[embedthumbnail] Add support for mp3 cover embedding

youtube_dl/postprocessor/embedthumbnail.py

@@ -0,0 +1,87 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+
+import os
+import subprocess
+
+from .common import PostProcessor
+from ..compat import (
+    compat_urlretrieve,
+)
+from ..utils import (
+    check_executable,
+    encodeFilename,
+    PostProcessingError,
+    prepend_extension,
+    shell_quote
+)
+
+
+class EmbedThumbnailPPError(PostProcessingError):
+    pass
+
+
+class EmbedThumbnailPP(PostProcessor):
+    def run(self, info):
+        filename = info['filepath']
+        temp_filename = prepend_extension(filename, 'temp')
+        temp_thumbnail = prepend_extension(filename, 'thumb')
+
+        if not info.get('thumbnail'):
+            raise EmbedThumbnailPPError('Thumbnail was not found. Nothing to do.')
+
+        compat_urlretrieve(info['thumbnail'], temp_thumbnail)
+
+        if info['ext'] == 'mp3':
+            if not check_executable('ffmpeg', ['-version']):
+                raise AtomicParsleyPPError('FFmpeg was not found. Please install.')
+
+            cmd = ['ffmpeg', '-i', filename, '-i', temp_thumbnail, '-c', 'copy', '-map', '0', '-map', '1', '-metadata:s:v', 'title="Album cover"', '-metadata:s:v', 'comment="Cover (Front)"', temp_filename]
+
+            self._downloader.to_screen('[ffmpeg] Adding thumbnail to "%s"' % filename)
+
+            if self._downloader.params.get('verbose', False):
+                self._downloader.to_screen('[debug] FFmpeg 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 EmbedThumbnailPPError(msg)
+
+            os.remove(encodeFilename(temp_thumbnail))
+            os.remove(encodeFilename(filename))
+            os.rename(encodeFilename(temp_filename), encodeFilename(filename))
+
+        elif info['ext'] == 'm4a':
+            if not check_executable('AtomicParsley', ['-v']):
+                raise EmbedThumbnailPPError('AtomicParsley was not found. Please install.')
+
+            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 EmbedThumbnailPPError(msg)
+
+            os.remove(encodeFilename(temp_thumbnail))
+            # for formats that don't support thumbnails (like 3gp) AtomicParsley
+            # won't create to the temporary file
+            if b'No changes' in stdout:
+                self._downloader.report_warning('The file format doesn\'t support embedding a thumbnail')
+            else:
+                os.remove(encodeFilename(filename))
+                os.rename(encodeFilename(temp_filename), encodeFilename(filename))
+        else:
+            raise EmbedThumbnailPPError('Only mp3 and m4a are supported for thumbnail embedding for now.')
+
+        return [], info