Help: Cant record Audio & Video
Hi People, I have a creative webcam Live pro and it seems that I cant record a video with BOTH Audio and Video but works absolutely fine if recording one or the other. To elaborate, when the "include audio" box is unchecked, I can playback the video with no problems, however, when I check the "include audio" box, the audio is played back ok but the video does not move at all ( it seems like its permanently stuck on pause). Can anyone help me ? Many Thanks.
Ciao
you could launch the recording application, but it will not
within your FL app. Then you need to know the file name and
location since FL cannot browse the file system of the phone.
Also consider that this type of apps do not work for every
phone since some phones do not allow to execute other applications.
Here some tutorials that you can take a look at:
http://www.biskero.org/?page_id=342
Alessandro
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Please, help with Live Audio/Video example from jmf solutions
Hello,
I�m desperate looking for a solution for a particular problem.
I�m trying to feed JMF with an AudioInputStream generated via Java Sound, so that I can send it via RTP. The problem is that I don�t know how to properly create a DataSource from an InputStream. I know the example Live Audio/Video Data from the jmf solutions focuses on something similar.
The problem is that I don�t know exactly how it works, os, the question is, how can I modify that example in order to use it and try to create a proper DataSource from the AudioInputStream, and then try to send it via RTP?
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Please help me as I�m getting very stuck with this, I would really appreciate your help,
thanks for your time, bye.import javax.media.*;
import javax.media.format.*;
import javax.media.protocol.*;
import java.io.IOException;
import javax.sound.sampled.AudioInputStream;
public class LiveAudioStream implements PushBufferStream, Runnable {
protected ContentDescriptor cd = new ContentDescriptor(ContentDescriptor.RAW);
protected int maxDataLength;
protected int vez = 0;
protected AudioInputStream data;
public AudioInputStream audioStream;
protected byte[] audioBuffer;
protected javax.media.format.AudioFormat audioFormat;
protected boolean started;
protected Thread thread;
protected float frameRate = 20f;
protected BufferTransferHandler transferHandler;
protected Control [] controls = new Control[0];
public LiveAudioStream(byte[] audioBuf) {
audioBuffer = audioBuf;
audioFormat = new AudioFormat(AudioFormat.ULAW,
8000.0,
8,
1,
Format.NOT_SPECIFIED,
AudioFormat.SIGNED,
8,
Format.NOT_SPECIFIED,
Format.byteArray);
maxDataLength = 40764;
thread = new Thread(this);
* SourceStream
public ContentDescriptor getContentDescriptor() {
return cd;
public long getContentLength() {
return LENGTH_UNKNOWN;
public boolean endOfStream() {
return false;
* PushBufferStream
int seqNo = 0;
double freq = 2.0;
public Format getFormat() {
return audioFormat;
public void read(Buffer buffer) throws IOException {
synchronized (this) {
Object outdata = buffer.getData();
if (outdata == null || !(outdata.getClass() == Format.byteArray) ||
((byte[])outdata).length < maxDataLength) {
outdata = new byte[maxDataLength];
buffer.setData(audioBuffer);
buffer.setFormat( audioFormat );
buffer.setTimeStamp( 1000000000 / 8 );
buffer.setSequenceNumber( seqNo );
buffer.setLength(maxDataLength);
buffer.setFlags(0);
buffer.setHeader( null );
seqNo++;
public void setTransferHandler(BufferTransferHandler transferHandler) {
synchronized (this) {
this.transferHandler = transferHandler;
notifyAll();
void start(boolean started) {
synchronized ( this ) {
this.started = started;
if (started && !thread.isAlive()) {
thread = new Thread(this);
thread.start();
notifyAll();
* Runnable
public void run() {
while (started) {
synchronized (this) {
while (transferHandler == null && started) {
try {
wait(1000);
} catch (InterruptedException ie) {
} // while
if (started && transferHandler != null) {
transferHandler.transferData(this);
try {
Thread.currentThread().sleep( 10 );
} catch (InterruptedException ise) {
} // while (started)
} // run
// Controls
public Object [] getControls() {
return controls;
public Object getControl(String controlType) {
try {
Class cls = Class.forName(controlType);
Object cs[] = getControls();
for (int i = 0; i < cs.length; i++) {
if (cls.isInstance(cs))
return cs[i];
return null;
} catch (Exception e) { // no such controlType or such control
return null;
and the other one, the DataSource,
import javax.media.Time;
import javax.media.protocol.*;
import java.io.IOException;
import java.io.InputStream;
import javax.sound.sampled.AudioInputStream;
public class CustomDataSource extends PushBufferDataSource {
protected Object [] controls = new Object[0];
protected boolean started = false;
protected String contentType = "raw";
protected boolean connected = false;
protected Time duration = DURATION_UNKNOWN;
protected LiveAudioStream [] streams = null;
protected LiveAudioStream stream = null;
public CustomDataSource(LiveAudioStream ls) {
streams = new LiveAudioStream[1];
stream = streams[0]= ls;
public String getContentType() {
if (!connected){
System.err.println("Error: DataSource not connected");
return null;
return contentType;
public byte[] getData() {
return stream.audioBuffer;
public void connect() throws IOException {
if (connected)
return;
connected = true;
public void disconnect() {
try {
if (started)
stop();
} catch (IOException e) {}
connected = false;
public void start() throws IOException {
// we need to throw error if connect() has not been called
if (!connected)
throw new java.lang.Error("DataSource must be connected before it can be started");
if (started)
return;
started = true;
stream.start(true);
public void stop() throws IOException {
if ((!connected) || (!started))
return;
started = false;
stream.start(false);
public Object [] getControls() {
return controls;
public Object getControl(String controlType) {
try {
Class cls = Class.forName(controlType);
Object cs[] = getControls();
for (int i = 0; i < cs.length; i++) {
if (cls.isInstance(cs))
return cs[i];
return null;
} catch (Exception e) { // no such controlType or such control
return null;
public Time getDuration() {
return duration;
public PushBufferStream [] getStreams() {
return streams;
hope this helps -
Cannot record audio & video simultaneously
This may seem to be a bone-head question, but here goes:
When I FIRST start a new Captivate project, and choose to
begin my recording, after I select which application I wish to
record from the drop-down list, and then click the 'fit to window'
button, then click record, I get the animated countdown box showing
the 4.3.2.1 sign with a microphone graphic. This would lead one to
believe that as they are recording their screens, the voice
narration into the headset microphone is also being recorded; well,
on my Captivate, no audio is captured.
After the recording is complete and I stop the audio
narration, Captivate compiles the slides and takes you to the
editing screen. None of my slides, despite the voice narration,
contain audio.
It appears the only way I can add audio narration is to first
lay down the recorded screen slides, then record the narration on
"top of" each individual slide. Depending upon the situation and
some general factors, this may NOT be the ideal choice. I realize
that there are benefits to laying down the audio separately and on
an individual slide basis, but I should not only have this one
method - right?
Has anyone else encountered this? Are you also only able to
record audio after the motion slides have been generated? This is
really frustrating when you think you have delivered a fine audio
narration all the way through a recording only to discover no audio
was recorded with the screens/slides.
My headset and record settings are fine and I am at a loss.
Other Captivate users here experience the same thing.
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All of that is assuming you have first connected and
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correctly before you begin.
I disagree with your comment that there is EVER a time when
it might not be best to add audio narration after-the-fact, during
the editing stage. It is just a personal observation, but I believe
the "narration during recording" feature is the biggest mistake int
he history of this great application. It just shouldn't be done -
too much like patting your head and rubbing your stomach
simultaneously - requires coordination skills that are waaaaay
beyond those of the average bear. Create your movie complete with
actions, then during editing, add the audio to the movie. It's
quick, simple, and avoids problems with synchronization of hte
audio and the background changes in the movie ... that's just my
opinion, though ... -
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Can a video/audio "snapshot" be taken via iChat rather than just a one frame snapshot?
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Using standard video/audio (not HD), how much space is required on .mac to publish each 10 minutes of audio/video, once compressed?How can video/audio be recorded via iChat/iSight?TWO ways to record your iChat AV sessions:
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If you are asking about recording iSight video clips of other than iChat sessions, see the applicable links in the Some Applications you can use with iSight FAQ.
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<hr>Can a video/audio "snapshot" be taken via iChat rather than just a one frame snapshot?The only way I have tried that does NOT involve one of the apps listed above (or something like them) is pointing your video camera or camcorder at your Mac's video display.
<hr>How much storage/hour of video/audio using iChat/iSight?Depending on the compression scheme and software used for iSight recording, I have found numbers between 31 Kbps and 3.5Mbps. To find the space required for an hour, multiply those numbers by 3,600 seconds per hour and you can expect space requirements between 111 Megs and 12.7 Gigs per hour. I expect that these numbers are not the extremes of either end of the range.
See the info for each app for info about its particular capability.
<hr>Using standard video/audio (not HD), how much space is required on .mac to publish each 10 minutes of audio/video, once compressed?Dividing the hourly numbers (60 minutes) above by 6 give a range of from 18.5 Megs to 2.1 Gigs for 10 minutes of data. -
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In logic I have the tracks outputs set to mono 1,2,3. the ADAT is picking up all three tracks (all three meters are showing life). However, I am getting no sound out of output 3 (and therefore it is not recording into the ADAT) and I believe that 1 and 2 are coming in as stereo. Anybody know what I am doing wrong? I need this to run our tracks live for our show tomorrow and am having the worst luck!
(p.s. the interface only has four outputs.)The Saffire comes with a software applet (setup program) doesn't it. Maybe you have to set up the 4 individual outs there, it may be set to send only stereo out.
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Help! I just got my iPhone replaced, two monthes ago. ! AarrrggghhhH!https://discussions.apple.com/thread/3653155?tstart=0
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The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc. The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored. ... GeezBlog
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For some reason i cant record audio.
the line in doesnt show up in sound..only the digital in shows up which is useless..the analog line in worked for ten minutes then dissapeared now theres nothing there...help
Open Audio Midi Setup in Applications>Utilities, see the input & output options & KHz setting there, some things will change it for their own use, then not set it back.
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Audio / video sync issue in playback
for every recording i've made, when i play back the archive there is noticable lack of sync between the audio and the person's mouth. the video seems to lag behind by almost a second. the good news at least is that the delta is constant.
has anyone else experienced this? it's happening in any scendario i try, even if i'm just recording myself.
is the LCCS dev team aware of this? since audio and video streams are recorded separately, is there any way for me to programatically 'nudge' the streams into sync?
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i did as you suggested and recorded a video of myself using the recording and playback examples provided with the SDK (the 2.2 newest version btw).
the de-syncing of audio and video is definitely there. it seems especially bad for longer recordings. however, an interesting thing i discovered in playback:
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i understand that the video and audio streams are recorded separately and thus played back separately. my guess is that when those streams are retrieved and playback begins, one starts before/after the other because they're not retrieved at exactly the same time. it seems some extra work is required to ensure that their playback commences at exactly the same timestamp within each stream.
i can provide my recordings as an example if required.
this is a total showstopper for me. it renders the entire recording service useless if the playback can't have sync between audio and video. i would be happy to help with testing this more. can someone from the LCCS team comment on this issue?
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adam -
Audio/Video Out of Sync (PE 10)
I have read some posts regarding this, but they have not been helpful.
I recordered audio/video with an ASUS Transformer Pad Infinity TF700T in 720p .mp4 format.
When importing into Premiere Elements 10 on a Windows 7 (64bit) PC, the audio and video are sometimes out sync when editing, and when they are rendered to the final product, they are always out of sync.
I have tried changing to other formats (.avi), as some people stated that variable frame rate issues can come up when using a non-camcorder to record video, but the .avi actually made it worse, to the point that only the audio played.
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If anyone has advice as to how to fix this, it would be greatly appreciated. I've spent 7 hours on this project, and am more frustrated than ever.
Thank you.nierielimladris
I have downloaded your AVCHD.mp4 video, checked its properties, and studied its performance in Premiee Elements 10 Windows 7 64 bit from the point of view of import, playback of rendered Timeline in Edit Mode monitor, and playback of an AVCHD.mp4 export of that Timeline content. I stared into the monitor to watch the lip movements as the sound played back. In any of the following I have not observed any out of sync audio.
MediaInfo basic properties included
a. AVCHD video compression, frame size 1280 x 720 @ 15.119 progressive frames per second (variable frame rate with minimum = 13.501 and maximum at 18.793)
b. AAC audio, mono.
Premiere Elements 10 project preset that I used was
NTSC
AVCHD
AVCHD LITE 720p24
In Project media, Interpret Footage told me that it recognized a frame rate of 15.0710.
Rendered the Timeline content and watched the lip movement as I listened to the audio. No out of sync audio.
For export,
Share
Computer
AVCHD
Presets = MP4 HD720p24
under the Advanced Button/Video Tab, I set for 1220 x 720 @ 15 progressive frames per second. The export settings dialog under Advanced Button/Video Tab looked like the following
I watched the playback of this AVCHD.mp4 export and again did not observe any out of sync audio.
All video playbacks were with Windows Media Player 12.
Have you worked specifically with the video clip that you provided for download? If you have and you
found out of sync audio, then I am suspecting that this might be a system rather than a video problem.
It is a way out stretch, but...there have been some strange display goings on with Premiere Elements 10 and NVIDIA video card drivers recently. For all these cases, the answer has been rolling back the video card driver instead of the typical "making sure you have the latest version of the driver installed". What video card are you using in your computer?
Please review and then we can decide what next.
Just a note...this is a public forum with many viewing. Please do not post anything that would invade your privacy or is of a personal nature.
Looking forward to your follow up.
ATR -
I cant see the Video of WMV file through Flip4mac, only audio is working fine on macbook pro. Could anyone please help?
Hi,
Check to see that external video is turned on.
View > External Video > All Frames. and
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Sandeep -
Need help recording Video over pre-recorded Audio
I'm making a music video, the audio has already been recorded, but I am having such a hard time trying to figure out how to record the video over it. I need to be able to hear the audio track while recording so I can sync it properly, but whenever I click on the 'Open Camera Import Window' button, it doesn't allow you to playback the audio. What is the easiest way I can go about this?
PS. If my question is vague or unclear, I'm sorry. Every person I have asked said they had no clue what I was asking.Hi Rick,
Thank you for your response.....I have always done this process using other software for the videos....so the process here is different for me.
I pre record the audio first, then edit to remove all of the terrible sounds...breathing, mispoken words, etc...clean up the audio, then add a background music track all in Audacity. Then, I add that track in and record my video over it. I am creating a tutorial for a software company on how to use their software.
This may seem backward. My question now, I am in Captivate 7, I press video demo and it goes straight to recording the video before I have a chance to import the audio track. I need the audio track so I can get the video to follow the audio...if that makes sense.
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Cant hear audio nor record videos
Just got a new Mac and seem to be missing some features found in my iMovie HD Tiger based Mac.
1. When I wish to import video I usually will play it first and for some reason I cannot hear any sound on my Mac. Why is this? I am using a FireWire based Camcorder and iMovie HD was able to play with sound.
2. Also I want to record a video using my Camcorder and not use up tape space. This could be done easily in iMovie HD. I tried to do this in iMovie 09 but it only recorded like 10 seconds before cutting out. The built in iSight Camera in the MacBook is lousy, so I wont use that instead.
John1. When I wish to import video I usually will play it first and for some reason I cannot hear any >sound
on my Mac. Why is this? I am using a FireWire based Camcorder and iMovie HD was able to play >with
sound.
iMove 09 does not play sound on import, but the sound is there when you edit. Apple has never said why they chose to do it this way, but a likely explanation is that iMovie was designed to work with many different camcorders including SDHC card, hard disk, DVD, and DV. Of these DV is the only one where it makes sense to play sound on import since the others import faster or slower than real time, depending on your equipment. So Apple probably decided to make the behavior consistent for all formats. Just a guess. Most DV camcorders have a speaker, so you can still get sound if you need it.
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