[Libav-user] Problem with compressing AAC files with sampling rate 16000

[adev dev]

I made mistake. FFMPEG2.4 + aac_quality_improvment.patch do not solve the
issue with sampling rate 16000. I will wait for patch update.

On 20 September 2014 15:10, adev dev <androiddevmar11 at gmail.com> wrote:

> I do not know why some warnings are treated as errors.  I added flag
> -disable-werror but still the same. I will wait for update of that patch.
> For now I managed to build FFMPEG2.4 + aac_quality_improvment.patch. At
> least that problem with pulsing noice is fixed by that patch. Thanks for
> help!
>
> On 20 September 2014 14:14, Claudio Freire <klaussfreire at gmail.com> wrote:
>
>> On Sat, Sep 20, 2014 at 6:33 AM, adev dev <androiddevmar11 at gmail.com>
>> wrote:
>> > This is information about the file which cannot be compressed:
>> >  Metadata:
>> >     major_brand     : isom
>> >     minor_version   : 0
>> >     compatible_brands: isom3gp4
>> >     creation_time   : 1948-08-31 11:42:22
>> >   Duration: 00:00:47.68, start: 0.000000, bitrate: 96 kb/s
>> >     Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 16000 Hz, mono,
>> s16,
>> > 96 kb/s
>> >     Metadata:
>> >       creation_time   : 1948-08-31 11:42:22
>> >       handler_name    : SoundHandle
>> >
>> >
>> > I managed to build FFMPEG 2.4 and it is working. I can compress sound
>> with
>> > parameters 96000 and sampling rate 16000. However there is problem with
>> > applying patch aac-improvements-wip-v8g.It failes with info:  1 out of 3
>> > hunks FAILED -- saving rejects to file libavcodec/psymodel.h.rej.  File
>> > psymodel.h.rej looks following:
>>
>> I guess it needs rebasing. I didn't think there were changes to those
>> files after the last rebase, but I guess there were.
>>
>>
>> > Build fails with:
>> >
>> > libavcodec/aaccoder.c:910:13: error: implicit declaration of function
>> > '_AAC_CUTOFF' [-Werror=implicit-function-declaration]
>> > libavcodec/aaccoder.c:814:44: warning: variable 'energies' set but not
>> used
>> > [-Wunused-but-set-variable]
>> > libavcodec/aaccoder.c: At top level:
>> > libavcodec/aaccoder.c:366:14: warning: 'find_max_absval' defined but not
>> > used [-Wunused-function]
>> > cc1: some warnings being treated as errors
>> >
>> > make: *** [libavcodec/aaccoder.o] Error 1
>> > make: *** Waiting for unfinished jobs....
>> > CC    libavcodec/aacenc.o
>> > libavcodec/aacdec.c: In function 'imdct_and_windowing_eld':
>> > libavcodec/aacdec.c:2590:29: warning: array subscript is above array
>> bounds
>> > [-Warray-bounds]
>> > libavcodec/aacdec.c:2596:29: warning: array subscript is above array
>> bounds
>> > [-Warray-bounds]
>> > Native build complete, exiting...
>> > marcin at marcin:~/android-dev/FFFMPEG_BUILDS/ffmpeg-2.4-build-scrypts$
>>
>> Why are warnings treated as errors?
>>
>> > Good info is that with 2.4 it is working but it would be very good to
>> apply
>> > this patch to improve quality of aac. Is there any fix for this patch
>> > problem??
>>
>> Yeah, rebasing. I'll do so when I find the time.
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>>
>
>
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