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I want to write a video encoding. What do I need to do?
Use ffmpeg, then just call the executable from your code.
Do you mean implement / invent a codec, or do you mean encode a video?
For encoding a video, use libavcodec from ffmpeg.
For implementing or developing a new codec, this is typically done over a series of years by a team of experts, and if you have to ask this general a question it may be a learning experience but would most likely be a waste of your time.
Use OpenCV. it has an easy to use wrapper around one of the native API's in windows for doing this and also around ffmpeg.
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My adviser told me to use Accord Framework for C# to extract features and patterns from images. Our project is about image analysis and comparison of tobacco leaves. Does anyone here have an idea on how to do it? Thank you.
This is pretty high level stuff, but from what I've learned in my time faffing with it, I'd use the Accord.Imaging library to scan your pictures. Followed by using the Accord.Neuro namespace to "learn" from some manual data you feed into it.
Seems your goal is to create a program that scans images quickly, gleaning only the useful data from the full image, and then checking for some particular features of the image. I've never used the library, but it looks like it'd be possible to use it.
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I am learning C# and I want to create a countdown timer application that displays the time in a digital format on an image of a stopwatch and gives verbal time updates at certain times.
How do I go about displaying images to the screen and playing sound? I have used pygame in python to achieve this so basically I am looking for suggestions for something similar in C#.
I hope this makes sense! Thanks.
The best technology to use for that would probably be Windows Presentation Foundation (WPF).
Here's an example of an application made in WPF similar to what you want to do:
http://www.codeproject.com/Articles/20048/Immerse-Yourself-in-WPF-A-quot-World-Clocks-quot-A
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Is there a way to read text(numbers and letters) in an image using C# ? Is this possible and What is the best way to do this ?
Thanks!
http://code.google.com/p/tesseract-ocr/ has some wrapper to use it in .NET, or, simpler:
http://www.codeproject.com/KB/office/modi.aspx but you need to keep an eye to the license since it is a part of the Office suite. In both case you tipically need some pre processing for the image and, as a solution I did in the past, some post processors that using some ehuristict correct the mistaked words.
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I'm trying to create a C# application which allows me to extract just the audio from YouTube videos. I've come across sites that already do that, but I'm not sure how they actually work. What would be the best way to do this programmatically?
Thanks for any advice
Writing an application for this might be overkill. Existing tools already do a pretty good job, and it's hard to beat their simplicity:
wget http://www.youtube.com/get_video.php?video_id=... |
ffmpeg -i - audio.mp3
All done!
If your application needs to do something special with the audio afterwards, it would make sense to write an app for that part. But for just getting the audio out, shelling out to ffmpeg will be a lot easier.
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are there any tutorials out there on how to create a sandbox using C#?
I would like to personalize my own one, thanks
Study up on using AppDomains. Here's some code examples.
We just recently used the MonoSandbox for Security reasons.
I don't know if it works with standard Microsoft's CLR, or if it is specific to the Mono implementation, but I think it works better than just a custom sanbdbox using AppDomains, and since the source code is open you can probably find a way to make it work for you.
The best documentation I have found for the MonoSandbox is here: http://www.mono-project.com/MonoSandbox
I would start by looking at Code Access Security.