Questão ffmpeg flac para aac (libdfdk_aac) metadados ausentes


Eu quero converter um álbum de flac para aac. Depois de converter o arquivo aac, faltam todos os metadados do arquivo flac original. Eu já tentei convertê-lo com o -map_metadata 0 argumento

Meu comando ficou assim:

ffmpeg -i input.flac -c:a libfdk_aac -b:a 320k -map_metadata 0 output.aac

A saída:

ffmpeg version N-80283-g84efdab Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 46.100 / 57. 46.100
  libavformat    57. 37.101 / 57. 37.101
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.101 /  6. 46.101
  libavresample   3.  0.  0 /  3.  0.  0
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
Input #0, flac, from 'Gareth Coker feat. Aeralie Brighton - 01. Ori, Lost In .flac':
  Metadata:
    ALBUM           : Ori and the Blind Forest (Original Soundtrack)
    TITLE           : Ori, Lost In the Storm (feat. Aeralie Brighton)
    ARTIST          : Gareth Coker feat. Aeralie Brighton
    album_artist    : Gareth Coker
    comment         : Purchased from 7digital.com
    track           : 1
    disc            : 1
    TRACKTOTAL      : 32
    GENRE           : Soundtracks
    DATE            : 2015
    COPYRIGHT       : (p) Microsoft
  Duration: 00:01:08.20, start: 0.000000, bitrate: 726 kb/s
    Stream #0:0: Audio: flac, 44100 Hz, stereo, s16
    Stream #0:1: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 800x800 [SAR 96:96 DAR 1:1], 90k tbr, 90k tbn, 90k tbc
    Metadata:
      comment         : Cover (front)
      title           : cover.jpg
File '../../../Desktop/aac/output.aac' already exists. Overwrite ? [y/N] y
[adts @ 0x1fb9880] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
Output #0, adts, to '../../../Desktop/aac/output.aac':
  Metadata:
    ALBUM           : Ori and the Blind Forest (Original Soundtrack)
    TITLE           : Ori, Lost In the Storm (feat. Aeralie Brighton)
    ARTIST          : Gareth Coker feat. Aeralie Brighton
    album_artist    : Gareth Coker
    comment         : Purchased from 7digital.com
    track           : 1
    disc            : 1
    TRACKTOTAL      : 32
    GENRE           : Soundtracks
    DATE            : 2015
    COPYRIGHT       : (p) Microsoft
    encoder         : Lavf57.37.101
    Stream #0:0: Audio: aac (libfdk_aac), 44100 Hz, stereo, s16, 320 kb/s
    Metadata:
      encoder         : Lavc57.46.100 libfdk_aac
Stream mapping:
  Stream #0:0 -> #0:0 (flac (native) -> aac (libfdk_aac))
Press [q] to stop, [?] for help
size=    2667kB time=00:01:08.22 bitrate= 320.2kbits/s speed=34.9x
video:0kB audio:2667kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000000%

E a saída ffmpeg -i do arquivo aac:

ffmpeg version N-80283-g84efdab Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 4.8 (Ubuntu 4.8.4-2ubuntu1~14.04.3)
  configuration: --extra-libs=-ldl --prefix=/opt/ffmpeg --mandir=/usr/share/man --enable-avresample --disable-debug --enable-nonfree --enable-gpl --enable-version3 --enable-libopencore-amrnb --enable-libopencore-amrwb --disable-decoder=amrnb --disable-decoder=amrwb --enable-libpulse --enable-libfreetype --enable-gnutls --enable-libx264 --enable-libx265 --enable-libfdk-aac --enable-libvorbis --enable-libmp3lame --enable-libopus --enable-libvpx --enable-libspeex --enable-libass --enable-avisynth --enable-libsoxr --enable-libxvid --enable-libvidstab
  libavutil      55. 24.100 / 55. 24.100
  libavcodec     57. 46.100 / 57. 46.100
  libavformat    57. 37.101 / 57. 37.101
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 46.101 /  6. 46.101
  libavresample   3.  0.  0 /  3.  0.  0
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  0.101 /  2.  0.101
  libpostproc    54.  0.100 / 54.  0.100
[aac @ 0x3453660] Estimating duration from bitrate, this may be inaccurate
Input #0, aac, from '../../../Desktop/aac/output.aac':
  Duration: 00:01:08.84, bitrate: 317 kb/s
    Stream #0:0: Audio: aac (LC), 44100 Hz, stereo, fltp, 317 kb/s
At least one output file must be specified

0


origem




Respostas:


.aac é um fluxo de bits AAC bruto e não contém metadados. Saída para .m4a ou talvez até .mp4.


1



Agradeço um bocado, eu tinha certeza que aac é um formato de contêiner. - febLey