I'm writing a video recording program, and it's going quite well. I can record mic as well as video from the screen. However, I would also like to be able to obtain sounds from another Java program and then sync them with the video. Basically, record the audio as it is played by the other program.
Is there a way to accomplish this? I'm pretty new with sound, and have read a bit up on it. I think I need to set up a mixer, but I'm not sure if I can actually obtain sound from another Java program that way.
This is not possible with java sound, not because of any particular problem with java sound, but because not all audio APIs that java builds on support this feature. (Core audio on the mac for example, and ASIO on windows. Not sure about ALSA on linux, but I don't think it supports this either).
If you are on windows and want to write JNI/JNA code you can use PortAudio which supports this on one of the audio APIs (sorry I can't recall which one).
Related
I read this code to play video files using xuggler as a library.When i run this code , the video without sound plays.Why is that ?
If not what should i do to play audio with video.?
Quite simply, it's because that code doesn't play any audio. It was never written to do so!
If you want to play audio and video, check out the example here:
http://xuggle.googlecode.com/svn/trunk/java/xuggle-xuggler/src/com/xuggle/xuggler/demos/DecodeAndPlayAudioAndVideo.java
The question to me suggests that you've just grabbed the source without looking at the tutorials - I'd strongly suggest doing so so you can understand the code behind what's going on rather than just throwing it in there and expecting it to work - especially if you're planning on using Xuggler in any great depth!
As a further note, if all you want to do is play videos I probably wouldn't advise using Xuggler because it's just not really designed for that sort of thing. Sure it will play them, but you have to manage all the sync issues yourself (which the above example doesn't do a great job of), it will only use your CPU and therefore really eat into its consumption especially if you're doing things like HD video, and the sheer amount of background code is just overkill (getting the streams, finding the stream IDs, extracting each packet, determining the type of the packet, dealing with it appropriately, managing errors, etc. etc.) It's a great piece of software, but if you're only using it to play stuff then it'll probably give you far more trouble than its worth.
Instead I'd advocate having a play with VLCJ - it's a bit complicated to get set up to work reliably (out of process players are required for rock solid stability) but when you've got that far it plays near any file type under the sun and manages all the issues above for you much, much better than you'll ever cope with by hand!
My guess is that you have a missing audio codec. I've had this same issue but vice versa; the sound played but the video didn't.
I use Java Media Framework.
I did whatever was played mp3, but many of them do not want to play.
Why?
this file not play http://depositfiles.com/files/7py43atpw
If you're use JMF MP3 Plugin properly, all should be fine. Probably you should give us your code sample.
Update:
Also, you could try JavaLayer
This library is full of bugs. And even when you'll manage to play a mp3, try it on mac or unix and you will get a surprise.
I'm trying to record/process some audio from three usb microphones with Java Sound on Snow Leopard (but can switch to Windows if it fixes things). Problem is, when I try to use the mixer that corresponds to the usb mic, Java Sound tells me that the line isn't supported. Specifically, it says this...
Available mixers:
Java Sound Audio Engine
USBMIC Serial# 041270067
Built-in Input Built-in Microphone
Soundflower (2ch)
Soundflower (16ch)
Exception in thread "AWT-EventQueue-0"
java.lang.IllegalArgumentException:
Line unsupported: interface
TargetDataLine supporting format
PCM_SIGNED 96000.0 Hz, 8 bit, stereo,
2 bytes/frame,
...when I ask it to select the USBMIC mixer:
Mixer mixer = AudioSystem.
getMixer(mixerInfo[1]);
I have tried matching the audio format to the exact specifications of the microphones (16-bit, 44100Hz, stereo) and it didn't make any difference.
The problem is cropping up here:
final TargetDataLine line = (TargetDataLine)
mixer.getLine(info);
It would seem that the mixer and the TargetDataLine don't like each other. Is there some way to get these two to 'match' and get along?
The microphones that I'm using are admittedly a bit strange. They were made to be used in a karaoke video game called SingStar. The mics themselves have standard mono line-in connectors that plug into a little hub (two to a hub) that converts them into a single male usb connector. Strangeness aside, though, they seem to work perfectly fine with Audacity as separate channels, so multichannel recording with them is clearly possible, just maybe not in Java.
I've also considered using a program like Soundflower that shares audio between different programs. However, I'm not sure this will work as I can't see how to make the USB mics inputs to Soundflower and then pipe them into a Java. A quick experiment showed me that I could record audio in Audacity from the mics, pipe it out through Soundflower, and then process in my Java program. Still, what I would like to do is have it all happen in real time in Java.
Anybody familiar with this kind of problem?
I think that a simple way to do this would be using Soundflower and Soundflowerbed.
I can't see how to make the USB mics inputs to Soundflower and then pipe them into a Java.
It sounds like you have Soundflower installed already. Soundflowerbed is found in the same disk image as Soundflower and is a menubar application. It lets you route sound between applications which don't have controls built in for selecting sound devices. Install that from the disk image and click it to run.
All of the following will be using my Echo Audiofire 4 but in principle should work on any audio device.
Using Soundflowerbed
Open Soundflower and tick the audio device you want to use under Soundflower (16ch). As I'm a new user I can't post images but they are linked below. If I get the bounty then I will edit the post to include the images inline.
From here you would use Soundflower (16ch) as your audio input device in Java sound.
Creating an aggregate audio device
An alternative way to solve this if that didn't work is to create an aggregate device. Open Applications > Utilities > Audio Midi Setup and click the plus sign to create a new aggregate device.
Tick the device that you want to aggregate. You only want your USBMIC (As I'm a new SO user I can only post two images per answer so the next two are linked here).
The key part which may be giving you trouble is the clock on the device. If you select the Mac as the clock source then that may be more stable.
If this still doesn't work then you could try adding the Mac built-in audio to the aggregate device and making it the master clock by right clicking on the device you want to be the master.
Other options
Finally, I haven't used this before but Pulse Audio (Google it, I can't insert more links in this post) might be a possible solution for mixing your audio streams together. It looks quite heavyweight though.
According to my research, especially threads like this, the microphone you are using is most likely causing the problem. The thread states that the microphone is even a problem when it comes to switching games, so I am guessing that it will be a problem when switching platforms, too.
My suggestion is - if you have not tried this already - to use a different microphone! Most microphones I have messed around with have special chip controllers that convert data into the data compatible for the game system. Being that you are using this on an operating system for the computer, you are probably getting some very odd effects that you wouldn't get on a game system like Playstation or others.
Hopefully this helps! Happy coding!
The AudioFormat doesn't match the TargetDataLine's supported format. I don't know if that was a typo or not but the Exception thrown says the TargetDataLine supports 8 bit audio and right below that you said you're using a 16 bit AudioFormat. It also supports up to 2 bytes per frame, how quickly and in what size chunks are you trying to read the data? Sorry if that doesn't help but I thought I'd point that out in case it was overlooked.
If I have a bunch of video files, all in precisely the same format, shape, whatever, then can I play them back seamlessly without jumps or gaps? The effect from the end user's point of view would be as though they are watching one video.
I understand that this is possible in DirectX, but I'd rather use Java if possible.
If you want to play media in Java, the Sun standard is JMF (http://java.sun.com/javase/technologies/desktop/media/jmf/) which unfortunately has been dormant for quite a while.
The FMJ project (http://fmj-sf.net/) is API-compatible and under active development.
I cannot answer your question better, but hopefully this can get you further.
Anyone know if it is possible to write an app that uses the Java Sound API on a system that doesn't actually have a hardware sound device?
I have some code I've written based on the API that manipulates some audio and plays the result but I am now trying to run this in a server environment, where the audio will be recorded to a file instead of played to line out.
The server I'm running on has no sound card, and I seem to be running into roadblocks with Java Sound not being able to allocate any lines if there is not a Mixer that supports it. (And with no hardware devices I'm getting no Mixers.)
Any info would be much appreciated -
thanks.
For linux you can use OSS Virtual Mixer, which will give you virtual sound channels.
On windows there are a few sound drivers that do this, one is Virtual Audio Cable, which, while not free, is about the cost of a sound card so it shouldn't be a hardship.
If neither of those work for you, it'll probably be easier to make your own Java sound library and replace the built in functionality than it would be to implement a sound card for your OS.
-Adam
All java needs are the drivers for a sound card. The JVM relies on the OS to handle direct hardware management, all JVM needs is a way to tell the OS that it wants a sound played (thus the driver).