From a8d5316aaf3dc740aad486b8c394b2f3e70f5a58 Mon Sep 17 00:00:00 2001
From: gudata <gudata@users.noreply.github.com>
Date: Fri, 19 Aug 2022 23:00:21 +0300
Subject: [PATCH] [infoq] Avoid crash if the page has no `mp3Form`

* proposed fix for issue #31131, aligns with yt-dlp

Co-authored-by: dirkf <fieldhouse@gmx.net>
---
 youtube_dl/extractor/infoq.py | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/infoq.py b/youtube_dl/extractor/infoq.py
index 0a70a1fb4..60b02b699 100644
--- a/youtube_dl/extractor/infoq.py
+++ b/youtube_dl/extractor/infoq.py
@@ -1,6 +1,9 @@
 # coding: utf-8
 
 from __future__ import unicode_literals
+from ..utils import (
+    ExtractorError,
+)
 
 from ..compat import (
     compat_b64decode,
@@ -90,7 +93,11 @@ class InfoQIE(BokeCCBaseIE):
         }]
 
     def _extract_http_audio(self, webpage, video_id):
-        fields = self._form_hidden_inputs('mp3Form', webpage)
+        try:
+            fields = self._form_hidden_inputs('mp3Form', webpage)
+        except ExtractorError:
+            fields = {}
+
         http_audio_url = fields.get('filename')
         if not http_audio_url:
             return []