Merge pull request #7691 from ryandesign/use-PYTHON-env-var

[youtube-dl] / README.md

diff --git a/README.md b/README.md
index b286651cd712933fd4538b88499d9325b25d88e7..df419abe83ce3c8e5d8202ad12991aaefd4c55b9 100644 (file)
--- a/README.md
+++ b/README.md
@@ -319,7 +319,8 @@ which means you can modify it, redistribute it or use it however you like.
     --all-formats                    Download all available video formats
     --prefer-free-formats            Prefer free video formats unless a specific
                                      one is requested
-    -F, --list-formats               List all available formats
+    -F, --list-formats               List all available formats of specified
+                                     videos
     --youtube-skip-dash-manifest     Do not download the DASH manifests and
                                      related data on YouTube videos
     --merge-output-format FORMAT     If a merge is required (e.g.
@@ -534,6 +535,12 @@ Most people asking this question are not aware that youtube-dl now defaults to d
 
 Apparently YouTube requires you to pass a CAPTCHA test if you download too much. We're [considering to provide a way to let you solve the CAPTCHA](https://github.com/rg3/youtube-dl/issues/154), but at the moment, your best course of action is pointing a webbrowser to the youtube URL, solving the CAPTCHA, and restart youtube-dl.
 
+### Do I need any other programs?
+
+youtube-dl works fine on its own on most sites. However, if you want to convert video/audio, you'll need [avconv](https://libav.org/) or [ffmpeg](https://www.ffmpeg.org/). On some sites - most notably YouTube - videos can be retrieved in a higher quality format without sound. youtube-dl will detect whether avconv/ffmpeg is present and automatically pick the best option.
+
+Videos or video formats streamed via RTMP protocol can only be downloaded when [rtmpdump](https://rtmpdump.mplayerhq.hu/) is installed. Downloading MMS and RTSP videos requires either [mplayer](http://mplayerhq.hu/) or [mpv](https://mpv.io/) to be installed.
+
 ### I have downloaded a video but how can I play it?
 
 Once the video is fully downloaded, use any video player, such as [vlc](http://www.videolan.org) or [mplayer](http://www.mplayerhq.hu/).