# TranscoderVideoDecoderNotifyBase + ITranscoderFrameGrabResult

**URL:** <https://community.wowza.com/t/transcodervideodecodernotifybase-itranscoderframegrabresult/46540>\
**Category:** Wowza Developer Dojo\
**Tags:** wowza-streaming-server-java-api\
**Created:** [April 28, 2016, 1:33am UTC](https://community.wowza.com/t/transcodervideodecodernotifybase-itranscoderframegrabresult/46540 "2016-04-28T01:33:34Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Andrey\_Sheremeta](https://avatars.discourse-cdn.com/v4/letter/a/85f322/32.png) [@Andrey\_Sheremeta](https://community.wowza.com/u/Andrey_Sheremeta)\
**Post date:** [April 28, 2016, 1:33am UTC](https://community.wowza.com/t/transcodervideodecodernotifybase-itranscoderframegrabresult/46540/1 "2016-04-28T01:33:34Z")

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Hello,

I use graphic overlays to add logo in transcode strem:

[Add graphic overlays](https://www.wowza.com/docs/how-to-add-graphic-overlays-to-live-streams-with-wowza-transcoder)

and I need to get thumbnail images

[get thumbnail images](https://www.wowza.com/docs/how-to-get-thumbnail-images-from-wowza-transcoder-with-an-http-provider)

I added to onAfterDecodeFrame:

```auto
sourceVideo.grabFrame(new GrabResult(), sourceWidth, sourceHeight);

```

but the picture with a logo

how I can get the pic whithout overlays?

P.S. My final task to change all frame with Transcoder, like - get snipeshot, modify pic, insert with Overlay

Thanks,

worker4web

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<div class="post-metadata">

**Author:** ![Andrey\_Sheremeta](https://avatars.discourse-cdn.com/v4/letter/a/85f322/32.png) [@Andrey\_Sheremeta](https://community.wowza.com/u/Andrey_Sheremeta)\
**Post date:** [April 28, 2016, 2:40pm UTC](https://community.wowza.com/t/transcodervideodecodernotifybase-itranscoderframegrabresult/46540/2 "2016-04-28T14:40:59Z")

</div>

Maybe someone can suggest how to create new thread whith grab images?

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<div class="post-metadata">

**Author:** ![Michelle\_B](https://sea2.discourse-cdn.com/flex002/user_avatar/community.wowza.com/michelle_b/32/394_2.png) [@Michelle\_B](https://community.wowza.com/u/Michelle_B)\
**Post date:** [May 11, 2016, 9:02pm UTC](https://community.wowza.com/t/transcodervideodecodernotifybase-itranscoderframegrabresult/46540/3 "2016-05-11T21:02:36Z")

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Hi,

Have you looked into adding it to onBeforeScaleFrame? Accessing the frame prior to being transcoded was discussed similarly in [another post](http://community.wowza.com/t/-/39605).

Michelle