[FFmpeg-user] Ogg Encoding Warning

[Andrew Arthur]

I am extracting audio from a large number of WMV files and re-encoding them
to OGG.  My command line is below as well as the output.  In the example
given (and in many others) I get a warning message "100 buffers queued in
output stream 0:0, something may be wrong. " that I don't understand.  Is
this something that I need to address and if so how would I do that?

 

Command Line:

 

ffmpeg -i 9S01.wmv -codec:a libvorbis -vn -ac 2 -ar 44100 -ab 160k 9S01.ogg

 

Response:

 

ffmpeg version N-67742-g3f07dd6 Copyright (c) 2000-2014 the FFmpeg
developers

  built on Nov 16 2014 22:01:52 with gcc 4.9.2 (GCC)

  configuration: --enable-gpl --enable-version3 --disable-w32threads
--enable-avisynth --enable-bzlib --enable-fontconfi

g --enable-frei0r --enable-gnutls --enable-iconv --enable-libass
--enable-libbluray --enable-libbs2b --enable-libcaca --

enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc
--enable-libmodplug --enable-libmp3lame --enable-lib

opencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg
--enable-libopus --enable-librtmp --enable-libschroedinge

r --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame
--enable-libvidstab --enable-libvo-aacenc --

enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack
--enable-libwebp --enable-libx264 --enable-

libx265 --enable-libxavs --enable-libxvid --enable-zlib

  libavutil      54. 13.100 / 54. 13.100

  libavcodec     56. 12.101 / 56. 12.101

  libavformat    56. 13.100 / 56. 13.100

  libavdevice    56.  3.100 / 56.  3.100

  libavfilter     5.  2.103 /  5.  2.103

  libswscale      3.  1.101 /  3.  1.101

  libswresample   1.  1.100 /  1.  1.100

  libpostproc    53.  3.100 / 53.  3.100

Input #0, asf, from '9S01.wmv':

  Metadata:

    VBR Peak        : 10000000

    DeviceConformanceTemplate: MP at HL

    WM/WMADRCPeakReference: 23859

    WM/WMADRCPeakTarget: 23859

    WM/WMADRCAverageReference: 4536

    WM/WMADRCAverageTarget: 4536

    WMFSDKVersion   : 10.00.00.3802

    WMFSDKNeeded    : 0.0.0.0000

    IsVBR           : 1

    Buffer Average  : 2743

  Duration: 00:00:43.21, start: 0.000000, bitrate: 9064 kb/s

    Stream #0:0: Audio: wmapro (b[1][0][0] / 0x0162), 48000 Hz, 5.1, fltp,
423 kb/s

    Stream #0:1: Video: wmv3 (Main) (WMV3 / 0x33564D57), yuv420p, 1440x1080,
8000 kb/s, SAR 1:1 DAR 4:3, 24 fps, 24 tbr,

1k tbn, 1k tbc

Output #0, ogg, to '9S01.ogg':

  Metadata:

    VBR Peak        : 10000000

    DeviceConformanceTemplate: MP at HL

    WM/WMADRCPeakReference: 23859

    WM/WMADRCPeakTarget: 23859

    WM/WMADRCAverageReference: 4536

    WM/WMADRCAverageTarget: 4536

    WMFSDKVersion   : 10.00.00.3802

    WMFSDKNeeded    : 0.0.0.0000

    IsVBR           : 1

    Buffer Average  : 2743

    encoder         : Lavf56.13.100

    Stream #0:0: Audio: vorbis (libvorbis), 44100 Hz, stereo, fltp, 160 kb/s

    Metadata:

      encoder         : Lavc56.12.101 libvorbis

      VBR Peak        : 10000000

      DeviceConformanceTemplate: MP at HL

      WM/WMADRCPeakReference: 23859

      WM/WMADRCPeakTarget: 23859

      WM/WMADRCAverageReference: 4536

      WM/WMADRCAverageTarget: 4536

      WMFSDKVersion   : 10.00.00.3802

      WMFSDKNeeded    : 0.0.0.0000

      IsVBR           : 1

      Buffer Average  : 2743

Stream mapping:

  Stream #0:0 -> #0:0 (wmapro (native) -> vorbis (libvorbis))

Press [q] to stop, [?] for help

[output stream 0:0 @ 0452f880] 100 buffers queued in output stream 0:0,
something may be wrong.

size=     584kB time=00:00:43.30 bitrate= 110.4kbits/s

video:0kB audio:574kB subtitle:0kB other streams:0kB global headers:4kB
muxing overhead: 1.697067%