From 60075f8726853c1fb3e045c241472cc6963be8fc Mon Sep 17 00:00:00 2001
From: Daniel Wykerd <danielwykerd@gmail.com>
Date: Thu, 16 Jun 2022 13:06:10 +0200
Subject: [PATCH] fix: chooseFormat filtering improvements

---
 lib/parser/youtube/VideoInfo.js | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/parser/youtube/VideoInfo.js b/lib/parser/youtube/VideoInfo.js
index e26a9be8..bfc458c8 100644
--- a/lib/parser/youtube/VideoInfo.js
+++ b/lib/parser/youtube/VideoInfo.js
@@ -285,9 +285,16 @@ class VideoInfo {
       });
     }
 
-    if (is_best)
+    if (is_best && requires_video)
       candidates = candidates.filter(format => format.width === best_width);
     
+    if (requires_audio && !requires_video) {
+      const audio_only = candidates.filter(format => !format.has_video);
+      if (audio_only.length > 0) {
+        candidates = audio_only;
+      }
+    }
+
     if (use_most_efficient)
       // sort by bitrate (lower is better)
       candidates.sort((a, b) => a.bitrate - b.bitrate);
@@ -303,7 +310,7 @@ class VideoInfo {
    * @param {object} options - download options.
    * @param {string} [options.quality] - video quality; 360p, 720p, 1080p, etc... also accepts 'best' and 'bestefficiency'.
    * @param {string} [options.type] - download type, can be: video, audio or videoandaudio
-   * @param {string} [options.format] - file format
+   * @param {string} [options.format] - file format, use 'any' to download any format.
    * @param {object} [options.range] - download range, indicates which bytes should be downloaded.
    * @param {number} options.range.start - the beginning of the range.
    * @param {number} options.range.end - the end of the range.