Opus from bestaudio(m4a)-audiosource?

[cyberpunkbln]

Hello,

a short Question, i want to extract and convert from a youtube-videosource to opus and receive following failure (url was only a test):

youtube-dl.exe -x --audio-format opus https://www.youtube.com/watch?v=eoVE4YufWR0
ERROR: audio conversion failed: Conversion failed!

Also the same with -f bestaudio, what was the same.

I know i can directly sniff webm/opus-audio but i have this tried for recovert in one step. mp4-audio with the best quality to an opus audio with experimental quality options. So i want to use youtube-dl for converting source-audio to opus in one step.

ffmpeg version N-87306-g6743351 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 7.2.0 (GCC)
  configuration: --enable-gpl --enable-version3 --enable-cuda --enable-cuvid --enable-d3d11va --enable-dxva2 --enable-libmfx --enable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --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-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib
  libavutil      55. 75.100 / 55. 75.100
  libavcodec     57.106.101 / 57.106.101
  libavformat    57. 82.100 / 57. 82.100
  libavdevice    57.  8.101 / 57.  8.101
  libavfilter     6.105.100 /  6.105.100
  libswscale      4.  7.103 /  4.  7.103
  libswresample   2.  8.100 /  2.  8.100
  libpostproc    54.  6.100 / 54.  6.100

Youtube-DL 2017.09.15

Yes i have read all Issues and there are written solved :).

When i use ffmpeg with the codec libopus and not opus he covert correctly.

thx

[Hrxn]

Can't you use -x --audio-fomat together with the format id (-F) from YouTube?

[dstftw]

--postprocessor-args "-strict -2".