Using Rtmpdump

Introduction

You can grab RTMP video streams even if you favorite browser plugin can't do that.

Requirements

RTMP streams can be intercepted on a routers only, where it passed from Internet to some local client, so there is no sense to try it on NAS or other device.

Installation

opkg install rtmpdump

Using rtmpdump

I'm successfully grabbed video from some page (endocrinology lecture), where RTMP stream was used as seen on this part of HTML code:

show_pl('videoplayer', 'rtmp://mediasphera-vod.cdn.ngenix.net/vod/mp4:mediasphera/melnichenkogivop.mp4', '590', '332','http://www.1med.tv/player/st/video2-1895.txt','http://mediasphera-vod.cdn.ngenix.net/vod/_definst_/mediasphera/mp4:melnichenkogivop.mp4/playlist.m3u8');

Redirect stream to router itself:

iptables -t nat -A PREROUTING -p tcp --dport 1935 -j REDIRECT

Run rtmpsrv from the folder you want to save a video:

rtmpsrv

and start video playback from web browser. You'll not see any video in web browser because it will be intercepted by router, but you'll see how rtmpsrv will start rtmpdump from console. Don't close it while grabbing in progress. Please, be patient, it may take a long time to finish.

Links

• Real Time Messaging Protocol - https://en.wikipedia.org/wiki/Real_Time_Messaging_Protocol
• RTMPDump project page - https://rtmpdump.mplayerhq.hu/