As I see from documentation, Classify function supports Audio and Pictures as input, video is not supported unfortunately :(

Will it work if I try to use classify for mixed data input like

Classify[{Audio1, {Picture1.1, Picture1.2, Picture1.3}}->"Train arrival", {Audio2, {Picture2.1, Picture2.2, Picture2.3, Picture2.4}}->"Plane arrival"]

especially when pictures array is not the same size. here {Audio1, {Picture1.1, Picture1.2, Picture1.3}} is an extraction from video.

Or my expectation from classify is too high?


When I run my example to classify this data {Audio1, {Picture1.1, Picture1.2, Picture1.3}} I got something like this. looks like mathematica does not recognize it as audio.

enter image description here

I load sample data like this

{Import[NotebookDirectory[] <> 
 Import[NotebookDirectory[] <> 


When I run example from Alexey's answer I got many errors like this

enter image description here

The same happens if I load audio from wav file by import command.

Is it OK and I can ignore these errors or these errors means that my classifier function will not work at all?

UPDATE3: There are 2 option how to fix errors mentioned in UPDATE2.

  1. Sign in with Wolfram ID inside Mathematica
  2. Disconnect Mathematica from internet

1 Answer 1


Yes, it will work.

audio = {AudioGenerator["White", 3], AudioGenerator["Pink", 4]};
images = Table[RandomImage[1, ColorSpace -> "RGB"], {7}];

X = Riffle[audio, TakeList[images, {3, 4}]] // Partition[#, 2] &;
Y = {1, 2};

c = Classify[X -> Y, Method -> "NeuralNetwork"]

enter image description here


enter image description here


enter image description here

  • $\begingroup$ Thanks a lot. when I run my example, it looks different from yours. I put screenshot to the question. looks like mathematica does not recognize it as audio, but get it as NominalVector. Also in your example, second input is nominalsequence, but I was expecting an image. P.S. Я тоже Алексей :) $\endgroup$
    – Zlelik
    Nov 26, 2017 at 9:25
  • 1
    $\begingroup$ @Zlelik Nice to meet you :) 1. Try: Audio /@ Import[NotebookDirectory[] <> "SampleData/Audio_Pics_separated/01/*.wav"]. Additionally you can set feature types Classify[...,FeatureTypes->{"Audio",...}]. 2. I think it's okay that second feature has type NominalSequence because you have variable number of images for each example. $\endgroup$ Nov 26, 2017 at 17:45
  • $\begingroup$ ok, thanks. I will try. $\endgroup$
    – Zlelik
    Nov 27, 2017 at 8:24
  • $\begingroup$ It is strange. If I try like this zzz = { {Audio /@ Import[NotebookDirectory[] <> "SampleData/Audio_Pics_separated/1/*.wav"], Import[NotebookDirectory[] <> "SampleData/Audio_Pics_separated/1/*.jpg"]} -> 1, {Audio /@ Import[NotebookDirectory[] <> "SampleData/Audio_Pics_separated/2/*.wav"], Import[NotebookDirectory[] <> "SampleData/Audio_Pics_separated/2/*.jpg"]} -> 2 } ccc = Classify[zzz] it works without errors but still tells me nominalvector, instead of audio. If I add FeatureTypes -> {"Audio", Automatic} It gives me error $\endgroup$
    – Zlelik
    Nov 30, 2017 at 22:31
  • $\begingroup$ Error text: Classify::mlincfttp: Incompatible variable type (Audio) and variable value ({Audio[RawArray[Integer16,<2,96096>],SignedInteger16,Appearance->Automatic,AudioOutputDevice->Automatic,SampleRate->48000,SoundVolume->1]}). $\endgroup$
    – Zlelik
    Nov 30, 2017 at 22:31

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