[FFmpeg-trac] #9922(avformat:new): unexpected sample format of mp3

[FFmpeg]

#9922: unexpected sample format of mp3
------------------------------------+--------------------------------------
             Reporter:  Mia Sia     |                     Type:  defect
               Status:  new         |                 Priority:  normal
            Component:  avformat    |                  Version:  git-master
             Keywords:  libmp3lame  |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
------------------------------------+--------------------------------------
 Summary of the bug:
 How to reproduce:
 {{{
 PS C:\Users\user\Downloads> ffmpeg -i .\in.wav -sample_fmt s32p -c:a
 libmp3lame out.mp3
 ffmpeg version 2022-05-08-git-f77ac5131c-full_build-www.gyan.dev Copyright
 (c) 2000-2022 the FFmpeg developers
   built with gcc 11.3.0 (Rev1, Built by MSYS2 project)
   configuration: --enable-gpl --enable-version3 --enable-static --disable-
 w32threads --disable-autodetect --enable-fontconfig --enable-iconv
 --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
 --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
 --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
 --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2
 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1
 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2
 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg
 --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r
 --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-
 libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
 llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
 --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc
 --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio
 --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
 libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora
 --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-
 libgsm --enable-libopencore-amrnb --enable-libopus --enabled --enable-
 libsoxr --enable-chromaprint
   libavutil      57. 24.101 / 57. 24.101
   libavcodec     59. 27.100 / 59. 27.100
   libavformat    59. 23.100 / 59. 23.100
   libavdevice    59.  6.100 / 59.  6.100
   libavfilter     8. 38.100 /  8. 38.100
   libswscale      6.  6.100 /  6.  6.100
   libswresample   4.  6.100 /  4.  6.100
   libpostproc    56.  5.100 / 56.  5.100
 Guessed Channel Layout for Input Stream #0.0 : stereo
 Input #0, wav, from '.\in.wav':
   Metadata:
     encoder         : Lavf59.23.100
   Duration: 00:00:10.00, bitrate: 1536 kb/s
   Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 48000 Hz, stereo,
 s16, 1536 kb/s
 File 'out.mp3' already exists. Overwrite? [y/N] y
 Stream mapping:
   Stream #0:0 -> #0:0 (pcm_s16le (native) -> mp3 (libmp3lame))
 Press [q] to stop, [?] for help
 Output #0, mp3, to 'out.mp3':
   Metadata:
     TSSE            : Lavf59.23.100
   Stream #0:0: Audio: mp3, 48000 Hz, stereo, '''s32p'''
     Metadata:
       encoder         : Lavc59.27.100 libmp3lame
 size=     157kB time=00:00:10.00 bitrate= 128.5kbits/s speed=33.3x
 video:0kB audio:157kB subtitle:0kB other streams:0kB global headers:0kB
 muxing overhead: 0.147653%

 ----

 PS C:\Users\user\Downloads> ffprobe -i out.mp3
 ffprobe version 2022-05-08-git-f77ac5131c-full_build-www.gyan.dev
 Copyright (c) 2007-2022 the FFmpeg developers
   built with gcc 11.3.0 (Rev1, Built by MSYS2 project)
   configuration: --enable-gpl --enable-version3 --enable-static --disable-
 w32threads --disable-autodetect --enable-fontconfig --enable-iconv
 --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma
 --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt
 --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray
 --enable-libcaca --enable-sdl2 --enable-libdav1d --enable-libdavs2
 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1
 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2
 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg
 --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r
 --enable-libfreetype --enable-libfribidi --enable-liblensfun --enable-
 libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-
 llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc
 --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-libshaderc
 --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio
 --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-
 libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora
 --enable-libtwolame --enable-libvo-amrwbenc --enable-libilbc --enable-
 libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex
 --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite
 --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-
 chromaprint
   libavutil      57. 24.101 / 57. 24.101
   libavcodec     59. 27.100 / 59. 27.100
   libavformat    59. 23.100 / 59. 23.100
   libavdevice    59.  6.100 / 59.  6.100
   libavfilter     8. 38.100 /  8. 38.100
   libswscale      6.  6.100 /  6.  6.100
   libswresample   4.  6.100 /  4.  6.100
   libpostproc    56.  5.100 / 56.  5.100
 Input #0, mp3, from 'out.mp3':
   Metadata:
     encoder         : Lavf59.23.100
   Duration: 00:00:10.03, start: 0.023021, bitrate: 128 kb/s
   Stream #0:0: Audio: mp3, 48000 Hz, stereo, '''fltp''', 128 kb/s
     Metadata:
       encoder         : Lavc59.27
 }}}
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9922>
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