Thank you I will try this.
However I have Putty for other things but didn’t know you can use it for syno. Do I need to install something on my syno to have it work with SSH? Or do I need something else in order to send that command
I tried this and it doesn’t do the trick for me. What did was making af new encode of the source file and tell handbrake to overwrite the one that caused problems. The “new” ones play flawlessly although they have the same audio and video settings as the old ones which previously worked…