Actionscript 3 :: How To Decoding Audio / Audio Playback
Jul 3, 2010
I'm interested in learning how to decode and playback audio in ActionScript 3. I understand how to write bytes to a Sound object using the SAMPLE_DATA event, so that's not really a problem. What I want to understand is how I could implement alternate audio formats for native playback inside of Flash Player. I guess what I'm asking is: how do I take something in X format and "convert/decode" it to WAV format and write the bytes to a Sound object, playing back the audio? I'm interested in writing a decoder for FLAC audio and possibly OGG audio, as these seem to be some of the most widely used open source audio formats
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Aug 6, 2010
If I import an FLV video is there any way to remove the audio, put the audio into a byte array, and then re-add the audio to the flv video?
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Jan 16, 2009
I've been developing in flash for a while now and now I have a job developing flash and actionscript 3.0. I have come across a project with a simple concept but I have found it difficult to implement.
What I want to do is allow the user to click a button and record their voice and then I want them to click another button and play it back. I don't need to save or store it and I don't have access to a flash media server or any alternative.
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Oct 15, 2007
I'm looking for a way to add seeking capability to audio playback. I can do it pretty easily for video, but I'm currently using a sound object which has no seek capabilities whatsoever.
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Jan 22, 2009
So my FLV videos play just fine, however when I click on any of the navigation buttons to visit another section of my website, the audio keeps on going. There must be some simple AS to stop the audio once a button is clicked. As it is now, the user has to stop the FLV video manually by clicking the stop button on the FLV playback component.
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Jul 11, 2009
I have an mp4 file that i made and i made it 7.1 surround sound, and i'm pretty sure that this 7.1 surround sound works, as it can be played in VLC. i'm using netstream to load my files now. How do i make it so that flash can playback all 8-channels of sound?
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Nov 9, 2010
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Jun 27, 2010
I want to add a simple audio control (play/pause/seek/volume) control to my flex application.
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Aug 9, 2010
I'm writing a flex app, which must record an audio and then playback. It records just fine, I can hear the flv on the server, but when it comes to the playback it cuts the end a little bit, and each time I ask to reproduce again it cuts a little bit more. I guess it's something related to buffer management, but I don't know exactly.
Here's the code I'm using to playback. It is called from a mediator:
var streamPlayClient:Object = new Object();
this.stream.client = streamPlayClient;
streamPlayClient.onPlayStatus = function(infoObject:Object):void {
if (infoObject.code == "NetStream.Buffer.Flush") {
stopPlayback();
}} this.stream.play("flv:" + this.streamName);
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Jul 30, 2009
We're creating video that is destined for multiple countries - we've created a framework that has a video page (using the FLV playback component, w an external FLV w/ progressive download) for the given languages we're using, and subtitles for each, etc.. Until now, we've been using the same English video & audio for each, but the client is looking into having the videos dubbed into different languages.
We're hoping to avoid re-encoding the video for each language in order to accommodate for the different audio tracks. Also, having different video files for each language would mean using more storage (since we're talking about a lot of video files, so it adds up). Is there a way to use FLV playback to progressive download an FLV file (video only) while playing a separate mp3 file? Most inquiries into playing separate audio and video has led me to embedding video, which isn't feasible in our case.
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Dec 11, 2009
[URL]. Site works fine after a lot of experimentation but there's 1 problem. If you start the video and go to another tab the audio continues go back again and it starts again, this can happen multiple times. I am using a flv playback component.
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Jul 13, 2009
I'm trying to playback some sample data through the new real-time audio capabilities of Flash Player 10. I started with the example given at the bottom of this page on livedocs, which seems to work fine and plays a crystal clear tone.I assume that the two writeFloat's in the example write to the left and right audio channels respectively and that the data being written is 32 bit (because of the float).
However. I seem to be having trouble converting my old 8 bit audio data to a format that is understood by this interface. When I playback my sample data I can vaguely hear the sound I'm expecting but it is massively distorted. My sample data consists of raw 8 bit samples that ranges from 0..255 where 127 is silence.
I've been trying different conversion formulas but I seem to be missing some vital information regarding this conversion.
UPDATE:The correct formula turns out to be:
f = (sample.data.readByte() - 127) / 255
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Feb 2, 2012
I have a custom Flash video player that uses the NetConnection and NetStream classes to stream mp4 files from a Wowza server. Lately the playback has been having audio problems. The sound is crackled and in some cases may cause the Flash player to crash. This is not consistent between files. Meaning that a file that was played once with bad audio could be fine 5 minutes later when played again from a new instance of the player , but 5 minutes later have the same problem.
My thought direct me to thinking this was an encoding problem, but that wouldn't explain how one second the playback is fine, and once refreshed messes up again.
I should note that the Wowza server does not stream the entire file but only a portion of it based on various parameters it gets.
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Aug 25, 2009
I ran a simple live video streaming application for the first time with actual users and ran into a couple of serious performance issues that had not turned up during testing. In this instance there was one video stream from a live web cam and used FMLE at 150 kbps using VP6 and MP3 @22k. There were 16 clients and everything worked pretty good for about 30 minutes. (although some clients said their audio and video were out of sync by up to 3 seconds)
Then individual clients would have either the video freeze or the video would continue and the audio would stop. These clints had to "disconnect" and then "connect" again to the application. This happened to all of the clients at one time or another for several minutes. I stopped and restarted the FMLE with progessively lower bandwidth settings down to 75 kbps but still clients were having the same issue.
I eventually stopped the FMLE and used the applications built in publisher at 45 kbps and that seemed to eliminate the freeze/dropping issue. But of course the video quality was very poor and some clients still reported that the audio was out of sync with the video. The server hosting the FMS application is a quad processor dell with lots of memory and network connectivity. The Flash Media Admin Console performance graph showed the total Bandwidth as 3 Mbps at maximum.
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Mar 11, 2010
Anyone know of a skinnable audio player (or something similar to Windows Vista audio control in task bar) that i can embed in my website?
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Aug 4, 2009
I am converting from .FLV's to .F4V. Video outputs fine but the audio sound stops after a few seconds from the beginning.I have tried many different settings for the audio with no luck. Also, tried on a colleague's machine who is running CS3, which works fine, so something is buggy in CS4...
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Mar 11, 2010
Because the player optimizes framerate, antialiasing etc dependent on the performance capabilities of the platform upon which it is running, it was nearly impossible to ensure animation syncronization w/ audio. If the audio were on the timeline you could set sync params to stream, but if the audio is loaded programically forget it .. well until AS3 ..The following code throttles the player framerate to lock step the animation to the audio .. not perfect but the principal works ..
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Sep 6, 2011
Let me first establish what I want to do:My user is able to record voicenotes on my website, add tags to said notes for indexing as well as a title. When the note is saved I save the path of the note along with the other info in my DB.Now, I have 2 choices to do the recording, both involve a .swf embedded in my site:
1) I could use Red5 server to stream the audio to my server and save the file and return the path to said file to my app to do the DB saving, seems rather complicated since I would have to convert the audio and move it to the appropriate folder that belongs to the user in a server side Red5 app, which I'm not very aware of how to build.
2) I could simply record the audio and grab its byte array, do a Base64 encoding on it and send it to PHP along with the rest of the data that is necessary (be it by a simple POST or an AJAX call), decode it on the server and make the file with the appropriate extension, audio conversion would also occur here using ffmpeg, this option seems simpler but I do not know how viable it is.
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Apr 1, 2012
Is there a way to stream and audio line level feed rather than the audio from a computer's microphone?
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I have an audio player that has a custom timeline and playhead. I am using a start and stop drag to move in the time line but the only way i can make it work is to have it play when ever I release the play head. I would like it to stay stopped if the player is paused and play if the player was playing.
[Code]...
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The images for animation load okay. The sound loads okay. But the animation images need to be inserted in coordination with the sounds, which is difficult using only the ears There is a visual graph of audio levels in the library window, which I have seen appear in the timeline also but only momentarily. I do not know how to keep the audio graph on the timeline so as to know where to put the images. I can keep the graph open on the little library window when it is open but not on the timeline. how to keep the graph open on the audio track while I work on the image tracks.
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Apr 13, 2011
My server is streaming binary audio data (mostly mp3 files) to a client (a browser). This client stores the audio data in memory.
What I'm looking for is a flash audio player that I can input the binary audio data so that it can play the audio file.
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Apr 25, 2011
I have a single audio file, I'd like to avoid cutting it up.
I know I can use the sound class, mySound.play(150), to start at 150ms but haven't come across a way to stop the audio say after 500ms or at 650ms.
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May 15, 2007
I'm looking for a (free) flash player that I can embed in my site and use to play a .m4a (.mp4 with AAC audio) file that will be obtained using a URL (i.e. it's not local to the server hosting the web page).I've tried searching on google for one, but either I'm searching wrong or no one has made such a thing. Ideally this would be very simple (small user interface with play button and maybe a progress bar) and it would be easy to have multiple instances of on an html page (can create the player with an <object> tag).
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Feb 24, 2011
I am new in action script 3.0. i am trying to build an audio player which will stream audio(mp3 etc.) from wowza media server. the player needs to have a play button, stop/pause button, a play progressbar and a volume scroll bar. i am using NetStream object to paly the audio
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Jun 15, 2009
I am creating an audio communication application. In that two users are able to communicate. But the problem is that some time in audio I am facing an echo problem.
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Jul 21, 2009
I was wondering if anyone could help me get some information on audio limitations in flash. Is it possible to have audio "scrubbing" that allows you to hear the audio as you scrub? Currently the only way I know to do this is by having it on the timeline, and set to stream. Using this method seems to be causing more issues than it solves. Preferably I would just like to load the audio in dynamically and then scrub through it. Is it possible to use that method and then still retain the ability to hear it as you scrub through it?I am having with the audio on the timeline. The main issue with this is that I have to manually add frames to the timeline, in addition to that I can not dynamically load the audio through xml. Well not that I know of.I think the best route is probably loading in the audio dynamically.
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Sep 13, 2011
I am streaming to live videos with audio to our webpage, each with it's own accompanying audio. On my laptop, I could stream them without any trouble but it would overheat so I had two new computers built just for encoding. Now, on the new computers, the 2 videos stream fine but only on audio file works at a time. The other just gets hung up on one note of sound and repeats very annoyingly over and over.
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Jan 28, 2012
I think it is loading the whole audio first into the swf, but I would like to get confirmation from someone more knowledgible.[code]I want it to stream the audio when the button is clicked only so that 100 of these swf will not slow down a whole webpage from loading.[code]I only start getting concerned when I noticed that on FF and Chrome, the page loads really quick but when I open the page in IE, it takes a very long time for the page to appear.
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Nov 22, 2011
Is there any tool can help me rip audio from SWF file and ave it in MP3 format separately in another folder, and extract audio stream to MP3, AAC, M4A, WAV, WMA, AC3, MP2 formats?
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