# Make screenshots with FFMPEG

**URL:** <https://community.wowza.com/t/make-screenshots-with-ffmpeg/39295>\
**Category:** Wowza Developer Dojo\
**Tags:** wowza-streaming-server-java-api\
**Created:** [June 24, 2013, 9:04pm UTC](https://community.wowza.com/t/make-screenshots-with-ffmpeg/39295 "2013-06-24T21:04:18Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ruben\_docter](https://avatars.discourse-cdn.com/v4/letter/r/7993a0/32.png) [@ruben\_docter](https://community.wowza.com/u/ruben_docter)\
**Post date:** [June 24, 2013, 9:04pm UTC](https://community.wowza.com/t/make-screenshots-with-ffmpeg/39295/1 "2013-06-24T21:04:18Z")

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I am using Wowza with a custom authetication method (mysql).

In my Flashplayer I connect to Wowza using:

nc.connect(‘rtmp://ip:80/app/inst’,userid,somehash);

if connection succeeds I publish a stream:

ns.publish(streamname);

This is working great! Now I want to connect with ffmpeg to this stream to take some screenshots now and then.

I am using the following command:

/usr/local/bin/ffmpeg -y -i “rtmp://ip:80/app/inst/streamname conn=S:userid conn=S:somehash” -frames:v 1 /home/01.png

This gives me the following error:

Unknown connect error (unsupported authentication method?)

[rtmp @ 0x39cdfc0] Server error: Connection failed: Application rejected connection.

I also tried:

/usr/local/bin/ffmpeg -y -i “rtmp://ip:80/app/inst/streamname conn=NS:PARAM1:userid conn=NS:PARAM2:somehash” -frames:v 1 /home/01.png

and also

/usr/local/bin/ffmpeg -y -i “rtmp://ip:80/app/inst/streamname” conn=NS:PARAM1:userid conn=NS:PARAM2:somehash -frames:v 1 /home/01.png

and a lot more other possibilities. What is going wrong? I also added something like live=1 but nothing helps.

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<div class="post-metadata">

**Author:** ![ruben\_docter](https://avatars.discourse-cdn.com/v4/letter/r/7993a0/32.png) [@ruben\_docter](https://community.wowza.com/u/ruben_docter)\
**Post date:** [June 24, 2013, 10:04pm UTC](https://community.wowza.com/t/make-screenshots-with-ffmpeg/39295/2 "2013-06-24T22:04:03Z")

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I solved the connection, but know I need to know how to create a screenshot of it. Connection is made by adding the parameters to the url as a querystring ?userid&loginhash

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**Author:** ![ruben\_docter](https://avatars.discourse-cdn.com/v4/letter/r/7993a0/32.png) [@ruben\_docter](https://community.wowza.com/u/ruben_docter)\
**Post date:** [July 6, 2013, 7:37am UTC](https://community.wowza.com/t/make-screenshots-with-ffmpeg/39295/3 "2013-07-06T07:37:24Z")

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It is beter to make screenshots client side!