fix timeout with some cameras by decreasing interval between keepalives (#265)

(https://github.com/aler9/mediamtx/issues/1403)

README.md

@@ -45,7 +45,7 @@ Features:
   * Parse RTSP elements
   * Encode/decode format-specific frames into/from RTP packets. The following formats are supported:
     * Video: H264, H265, M-JPEG, VP8, VP9
-    * Audio: G711 (PCMA, PCMU), G722, LPCM, MPEG-2 Audio (MP3), MPEG-4 Audio (AAC), Opus
+    * Audio: G711 (PCMA, PCMU), G722, LPCM, MPEG-2 audio (MP3), MPEG-4 audio (AAC), Opus
 
 ## Table of contents
 

client.go

@@ -361,7 +361,8 @@ func (c *Client) Start(scheme string, host string) error {
 		c.senderReportPeriod = 10 * time.Second
 	}
 	if c.udpReceiverReportPeriod == 0 {
-		c.udpReceiverReportPeriod = 10 * time.Second
+		// some cameras require a maximum of 5secs between keepalives
+		c.udpReceiverReportPeriod = 5 * time.Second
 	}
 	if c.checkStreamPeriod == 0 {
 		c.checkStreamPeriod = 1 * time.Second