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Closed 10 years ago.
In one o f my projects using ASP.NET + C# I want to be able to dynamically create 30 seconds clip of MP3 files and add a fade in/out.
What library would you recommend?
I saw there are a lot, including:
http://www.alvas.net/alvas.audio.aspx
http://www.audiosoundeditor.com/
http://www.mitov.com/html/audiolab.html
Have you ever had to deal this? What library worked the best for you?
Anything will help including free/priced software that I could call from my C# application or any kind of C# compatible library.
I ended up using ffmpeg
You could try NAudio - There would be a bit of programming required to do this but basically it would be along the lines of using NAudio to decode the MP3 first. Then passing the wave file to fade in (turn up the volume) at the time required and fade out (turn down the volume) when required. If your going to pass this to a client in a format other than wave you would then need to re-encode this file.
There is a better option, that would be the BASS Library. http://un4seen.com/bass.html it has a dedicated forum and does DSP like fade/compressor/EQ, etc. Plus you can read a bunch of different audio formats. It has C# and vb.net support.
You can use winmm.dll library.
Related
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Closed 9 years ago.
I am trying to put together a solution for our office to map the cubicle and office layout. We currently have both php and C# applications, so the solution can be built in either. We have something in PHP already, that allows us to move people from one cubicle to another, but it is based off a static image size and point coordinates. For example, cubicle one is at (3px, 4px). While this solution is working, it doesn't allow for the image size to change, or for the image to change at all without significant coding to realign all of the points on the image. Is there a better solution that can be used or an open source library that would be helpful? A coworked suggested that the Google Maps API might be helpful, or Leaflet.js. However, these both use geocoding, so unless our current Lat and Long is accurate to like a foot, I don't see how these could help.
Thanks for any suggestions.
Update
Here is an image similar to the one we are using. We add absolutely positioned clickable divs over the image to show who sits there.
What your co-worker suggested is not so much the GMaps API itself but the implementations of rotations/geosync translation/zoom algorithms that would allow you to flip an image and all the points related to the image.
No specific code implementation, so I can't be more specific.
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Closed 9 years ago.
WHAT I'M AFTER
I've been exploring the best ways to do this, but seem to keep running into hiccups when trying to playback video and then grab the frame with an alpha channel (ARGB) to then be further manipulated.
I've gotten everything to work with AForge to then find out that the Alpha gets stripped out during the process. I considered OpenCV, but the Emgu CV has a different license that I can't use and I can't verify that OpenCV can read Alpha channels as well.
I looked into FFMPEG .NET wrappers, but haven't found any that are out of their alpha phase or have a license I can use them with (since this could be used for commercial purposes and can't be open sourced)
So I'm looking for a library that is preferably C# or C++ that can play a .MOV or .AVI while preserving it's alpha channel when I make it into a Bitmap.
SUMMARY [TL;DR]
I'm looking for library / sample code
Written preferably in C#, C++ as a fallback. Hopefully easy enough to use.
Can playback AVI and MOV files
Will preserve the alpha channel
Will allow me to access each frame's ARGB values directly
Preferably something that uses the FFMPEG library since it's able to read most formats I need
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Closed 10 years ago.
I need to transcode video streams using C#. The streams come in a variety of formats, like MP4, H264, H263, VP8. Is there any library for c# that can transcode a MemoryStream?
There is a ffmpeg-sharp library
ffmpeg-sharp is a wrapper library over the FFmpeg multimedia suite
that provides easy to use wrappers for use in CIL products under both
Mono and .NET
Also look at SharpFFmpeg
SharpFFmpeg is a C# binding of ffmpeg. The goal of SharpFFmpeg is to
provide the facility that allows .NET developers to easily create
audio and video applications.
And MeWiG - MEncoder GUI for Windows
MeWiG is a Windows Frontend to the MEncoder (part of MPlayer) using
the .NET Framework.You should be able to crop, scale, deinterlace, etc
and finally convert almost any digital video-source, without the need
for commandline-options.
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Closed 10 years ago.
I was wondering whether anyone knew of a good tutorial for Capturing an Image/Video stream from a web camera using C#?
Any suggestion would be a appreciated.
Thanks.
Here's a tutorial for EMGU Camera capture in 7 lines of code.
Setup of the EMGU library is fairly easy to do, and the capturing of the camera is truly that easy.
EmguCV is a good wrapper around the OpenCV API. There's a number of tutorials in the link.
i use AForge.NET.. Look at this sample
Try Microsoft Expression Encoder
Sample project for recording from a live source:
http://msdn.microsoft.com/en-us/library/ff724701(v=Expression.40).aspx
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Closed 10 years ago.
Need to do a remote image capture from a "prosumer" camera into a C#/.NET app (for capturing pics at a higher resolution and more control than a webcam).
Any advantage for Canon vs. Nikon remote capture SDK's? Is one better supported than another? Looking for a developer perspective before embarking on this one...
I looked at both SDK's when I was picking out cameras. I ended up going with the Canon EOS 50D and their EDSDK. Canon has a wrapper class in their code with all the P/Invoke ready for you to use. That was the primary reason I used it. Some of the P/Invoke types are a little odd. I had issues with figuring out some object reference types needed to be casted to some internal structures... Lot's of trial and error. Eventually I got it to work, and it works well. I have live image capture and static image capture working for it.
I'm sorry I cannot speak for Nikon's SDK. I just chose Canon's because the P/Invoke was already there. The downside to EDSDK is it only works with the EOS line.
Here is some more information.