[FFmpeg-devel] [PATCH 2/2] avcodec/hap: add "compressor" option to Hap encoder to disable secondary compression

Martin Vignali martin.vignali at gmail.com
Wed Nov 9 09:24:41 EET 2016

> >
> > Maybe can be useful, to have a log,
> > if chunk_count != 1 and compression is none, to show to the user, that
> the
> > chunk count option will be override by 1.
> >
> The existing info log in hap_init() will print eg "6 chunks requested but 1
> used." as is already done when the user's choice is overridden to divide
> frames evenly. Is that sufficient or do you think a reason should be
> displayed?

Yes you're right, the existing log, it's maybe enough.
Like suggested by Michael, if it's documented in the encoders.texi, it can
help user to know what settings have an impact on the result.

> Relative to this patch, with the none ( / snappy) parameter, libsnappy is
> > not require for the entire encoder now,
> > only when we set compression to snappy.
> > Maybe can be useful to have something like in the tiffenc.c, where Zlib,
> is
> > required for only deflate compression).
> >
> As Snappy is disabled by default, I think it would be a mistake to have the
> default configuration of ffmpeg encode Hap without Snappy. Skipping the
> Snappy compression stage is not generally desirable and it should not be
> the default behaviour.

Yes, maybe don't output by default hap without snappy,  it's the best



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