[FFmpeg-trac] #3525(undetermined:reopened): AAC to PCM produced a lot of noise!

FFmpeg trac at avcodec.org
Thu Apr 3 22:00:04 CEST 2014

#3525: AAC to PCM produced a lot of noise!
             Reporter:  kaienfr      |                    Owner:
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
Changes (by kaienfr):

 * status:  closed => reopened
 * resolution:  invalid =>


 I've tried your suggestion to use  aresample filter, this is the code:

         ReSampleContext *rs_ctx = NULL;
         // resample to 44100, stereo, s16
         rs_ctx = av_audio_resample_init(
                 2, pCodecCtx->channels,
                 44100, pCodecCtx->sample_rate,
                 AV_SAMPLE_FMT_S16, pCodecCtx->sample_fmt,
                 16, 10, 0, 1);
         outbuff = (uint8_t*)av_malloc(AVCODEC_MAX_AUDIO_FRAME_SIZE);


         // resampling
         after_sampled_len = audio_resample(rs_ctx, (short *)outbuff,
 (short *)pFrame->extended_data, pFrame->nb_samples);

 I've gotten the following errors:

 [audioresample @ 023AC060] Audio sample format conversion failed

 The same code run perfactly with old ffmpeg and got wonderful result!

 Well, what kind of problem this should be in new ffmpeg? Obviously, there
 is something abnormal in the new version.
 If the way to use it is changed, PLEASE clarify it. I am looking forward
 to your help. Thank you very much indeed!

Ticket URL: <https://trac.ffmpeg.org/ticket/3525#comment:4>
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