[Libav-user] Problem with compressing AAC files with sampling rate 16000
klaussfreire at gmail.com
Thu Sep 18 15:41:08 CEST 2014
On Thu, Sep 18, 2014 at 9:43 AM, adev dev <androiddevmar11 at gmail.com> wrote:
> I am compressing movies from bitmaps and AAC files. Normally AAC files are
> recorded with following params: bit rate: 192000, sampling rate 44100. These
> audio params are set in output context (AVFormatContext) in compression. In
> happy day scenario it is working correctly. Movie and sound are correct.
> The problem occures if sound params are "strange". From time to time I have
> AAC files recorded with params: bitrate 96000, sampling rate 16000. In this
> case sound is very fast and ends before end of movie. If I set these params
> (96000, 16000) in output context there is no sound in the movie at all.
> Created movie file has audio stream with bitrate about 500 b/s what is
> really strange.
> What else has to be set in FFMPEG to correctly compress AAC files with bit
> rate 96000 and sampling rate 16000?
> I am using FFMPEG 2.1 and native AAC encoder.
If you can build from source, try head after applying the patch in
It fixes some issues with some sampling rates, although your issue
doesn't sound familiar to me, it's worth a try.
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