[FFmpeg-trac] #2686(avcodec:open): Native AAC encoder collapses at high bitrates on some samples

FFmpeg trac at avcodec.org
Wed Oct 9 18:52:41 CEST 2013

#2686: Native AAC encoder collapses at high bitrates on some samples
             Reporter:  Kamedo2      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  aac          |               Blocked By:
  regression                         |  Reproduced by developer:  1
             Blocking:               |
Analyzed by developer:  0            |

Comment (by Kamedo2):

 aacenc.c line 106 and 133, this properly worked, and the result 7350Hz aac
 mp4s were playable on FFmpeg, foobar2000 v1.2.9 and Media Player Classic.
 The decoding failed on faad and WMP.
 static const uint8_t *swb_size_1024[] = {
     swb_size_1024_96, swb_size_1024_96, swb_size_1024_64,
     swb_size_1024_48, swb_size_1024_48, swb_size_1024_32,
     swb_size_1024_24, swb_size_1024_24, swb_size_1024_16,
     swb_size_1024_16, swb_size_1024_16, swb_size_1024_8, swb_size_1024_8
 static const uint8_t *swb_size_128[] = {
     /* the last entry on the following row is swb_size_128_64 but is a
        duplicate of swb_size_128_96 */
     swb_size_128_96, swb_size_128_96, swb_size_128_96,
     swb_size_128_48, swb_size_128_48, swb_size_128_48,
     swb_size_128_24, swb_size_128_24, swb_size_128_16,
     swb_size_128_16, swb_size_128_16, swb_size_128_8, swb_size_128_8

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2686#comment:206>
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