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How can one recognize a digital audio interface name /vendor (USB digital audio)?
Hi Ning, The function audiodevinfo does list the device names. Can you confirm that you are able to use these devices out...

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i have created an executable file using deploytool but this tool doesn't support some functions, it's showing error using==> imaqdevice.preview. preview(OBJ) is not permitted in deployed mode. please help me to get preview for my video input.
Mahesh, I do not believe that imaqtool is deployable. You probably would have to write your own. You can search on MATLAB fil...

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Why standard Waveform from audio out gets distorted when i reduce the amplitude?
Shyam, The reason for this distortion is that some of the signal values are being clipped. When you specify [a, b], it is ass...

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Compare 2 audio files - with a twist
You are attempting to check whether two audio recordings are the same without allowing access to the audio data for any kind of ...

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How to save a video created by 'VideoWriter' to specific file other than current file folder
Provide the full path to the location you want to save the file to when creating VideoWriter. On Windows for example: vwObj...

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i want to find and hear the frequency responce of a .wav file using following equation y(n)=y(n-1)-0.9*y(n-2)+x(n)+x(n-1) but still its giving error and sound after applying freq responce is not audible.my code is following
Hi Lione, It would be good if you can post the error that you are getting. From a quick glance, the second call to audioplaye...

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How can I read Intra coded frames from a video?
Zealous, The notion I, P and B frames only applies to an encoded stream. It determines how the frames must be decoded and the...

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how can i compress the video using Run Length Encoding ..?
Pavithra, First of all I am curious to ask why do you want to do this. If you want to save your video data in a compressed fo...

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Problems with Generating Continous(Un Broken) Sound on Matlab
Shyam, I am not sure what you mean by continuous unbroken sound. The audioplayer and sound functions have a limitation that y...

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VideoReader doesn't seem to read videofiles (Ubuntu)
Tobias, I am glad that installing the missing MPEG4 codecs resolved this issue. Dinesh

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Is it possible to use parallel computing with VideoReader?
Nathan, I am getting the following error: |Cannot call READ method after using READFRAME or HASFRAME methods or setting the ...

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How can i import audio from a zip file into matlab to generate the autocorrelation, pitch, and linear prediction
Shikarat, I assume that when you mean "audio data in a ZIP file" you are saying that you have a ZIP file that contains audio ...

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Playing/processing video stream
Hi Olle, It is currently not possible to read a H.264 stream into MATLAB. However, it is possible to read MMS streams using t...

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A résolu

Who Has the Most Change?
You have a matrix for which each row is a person and the columns represent the number of quarters, nickels, dimes, and pennies t...

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Return the 3n+1 sequence for n
A Collatz sequence is the sequence where, for a given number n, the next number in the sequence is either n/2 if the number is e...

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Check if sorted
Check if sorted. Example: Input x = [1 2 0] Output y is 0

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Back and Forth Rows
Given a number n, create an n-by-n matrix in which the integers from 1 to n^2 wind back and forth along the rows as shown in the...

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Most nonzero elements in row
Given the matrix a, return the index r of the row with the most nonzero elements. Assume there will always be exactly one row th...

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Find the numeric mean of the prime numbers in a matrix.
There will always be at least one prime in the matrix. Example: Input in = [ 8 3 5 9 ] Output out is 4...

environ 11 ans il y a

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Remove any row in which a NaN appears
Given the matrix A, return B in which all the rows that have one or more <http://www.mathworks.com/help/techdoc/ref/nan.html NaN...

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Finding Perfect Squares
Given a vector of numbers, return true if one of the numbers is a square of one of the other numbers. Otherwise return false. E...

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Weighted average
Given two lists of numbers, determine the weighted average. Example [1 2 3] and [10 15 20] should result in 33.333...

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Create times-tables
At one time or another, we all had to memorize boring times tables. 5 times 5 is 25. 5 times 6 is 30. 12 times 12 is way more th...

environ 11 ans il y a

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Fibonacci sequence
Calculate the nth Fibonacci number. Given n, return f where f = fib(n) and f(1) = 1, f(2) = 1, f(3) = 2, ... Examples: Inpu...

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Determine whether a vector is monotonically increasing
Return true if the elements of the input vector increase monotonically (i.e. each element is larger than the previous). Return f...

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Pizza!
Given a circular pizza with radius _z_ and thickness _a_, return the pizza's volume. [ _z_ is first input argument.] Non-scor...

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Swap the first and last columns
Flip the outermost columns of matrix A, so that the first column becomes the last and the last column becomes the first. All oth...

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Make a checkerboard matrix
Given an integer n, make an n-by-n matrix made up of alternating ones and zeros as shown below. The a(1,1) should be 1. Example...

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Réponse apportée
Can't get video's number of frames before processing?
Hi Lirian, The vision.VideoFileReader system object allows reading only one frame at a time and does not allow random access....

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how to write a MP4 video using vision toolbox ?
Lirian, I see the confusion. It is common to refer to image dimensions in terms of Width x Height. So a full HD video is said...

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