Hwaccel=auto errors on docker

@mrm I know you’re rolling back the hwaccel default on beta.10, so this is just FYI, this is a not just a MacOS problem - I am seeing errors on docker on unraid.

{"ts":1624666281270,"l":"warn","ctx":"ChildProcess","msg":"stdoutResult(): stderr(data)","meta":{"cmd":"ffmpeg","args":["-loglevel","error","-hwaccel","auto","-i","/ps/library/2021/2021-03-28/13215919_10209232688202080_1175593472_n_10209232650121128.mp4","-ss","1.5","-vframes","1","-f","singlejpeg","-y","/ps/cache/imgcache/bj/sg/d2901wb02gyh1xjykvyf/.frame.jpg"],"opts":{"timeout":60000},"error":"Device creation failed: -542398533.\n[AVHWDeviceContext @ 0x149a148ebb00] Cannot open the X11 display .\nDevice creation failed: -1313558101.\n"}}

`

Thanks for the report! You can set ffmpegHwaccel=false to disable until beta.10.

Already done. It seems that may have unstuck the sync, or it could be a coincidence