[soundcloud] Can't add metadata info to m4a

[diffycat]

$ youtube-dl https://soundcloud.com/thelivingtombstone/tombmobilehiphop1 --verbose --add-metadata 
[debug] System config: []
[debug] User config: []
[debug] Command-line args: ['https://soundcloud.com/thelivingtombstone/tombmobilehiphop1', '--verbose', '--add-metadata']
[debug] Encodings: locale 'UTF-8', fs 'utf-8', out 'UTF-8', pref: 'UTF-8'
[debug] youtube-dl version 2013.12.26
[debug] Python version 3.3.3 - Linux-3.12.6-1-ARCH-x86_64-with-arch-Arch-Linux
[debug] Proxy map: {}
[soundcloud] thelivingtombstone/tombmobilehiphop1: Resolving id
[soundcloud] thelivingtombstone/tombmobilehiphop1: Downloading info JSON
[download] TombMobileHiphop1-31218527.m4a has already been downloaded
[ffmpeg] Adding metadata to 'TombMobileHiphop1-31218527.m4a'
[debug] ffmpeg command line: ffmpeg -y -i TombMobileHiphop1-31218527.m4a -c copy -metadata title=TombMobileHiphop1 -metadata date=20111221 -metadata 'artist=The Living Tombstone' -f m4a TombMobileHiphop1-31218527.m4a.temp
ERROR: TombMobileHiphop1-31218527.m4a.temp: Invalid argument
Traceback (most recent call last):
  File "/usr/lib/python3.3/site-packages/youtube_dl/YoutubeDL.py", line 942, in post_process
    keep_video_wish, new_info = pp.run(info)
  File "/usr/lib/python3.3/site-packages/youtube_dl/PostProcessor.py", line 508, in run
    self.run_ffmpeg(filename, temp_filename, options)
  File "/usr/lib/python3.3/site-packages/youtube_dl/PostProcessor.py", line 102, in run_ffmpeg
    self.run_ffmpeg_multiple_files([path], out_path, opts)
  File "/usr/lib/python3.3/site-packages/youtube_dl/PostProcessor.py", line 99, in run_ffmpeg_multiple_files
    raise FFmpegPostProcessorError(msg)
youtube_dl.PostProcessor.FFmpegPostProcessorError: TombMobileHiphop1-31218527.m4a.temp: Invalid argument

[jaimeMF]

Fixed, thanks for the report.