ffmpeg flac to opus mka copy album art cover jpg

01.txt

$ ffmpeg -hide_banner -i 01.flac -c:a libopus 01.mka -y

Input #0, flac, from '01.flac':
  Metadata:
    ALBUM           : Bach - Cello Suites Nos. 1-6, BWV 1007-1012
    album_artist    : Henrik Dam Thomsen
    ARTIST          : Henrik Dam Thomsen
    COMPOSER        : Johann Sebastian Bach
    DATE            : 2024
    GENRE           : Classical
    TITLE           : Cello Suite No. 1 in G Major, BWV 1007: I. Prélude
    track           : 1
    TRACKTOTAL      : 36
  Duration: 00:02:38.08, start: 0.000000, bitrate: 2500 kb/s
  Stream #0:0: Audio: flac, 96000 Hz, stereo, s32 (24 bit)
  Stream #0:1: Video: mjpeg (Baseline), yuvj420p(pc, bt470bg/unknown/unknown), 700x700, 90k tbr, 90k tbn (attached pic)
    Metadata:
      comment         : Cover (front)
Stream mapping:
  Stream #0:0 -> #0:0 (flac (native) -> opus (libopus))
Press [q] to stop, [?] for help
[libopus @ 0xaaabbff76680] No bit rate set. Defaulting to 96000 bps.
Output #0, matroska, to '01.mka':
  Metadata:
    ALBUM           : Bach - Cello Suites Nos. 1-6, BWV 1007-1012
    album_artist    : Henrik Dam Thomsen
    ARTIST          : Henrik Dam Thomsen
    COMPOSER        : Johann Sebastian Bach
    DATE            : 2024
    GENRE           : Classical
    TITLE           : Cello Suite No. 1 in G Major, BWV 1007: I. Prélude
    PART_NUMBER     : 1
    TRACKTOTAL      : 36
    encoder         : Lavf60.16.100
  Stream #0:0: Audio: opus ([255][255][255][255] / 0xFFFFFFFF), 48000 Hz, stereo, flt, 96 kb/s
    Metadata:
      encoder         : Lavc60.31.102 libopus
size=       1kB time=00:00:00.01 bitrate= 504.3kbits/s speed=34.3x    
size=     512kB time=00:00:47.23 bitrate=  88.8kbits/s speed=94.4x    
size=    1024kB time=00:01:33.57 bitrate=  89.6kbits/s speed=93.5x    
size=    1792kB time=00:02:18.67 bitrate= 105.9kbits/s speed=92.4x    
[out#0/matroska @ 0xaaabbffdf970] video:0kB audio:2056kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.726128%
size=    2112kB time=00:02:38.07 bitrate= 109.5kbits/s speed=91.9x