JAI ImageIO-core comes with a set of native codecs. The codecs come bundled in a set of .so and .dll files. Mainly clib_jiio.dll clib_jiio_sse2.dll clib_jiio_util.dll. I was able to find the source to mediaLib (mlib) but not the source for these codecs. Anyone know where the source resides? or if they are simply not open source?
It's not open source. Read the codecLib licence for more information.
(However, caveat emptor: my answer is based on the best of my knowledge, and not on any inside information. I have no relation to jai-imageio-core nor codecLib.)
Similar to
JAI and ImageIO for 64 bit Windows
Not open source and not plans to be and/or evolve.
Related
I want to write code in java to extract the images in a mp4 file. Kindly guide me how to go about it. I am totally clueless.
Java SE has Java Media Framework (JMF) but it provides support for only a few video formats, not including MPEG-4.
Of course, you have some third-party choices to achieve your goal. One of them is Jffmpeg. It is an extension to JMF which contains support for MPEG-4.
Xuggler is another good choice with GPL/LGPL license. It works on Windows, Mac OS X and Linux.
Xuggler is an open-source third party library you can use to do this. Read through the API's. and sample code.
I'm learning java nio, and found the implementation classes are under sun.nio, which seems not provide sources in the jdk1.6/src.zip.
Is there packages open source? And where to find the sources of them?
You can download the java code and native code which implements java.nio at http://download.java.net/openjdk/jdk7/ (see top_dir/j2se/src/share/classes/java/nio/ after extracting the source zip)
Please note that you will be able to see the platform dependent code like the code for Solaris, Linux and Windows as well in this.
It's available under the Community Source Licence somewhere, but you would he better off getting to know the Berkeley Sockets API on which it is based.
I have a couple of questions. I'm trying to install Java JAI libraries on my Eclipse on a PC so that I can create a standalone desktop application to convert TIFF files to JPEGs. I've searched and found links about how to do it but half are broken or very old and I'm not sure which one is the latest. Oracle site is no help and has links to download pages that don't exist. Any help is much appreciated.
Second question I have is will this libary work on a Mac and if so how do I install it there so that my code would work on a Mac.
Thank you!
JAI is native (written in c or c++). That means that you have to take care on which platform your application is running, is it 32bit or 64bit, etc. for each platform you need separate JAI library.
Check if java's javax.imageio.ImageIO utility supports tiff. If it does, you can simply read your tiff, then save it as jpeg. ... again i am not sure if this will work, but it is worth trying
I need an OpenSource API in Java, which can encode *.wav and *.au formats to MP3 and vice-versa.
I have evaluated Java Sound API and LameOnJ, but they do not meet my requirements and are not stable, respectively. Please suggest one that is free and platform independent.
There may not be an adequate answer for you, yet, as the MP3 format requires the authors of decoder/encoders to obtain a license from the Fraunhofer Institute.
I think the the LAME library is distributed from a country that does not respect these IP issues, but it took a considerably amount of legal hackery to get this far.
For any other libraries - for example one written in Java, the authors need to get a similar license. Where cost is an issue - e.g. in an Open Source project, then this is enough of a disincentive to starting.
For more details see this wikipedia article.
If LAME4J is not stable enough for you, then I'm afraid your options are probably:
wait for Sun to license the format for the core JRE. This, I believe they have done recently, but I don't know of any release dates (perhaps to do with JavaFX)
implement your own in Java, and pay the license. I wouldn't fancy this one, either.
write your own Java wrapper to LAME, via JNA, or SWIG
contribute to Lame4J.
pick another format. OGG and FLAC are quite good, and relatively well supported.
Is has been some time, but Oracle/Sun has released MP3 support for JMF. This can be downloaded from the following url:
http://www.oracle.com/technetwork/java/javase/tech/index-jsp-140239.html
Adding it to the classpath will enable playback via the AudioSystem api.
The LAME4J uses the free but time-limited license and the unlimited license will cost you some money.
I've found the Lamejb library on the SourceForge, which requires only the lame binaries and works well without any additional licensing.
Use the Process API to invoke SoX
SoX comes with source or as precompiled binaries for Windows and Mac.
If you are searching a pure java version of lame, check out these sources:
http://jsidplay2.cvs.sourceforge.net/viewvc/jsidplay2/jump3r/
The Jave2 project is Java library that wraps FFMPEG and provides most of its functionality* through a rather useful Java API.
Pros:
Useful Java API that is powerful and rather simple.
FFMPEG binary is bundled in, so you don't have to manage an FFMPEG installation on your system.
Cons:
Does not support streaming data: you have to work through temporary files: every conversion starts by storing all the content in some files on the system, getting FFMPEG to create new files for you, then reading them. This is not a deficiency in FFMPEG, more of a problem in Java where it is very hard to stream data to external processes**.
*) specifically around format conversion - the filter functionality is mostly not represented.
**) In Java, launching a process and connecting to its standard output and input is possible but not comfortable, and using named pipes (the BKM for piping AV to/from FFMPEG) is almost impossible, and even if you do manage to do that, Jave2 doesn't play well with that. I have a set of tools to workaround these problems, based on JNA, if anyone is intersted - I can share.
I want to generate a thumbnail preview of videos in Java. I'm mostly JMF and video manipulation alienated.
Is there an easy way to do it?
What about codecs? Will I have to deal with it?
Any video type is suported? (including Quicktime)
Well, since you're not stuck with JMF, have you considered Xuggler? Xuggler is a Java API that uses FFmpeg under the covers to do all video decoding and encoding. It's free and LGPL licensed.
In fact, we have a tutorial that shows How to Make Thumbnails of an Existing File
There seems to be a few examples out there that are far better than what I was going to send you.
See http://krishnabhargav.blogspot.com/2008/02/processing-videos-in-java.html.
I'd agree with Stu, however. If you can find a way to get what you want using some command-line tools (and run them using Commons-Exec), you might have a better overall solution than depending on what is essentially the Sanskrit of Java extensions.
Are you sure that JMF is right for you? Unfortunately, it is not in particularly good shape. Unless you are already committed to JMF, you very well may want to investigate alternatives. Wikipedia has a decent overview at en.wikipedia.org/wiki/Java_Media_Framework
Many JMF developers have complained that it supports few codecs and formats in modern use. Its all-Java version, for example, cannot play MPEG-2, MPEG-4, Windows Media, RealMedia, most QuickTime movies, Flash content newer than Flash 2, and needs a plug-in to play the ubiquitous MP3 format. While the performance packs offer the ability to use the native platform's media library, they're only offered for Linux, Solaris and Windows. Furthermore, Windows-based JMF developers can unwittingly think JMF provides support for more formats than it does, and be surprised when their application is unable to play those formats on other platforms.
Another knock against JMF is Sun's seeming abandonment of it. The API has not been touched since 1999, and the last news item on JMF's home page was posted in November 2004.
While JMF is built for extensibility, there are few such third-party extensions.
Furthermore, editing functionality in JMF is effectively non-existent, which makes a wide range of potential applications impractical.
My own server-side app shells out to FFmpeg to do the encoding. I'm 98.42% sure FFmpeg does snapshots, too. (It is an all singing, all dancing beast of a program. The command line options alone could fill a book.)
Check it out: ffmpeg.mplayerhq.hu
There is a relatively newer option called JThumbnailer that you find here: https://github.com/makbn/JThumbnail
JThumbnail is a Java library for creating Thumbnails of common types
of file including .doc, .docx, .pdf , .mp4 and etc. full list