diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index 7e504b75c..42ef13786 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -92,6 +92,8 @@ from .extractor import gen_extractors
 from .version import __version__
 from .YoutubeDL import YoutubeDL
 from .postprocessor import (
+    AtomicParsleyPP,
+    FFmpegAudioFixPP,
     FFmpegMetadataPP,
     FFmpegVideoConvertor,
     FFmpegExtractAudioPP,
@@ -503,6 +505,8 @@ def parseOpts(overrideArguments=None):
             help='do not overwrite post-processed files; the post-processed files are overwritten by default')
     postproc.add_option('--embed-subs', action='store_true', dest='embedsubtitles', default=False,
             help='embed subtitles in the video (only for mp4 videos)')
+    postproc.add_option('--embed-thumbnail', action='store_true', dest='embedthumbnail', default=False,
+            help='embed thumbnail in the audio as cover art')
     postproc.add_option('--add-metadata', action='store_true', dest='addmetadata', default=False,
             help='write metadata to the video file')
     postproc.add_option('--xattrs', action='store_true', dest='xattrs', default=False,
@@ -808,6 +812,10 @@ def _real_main(argv=None):
             ydl.add_post_processor(FFmpegEmbedSubtitlePP(subtitlesformat=opts.subtitlesformat))
         if opts.xattrs:
             ydl.add_post_processor(XAttrMetadataPP())
+        if opts.embedthumbnail:
+            if not opts.addmetadata:
+                ydl.add_post_processor(FFmpegAudioFixPP())
+            ydl.add_post_processor(AtomicParsleyPP())
 
         # Update version
         if opts.update_self:
diff --git a/youtube_dl/postprocessor/__init__.py b/youtube_dl/postprocessor/__init__.py
index 7f19f717f..08e6ddd00 100644
--- a/youtube_dl/postprocessor/__init__.py
+++ b/youtube_dl/postprocessor/__init__.py
@@ -1,5 +1,7 @@
 
+from .atomicparsley import AtomicParsleyPP
 from .ffmpeg import (
+    FFmpegAudioFixPP,
     FFmpegMergerPP,
     FFmpegMetadataPP,
     FFmpegVideoConvertor,
@@ -9,6 +11,8 @@ from .ffmpeg import (
 from .xattrpp import XAttrMetadataPP
 
 __all__ = [
+    'AtomicParsleyPP',
+    'FFmpegAudioFixPP',
     'FFmpegMergerPP',
     'FFmpegMetadataPP',
     'FFmpegVideoConvertor',
diff --git a/youtube_dl/postprocessor/atomicparsley.py b/youtube_dl/postprocessor/atomicparsley.py
new file mode 100644
index 000000000..765b2d9ee
--- /dev/null
+++ b/youtube_dl/postprocessor/atomicparsley.py
@@ -0,0 +1,56 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+
+import os
+import subprocess
+
+from .common import PostProcessor
+
+from ..utils import (
+    check_executable,
+    compat_urlretrieve,
+    encodeFilename,
+    PostProcessingError,
+    prepend_extension,
+    shell_quote
+)
+
+
+class AtomicParsleyPPError(PostProcessingError):
+    pass
+
+
+class AtomicParsleyPP(PostProcessor):
+    def run(self, info):
+        if not check_executable('AtomicParsley', ['-v']):
+            raise AtomicParsleyPPError('AtomicParsley was not found. Please install.')
+
+        filename = info['filepath']
+        temp_filename = prepend_extension(filename, 'temp')
+        temp_thumbnail = prepend_extension(filename, 'thumb')
+
+        if not info.get('thumbnail'):
+            raise AtomicParsleyPPError('Thumbnail was not found. Nothing to do.')
+
+        compat_urlretrieve(info['thumbnail'], temp_thumbnail)
+
+        cmd = ['AtomicParsley', filename, '--artwork', temp_thumbnail, '-o', temp_filename]
+
+        self._downloader.to_screen('[atomicparsley] Adding thumbnail to "%s"' % filename)
+
+        if self._downloader.params.get('verbose', False):
+            self._downloader.to_screen('[debug] AtomicParsley command line: %s' % shell_quote(cmd))
+
+        p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        stdout, stderr = p.communicate()
+
+        if p.returncode != 0:
+            msg = stderr.decode('utf-8', 'replace').strip()
+            raise AtomicParsleyPPError(msg)
+
+        os.remove(encodeFilename(filename))
+        os.remove(encodeFilename(temp_thumbnail))
+        os.rename(encodeFilename(temp_filename), encodeFilename(filename))
+
+        return True, info
diff --git a/youtube_dl/postprocessor/ffmpeg.py b/youtube_dl/postprocessor/ffmpeg.py
index 8922920cd..602e370f4 100644
--- a/youtube_dl/postprocessor/ffmpeg.py
+++ b/youtube_dl/postprocessor/ffmpeg.py
@@ -464,7 +464,11 @@ class FFmpegMetadataPP(FFmpegPostProcessor):
         filename = info['filepath']
         temp_filename = prepend_extension(filename, 'temp')
 
-        options = ['-c', 'copy']
+        if info['ext'] == u'm4a':
+            options = ['-vn', '-acodec', 'copy']
+        else:
+            options = ['-c', 'copy']
+
         for (name, value) in metadata.items():
             options.extend(['-metadata', '%s=%s' % (name, value)])
 
@@ -483,3 +487,17 @@ class FFmpegMergerPP(FFmpegPostProcessor):
         self.run_ffmpeg_multiple_files(info['__files_to_merge'], filename, args)
         return True, info
 
+
+class FFmpegAudioFixPP(FFmpegPostProcessor):
+    def run(self, info):
+        filename = info['filepath']
+        temp_filename = prepend_extension(filename, 'temp')
+
+        options = ['-vn', '-acodec', 'copy']
+        self._downloader.to_screen(u'[ffmpeg] Fixing audio file "%s"' % filename)
+        self.run_ffmpeg(filename, temp_filename, options)
+
+        os.remove(encodeFilename(filename))
+        os.rename(encodeFilename(temp_filename), encodeFilename(filename))
+
+        return True, info