Add an option to dump json information

README.md

@@ -121,6 +121,7 @@ which means you can modify it, redistribute it or use it however you like.
     --get-description          simulate, quiet but print video description
     --get-filename             simulate, quiet but print output filename
     --get-format               simulate, quiet but print output format
+    -j, --dump-json            simulate, quiet but print json information
     --newline                  output progress bar as new lines
     --no-progress              do not print progress bar
     --console-title            display progress in console titlebar

youtube_dl/YoutubeDL.py

@@ -57,6 +57,7 @@ class YoutubeDL(object):
     forcethumbnail:    Force printing thumbnail URL.
     forcedescription:  Force printing description.
     forcefilename:     Force printing final filename.
+    forcejson:         Force printing json information.
     simulate:          Do not download the video files.
     format:            Video format code.
     format_limit:      Highest quality format to try.
@@ -593,6 +594,8 @@ class YoutubeDL(object):
             compat_print(filename)
         if self.params.get('forceformat', False):
             compat_print(info_dict['format'])
+        if self.params.get('forcejson', False):
+            compat_print(json.dumps(info_dict))
 
         # Do nothing else if in simulate mode
         if self.params.get('simulate', False):

youtube_dl/__init__.py

@@ -304,6 +304,9 @@ def parseOpts(overrideArguments=None):
     verbosity.add_option('--get-format',
             action='store_true', dest='getformat',
             help='simulate, quiet but print output format', default=False)
+    verbosity.add_option('-j', '--dump-json',
+            action='store_true', dest='dumpjson',
+            help='simulate, quiet but print json information', default=False)
     verbosity.add_option('--newline',
             action='store_true', dest='progress_with_newline', help='output progress bar as new lines', default=False)
     verbosity.add_option('--no-progress',
@@ -607,7 +610,7 @@ def _real_main(argv=None):
         'username': opts.username,
         'password': opts.password,
         'videopassword': opts.videopassword,
-        'quiet': (opts.quiet or opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat),
+        'quiet': (opts.quiet or opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat or opts.dumpjson),
         'forceurl': opts.geturl,
         'forcetitle': opts.gettitle,
         'forceid': opts.getid,
@@ -615,8 +618,9 @@ def _real_main(argv=None):
         'forcedescription': opts.getdescription,
         'forcefilename': opts.getfilename,
         'forceformat': opts.getformat,
+        'forcejson': opts.dumpjson,
         'simulate': opts.simulate,
-        'skip_download': (opts.skip_download or opts.simulate or opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat),
+        'skip_download': (opts.skip_download or opts.simulate or opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat or opts.dumpjson),
         'format': opts.format,
         'format_limit': opts.format_limit,
         'listformats': opts.listformats,