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Old 6th November 2014, 22:24   #1
Junior Member
Join Date: Nov 2007
Posts: 48
Unable to play m4a from YouTube (youtube-dl -f 141)

I used youtube-dl to download the m4a audio from YouTube:

c:\music> youtube-dl -f 141

The file is saved with an extension of m4a.

Unable to play using Winamp v5.666 Build 3516 (x86) - Dec 12 2013

Strangely enough, if I just download the mp4 version (with video), I can play it just fine as an audio.

I can also use ffmpeg to re-convert the m4a to another m4a. Then WinAmp plays it fine.

Latest version of VLC plays either m4a or mp4 just fine.

It is not just this URL, but any m4a I download from YouTube all behave this way when using WinAmp.

Below are some diagnostics about the URL in question and downloaded file.

c:\music>youtube-dl -F
[youtube] Confirming age
[youtube] x6NyQN4hloY: Downloading webpage
[youtube] x6NyQN4hloY: Downloading video info webpage
[youtube] x6NyQN4hloY: Extracting video information
[youtube] x6NyQN4hloY: Downloading DASH manifest
[info] Available formats for x6NyQN4hloY:
format code extension resolution note
139 m4a audio only DASH audio 55k , audio@ 48k (22050Hz), 21.06MiB (worst)
140 m4a audio only DASH audio 162k , audio@128k (44100Hz), 56.04MiB
141 m4a audio only DASH audio 292k , audio@256k (44100Hz), 111.28MiB
160 mp4 256x144 DASH video 108k , video only, 40.66MiB
133 mp4 426x240 DASH video 225k , video only, 83.60MiB
134 mp4 640x360 DASH video 164k , video only, 22.78MiB
135 mp4 854x480 DASH video 279k , video only, 36.12MiB
136 mp4 1280x720 DASH video 585k , video only, 59.62MiB
17 3gp 176x144
36 3gp 320x240
5 flv 400x240
43 webm 640x360
18 mp4 640x360
22 mp4 1280x720 (best)

c:\music>ffmpeg -i "fedde le grand essential mix-x6nyqn4hloy.m4a"

ffmpeg version N-61143-g64e4bd7 Copyright (c) 2000-2014 the FFmpeg developers
built on Mar 7 2014 00:01:08 with gcc 4.8.2 (GCC)
configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-li
bass --enable-libbluray --enable-libcaca --enable-libfreetype --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopenco
re-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidst
ab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable
libavutil 52. 66.101 / 52. 66.101
libavcodec 55. 52.102 / 55. 52.102
libavformat 55. 33.101 / 55. 33.101
libavdevice 55. 11.100 / 55. 11.100
libavfilter 4. 3.100 / 4. 3.100
libswscale 2. 5.101 / 2. 5.101
libswresample 0. 18.100 / 0. 18.100
libpostproc 52. 3.100 / 52. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'fedde le grand essential mix-x6nyqn4hloy.m4a':
major_brand : dash
minor_version : 0
compatible_brands: iso6mp41
creation_time : 2014-11-05 08:39:44
Duration: 01:01:00.05, start: 0.000000, bitrate: 255 kb/s
Stream #0:0(und): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 253 kb/s (default)
creation_time : 2014-11-05 08:39:44
handler_name : SoundHandler
At least one output file must be specified
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