[FFmpeg-user] Generating bloated videos

Bouke / Videotoolshed bouke at videotoolshed.com
Sun Jun 4 14:34:01 EEST 2023

> On 4 Jun 2023, at 13:15, Reindl Harald <h.reindl at thelounge.net> wrote:
> Am 04.06.23 um 12:44 schrieb Cecil Westerhof via ffmpeg-user:
>> Bouke / Videotoolshed <bouke at videotoolshed.com> writes:t I’ve never seen in myself.
>>> Brings me to the low quality, note that noise is very hard to compress.
>> That can be true, but still the behaviour is strange. Veryfast giving
>> more compression as slower and every compression giving more data as
>> the original.
> common sense
> "veryfast" don't optimize quality which in doubt increase size

You missed the point. Cecil is seeing SMALLER files with ‘veryfast'
> that compressing uncompressable stuff increase size is pretty normal - try to compress a xz-archive with zip....

What I think is that the sources have a lof of (compression) noise, and that ‘slower’ is trying to retain as much detailled noise as possible.
(But that’s a guess.)


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