[FFmpeg-user] Questions regarding hevc_videotoolbox encoding

[Carl Eugen Hoyos]

2018-09-27 0:08 GMT+02:00, Nomis101 🐝 <Nomis101 at web.de>:
> Am 26.09.18 um 21:27 schrieb Carl Eugen Hoyos:
>> This is not unexpected.
>>
>> Feel free to try even higher bit-rates or main10 profile.
>
> Yes, main10 gives little bit nicer results. It seems to me there is a
> bitrate limit. If I use 30000k for example (same as source) ffmpeg
> everages to 22000k.

I would expect that this depends on the input video.

> How to determine the optimal bitrate? Should it be
> the same as the source or lower than that, how much lower?

Only your needs determine it, if you only care about quality,
always set it to a very high value.

I don't know why there is no constant quantizer option...

Carl Eugen