How to convert thro objective-C the MPEG1 to MPEG4? Is there any application that does, so that i can add to my app and test?
Thanks.
Ugh.
You could use mencoder to do it, but I don't suggest it. MPEG-1 is very different from MPEG-4. There's nothing that even approaches a good way to convert without taking a significant quality hit in the transcode.
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basically the title says it all. I'm working on a model that needs (there is no way around it) to load data from a website, parse it and pass it onto another block. I thought I could use an S-Function written in C++, which didn't properly work, then I tried to use webread()
which also didn't work in Simulink because I can't use extrinsic functions on the device this will run on.
I thought I could work around it by downloading the file externally and then reading it through fscanfbut it turned out that Matlab CODER doesn't support that as well.
After putting 2 1/2 days into this now, I'm asking myself whether it is even possible to do something like an HTTP Request through a Simulink block. That's why I went here to ask that question. Thanks for every answer!
I figured out a way to do it with a C++ S-Function by now.
I also created a GitHub Repo for it. If you're stuck with the same problem as I was, try to take a look at this. I'm pretty sure it will help you.
I am new to iOS development and apologies for a basic question. I am trying to convert an image to grayscaled and threshold it using openCV in iOS. So far, I have imported and setup the framework on xcode. What I am trying to do now is to implement the following features:
http://www.youtube.com/watch?feature=player_embedded&v=Ko3K_xdhJ1I
at 0:24 and 0:53
I tried to follow the tutorial which points to the above youtube video :
http://docs.opencv.org/doc/tutorials/ios/image_manipulation/image_manipulation.html
and wasn't sure where to paste the above code and in which file?
Many thanks.
Kind Regards.
These are helper methods and best written in a separate file. Quite simply,
http://answers.oreilly.com/topic/631-how-to-get-c-and-objective-c-to-play-nicely-in-xcode/
Put all that image manipulation code in say ImageManipulationHelper.mm and create a header file for the same
Create a nice little category for UIImage.
http://developer.apple.com/library/mac/#documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/CustomizingExistingClasses/CustomizingExistingClasses.html
which can call these methods in turn to create any image manipulation you might want.
Easy does it. And yeah, read up a bit more on using C++ in objectiveC, if you get into trouble and also about categories. They are some of the niftier features of objectivec
I achieved the same,using the help of this awesome link
Let me know if you need any further help.
Cheers!!
Edit :
Check this out ImageFiltering
I have a fairly straightforward setup in which a RemoteIO unit is taking input, doing a bit of processing, sending it out the output, and writing the output to a file. Right now, I'm just generating test signals inside of my RemoteIO render callback, so I don't really care about anything coming from the 'actual' input. My render callback is called and works a treat in the simulator, but is never called at all when run on the phone. Any ideas where I should start looking? Am happy to post code--just not sure what everyone would like to see...
I knew that things had worked in the past, so I started digging through the repo. Foolishly, I had changed the kAudioSessionProperty_AudioCategory of my AudioSession from kAudioSessionCategory_PlayAndRecord to kAudioSessionCategory_RecordAudio and forgotten to change it back. Hope this helps someone else avoid the same stupid mistake...
Just an hour ago I was solving the same. The problem was that I had defined AudioUnit type variable in the header file, so after I used AudioComponentInstance instead of AudioUnit it started to work on my devices as well.
So possibly could be this.
i was wondering about where Zends functionality comes from when inside of a controller i call
$this->getRequest()->isPost()
It works, but i do not find where this "isPost()" function comes from.
I just noticed it because i don't have intellisense for that.
Question is:
Is this merely some fallback function that "newbie users" use apart from a better alternative?
Or is it perfectly valid using it?
Thanks :)
It is the official way to go, you can use it. Check the source code of Zend_Controller_Request_Http::isPost() to see what it really is doing, if you'd like :)
I found Yoshimasa Niwa's article about blob detection here:
http://niw.at/articles/2009/03/14/using-opencv-on-iphone/en
And something on realtime face detection here:
http://www.morethantechnical.com/2009/08/09/near-realtime-face-detection-on-the-iphone-w-opencv-port-wcodevideo/
But what I really want to do is realtime blob detection (like http://www.youtube.com/watch?v=LIgsVoCXTXM) using the iPhone 4 camera.
I can find the headers for CvBlobDetector in cvvidsurv.hpp. But trying to use that without modification is not the right thing to do.
How do I get CvBlobDetector to work? Or is there an alternate solution?
Make sure you've followed the instructions to use it properly:
http://opencv.willowgarage.com/wiki/cvBlobsLib
One of the alternative solutions i used and it works good is:
http://code.google.com/p/cvblob/