[FFmpeg-trac] #1495(swresample:open): resample / ac3 encoding regression (was: H263+MP3 -> .vob (MPEG2 + AC3) = corrupt audio)

[FFmpeg]

#1495: resample / ac3 encoding regression
-------------------------------------+-------------------------------------
             Reporter:  grolschie    |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
              Version:  git-master   |  swresample
             Keywords:  regression   |               Resolution:
  ac3                                |               Blocked By:
             Blocking:               |  Reproduced by developer:  1
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:   => regression ac3
 * status:  new => open
 * component:  undetermined => swresample
 * reproduced:  0 => 1


Comment:

 Regression since 4ccf6e3, not reproducible with wav and mp2
 {{{
 $ ffmpeg -i input_stream.flv -ar 48k out.ac3
 ffmpeg -i input_stream.flv -ar 48k out.ac3
 ffmpeg version N-42057-g8a85660 Copyright (c) 2000-2012 the FFmpeg
 developers
   built on Jun 30 2012 10:59:19 with gcc 4.3.2
   configuration: --cc=/usr/local/gcc-4.3.2/bin/gcc --enable-gpl --enable-
 libopenjpeg --enable-libvorbis --enable-libspeex --enable-libmp3lame
 --enable-libtheora --extra-ldflags=-lm --enable-libvpx --enable-libxavs
 --enable-libfaac --enable-nonfree
   libavutil      51. 63.100 / 51. 63.100
   libavcodec     54. 31.100 / 54. 31.100
   libavformat    54. 14.100 / 54. 14.100
   libavdevice    54.  0.100 / 54.  0.100
   libavfilter     3.  0.100 /  3.  0.100
   libswscale      2.  1.100 /  2.  1.100
   libswresample   0. 15.100 /  0. 15.100
   libpostproc    52.  0.100 / 52.  0.100
 Input #0, flv, from 'input_stream.flv':
   Metadata:
     metadatacreator : Yet Another Metadata Injector for FLV - Version 1.4
     hasKeyframes    : true
     hasVideo        : true
     hasAudio        : true
     hasMetadata     : true
     canSeekToEnd    : true
     datasize        : 1978772
     videosize       : 1716367
     audiosize       : 254789
     lasttimestamp   : 30
     lastkeyframetimestamp: 30
     lastkeyframelocation: 1975246
     encoder         : Lavf54.11.100
   Duration: 00:00:30.27, start: 0.000000, bitrate: 366 kb/s
     Stream #0:0: Video: flv1, yuv420p, 450x360, 200 kb/s, 25 tbr, 1k tbn,
 1k tbc
     Stream #0:1: Audio: mp3, 22050 Hz, stereo, s16, 64 kb/s
 [graph 0 input from stream 0:1 @ 0x90cbf80] tb:1/1000 samplefmt:s16
 samplerate:22050 chlayout:0x3
 [auto-inserted resampler 0 @ 0x90d3f60] chl:stereo fmt:s16 r:22050Hz ->
 chl:stereo fmt:flt r:48000Hz
 Output #0, ac3, to 'out.ac3':
   Metadata:
     metadatacreator : Yet Another Metadata Injector for FLV - Version 1.4
     hasKeyframes    : true
     hasVideo        : true
     hasAudio        : true
     hasMetadata     : true
     canSeekToEnd    : true
     datasize        : 1978772
     videosize       : 1716367
     audiosize       : 254789
     lasttimestamp   : 30
     lastkeyframetimestamp: 30
     lastkeyframelocation: 1975246
     encoder         : Lavf54.14.100
     Stream #0:0: Audio: ac3, 48000 Hz, stereo, flt, 192 kb/s
 Stream mapping:
   Stream #0:1 -> #0:0 (mp3 -> ac3)
 Press [q] to stop, [?] for help
 size=     698kB time=00:00:29.75 bitrate= 192.0kbits/s
 video:0kB audio:698kB subtitle:0 global headers:0kB muxing overhead
 0.000000%
 }}}

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1495#comment:4>
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