WARNING: unable to obtain file audio codec with ffprobe

[felixhelix]

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Make sure you are using the latest version: run youtube-dl --version and ensure your version is 2017.05.01. If it's not read this FAQ entry and update. Issues with outdated version will be rejected.

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If the purpose of this issue is a bug report, site support request or you are not completely sure provide the full verbose output as follows:

Add -v flag to your command line you run youtube-dl with, copy the whole output and insert it here. It should look similar to one below (replace it with your log inserted between triple ```):

 youtube-dl --extract-audio --audio-format best -v https://www.youtube.com/watch?v=i9-AtHiVHPo&list=PLp1hlZQFN4XzZHrG9tLWxPs6dJSvPmuTl
[debug] System config: []
[debug] User config: ['-x', '--no-mtime', '-o', '~/Music/%(title)s.%(ext)s']
[debug] Custom config: []
[debug] Command-line args: ['--extract-audio', '--audio-format', 'best', '-v', 'https://www.youtube.com/watch?v=i9-AtHiVHPo']
[debug] Encodings: locale UTF-8, fs utf-8, out UTF-8, pref UTF-8
[debug] youtube-dl version 2017.05.01
[debug] Python version 3.5.2 - Linux-3.5.0-61-generic-x86_64-with-debian-wheezy-sid
[debug] exe versions: avconv 0.8.17-4, avprobe 0.8.17-4, ffmpeg 0.8.17-4, ffprobe 0.8.17-4
[debug] Proxy map: {}
[youtube] i9-AtHiVHPo: Downloading webpage
[youtube] i9-AtHiVHPo: Downloading video info webpage
[youtube] i9-AtHiVHPo: Extracting video information
[youtube] {43} signature length 40.40, html5 player vflppxuSE
[youtube] {18} signature length 40.40, html5 player vflppxuSE
[youtube] {36} signature length 40.40, html5 player vflppxuSE
[youtube] {17} signature length 40.40, html5 player vflppxuSE
[youtube] {134} signature length 40.40, html5 player vflppxuSE
[youtube] {243} signature length 40.40, html5 player vflppxuSE
[youtube] {133} signature length 40.40, html5 player vflppxuSE
[youtube] {242} signature length 40.40, html5 player vflppxuSE
[youtube] {160} signature length 40.40, html5 player vflppxuSE
[youtube] {278} signature length 40.40, html5 player vflppxuSE
[youtube] {140} signature length 40.40, html5 player vflppxuSE
[youtube] {171} signature length 40.40, html5 player vflppxuSE
[youtube] {249} signature length 40.40, html5 player vflppxuSE
[youtube] {250} signature length 40.40, html5 player vflppxuSE
[youtube] {251} signature length 40.40, html5 player vflppxuSE
[debug] Invoking downloader on 'https://r6---sn-oxujvavbox-jbol.googlevideo.com/videoplayback?requiressl=yes&initcwndbps=1475000&gir=yes&mime=audio%2Fwebm&key=yt6&mm=31&mn=sn-oxujvavbox-jbol&id=o-AA9yK2f6EUYEVmAdO2-Ux1FD4NlKqd7iI-dV_rO0qIEJ&keepalive=yes&clen=2865566&ip=87.79.41.237&mt=1493841506&mv=m&sparams=clen%2Cdur%2Cei%2Cgir%2Cid%2Cinitcwndbps%2Cip%2Cipbits%2Citag%2Ckeepalive%2Clmt%2Cmime%2Cmm%2Cmn%2Cms%2Cmv%2Cpl%2Crequiressl%2Csource%2Cupn%2Cexpire&ms=au&pl=21&ei=ozYKWbmRC4ekWfn_mPgB&itag=251&source=youtube&upn=2omFoRaIoXU&ipbits=0&dur=164.361&expire=1493863171&lmt=1449597680032446&signature=5769190B5B901FF2C93B2861E36BC7D6646AAF99.E3695D2B1CC1785F63D46968F6BF42823936022E&ratebypass=yes'
[download] /home/felix/Music/Rocco Granata - Marina 2009.webm has already been downloaded
[download] 100% of 2.73MiB
[debug] avconv command line: avprobe -show_streams 'file:/home/felix/Music/Rocco Granata - Marina 2009.webm'
ERROR: WARNING: unable to obtain file audio codec with ffprobe
Traceback (most recent call last):
  File "/usr/local/bin/youtube-dl/youtube_dl/YoutubeDL.py", line 1942, in post_process
    files_to_delete, info = pp.run(info)
  File "/usr/local/bin/youtube-dl/youtube_dl/postprocessor/ffmpeg.py", line 241, in run
    raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe')
youtube_dl.utils.PostProcessingError: WARNING: unable to obtain file audio codec with ffprobe

Description of your issue, suggested solution and other information

The downloaded file cannot be converted.
I also checked that ffprobe version:
ffprobe -version
avprobe version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2007-2014 the Libav developers
built on Apr 1 2016 14:24:20 with gcc 4.6.3
avprobe 0.8.17-4:0.8.17-0ubuntu0.12.04.2
libavutil 51. 22. 3 / 51. 22. 3
libavcodec 53. 35. 0 / 53. 35. 0
libavformat 53. 21. 1 / 53. 21. 1
libavdevice 53. 2. 0 / 53. 2. 0
libavfilter 2. 15. 0 / 2. 15. 0
libswscale 2. 1. 0 / 2. 1. 0
libpostproc 52. 0. 0 / 52. 0. 0

And also:

ffprobe -show_streams 'file:/home/felix/Music/Rocco Granata - Marina 2009.webm'
avprobe version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2007-2014 the Libav developers
built on Apr 1 2016 14:24:20 with gcc 4.6.3
[matroska,webm @ 0x1f769a0] Unknown entry 0x56AA
[matroska,webm @ 0x1f769a0] Unknown entry 0x56BB
[matroska,webm @ 0x1f769a0] Unknown/unsupported CodecID A_OPUS.
[matroska,webm @ 0x1f769a0] Unknown entry 0x75A2
[matroska,webm @ 0x1f769a0] decoding for stream 0 failed
[matroska,webm @ 0x1f769a0] Estimating duration from bitrate, this may be inaccurate
file:/home/felix/Music/Rocco Granata - Marina 2009.webm: Operation not permitted

Seems like ffprobe isn't configured correctly, but I don't know how to fix it :-(

[yan12125]

0.8.17 is too old and broken in this case. The latest ffmpeg should fix it. You may want to specify --prefer-ffmpeg so that old avprobe won't be used.

[felixhelix]

Thanks for the quick reply :-)
However, using --prefer-ffmpeg didn't solve the issue. I will try to install an updated version of ffprobe and see if that will do.