I'm hoping someone could shed some light as to what's going on here.

I was able to get Handbrake installed on my Synology DS920+ NAS with Intel Quick Sync support. Using the exact same settings that I do on my local installation of Handbrake, the file size and end results appear vastly different.

I've tested different video files, but also the exact same one.

For example:

• Original file H.264 1.3 GiB 18.1MBits/s bitrate
• Handbrake local H.265 459 MiB 6.42 Mbits/s bitrate
• Handbrake docker H.265 973 MiB 13.6 Mbits/s bitrate

My settings are:

• Video encoder: H.265 (Intel QSV)
• Framerate: Same as source
• Variable framerate
• Preset: Quality
• Constant Quality: ICQ 32
• Multi-pass encoding enabled.
• Profile: Auto
• Level: Auto
• Filters: off
• Dimensions: default (no resize, rescale, etc.)
• Audio: AAC (avcodec) (mono)
• Web optimized: Yes
• Align A/V start: Yes
• Passthrough Common Metadata: Yes

Is there an oversight that I'm missing that could explain this? I'd rather use the Docker version, since it doesn't tie up my main laptop.