I want to access Image sequence contained in a Heic Container using C#.
In windows 10, the HEIF Image Extensions enables reading (HEIF) files. It is supposed to be extended to WIC to be used by developers if the previously mentioned extension is installed on the device.
Other libraries I found about this topic:
- Magick.NET Can only handle a Single image in a HEIC Container.
- HEIF-Utility-Native-DLL and HEIF.NET Have the same issue as the one before.
- libheif is a C++ Library. I don't know how to use PInvoke even tho i have been trying extensively to understand how it works (I cant read C++)
How can I use my code to check if the extension is Installed?
How can I use C# to access Image sequence from a HEIC container?
And how can I do the reverce by packing Image sequences into a Heic Container?
As an alternative, how could I port this JavaScript to C#, or use it with C# in a project to access Images?
Related
recently i have started workin on project of my own which is capturing a camera output using DirectShow .Net. There are few problems that i don't know how ot solve
1) How can i encode the captured stream into H.264 format.I understand i should some how add filter in the filter graph. But i wasn't able to find where and how . Also i was not able to find if there is standart H.264 filter or should i download it form some where? If i need to download it can it just be a dll to wich i add reference or should it be installer?
2) Is there a way to save the captured output into a memory object, some kind of stream or it can only be written to file?
Best Regards,
Iordan
You're can use commercial software from VisioForge or Viscomsoft.
AForge potencial problem - no audio during capture, only video. Also output formats is a very limited. But - it's free and open source, if you're have any DirectShow experiense you can add audio support.
You will need to use something like FFMpeg or Handbrake. Check out http://vidcoder.codeplex.com/.
AForge also has some video editing abilities and you can also pass filters to it. There are also several FFMpeg C# wrappers you could use such as https://github.com/crazyender/FFMPEG.net
You should use AForge.net. All of the hard work is done for you already. Use VideoFileWriter http://www.aforgenet.com/framework/docs/html/4ee1742c-44d3-b250-d6aa-90cd2d606611.htm. I appears that the AForge framework uses FFMpeg under the hood as well (See AForge.Video.FFMPEG namespace). You just create a writer and pass it the bitmap/frame writer.WriteVideoFrame(bitmap);
You should fully investigate the video abstractions in AForge. You could save yourself considerable amounts of time.
Example: http://www.aforgenet.com/framework/samples/video.html
1) Yes, You should download encoder filter library. Most of decoders are supplied with free. But encoder is not. If you don't want to pay, you have to find open source Encoder.
And To use at the graphedit program, you should do dll register with that dll file. Or the installer program do this instead. And you also need to check container type like mp4, mkv... In other words you need mux filter to save that in a file. I think someone will link available urls. Sorry I don't have urls now.
2)What is that the means of capture? Is that Movie? or Image?
In case of Image, There are many sample projects and SampleGrabbers. You can save it to both of a file and memory.
In case of Movie, I'm sure your pc memory is not enougth to them with out encoding. Make memory stream and pass it to capture manager.
You can also make a filter in order to customize filter to your needs. All of information are included in Windows SDK samples.
Is it possible to rewrite examples from XML/YAML Persistence page from OpenCV to EmguCV?
I mean code in first two subchapters: "XML/YAML file storages. Writing to a file storage" and "Reading data from a file storage."
I am mostly interested in saving and loading int-s and sequences.
I have found EmguCV cvOpenFileStorage doc - most arguments are IntPtrs and it is not clear for me how to use it for mentioned types (concerning matrices - I have found working examples).
Emgu does not support completely the OpenCV functions related to FileStorage operations: you must wrap the missing methods using Interop (System.Runtime.InteropServices).
At the following link you can find a code example: http://www.emgu.com/forum/viewtopic.php?f=7&t=1877
I have a list of Bitmaps, how can I convert it to avi file using c#.net. Or how can we convert a set of images to video file ?
I do not need AVI to "Set of images", but I need "Set of Images" to AVI.
i used avifile wrapper in the past, work nicely
I think you need to use third party libraries
There is AVI File Wrapper or you can use ffmpeg in .NET.
Old question, but I have two tips to achieve it. We're now 2013, but all answers are good from 2004 to 2013. These answers are useful as it seems programmers rarely take the time to work on new encoders solution, and we often rely on the same old DLL and wrappers.
Images to MPEG-1
Based on this code, http://www.codeproject.com/Articles/5834/A-C-MPEG1-Image-Compression-Class, you can write a C# Images to MPEG-1 class compatible on any platform using C#.
Images to AVI
Convert just an image with 24 bits color (try to use a gradient generator to have the maximum number of colors) to a full frame AVI using ffmpeg. Take an hexadecimal editor, check how the header of the AVI is, and how the single image has been placed in the AVI. Now do it with two images. Check the header. Refer to the specification to know which value use in the header. You'll see you can easily build a Images to AVI from scratch without any wrapper, and use it on any platform.
Both are codes from scratch.
You can check out a simple library for writing AVI files that I've coded to use in my projects.
https://sharpavi.codeplex.com/
The sources include a sample screencast app which can be easily adapted to get the bitmaps from files if you need it.
I need to create a program that reads tif files from a directory and then trims the bottom inch of the file and resaves the file. I know how to open the files but how would I automate this process from c#?
If you need to handle TIFF images in C# then have a look at LibTIFF.Net
http://bitmiracle.com/libtiff/ - It is open source and Native .NET component and free for commercial use.
This library should also have the TIFF cropping functions you need. I am not sure if the native .NET libraries can handle all of the TIFF functions you may require whereas LibTIFF will.
The original LibTIFF for C/C++ can be found at http://www.remotesensing.org/libtiff/ which may help you with documentation and support if needed.
Included with libTiff is a program called tiffCrop which should also have source code. http://www.remotesensing.org/libtiff/man/tiffcrop.1.html which can be accessed via
http://www.remotesensing.org/libtiff/tools.html.
See here.
Is it possible to load and display EPS file using plain WinForms GDI+? If not, is there a free library to help out?
I seem to remember that Windows GDI supported EPS files, but after Googling around a bit, I am starting to doubt that memory.
All I want to do is load the file and draw it using a Graphics context.
I am aware that I can just use any program to convert the file to PNG or something and render it that way, but because I am trying to render at multiple resolutions, I would prefer to keep the vector data in the EPS file.
Thanks!
All the free or open source libraries I know that can convert EPS to other vector or raster format are all based on Ghostscript. You can invoke ghostscript directly, with wrapper provided or alternatively look at imagemagick. It is a very popular library for manipulating image graphics and has been around for a long time. It also internally relies on Ghostscript for handling EPS format. There is a .NET wrapper for it that you can find at http://imagemagick.codeplex.com/. You can read a bit about its background here too http://www.codeproject.com/KB/dotnet/ImageMagick_in_VBNET.aspx. There is also pstoedit that is also based on ghostscript to read EPS and allow export to format like WMF. You will need to the call to pstoedit API using interop in .NET
Besides Ghostscript there are several commercial products that I known of like ImageGear and LeadTools which will let you take EPS to almost any other kind of graphic formats.
You can use GhostScript to produce images from an EPS. Once you have an image you can then display that within your application.
In your question you indicated you want the output in a vector format which would preclude bitmaps, jpeg etc. Here are a couple of ways of getting a XAML file which is a vector file with extensive support by Microsoft.
Microsoft Expression Blend 3 and Design 3 can both open .ai (eps) files and convert them to vector formats, design and XAML respectively, so it is definitely possible.
I know it is relatively easy to automate most Microsoft Office applications like Word and Excel, but I have not seen any documented com inter-op assemblies for these Expression products.
Perhaps you can use the converters that are part of Expression in an undocumented way?
If that doesn't work here is plan B:
Here is a free converter that will convert .ai (eps) files to XAML. To use it you need Adobe Illustrator however.