If you have a green screen when watching records of Synology Surveillance Station on your mobile phone, or tablet, and are using H.264 compression, then simply disable the “H.264 hardware decoding”.
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Do you see something like this on your mobile ?
Open the “DS Cam” App, click on the “three horizontal lines” top-left icon, and then on the gear icon:
There, disable the “Hardware decoding”:
Now, the image should be fine:
Et voilà.
