Add new feature: option to choose temp folder

youtube_dl/YoutubeDL.py

@@ -631,7 +631,7 @@ class YoutubeDL(object):
         except UnicodeEncodeError:
             self.to_screen('[download] The file has already been downloaded')
 
-    def prepare_filename(self, info_dict):
+    def prepare_filename(self, info_dict, temp=False):
         """Generate the output filename."""
         try:
             template_dict = dict(info_dict)
@@ -710,6 +710,9 @@ class YoutubeDL(object):
             # title "Hello $PATH", we don't want `$PATH` to be expanded.
             filename = expand_path(outtmpl).replace(sep, '') % template_dict
 
+            if temp and self.params.get("tempdir", None) is not None:
+                filename = os.path.join(self.params["tempdir"], os.path.basename(filename))
+
             # Temporary fix for #4787
             # 'Treat' all problem characters by passing filename through preferredencoding
             # to workaround encoding issues with subprocess on python2 @ Windows
@@ -1912,7 +1915,7 @@ class YoutubeDL(object):
                             new_info = dict(info_dict)
                             new_info.update(f)
                             fname = prepend_extension(
-                                self.prepare_filename(new_info),
+                                self.prepare_filename(new_info, temp=True),
                                 'f%s' % f['format_id'], new_info['ext'])
                             if not ensure_dir_exists(fname):
                                 return

youtube_dl/__init__.py

@@ -392,6 +392,7 @@ def _real_main(argv=None):
         'max_views': opts.max_views,
         'daterange': date,
         'cachedir': opts.cachedir,
+        'tempdir': opts.tempdir,
         'youtube_print_sig_code': opts.youtube_print_sig_code,
         'age_limit': opts.age_limit,
         'download_archive': download_archive_fn,

youtube_dl/options.py

@@ -756,6 +756,9 @@ def parseOpts(overrideArguments=None):
     filesystem.add_option(
         '--cache-dir', dest='cachedir', default=None, metavar='DIR',
         help='Location in the filesystem where youtube-dl can store some downloaded information permanently. By default $XDG_CACHE_HOME/youtube-dl or ~/.cache/youtube-dl . At the moment, only YouTube player files (for videos with obfuscated signatures) are cached, but that may change.')
+    filesystem.add_option(
+        '--temp-dir', dest='tempdir', default=None, metavar='DIR',
+        help='Directory where youtube-dl can store some temporary files.')
     filesystem.add_option(
         '--no-cache-dir', action='store_const', const=False, dest='cachedir',
         help='Disable filesystem caching')