Start and stop recording

Hi, I'm new to this but I am working on a project and I need to record encoder measurement. I settled the system but now I can't trigger the starting and stopping of recording to a file. vi is attached below waiting for help?
Attachments:
Encoder_30.05.2014_deneme.vi ‏115 KB

Duplicate
http://forums.ni.com/t5/LabVIEW/time-based-recording/m-p/2868032

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Starting and stopping stream capture repeatedly

Hi,
I am building a vmail server that captures an incoming, continuous RTP voice stream from a hardware phone and records portions of that stream to disk, based on control messages received (like record/stop buttons for a continuous RTP stream).
The first time I record, the sound file on the file system is well formatted. Subsequent recordings result in headerless audio files (although the audio data is correctly output to file otherwise).
The problem is that I need to get header information written to the audio files for subsequent recordings.
Here is a bit of source code to show how I am starting and stopping recording. At this point, the processor is already created and realized and the MediaLocator is previously initialized:
     MediaLocator recordedML ;
     public void startRecording() {
          try {
               processor.start();
               DataSource ds = null;
               ds = processor.getDataOutput();
               recordingDataSink = Manager.createDataSink(ds, recordedML);
               recordingDataSink.open();
               // starts sticking captured data into a file
               recordingDataSink.start();
          } catch (IOException e) {
               e.printStackTrace();
          } catch (NoDataSinkException e) {
               e.printStackTrace();
     public void stopRecording() {
          try {
               recordingDataSink.stop();
               recordingDataSink.close();
               recordingDataSink = null;
               processor.stop();
               processor.deallocate();
          } catch (IOException e) {
               e.printStackTrace();
Calling startRecording() and stopRecording() the first time results in a properly formatted sound file on the file system, captured from my incoming RTP stream.
Calling startRecording() and stopRecording() subsequent times results in headerless audio files.
So the problem seems to be that subsequent calls to processor.getDataOutput() result in a DataSource that doesn't print a file header.
What I have tried includes:
-recreating the processor, but this doesn't work because it seems you can only do this once for a single incoming stream - the processor never reaches the configured state a second time.
-reconfiguring the processor or re-realizing the processor, which doesn't do what I want either.
One way that I think this would work would be to write out the audio header manually after the capture is complete, but this seems like a gross hack and I would rather do it through JMF.
Is there a way to fix this via JMF? Is this a JMF bug or is it intended to work this way?
Cheers,
-Jeff

Hi, I am unfortunately unable to help you but perhaps you could help me. I have a Java GUI that I want to enable to record voice from a mic at the click of a button (stopping automatically if possible) and save to a defined file in the code. Would you be able to help me here? I have tried different source and rejigged things but I cannot seem to get anything working.
Any help gratefully apreciated.

Starting and stopping a loop

I am importing a list of 10,000 emails into memory and then
comparing them to a database which holds over 400,000 records. It
doesnt take long for the <cfquery> to time out. I know there
must be a way to loop thru 20 or so, then stop, then loop thru the
next 20, etc. I cannot lengthen the timeout so I need to figure out
a way to process the data in chunks. Thanks.
<cfhttp method="Get"
url="
http://192.168.14.51/matt/email.CSV"
columns="Email"
name="importCSV"
delimiter="#chr(10)##chr(13)#"
textqualifier="">
<cfset counter = 0>
<cfloop index="element" list = "#CFHTTP.FileContent#"
delimiters="#chr(10)##chr(13)#">
<cfset counter = counter +1>
</cfloop>
<cfset start = 1>
<cfset end = 20>
<cfset lastRow = #counter#>
<cfloop from="#start#" to="#end#" index="loop">
<cfset ThisEmail =
listGetAt(cfhttp.filecontent,loop,"#chr(10)##chr(13)#")>
<CFQUERY NAME = "CheckEmail" DATASOURCE="t">
SELECT Email
FROM Subscriber_Info_New
WHERE Email = '#ThisEmail#'
</CFQUERY>
<CFIF CheckEmail.RecordCount EQ 0>
<CFQUERY NAME="Insert" datasource="t">
INSERT INTO Subscriber_Info_New
(Email)
VALUES (<cfqueryparam cfsqltype="CF_SQL_VARCHAR"
value="#Trim(ThisEmail)#">)
</CFQUERY>
</CFIF>
</cfloop>

quote:
Originally posted by:
Newsgroup User
I cannot lengthen the timeout so I need to figure out a way
to process
the data in chunks. Thanks.
Are you sure you can not lengthen the timeout. The
<cfapplication ...>
tag allows one to define a specific timeout for a given page,
as long as
that is less then the maximum timeout defined in the
administrator.
If this is not sufficient for your needs you will need to
break up your
process over multiple requests. Just starting and stopping
the loop in
a singe request does nothing for reducing the timeout
threshold of the
page. You can do this with scheduled tasks, web services,
and|or the
<cflocation ...> tag. You will need to pass through
relevant data about
what iterations to process, and use some kind of extra
request storage
for the results, such as server|application|session scopes,
databases or
files.
Hope that gives you some help.
Ian
Sounds like more than I know how to do. I cant change the
timeout because its set that way on purpose. I think Ill leave this
alone for now. Thanks.

Starting and Stopping FMLE from command line yields corrupt .flv files

I am using FMLE to record and live stream TV content. In order to this I am remotely calling FMLEcmd in order to start and stop encoding processes. The problem that I am running in to is that the .flv files generated are corrupt. The odd thing is that if I use the exact same profile XML from the GUI, then the encoding process works just fine and results appear as intended.
Here is the way my workflow works:
I start the process by calling
FMLEcmd /p C:\lighttpd\htdocs\xml\default.xml /l C:\lighttpd\htdocs\logs\log.txt
then at the conclusion of the recording I call
FMLEcmd /s "C:\lighttpd\htdocs\files\default.flv"
When I attempt to open the files using FFmpeg I get a codec error saying that no codecs were detected. When I attempt to open the files in VLC I get a error saying that the media types are "Undf". When I attempt to open or modify the files with flvtool2 I get an end-of-file error. My guess is that my stop command is incorrect and somehow abruptly stopping the stream, but I don't know another way to stop the stream. Do I need to specify a specific stream duration in the XML and make sure to call the stop command *after* the duration has been reached? What would cause this codec corruption when the same profile works properly from the GUI?
Here is the profile I am attempting to use.
<?xml version="1.0" encoding="UTF-16"?>
<flashmedialiveencoder_profile>
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        <description></description>
    </preset>
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        <video>
        <device>Osprey-440 Video Device 1A</device>
        <crossbar_input>0</crossbar_input>
        <frame_rate>20.00</frame_rate>
        <size>
            <width>640</width>
            <height>480</height>
        </size>
        </video>
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        <device>SigmaTel Audio</device>
        <crossbar_input>0</crossbar_input>
        <sample_rate>22050</sample_rate>
        <channels>1</channels>
        <input_volume>75</input_volume>
        </audio>
    </capture>
    <process>
        <video>
        <preserve_aspect></preserve_aspect>
        <deinterlace></deinterlace>
        </video>
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    <encode>
        <video>
        <format>VP6</format>
        <datarate>650;</datarate>
        <outputsize>640x480;</outputsize>
        <advanced>
            <keyframe_frequency>5 Seconds</keyframe_frequency>
            <quality>Best Quality - Lower Framerate</quality>
            <noise_reduction>None</noise_reduction>
            <datarate_window>Medium</datarate_window>
            <cpu_usage>Dedicated</cpu_usage>
        </advanced>
        <autoadjust>
            <enable>false</enable>
            <maxbuffersize>1</maxbuffersize>
            <dropframes>
            <enable>false</enable>
            </dropframes>
            <degradequality>
            <enable>false</enable>
            <minvideobitrate></minvideobitrate>
            <preservepfq>false</preservepfq>
            </degradequality>
        </autoadjust>
        </video>
        <audio>
        <format>MP3</format>
        <datarate>48</datarate>
        </audio>
    </encode>
    <restartinterval>
        <days></days>
        <hours></hours>
        <minutes></minutes>
    </restartinterval>
    <reconnectinterval>
        <attempts></attempts>
        <interval></interval>
    </reconnectinterval>
    <output>
        <file>
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            <enable>false</enable>
            <size>10</size>
        </limitbysize>
        <limitbyduration>
            <enable>false</enable>
            <hours>0</hours>
            <minutes>60</minutes>
        </limitbyduration>
        <path>C:\lighttpd\htdocs\files\default.flv</path>
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    </output>
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        <key>author</key>
        <value></value>
        </entry>
        <entry>
        <key>copyright</key>
        <value></value>
        </entry>
        <entry>
        <key>description</key>
        <value></value>
        </entry>
        <entry>
        <key>keywords</key>
        <value></value>
        </entry>
        <entry>
        <key>rating</key>
        <value></value>
        </entry>
        <entry>
        <key>title</key>
        <value></value>
        </entry>
    </metadata>
    <preview>
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        <input>
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        <audio></audio>
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        <directory>C:\Documents and Settings\Administrator\My Documents\My Videos</directory>
    </log>
</flashmedialiveencoder_profile>

If issue of corrupt file after cmd line not in GUI mode. Are you using some automation to copy/paste output flv to someother location?
AFAIK, after placing stop command, FMLE took some time to write proper EOF in FLV. wait ~10 sec for FMLE to complete file writing process and than play in FLV PLayer.
I tried manually with steps you mentioned and it's working fine for me.I playerd file in Applian Flash PLayer. "http://www.applian.com/flvplayer/"

Start and Stop Trigger using PXI-6120 and DigitalStartAndStopTrigger.vi not working :-(

Hello,
I've been trying for a while now to get my PXI unit to capture a waveform between a Start and Stop (Reference) Trigger using the NI example DigitalStartAndStopTrigger.vi downloaded from the NI website. However, whilst the start trigger and stop trigger seem to be working i.e. the VI runs and stops at the correct times there is never any data read from my DAQmx compatible PXI-6120 card. So I can see the VI is running around the aquisition loop but the Property Node AvailSampPerChan is always returning zero... this has me slightly puzzled. I thought this might just be a driver issue so I've updated my box to the following software versions (see below) and installed the latest drivers e.g. DCDNov07.exe (also from the NI site) but nothing has changed.
my software as of now.
Labview 7.1 (with the 7.1.1 upgrade applied)
Max 4.3.0.49152
DAQmx 8.6.0f12
Trad DAQ 7.4.4f7
before I updated I had the same problem but with the following versions:
Labview 7.1 (with the 7.1.1 upgrade applied)
Max 4.2.1.3001
DAQmx 8.5.0f5
Trad DAQ 6.9.3f4
So to cut a long story short I still have the same problem with the triggers... does anybody have any ideas what is going wrong?
To add insult to injury it the traditional DAQ example ai_start-stop_d-trig.vi was almost working correctly before I did the upgrade. It had the strange behaviour of capturing the AI0 channel but on the wrong edges (e.g. if I set Start on Rise and Stop on Fall it would do the opposite, Start on Fall and Stop on Rise).
I'm going to leave my box doing a mass compile over night but i'd really like it if someone could suggest a solution or point me in the right direction.
Many thanks,
Mike

Hi Graham
I'm out of the lab today but I'll try and answer your questions as best I can...
1) What are the values you have set for Buffer size, Rate, samples per read and post trigger Samples?
At the moment I have all the values (e.g. sample rate, buffer size etc) unchanged apart from the ones I mentioned in my previous post (see above). I have in the past played around with changing the buffer sizes and rates in the example VI but as this appeared to have no effect on the behaviour I now have them setup as in the download.
2) Does the program end after the stop trigger is implemented?
Yep, if I toggle the trigger line high then low I see the program exits the read loop and the VI stops running as expected.
3) Lastly can you give me the details of triggering method. Are you
using a digital train of users set digital pulses? how long is the
program running.I'm using the WriteDigChan.vi to manually toggle the first digital line of the PXI-6733 card which is wired directly to PFI0 of the PXI-6120 card. Generally, I just start the VI running and then toggle the line high, wait a couple of seconds and then toggle it low.
To me it all looks like it should be acquiring samples but as I said yesterday it just refuses to fill the buffer with any data (and hence no samples are read).
Any ideas? and thanks for you help,
Mike

I do not have the 'Advanced' tab on the menu bar. I am trying to change ringtone on my iphone 4s. Have done the following: Right cick on song, entered the start and stop times, but unable to proceed as need 'Advanced' tab in order to change to option.

I do not have the 'Advanced' tab on the menu bar. I am trying to change ringtone on my iphone 4s. Have done the following: Right cick on song, entered the start and stop times, but unable to proceed as need 'Advanced' tab in order to change to option.

You don't need to upgrade your software. But if you're struggling with Spry, IMO you should cut your losses and switch to something better for the longrun.
If you have a budget to work with, I highly recommend Project Seven's Pop-Menu Magic 3. It's easy to use in DW CS4, 5, 6 or CC. More importantly, it's bullet proof and works in all devices.
Pop-Menu Magic3 by PVII (commercial DW extension)
http://www.projectseven.com/products/menusystems/pmm3/index.htm
If you don't have a budget to work with, you can roll your own menus with jQuery plugins. A bit more effort on your part, but they perform better than Spry.
jQuery Superfish
http://users.tpg.com.au/j_birch/plugins/superfish/
jQuery MegaMenu2
DEMO:
http://www.geektantra.com/projects/jquery-megamenu-2/
DOWNLOAD:
http://code.google.com/p/jquery-megamenu/
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http://developer.apple.com/internet/java/tomcat1.html
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-bash: start_tomcat: command not found
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If anyone can help me, I would really, really, really appreciate it!
Thanks!
PowerBook G4 12" Mac OS X (10.4.5)

Why are there all those "/n" there? Either you or the place you copied from has the wrong slash. But still, it's wronger than that to have them at all: "\n" means a newline (i.e., press "return") not the actual "backslash en" characters. Sometimes people post code with those \n visible: by making it explicit where a line-break should be, one doesn't have as much trouble when a web browser reformats the text and puts line breaks where they don't belong.

Report on active sync actions (like starting and stopping the sync)

Is there a way to report on who stopped or started an active sync? I'm guessing it has to be stored somewhere, but I can't find it.
Thanks!

Hi Smit,
I believe you are talking about FMS AWS instance and you may be using a centos 4.0.2 instance AMI or lower?
Well ... earlier, options for stopping a centos AWS image was not available, but recently they are there in place, so I suppose if you use a new centos 4.5.1 AMI then probably you can start stop the aws instance on yuor will. Give ut a shot and let me know.
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Shiraz Anwar
I again cross-checked and found that you were right, start and stop is not supported there .... an alternative method is to take a snapshots of the runinng instnace and terminate that instance after that, later you can use your snapshot to attach to the EBS volume to run your system again. You may need to use the Elastic IP address, because you wont like your users to update each time you terminate the old instance, and create new instance from snapshot. I have never used it in this way, but this is one of the approach.

Music starts and stops during playback of burned DVD

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Start and stop a loop automatically subtracting at each iteration

Hi there,
I know that there are some topics about it, but I could not find any solution, especially because I use the version 7.1 and cannot open new version files.
My problem is as follows:
I need to charge a tank from 6 to 10 in the morning, every day during 3 days. The process must start and stop automatically, which means, no bottoms to start or stop. The start and stop conditions come from the hour.
I start with a big loop of 72 iterations, which corresponds to 72 hours.
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While this may work it can be improved significantly. This really isn't a state machine. This is basically the same as your flat sequence with the exception of using a While loop with a Case statement to implement each frame.
You should define what your actions are and create a typedefed ENUM naming them. State names of 1 through 24 are meaningless. Not to mention in your code many of the cases are duplicates of others. That would mean that all of those can be one state with logic to determine what action/state comes next. A properly defined state machine would not need the outside For loop. Without knowing your specific needs some examples of reason state names would be the following: Start, Stop, Exit, Error, Initialize, Get Tank Level, Fill Tank, Drain Tank, Idle, etc. Can you see how these are easier to understand than 1 through 24.
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"Does anyone know where the love of God goes when the waves turn the minutes to hours?"
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Adding Start and Stop characters to a text field???

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help!!!!

Hello and Welcome to Apple Discussions.
Follow the instructions in this article:
http://docs.info.apple.com/article.html?artnum=307078
mrtotes

Start and stop recording

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