Hi, my flow is using the file node as output, to dump an image i am receiving by socket, so i am working with binary data and Buffer. the node file is configured in overwrite mode, and binary encoding, without appending any \n character, so i would expect that the length of my msg.payload should …

Switching encoding from binary to default gets rid of the issue on the 16 byte test sequence [image] [image]

Hi and welcome What system are you running on - what version of Node-RED etc etc Is the file your trying to write large?

here is the buffer: [66,90,104,57,49,65,89,38,83,89,151,206,141,167,0,0,134,159,128,80,14,127,240,40,0,4,0,190,255,222,106,48,0,184,131,85,63,9,164,201,234,9,144,26,0,25,61,65,128,25,52,208,100,48,67,76,70,140,13,79,68,10,122,153,61,38,67,79,77,77,0,208,19,1,160,2,65,26,200,6,81,210,112,166,89,4,51…

1st thing I've noticed is the filename is a windows format but you said you are running on Linux

I used your buffer and directly injected it into your function node and then compared its output with the actual file and I can see it seems to deviate after the 6th byte - not got a clue at moment as to what is going on! [image] Even cutting the function node out and only sending 16 bytes - its …

Typical! I thought that i'v tried that! Works perfectly!

But it shouldn't do it so it needs further investigation

the mainsystem is on linux. Forgot that i moved to a windowssystem to try it there also.

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Writing an image using file node and a binary buffer

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Petta 22 January 2020 13:55 2

Hi.

I have a similar problem
Recieving data from socket and everything from byte 11 in file is not the same as what comes from stream.

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Writing an image using file node and a binary buffer

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