[Libav-user] Fwd: fixed vs floating point mp3 encoder

Lina Sharifi sharifi91 at gmail.com
Mon Mar 13 19:58:54 EET 2017

Thanks, that was the answer that helped me. I have a S16 raw data, I am
able to successfully convert it to S32P or FLTP (by swr_convert) and feed
it to the mp3 encoder. Should I expect to have different audio quality
between float and int version? Is there any other differences between the
two implementations?

On Sat, Feb 4, 2017 at 2:38 PM, Carl Eugen Hoyos <ceffmpeg at gmail.com> wrote:

> 2017-02-04 17:58 GMT+01:00 Lina Sharifi <sharifi91 at gmail.com>:
> > I am using ffmpeg integrated with libmp3lame for encoding
> > (AV_CODEC_ID_MP3), Is there an option for to enable
> > fixed point (integer) encoder? Probably a codec flag?
> There is one encoder that takes different sample_fmts.
> You have to choose one when initializing the encoder,
> make sure that the encoder really accepts it and feed
> the correct data.
> (s16p, s32p and floatp are supported)
> Not necessarily related: We do not guarantee that future
> versions of FFmpeg take the same sample_fmts than
> current FFmpeg, they have changed in the past (without
> version bump)!
> (That's why your code has to check the fmt.)
> Carl Eugen
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