder
• Created a location in nginx so the page gets recognized
• Started browsing/streaming/moving the timer with immediate response with Opera/Chrome/Safari (on iPad)
• Low and intermediate data transmission on client, server and storage
• Data transmission immediately stops on all sides when the video is paused or stopped.

Result
It streams as expected ✔️
Monitoring the up/download figures both on client, server and storage clearly identifies streaming

Conclusio
The issue is definitively in ownCloud and/or the files_mediaviewer app.

@micbar @michaelstingl