Opus audio conversion failure

[krzyzowiec]

When trying to extract and convert audio from a youtube video into an opus-encoded audio file I get "ERROR: audio conversion failed:" with no further explanation. Both libopus0 and opus-tools are installed and I have no problems with other codecs like vorbis. I'm not sure if this is because of the ffmpeg/avconv issue in Ubuntu or a bug in youtube-dl.

Distribution: Ubuntu 13.04
Version: 2013.08.17

Debug output:

Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 589, in post_process
keep_video_wish,new_info = pp.run(info)
File "/usr/local/bin/youtube-dl/youtube_dl/PostProcessor.py", line 205, in run
raise PostProcessingError(msg)
PostProcessingError

[GeorgeSG]

I had the same issue and after an hour-long debug session with a friend of mine we found out that the problem was I was missing libmp3lame, which you can aquire by installing libavcodec-extra-53 :)

Hope that fixes it for you too :)

[krzyzowiec]

You had me excited with that response, unfortunately the solution isn't as easy for me, as libavcodec-extra-53 is already installed on my system :(

I'm debating trying another distro just to see if it is ubuntu-specific.

[phihag]

Thanks for the report. We should definitely include more debugging information. Can you post the entire output of youtube-dl when called with -v? That may give some helpful hints.

[krzyzowiec]

Sure,

[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['-v', '-x', '--audio-format=opus', 'https://www.youtube.com/watch?v=mOA_HBRntyo']
[debug] youtube-dl version 2013.08.17
[debug] Python version 2.7.4 - Linux-3.9.0-030900-generic-x86_64-with-Ubuntu-13.04-raring
[debug] Proxy map: {}
[youtube] Setting language
[youtube] mOA_HBRntyo: Downloading video webpage
[youtube] mOA_HBRntyo: Downloading video info webpage
[youtube] mOA_HBRntyo: Extracting video information
[download] Xan - To The Clouds-mOA_HBRntyo.mp4 has already been downloaded
[avconv] Destination: Xan - To The Clouds-mOA_HBRntyo.opus
ERROR: audio conversion failed:
Traceback (most recent call last):
File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 589, in post_process
keep_video_wish,new_info = pp.run(info)
File "/usr/local/bin/youtube-dl/youtube_dl/PostProcessor.py", line 205, in run
raise PostProcessingError(msg)
PostProcessingError

[GeorgeSG]

Tried it here, doesn't work for me either, because of the opus file format. With mp3 works fine.

[jaimeMF]

I've installed ffmpeg with opus support:

$ffmpeg -version
ffmpeg version 1.2.4
built on Oct 12 2013 12:40:16 with Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn)
configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libopus
libavutil      52. 18.100 / 52. 18.100
libavcodec     54. 92.100 / 54. 92.100
libavformat    54. 63.104 / 54. 63.104
libavdevice    54.  3.103 / 54.  3.103
libavfilter     3. 42.103 /  3. 42.103
libswscale      2.  2.100 /  2.  2.100
libswresample   0. 17.102 /  0. 17.102
libpostproc    52.  2.100 / 52.  2.100

The error I get is youtube_dl.utils.PostProcessingError: audio conversion failed: Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height
If I run the same following ffmpeg command (the one youtube-dl executes):

ffmpeg -y -i 'Xan - To The Clouds-mOA_HBRntyo.mp4' -vn -acodec opus -aq 5 'Xan - To The Clouds-mOA_HBRntyo.opus'
ffmpeg version 1.2.4 Copyright (c) 2000-2013 the FFmpeg developers
  built on Oct 12 2013 12:40:16 with Apple LLVM version 4.2 (clang-425.0.28) (based on LLVM 3.2svn)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-libopus
  libavutil      52. 18.100 / 52. 18.100
  libavcodec     54. 92.100 / 54. 92.100
  libavformat    54. 63.104 / 54. 63.104
  libavdevice    54.  3.103 / 54.  3.103
  libavfilter     3. 42.103 /  3. 42.103
  libswscale      2.  2.100 /  2.  2.100
  libswresample   0. 17.102 /  0. 17.102
  libpostproc    52.  2.100 / 52.  2.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Xan - To The Clouds-mOA_HBRntyo.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    creation_time   : 2013-08-17 06:09:54
  Duration: 00:06:01.98, start: 0.000000, bitrate: 1152 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720, 957 kb/s, 29.97 fps, 29.97 tbr, 60k tbn, 59.94 tbc
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 191 kb/s
    Metadata:
      creation_time   : 2013-08-17 06:09:57
      handler_name    : IsoMedia File Produced by Google, 5-11-2011
[libopus @ 0x7ffedb0e4800] No bit rate set. Defaulting to 96000 bps.
[libopus @ 0x7ffedb0e4800] Quality-based encoding not supported, please specify a bitrate and VBR setting.
Output #0, ogg, to 'Xan - To The Clouds-mOA_HBRntyo.opus':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: isommp42
    Stream #0:0(und): Audio: opus, 48000 Hz, stereo, flt, 96 kb/s
    Metadata:
      creation_time   : 2013-08-17 06:09:57
      handler_name    : IsoMedia File Produced by Google, 5-11-2011
Stream mapping:
  Stream #0:1 -> #0:0 (aac -> libopus)
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or height

The problem is with the -aq 5 option, if I drop it everything works fine, according to the ffmpeg docs, it has a codec specific meaning.

[jaimeMF]

It's fixed now, but you'll need to install a version of ffmpeg built with the --enable-libopus.
Thanks for the rerports!

[kstohr]

I am getting the same error message using youtube-dl installed with --enable-libopus. I am trying to extract audio from an .mp4 file. The audio codec in the container is 'aac'. I am trying to extract the audio and convert it to ogg/opus for transcription. Any insight into why this is happening very much appreciated.

I have tried uninstalling and reinstalling/compiling both Youtube-dl and FFMPEG. I confirmed that libopus is enabled.

I get the following error message running Python 3.6.2 on OS 10.11.6 with FFMPEG 3.3.4 using the sample code provided for embedding youtube-dl in python scripts:

Python 3.6.2 (default, Jul 17 2017, 16:44:47) [GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.42.1)] on darwin Type "help", "copyright", "credits" or "license" for more information. from pblc.audio_video_utils import DownloadConvert file_input = "https://s3-us-west-2.amazonaws.com/pblc02/media/test_video/sausalito_nov2016_5min_conv.mp4" file_output = './test/test_files/sausalito_nov2016_5min_conv.ogg' audio_codec = 'opus' dl = DownloadConvert(file_input, file_output, audio_codec) dl.download_convert_file() Done downloading, now converting ... ERROR: audio conversion failed: Conversion failed!

Here is the traceback:

Traceback (most recent call last): File "/Users/kate/dev/pblc_dev/pblc_02/web_app/venv3/lib/python3.6/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 234, in run_ffmpeg FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts) File "/Users/kate/dev/pblc_dev/pblc_02/web_app/venv3/lib/python3.6/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 208, in run_ffmpeg self.run_ffmpeg_multiple_files([path], out_path, opts) File "/Users/kate/dev/pblc_dev/pblc_02/web_app/venv3/lib/python3.6/site-packages/youtube_dl/postprocessor/ffmpeg.py", line 204, in run_ffmpeg_multiple_files raise FFmpegPostProcessorError(msg) youtube_dl.postprocessor.ffmpeg.FFmpegPostProcessorError: Conversion failed!'
Converting to flac works just fine:

2.amazonaws.com/pblc02/media/test_video/sausalito_nov2016_5min_conv.mp4" file_output = './test/test_files/sausalito_nov2016_5min_conv.flac' audio_codec = 'flac' dl = DownloadConvert(file_input, file_output, audio_codec) dl.download_convert_file() Done downloading, now converting ... File conversion done.
`
FFMPEG config info:

$ ffmpeg -version ffmpeg version 3.3.4 Copyright (c) 2000-2017 the FFmpeg developers built with Apple LLVM version 8.0.0 (clang-800.0.42.1) configuration: --prefix=/usr/local/Cellar/ffmpeg/3.3.4 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-gpl --enable-libmp3lame --enable-libopus --enable-libx264 --enable-libxvid --enable-opencl --enable-videotoolbox --disable-lzma --enable-vda libavutil 55. 58.100 / 55. 58.100 libavcodec 57. 89.100 / 57. 89.100 libavformat 57. 71.100 / 57. 71.100 libavdevice 57. 6.100 / 57. 6.100 libavfilter 6. 82.100 / 6. 82.100 libavresample 3. 5. 0 / 3. 5. 0 libswscale 4. 6.100 / 4. 6.100 libswresample 2. 7.100 / 2. 7.100 libpostproc 54. 5.100 / 54. 5.100