Event when streaming sound is ready to play
Hello,
I'd like to know, when a streaming sound has preloaded enough
and would
start to play.
Since I have also to preload some images and xml files, I
load a
streaming sound, stop it immediately and when everything has
enough
buffer, I want to start them all manually...
How can I do this?
josp
Hi josp,
I have the same question and I'm wondering--did you ever
figure it out?
Thanks,
mew
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Clicking noise when streaming sound to SourceDataLine
Hello,
I'm trying to stream sound to the PC's speakers using SourceDataLine, but I have trouble getting rid of a clicking noise.
It seems to occur when sourceDataLine.available() equals sourceDataLine.getBufferSize(). Is there a way to avoid this?
I am dealing with an audio of indeterminate length. Here's the test code:
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
public class PlaybackLoop implements LineListener {
SourceDataLine sourceDataLine;
AudioFormat format;
public PlaybackLoop() throws LineUnavailableException {
AudioFormat.Encoding
encoding = AudioFormat.Encoding.PCM_SIGNED;
int sampleRate = 8000; // samples per sec
int sampleSizeInBits = 16; // bits per sample
int channels = 1;
int frameSize = 2; // bytes per frame
int frameRate = 8000; // frames per sec
// size of 1 sample * # of channels = size of 1 frame
boolean bigEndian = true;
format = new AudioFormat(
encoding,
sampleRate,
sampleSizeInBits,
channels,
frameSize,
frameRate,
bigEndian);
// PCM_SIGNED 8000.0 Hz, 16 bit, mono, 2 bytes/frame, big-endian
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
sourceDataLine = (SourceDataLine) AudioSystem.getLine(info);
public synchronized void play() throws LineUnavailableException,
InterruptedException {
int bytesPerSec = (int) format.getFrameRate() * format.getFrameSize();
int intervalMs = 200;
int loop = 50;
int bytesSize = bytesPerSec * intervalMs / 1000;
byte[] bytes = new byte[bytesSize];
// creates a high pitched sound
for (int i = 0; i < bytesSize / 2; i++) {
if (i % 2 == 0) {
writeFrame(bytes, i, 0x05dc);
} else {
writeFrame(bytes, i, 0x059c);
sourceDataLine.open(format, 16000);
sourceDataLine.addLineListener(this);
int bufferSize = sourceDataLine.getBufferSize();
System.out.println(format.toString());
System.out.println(bufferSize + " bytes of line buffer.");
long nextTime = System.currentTimeMillis() + intervalMs;
sourceDataLine.start();
for (int i = 0; i < loop; i ++) {
int available = sourceDataLine.available();
if (available == bufferSize) {
// clicking noise occurs here
System.out.println("*");
int w = sourceDataLine.write(bytes, 0, bytesSize);
long currentTime = System.currentTimeMillis();
if (w != bytesSize) {
System.out.println("Not all written.");
// TODO
// time adjustment , to prevent accumulated delay.
long delta = (nextTime - currentTime);
long wait = intervalMs + delta;
if (0 < wait) {
this.wait(wait);
nextTime += intervalMs;
} else {
nextTime = currentTime + intervalMs;
System.out.println();
System.out.println("End play()");
public static void main(String[] args) throws LineUnavailableException,
InterruptedException {
new PlaybackLoop().play();
public static void writeFrame(byte[] bytes, int halfwordOffset, int value) {
writeFrame(bytes, 0, halfwordOffset, value);
public static void writeFrame(byte[] bytes, int byteOffset,
int halfwordOffset, int value) {
byteOffset += 2 * halfwordOffset;
bytes[byteOffset++] = (byte) (value >> 8);
bytes[byteOffset++] = (byte) (value >> 0);
public void update(LineEvent event) {
System.out.println();
System.out.print("Update:");
System.out.println(event.getType().toString());
}I have modified the code so that it shows how the audio goes out of synch
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineEvent;
import javax.sound.sampled.LineListener;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
public class PlaybackLoop implements LineListener {
SourceDataLine sourceDataLine;
AudioFormat format;
public PlaybackLoop() throws LineUnavailableException {
AudioFormat.Encoding
encoding = AudioFormat.Encoding.PCM_SIGNED;
int sampleRate = 8000; // samples per sec
int sampleSizeInBits = 16; // bits per sample
int channels = 1;
int frameSize = 2; // bytes per frame
int frameRate = 8000; // frames per sec
// size of 1 sample * # of channels = size of 1 frame
boolean bigEndian = true;
format = new AudioFormat(
encoding,
sampleRate,
sampleSizeInBits,
channels,
frameSize,
frameRate,
bigEndian);
// PCM_SIGNED 8000.0 Hz, 16 bit, mono, 2 bytes/frame, big-endian
DataLine.Info info = new DataLine.Info(SourceDataLine.class, format);
sourceDataLine = (SourceDataLine) AudioSystem.getLine(info);
public synchronized void play() throws LineUnavailableException, InterruptedException {
int bytesPerSec = (int) format.getFrameRate() * format.getFrameSize();
int intervalMs = 200;
int loop = 400;
int bytesSize = bytesPerSec * intervalMs / 1000;
byte[] bytes = new byte[bytesSize];
// creates a high pitched sound
for (int i = 0; i < bytesSize / 2; i++) {
if (i % 2 == 0) {
writeFrame(bytes, i, 0x05dc);
} else {
writeFrame(bytes, i, 0x059c);
sourceDataLine.open(format, 16000);
sourceDataLine.addLineListener(this);
int bufferSize = sourceDataLine.getBufferSize();
System.out.println(format.toString());
System.out.println(bufferSize + " bytes of line buffer.");
long nextTime = System.currentTimeMillis() + intervalMs;
sourceDataLine.start();
for (int i = 0; i < loop; i ++) {
int available = sourceDataLine.available();
if (available == bufferSize) {
// clicking noise occurs here
System.out.println("*");
int w = sourceDataLine.write(bytes, 0, bytesSize);
if (w != bytesSize) {
System.out.println("Not all written.");
// TODO
// printing time drift
if (i % 100 == 0) {
long currentTime = System.currentTimeMillis();
// this number increases
System.out.println(nextTime - currentTime);
nextTime += intervalMs;
System.out.println();
System.out.println("End play()");
public static void main(String[] args) throws LineUnavailableException, InterruptedException {
new PlaybackLoop().play();
public static void writeFrame(byte[] bytes, int halfwordOffset, int value) {
writeFrame(bytes, 0, halfwordOffset, value);
public static void writeFrame(byte[] bytes, int byteOffset,
int halfwordOffset, int value) {
byteOffset += 2 * halfwordOffset;
bytes[byteOffset++] = (byte) (value >> 8);
bytes[byteOffset++] = (byte) (value >> 0);
public void update(LineEvent event) {
System.out.println();
System.out.print("Update:");
System.out.println(event.getType().toString());
}The output looks like this:
PCM_SIGNED 8000.0 Hz, 16 bit, mono, 2 bytes/frame, big-endian
16000 bytes of line buffer.
Update:Start
200
1200
1450
1700
End play()
The printed number keeps on rising. (Maybe I'm not sending enough information to the audio input stream?)
The printed number should be stable if in synch, but it continues to rise, signifying that it's playing audio faster than it's being provided. When the audio input source is from a network streamed audio (instead of the test audio source in this example), it results in a buffer under run, which causes the clicking sound. -
Delaying a symbol playing until its audio is ready to play
I'm trying to create an elearning composition that requires voice over. I created a symbol that has an audio embedded in its timeline. When the symbol plays the audio also plays.
Sometimes, however the audio is delayed and falls out of sync with the animation. Is there a way to know when the audio is ready to play like a property of audio 'isPlaying' or the html5 audio event
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Blokeish has given you a very good start, but rather than listening for the canplay event, I'd recommend first stopping your symbol timeline right away, and then listening for the audio element's playing event.
For instance, you could add this to your compositionReady even:
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sym.getSymbol("your_symbol").$("your_audio element")[0].addEventListener("playing",function() {
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And then add a trigger to your symbol timeline at time zero to stop it:
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I'd expect this to delay your symbol playback reliably (especially when audio is preloaded), because your symbol won't play until your audio actually begins playing.
hth,
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I use safari, so my assumption is the problem lies there. I did a software update in January along with upgrading to snow leopard but this problem has been happening since before then.
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Flash animation with stream sound not playing in mac
Dear all,
I have made a 5 min animation with stream sound. Its playing perfectly in PC. But in mac, its not playing. Stream sound starts from frame 60. So mac plays the swf plays till 60 frame, after that it pauses. I tried importing different sound format (wav, aif, mp3) and tried with all sound export setting but the problem remain same; its playing only till 60. When i removed the sound, it played till end. Even with event sound, it plays till end. But with stream sound, the problem. The problem is only in mac; in pc its perfect.
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In my case, I ended up using AutoHotkey to tie individual tracks to the keys on an external keypad. This was an excellent solution for my problem, but I don't think AHK runs on Macs.
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NetStream.Play.InsufficientBW when streaming server side playlist
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Stop sound when another sound plays
Hey guys,
Using Flash Pro CC 2014, Actionscript 3
I am working on a soundboard and use buttons that play sounds, and I want to make it that when a new sound plays, it automatically stops the current sound from playing, that way 2 sounds dont play at same time.
But I also have a button that stops all sounds, I am using the "Click to Stop All Sounds" code under Audio and Video in the Code Snippets.
So I am basically wanting to make sure I can do both, keep the stop all sounds button, but also have it when you press any sound button, it stops all sounds and starts playing the current button/sound. Any suggestions?
BTW I am setting up symbols as buttons, not movie clips incase you need to know for coding, but I can switch to movie clips if its easier. I was just used to buttons on older versions of Flash for simple stuff like this.
Thanks.Thanks for the reply, I am new to actionscript 3 but am a fast learner. Maybe I am doing this wrong, but when I add the code it simply stops the sounds, but it wont play the sound from the button that I just clicked on. I want it to play the sound button clicked on, and also stop any other sounds that are currently playing.
For Flash 8, as2, I would add this to the button:
on (press)
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On as3, does it need to say this?
button_2.addEventListener(MouseEvent.CLICK, fl_ClickToStopAllSounds);
function fl_ClickToStopAllSounds(event:MouseEvent):void
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Hi Brian,
Thanks restoring and restarting didn't fix my problem - i have started it fresh and still it doesn't work. Basically I press ONCE on the remote, after the machine has not had any commands for 10 minutes, and the cursor skips from one end of the menu to the other - so I can't choose network or update software etc - I sometimes manage to stop it randomly in the middle of the menu if I press on a command in the middle of the cursor skipping all the menu steps...not sure what the problem is but I have basically not used my brand new apple tv since I bought it for that reason! I should call Apple support I suppose! grrrr hate wasting time with stuff like this!
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Pernille -
i placed my ipad on top of my CPU with a music playing,i heard a crack on the sound and when i checked it,i can no longer hear a sound playing on my ipad.i tried to check place a headphone its still playing a sound but when i pull it out,wont play at all.
I don't know if this will work but it's worth a try. I wonder if somehow you ended up with a short inside of your iPad. Give the things below are trying to see if that helps. Good luck.
Try a Restart.
Press and hold the Sleep/Wake button for a few seconds until the red "slide to power off" slider appears, and then slide the slider. Press and hold the Sleep/Wake button until the Apple logo appears.
Resetting your settings
You can also try resetting all settings. Settings>General>Reset>Reset All Settings. You will have to enter all of your device settings again.... All of the settings in the settings app will have to be re-entered. You won't lose any data, but it takes time to enter all of the settings again.
Resetting your device
Press and hold the Sleep/Wake button and the Home button together for at least ten seconds, until the Apple logo appears. Apple recommends this only if you are unable to restart it.
Or if this doesn't work and nobody else on the blog doesn't have a better idea you can contact Apple.
Here is a link to their contacts with most of the information below.
http://www.apple.com/contact/ -
Hello so as you can see in my question i have troubles with my sound
I cant hear annything of my sound in game and i did check everything
The weird thing is that when i put my headphone in i do hear the sound
Also my music plays without my headphone
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If the speaker sound is acceptable with everything except the game then there is a problem with that game and its settings.
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The description says it all. I bought a movie on iTunes but when I try to watch it plays back slowly with no sound. Then the video will speed up and the sound will work for a moment then off again and back to slow motion. I have a dell laptop running windows 7
Hi Normanwh,
If you are having video playback issues in iTunes on your Windows machine, you may find the following article helpful:
Apple Support: Troubleshooting iTunes for Windows Vista or Windows 7 video playback performance issues
http://support.apple.com/kb/ts1718
Regards,
- Brenden -
StopAllSounds vs. new Streaming Sound not playing
In my timeline, I'm using a stopAllSounds action (because the
user could be coming from anywhere in the movie and I need to stop
whatever narration might be playing), then, in the next frame, I'm
trying to stream a new sound. My problem is that the streaming
sound doesn't play. I've tried adding a few frames between the
stopAll Sounds action and the start of the streaming sound, but
that doesn't seem to be the problem. Any ideas would be greatly
appreciated.
- BillGI was about to try your suggestion, but after sending a few more test emails, I discovered that it does in fact play the sound sometimes. I sent about 20 test emails, and they were all received using the "idle" command, with about 75% of them playing the sound. There was a 5-10 second delay between the messages being received and the sound playing that I don't remember from Snow Leopard, but I'm not positive about that.
It shouldn't be the actual sound that is the issue, being that it is played sometimes, but I still don't know why it's not playing every time. I tried receiving messages with the app running in the background, with it minimized, and with it as the active window, but I couldn't find any specific instance that caused it to not play the sound.
I wasn't having this issue in Mail 4. It didn't start until I installed Lion, which I did a clean install of, if it matters.
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You must have a slower connection if it took 2.5 hours, did you pause it or exit out to the main screen? I've paused movies many times and it resumes..it could be due to the connection as well so what is your actual speed? Check www.speedtest.net Wifi or ethernet? Have you changed the DNS settings?
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You're not the only one. I'm having the same problem, currently no solution is known.
See this thread: https://discussions.apple.com/thread/6012766
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