How to pass a picture to Power Automate (v2)

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Posted on by HenkVlootmN

I use to pass a picture to Power Automate with this code, placed on a OnTimerEnd statement:

ClearCollect(Pic1; {Photo: Camera1_1.Stream; time: Now()});;

ClearCollect(colFaceData1; StarliveFaceAPI_v1.Run("Image1.jpg"; First(Pic1).Photo));;

In the new Power Automate (V2) I tried in several ways to get the picture in Power Automate. I used a text input and I used a File input, but in both ways the body did no pass. The best I got was using this code and a use a text input in the PowerApps(v2)

ClearCollect(Picture; Camera1_1.Stream);;

Set(Pic1Raw;
JSON(First(Picture);JSONFormat.IncludeBinaryData)
);;
Set(Pic1_64;
Mid(Pic1Raw; 24;Len(Pic1Raw) - 24)
);;

StarliveFaceAPI_v1_test.Run(Pic1_64)

I did not get any result back. Can someone tell me

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Building Power Apps

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WarrenBelz 155,074 Most Valuable Professional on at

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Hi @HenkVlootmN ,

Assuming you are setting the file name in the Flow and using base64ToBinary to get the JSON back to a file format, try this

With( { _JSON: With( { _JSONI: JSON( Camera1_1.Stream, JSONFormat.IncludeBinaryData ) }, Mid( _JSONI, Find( ",", _JSONI ) + 1, Len(_JSONI) - Find( ",", _JSONI ) - 1 ) ) }, StarliveFaceAPI_v1_test.Run( _JSON, ) )

However, you should be able to pass the file content directly using Power Apps V2 (although I have never tried a Camera Stream)

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HenkVlootmN 15 on at

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Hi @WarrenBelz ,

Thank you for this nice solution. For other viewers who want to try this script: there is one missing bracket at the end of the script and, since I do not have an extra argument in the .run argument, I deleted the comma.

But although it looks like a good solution it does not returns the any value. I just passed it directly to the HTTP step in Power Automate, since the REST API I trigger accepts a base64 output. This is the error result:

I saw a video of Shane Young PowerApps upload file to SharePoint document library - YouTube and it appears that this solution only works if you use the .image argument. I do not get any results with the .stream and .photo from the camera triger and .image argument does not work.

I never worked with the "WIth" statement in PowerApps, but it looks like a good way to build formula's :-).

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WarrenBelz 155,074 Most Valuable Professional on at

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@HenkVlootmN ,

Bracket corrected (dangers of free-typing Text).

If you set an Image control to the Camera Stream, you should be able to use JSON on that.

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HenkVlootmN 15 on at

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I finaly got it working with this code. Getting the contents in a collection made it work. I'll use a Compose in Power Automate to get the results I want.

ClearCollect(
_JSONTest;
{
Base64String:
JSON(Camera1.Photo; JSONFormat.IncludeBinaryData)
}
)
;;
Set(_JSON;Last(_JSONTest).Base64String)
;;
StarliveFaceAPI_v1_test.Run(_JSON)

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