[Ffmpeg-devel] noise in wav converted from mp2

[Måns Rullgård]

Alex <alex.ctn at gmail.com> writes:

> I have a raw mp2 file whose sample rate is 44100hz, with bitrate
> 128kb/s. It's okay to be played by RealPlayer or iTune. My following
> code snippet converts it to wav file.  It works, but there is also
> some noise. Could you tell me what's wrong?
>
> Thanks.
>
> ------------------------------------------
> av_register_all();
>
> codec = avcodec_find_decoder(CODEC_ID_MP2);
> c = avcodec_alloc_context();
> avcodec_open(c, codec);
>
> ReSampleContext * rsc = audio_resample_init(1, 1, 8000, 44100);

If you resample to 8kHz, noise is to be expected.

-- 
M?ns Rullg?rd
mru at inprovide.com