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.
IIRC, presets are machine dependent, or at least they are optimized for the hardware. So if you have a weak machine, veryfast will use even worse encoding because you’re simply saying “I just want it done fast”, while on a more robust machine it may take more liberties. To match it completely I think you need to disregard the presets and set everything yourself, like CRF and everything.
Is there a way to disable the preset completely? There’s no “none” option, just “speed, balanced, and quality”, but I set everything else up manually.
Sorry I usually work directly with ffmpeg and that’s how I had the hunch, those presets are h264 presets that go in. But does it matter, you said you were only curious, I think that’s why, so now you know