Here’s a quick and dirty way to grab a thumbnail from a Wowza application:
rtmpdump -v -B 0.01 -r rtmp://wowza.server/application/stream -o temp.flv ffmpeg -i temp.flv -vframes 1 -s qvga /var/www/frame.jpg
There’s also a way to do it with a Wowza module, but it’s considerably more complex and not for the faint of Java.
Caveat: This likely won’t work if you have hotlink denial turned on on your stream.
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