[ffmpeg] Modernize

youtube_dl/postprocessor/ffmpeg.py

@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 import os
 import subprocess
 import sys
@@ -33,12 +35,12 @@ class FFmpegPostProcessor(PostProcessor):
 
     def check_version(self):
         if not self._executable:
-            raise FFmpegPostProcessorError(u'ffmpeg or avconv not found. Please install one.')
+            raise FFmpegPostProcessorError('ffmpeg or avconv not found. Please install one.')
 
         REQUIRED_VERSION = '1.0'
         if is_outdated_version(
                 self._versions[self._executable], REQUIRED_VERSION):
-            warning = u'Your copy of %s is outdated, update %s to version %s or newer if you encounter any errors.' % (
+            warning = 'Your copy of %s is outdated, update %s to version %s or newer if you encounter any errors.' % (
                 self._executable, self._executable, REQUIRED_VERSION)
             if self._downloader:
                 self._downloader.report_warning(warning)
@@ -84,7 +86,7 @@ class FFmpegPostProcessor(PostProcessor):
                [encodeFilename(self._ffmpeg_filename_argument(out_path), True)])
 
         if self._downloader.params.get('verbose', False):
-            self._downloader.to_screen(u'[debug] ffmpeg command line: %s' % shell_quote(cmd))
+            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:
@@ -100,8 +102,8 @@ class FFmpegPostProcessor(PostProcessor):
 
     def _ffmpeg_filename_argument(self, fn):
         # ffmpeg broke --, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details
-        if fn.startswith(u'-'):
-            return u'./' + fn
+        if fn.startswith('-'):
+            return './' + fn
         return fn
 
 
@@ -117,7 +119,7 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
     def get_audio_codec(self, path):
 
         if not self._probe_executable:
-            raise PostProcessingError(u'ffprobe or avprobe not found. Please install one.')
+            raise PostProcessingError('ffprobe or avprobe not found. Please install one.')
         try:
             cmd = [
                 self._probe_executable,
@@ -153,7 +155,7 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
 
         filecodec = self.get_audio_codec(path)
         if filecodec is None:
-            raise PostProcessingError(u'WARNING: unable to obtain file audio codec with ffprobe')
+            raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe')
 
         uses_avconv = self._uses_avconv()
         more_opts = []
@@ -202,7 +204,7 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
                 extension = 'wav'
                 more_opts += ['-f', 'wav']
 
-        prefix, sep, ext = path.rpartition(u'.')  # not os.path.splitext, since the latter does not work on unicode in all setups
+        prefix, sep, ext = path.rpartition('.')  # not os.path.splitext, since the latter does not work on unicode in all setups
         new_path = prefix + sep + extension
 
         # If we download foo.mp3 and convert it to... foo.mp3, then don't delete foo.mp3, silly.
@@ -211,16 +213,16 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
 
         try:
             if self._nopostoverwrites and os.path.exists(encodeFilename(new_path)):
-                self._downloader.to_screen(u'[youtube] Post-process file %s exists, skipping' % new_path)
+                self._downloader.to_screen('[youtube] Post-process file %s exists, skipping' % new_path)
             else:
-                self._downloader.to_screen(u'[' + self._executable + '] Destination: ' + new_path)
+                self._downloader.to_screen('[' + self._executable + '] Destination: ' + new_path)
                 self.run_ffmpeg(path, new_path, acodec, more_opts)
         except:
             etype, e, tb = sys.exc_info()
             if isinstance(e, AudioConversionError):
-                msg = u'audio conversion failed: ' + e.msg
+                msg = 'audio conversion failed: ' + e.msg
             else:
-                msg = u'error running ' + self._executable
+                msg = 'error running ' + self._executable
             raise PostProcessingError(msg)
 
         # Try to update the date time for extracted audio file.
@@ -228,7 +230,7 @@ class FFmpegExtractAudioPP(FFmpegPostProcessor):
             try:
                 os.utime(encodeFilename(new_path), (time.time(), information['filetime']))
             except:
-                self._downloader.report_warning(u'Cannot update utime of audio file')
+                self._downloader.report_warning('Cannot update utime of audio file')
 
         information['filepath'] = new_path
         return self._nopostoverwrites, information
@@ -241,12 +243,12 @@ class FFmpegVideoConvertor(FFmpegPostProcessor):
 
     def run(self, information):
         path = information['filepath']
-        prefix, sep, ext = path.rpartition(u'.')
+        prefix, sep, ext = path.rpartition('.')
         outpath = prefix + sep + self._preferedformat
         if information['ext'] == self._preferedformat:
-            self._downloader.to_screen(u'[ffmpeg] Not converting video file %s - already is in target format %s' % (path, self._preferedformat))
+            self._downloader.to_screen('[ffmpeg] Not converting video file %s - already is in target format %s' % (path, self._preferedformat))
             return True, information
-        self._downloader.to_screen(u'[' + 'ffmpeg' + '] Converting video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) + outpath)
+        self._downloader.to_screen('[' + 'ffmpeg' + '] Converting video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) + outpath)
         self.run_ffmpeg(path, outpath, [])
         information['filepath'] = outpath
         information['format'] = self._preferedformat
@@ -453,11 +455,11 @@ class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
         return cls._lang_map.get(code[:2])
 
     def run(self, information):
-        if information['ext'] != u'mp4':
-            self._downloader.to_screen(u'[ffmpeg] Subtitles can only be embedded in mp4 files')
+        if information['ext'] != 'mp4':
+            self._downloader.to_screen('[ffmpeg] Subtitles can only be embedded in mp4 files')
             return True, information
         if not information.get('subtitles'):
-            self._downloader.to_screen(u'[ffmpeg] There aren\'t any subtitles to embed')
+            self._downloader.to_screen('[ffmpeg] There aren\'t any subtitles to embed')
             return True, information
 
         sub_langs = [key for key in information['subtitles']]
@@ -472,8 +474,8 @@ class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
                 opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code])
         opts.extend(['-f', 'mp4'])
 
-        temp_filename = filename + u'.temp'
-        self._downloader.to_screen(u'[ffmpeg] Embedding subtitles in \'%s\'' % filename)
+        temp_filename = filename + '.temp'
+        self._downloader.to_screen('[ffmpeg] Embedding subtitles in \'%s\'' % filename)
         self.run_ffmpeg_multiple_files(input_files, temp_filename, opts)
         os.remove(encodeFilename(filename))
         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
@@ -494,13 +496,13 @@ class FFmpegMetadataPP(FFmpegPostProcessor):
             metadata['artist'] = info['uploader_id']
 
         if not metadata:
-            self._downloader.to_screen(u'[ffmpeg] There isn\'t any metadata to add')
+            self._downloader.to_screen('[ffmpeg] There isn\'t any metadata to add')
             return True, info
 
         filename = info['filepath']
         temp_filename = prepend_extension(filename, 'temp')
 
-        if info['ext'] == u'm4a':
+        if info['ext'] == 'm4a':
             options = ['-vn', '-acodec', 'copy']
         else:
             options = ['-c', 'copy']
@@ -508,7 +510,7 @@ class FFmpegMetadataPP(FFmpegPostProcessor):
         for (name, value) in metadata.items():
             options.extend(['-metadata', '%s=%s' % (name, value)])
 
-        self._downloader.to_screen(u'[ffmpeg] Adding metadata to \'%s\'' % filename)
+        self._downloader.to_screen('[ffmpeg] Adding metadata to \'%s\'' % filename)
         self.run_ffmpeg(filename, temp_filename, options)
         os.remove(encodeFilename(filename))
         os.rename(encodeFilename(temp_filename), encodeFilename(filename))
@@ -519,7 +521,7 @@ class FFmpegMergerPP(FFmpegPostProcessor):
     def run(self, info):
         filename = info['filepath']
         args = ['-c', 'copy', '-map', '0:v:0', '-map', '1:a:0', '-shortest']
-        self._downloader.to_screen(u'[ffmpeg] Merging formats into "%s"' % filename)
+        self._downloader.to_screen('[ffmpeg] Merging formats into "%s"' % filename)
         self.run_ffmpeg_multiple_files(info['__files_to_merge'], filename, args)
         return True, info
 
@@ -530,7 +532,7 @@ class FFmpegAudioFixPP(FFmpegPostProcessor):
         temp_filename = prepend_extension(filename, 'temp')
 
         options = ['-vn', '-acodec', 'copy']
-        self._downloader.to_screen(u'[ffmpeg] Fixing audio file "%s"' % filename)
+        self._downloader.to_screen('[ffmpeg] Fixing audio file "%s"' % filename)
         self.run_ffmpeg(filename, temp_filename, options)
 
         os.remove(encodeFilename(filename))