Importsetting Pictures per Second

Hallo
The default Setting in the Adobe CS3 Pro for Videoimport is 25 pictures per Second.
My problem is that I don't really know with how many pictures per Second I actually recorded my footage.
The usermanual of my Panasonic Camcorder tells me that it records "about 6 single pictures per second".
But wouldn't that be way to few?
Thanks for helping me

it's this camera:
http://www.directshopper.de/image/zoom/pan/panasonic-nv-gs-150-eg.jpg
It's name is panasonic NV-GS-150. But that's the European name. I figuared since it's a regular camcorder it should record the standart of 25 pictures per second... any doubters?

Similar Messages

CO Pulse Frequency doesn't actually generate 1 Pulse per Second?

Hello all,
I have a VI layed out in the attachment below. I seem to have a lack of understanding on how to program this VI here. I just don't understand what is possibly going wrong.
The VI is very basic. The frequency has been set to 1, and the units are Hertz. To me, this means that the program should send one pulse to my linear actuator ONCE per second. I have a simple pulse counter set up in the VI as well to count how many pulses are actually being sent (using the DAQ assistant). Why is it that when I run the program, I get around 300 pulses per second? Raising the value makes it goes slightly faster, but lowering the value doesn't really make it go any slower. There seems to be no real correlation between the input frequency and the actual number of pulses that are sent.
I just simply want a program that I can input "1 pulse per second" or however many pulses I want per second and have the card send ONE pulse per second (or however many is input). Where do I start? I have a whole program written out and ready to go, but this basic concept here completely eludes me.
Thanks,
James
Attached: 1) Picture of concept that I'm completely baffled about 2) VI of my program which said concept is being used in
Solved!
Go to Solution.
Attachments:
Voltage vs Distance SM v1.1.vi ‏475 KB
COPulseFreq.jpg ‏75 KB

In the simple image, you are running a loop as fast as possible (there's no timing mechanism). Inside that loop, you configure the pulse task, start it, then immediately stop and clear it. You need to create the channel and configure the timing outside the while loop, before it starts, and you need to clear the task outside the loop as well, after the while loop terminates. Depending on what you want to do, you may be able to move the task start outside the loop as well, or just let the task auto-start.
You'll need to restructure your VI a bit. I can't tell if you want to clear the task after each step, or just change the frequency. If it's just the frequency, you can use DAQmx Write to change it; if you need to start and stop the task, you'll need some logic to do that once each time you want to restart (you may get an error if you start a task that's already running). There's no need for "Is Task Done?" since you're not using the output for anything.
EDIT: Also, it is always a good idea to put a wait inside loops that execute indefinitely. Otherwise they will spin as fast as possible, consuming all available processor time and preventing other code from running. If you configure your counter task properly the loop timing won't affect the pulse rate (because that's done in hardware) but there's no need to run the loop that fast.

Use several still images per second

For a time-lapse video that I shot I want the play speed to be several frames per second.
for example: I made 400 foto's and now I want to play them all in 40 seconds (10fps)
What I tried was the following:
load all the seperate images in order in Premiere Pro
Select all images
->"Speed/duration" menu
Now here is the part where I get stuck.
If I lower the duration per picture to as low as 1 second everything works perfectly fine, but if I try to set the seconds area to "0" and the column next to it to some value [e.g. 00:00:00:20] my video gets messed up.
The images indeed only last for a period shorter than a second, but I get a lot of "empty video" between the images.
For some reason the ripple edit does not seems to work anymore going into sub-second durations, since it does not automatically paste all the seperate images together anymore.
How could I try to fix it?
Also, what format is the column after the seconds? is this miliseconds? does it go from 0-99?

Great news. For Time-Lapse, I probably go with 3 - 5 Frames for my Stills Duration most often, but it depends on the look and feel that I am trying to obtain, and also the interval that the shooting took place. Sometimes I end up with less, but sometimes more - it just depends on the look. I usually do a test Project, and Import a few Images at 3 Frames, then play that many times, to see if I like it. If not, then off I go to 4 Frames, etc.. You were going in the other direction, as you already had a good feel for the pacing of your piece - you just needed to do the math to get there.
Good luck,
Hunt

Calls Per Second

I am working on a Tech Refresh upgrade and part of the upgrade will have the client changing the way they route calls to their IP IVRs. That being said, I think we are going to be short on Translation Routes and would like to create some new ones. I saw in the SRND that the recommendation is Translation Route Pool = 20 * CPS. I was wondering what is the best way to determine Calls Per Second with IP IVR? Any help would be very much appreciated. Thanks.

By far the easiest way is to look at the Calls Per Second coming into UCCE.
I just did this with a customer the other day and plotted them across the day, 5min intervals. Like so (a tad under 16 calls per second)
You need to jump onto your Logger and run this query (this table is not on a AW/HDS)
SELECT Time = CONVERT(char,DateTime,108), CPS = CONVERT(decimal(5,2), RouteCallDetailTo5/300.0)
FROM Logger_Meters
WHERE DateTime BETWEEN '05/07/2012 00:01'
AND '05/07/2012 23:59'
ORDER BY Time
Then send the results to Excel and draw a pretty picture.
Of course, this assumes all your calls arriving in the Call Router are trans routed to IPIVR.
Regards,
Geoff

Queries Per Second

Is there any why to get the number of queries per second on oracle database.
more specifically i want result like this
Number of Select statements per second:
Number of Insert statements per second:
Number of Update statements per second:
Number of Delete statements per second:
my database is
SQL> select * from v$version;
BANNER
Oracle Database 10g Release 10.2.0.4.0 - 64bit Production
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Linux: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production

Nimish Garg wrote:
yes our tech hod is asking, how much execution of queries (basically select) are getting executed on a particular server from a defied website, which use that particular db server.
he is basically asking select statement execution per second (average). i also believe this is meaning less but if there is any way, plz provide me solution.There is no solution to this ito querying Oracle v$ tables. There are numerous issues - including the same cursor being shared by for example a web session and a job process. There are no means to determine how many time the one has executed the same cursor versus the other. You can look at AWR tables and views - provided you have the appropriate Oracle license too. This will not give you session statistics that you can divide into web sessions versus other sessions. But it will contain some metrics that could be useful in determining the workload of the web app tier.
The correct approach would be instrumentation. Instrumenting the web app code to record the metrics that are required.
If you use Oracle Apex, then this is already available. Apex keeps track of click counts, web page performance and so on - allowing you to create a picture of how the web site is used, what the slower pages are and so on.
Besides instrumentation, there are no real viable and alternative solutions. Yes, you can add a SQL proxy in-between web application and database server - and this proxy server can record the required metrics. But such proxies are few and far in-between, introduces another layer of complexity, will likely have a negative impact on performance, and can introduce security complexities.
And I'm still not convinced that having an answer to the question posed, will have the slightest benefit. For example, let's say the answer is 10 SQLs/second. What does this mean? Is it good? Is it bad? Does it say anything about potential bottleneck? Does it say anything about performance?
No, it does not. It is meaningless.
What is meaningful for example, is looking at the hottest query (SQL) in the Shared Pool. The one that is executed the most. And then determining if this cannot be optimised. Or looking at the Shared Pool for queries that are not using bind variables - and addressing this problem with the developers, fixing their code. Or looking at the queries generating the most I/O and determining if the amount of I/O is justified and warranted.
I cannot see how knowing the SQL/sec of your web application tier has any meaningful information about workload or performance.

Horrible video skip / lag problem - once per second in all apps!

I built a new system last month (my first AMD) and I am having a really aggravating problem. In all games and all video playback I get an annoying skip once per second, every second. It affects sound during gameplay but not during movie or mp3 playback. It even happens with the visualization mode in Windows Media Player.
My system is as follows: MSI K8N Neo4-F, A64 3200+ venice core, MSI 6800GT 256MB PCI-E, two sticks of Corsair valueselect DDR400 512MB each, 500 watt PS, 160GB 7200 SATA HDD. Most recent NVIDIA drivers for everything. WinXP Pro with SP2 and all updates, DX9C. Nothing overclocked, all settings standard.
I have tried the following solutions:
1) BIOS upgrades, started with 1.4, installed 1.5, MSI tech support gave me 1.6b2 and I installed that. No luck with any of them.
2) Memory, installed per MSI directions, but I've tried all legal combinations, including one stick at a time. No change.
3) full format and reinstall of WinXP. No luck.
4) Switching between WinXP IDE drivers and NVidia drivers, with and without RAID drivers, No luck.
5) Removal of 6800GT PCI-E card and replacing with Ancient 8MB PCI Permedia2 video card. Problem still persists.
6) Disable onboard sound and LAN. No luck.
7) Running Fedora core 4 on second partition. Installed Nvidia video drivers, tried some games. THIS WORKS! No hitch, no skip, no nothing. Framerates are noticably slower but very stable. In WinXP I saw framerates bounce all over the place, from 230 FPS down to about 70 with one game. That same game on Linux ran smoothly at about 166 FPS with only occasional slight drops. The big FPS drops in Windows usually came right after one of the skips but didn't occure after every skip.
Right now I'm stumped. Linux uses totally different drivers for sound, LAN and SATA support. Some of those drivers don't fully use the Nforce4 chipset's features, maybe that's part of the difference.

Thanks TireSmoke:
I had found that sticky, but I took your advice and went thorugh it in detail last night. Lots of great info, fixes tweaks and tools, sadly none of them fixed my problem. The lag problem most people are reporting is not really like the wierd problem I am having. I have tried the recoommended fixes with ablsolutely no change in my system's behavior.
I am beginning to suspect a faulty motherboard component.
Russ_XP:
I think you are correct about fast writes. I googled the heck out of that last night and couldn't find any reference to enabling or disabling fast writes on PCI-E.
The drive is SATA-1. The Neo4-F is not SATA-2 enabled (there is a hack for it though). From memory I think it's a Western Digital WD1600-something, 7200 RPM dirve. I've tried it on both SATA buses and tried disabling the unused bus in BIOS.
I'm pretty sure I can dig up an old PATA drive somewhere and give that a try.
Gpalmer:
True enough, and I don't have these problems under Fedora. Sadly this is a cross-platform game development box, I need both XP and Fedora working.
Black_God:
Nope, this is a clean install. Although I wonder, could any of the built in XP update and security tools be causing this? I have disabled Windows firewall and virus protection monitoring.

Downloads per Second slower than normal

Hi, i've moved from profile ADSL MAX to ADSL 2+ however my downloads per second are average around 2-400kbs a sec, my download speed is just over 7mb and my downloads have been around 850kbs a sec.
Any reason to why this is?
I don't do much heavy downloads, most of my connection is used for either gaming or downloading some the app or playstation and its really slow at downloading anything.
If you want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side If the the reply answers your question then please mark as ’Mark as Accepted Solution

sorry my computer crashed here it is
FAQ
Test1 comprises of two tests
1. Best Effort Test: -provides background information.
Download Speed
4339 Kbps
0 Kbps
7150 Kbps
Max Achievable Speed
Download speedachieved during the test was - 4339 Kbps
For your connection, the acceptable range of speeds is 2000-7150 Kbps.
Additional Information:
Your DSL Connection Rate :7192 Kbps(DOWN-STREAM), 1060 Kbps(UP-STREAM)
IP Profile for your line is - 6345 Kbps
2. Upstream Test: -provides background information.
Upload Speed
821 Kbps
0 Kbps
1060 Kbps
Max Achievable Speed
>Upload speed achieved during the test was - 821 Kbps
Additional Information:
Upstream Rate IP profile on your line is - 1060 Kbps
We were unable to identify any performance problem with your service at this time.
It is possible that any problem you are currently, or had previously experienced may have been caused by traffic congestion on the Internet or by the server you were accessing responding slowly.
If you continue to encounter a problem with a specific server, please contact the administrator of that server in the first instance.
If you want to say thanks for a helpful answer, please click on the Ratings star on the left-hand side If the the reply answers your question then please mark as ’Mark as Accepted Solution

Acquire, display, and write data at 50 samples per second

I have a vi running on a PXI which samples data using two 4220's (all 4 channels) and one 6031 (only 6channels). I am acquiring data at 100 samples per second, but only need to write the data out at 50 samples per second. The data needs to be displayed at a minimum of 10samples per second. The problem is that the VI can not get 50samples per second writen to the file, it writes about 20 to 30samples per second.
I dont know if the issue is displaying the data which is holding up the writing at 50samples per second or if it is something else in the VI. I have moved the writing of the data to the outside of the while loop, but this did not help enough to reach 50samples/sec.
Is it better to change the waveform data types to dynamic waveforms? Would this increase speed of operations?
Galen
Attachments:
ATM_FrictionTests_v1.2.vi ‏375 KB

Galen,
Looking at your vi, I would recommend writing to your file in a different way. The function you are using is actually opening, writing, and then closing the file every time you call it. This greatly increases the amount of resources being used. Take a look at the Cont Acq to Spreadsheet File.vi example and note that the file is only being opened and closed once. The data is being written to the file during execution of the program, and then closed when the app is done running. The example is done in traditional DAQ but you should be able to do something similar with DAQmx. Try this and let me know if it helps.
Regards,
LA

How many of these objects should I be able to insert per second?

I'm inserting these objects using default (not POF) serialization with putAll(myMap). I receive about 4000 new quotes per second to put in the cache. I try coalescing them to various degrees but my other apps are still slowing down when these inserts are taking place. The applications are listening to the cache where these inserts are going using CQCs. The apps may also be doing get()s on the cache. What is the ideal size for the putAll? If I chop up myMap into batches of 100 or 200 objects then it increases the responsiveness of other apps but slows down the overall time to complete the putAll. Maybe I need a different cache topology? Currently I have 3 storage enabled cluster nodes and 3 proxy nodes. The quotes go to a distributed-scheme cache. I have tried both having the quote inserting app use Extend and becoming a TCMP cluster member. Similar issues either way.
Thanks,
Andrew
import java.io.Serializable;
public class Quote implements Serializable {
    public char type;
    public String symbol;
    public char exch;
    public float bid = 0;
    public float ask = 0;
    public int bidSize = 0;
    public int askSize = 0;
    public int hour = 0;
    public int minute = 0;
    public int second = 0;
    public float last = 0;
    public long volume = 0;
    public char fastMarket; //askSource for NBBO
    public long sequence = 0;
    public int lastTradeSize = 0;
    public String toString() {
        return "type='" + type + "'\tsymbol='" + symbol + "'\texch='" + exch + "'\tbid=" +
                bid + "\task=" + ask +
                "\tsize=" + bidSize + "x" + askSize + "\tlast=" + lastTradeSize + " @ " + last +
                "\tvolume=" + volume + "\t" +
                hour + ":" + (minute<10?"0":"") + minute + ":" + (second<10?"0":"") + second + "\tsequence=" + sequence;
    public boolean equals(Object object) {
        if (this == object) {
            return true;
        if ( !(object instanceof Quote) ) {
            return false;
        final Quote other = (Quote)object;
        if (!(symbol == null ? other.symbol == null : symbol.equals(other.symbol))) {
            return false;
        if (exch != other.exch) {
            return false;
        return true;
    public int hashCode() {
        final int PRIME = 37;
        int result = 1;
        result = PRIME * result + ((symbol == null) ? 0 : symbol.hashCode());
        result = PRIME * result + (int)exch;
        return result;
    public Object clone() throws CloneNotSupportedException {
        Quote q = new Quote();
        q.type=this.type;
        q.symbol=this.symbol;
        q.exch=this.exch;
        q.bid=this.bid;
        q.ask = this.ask;
        q.bidSize = this.bidSize;
        q.askSize = this.askSize;
        q.hour = this.hour;
        q.minute = this.minute;
        q.second = this.second;
        q.last = this.last;
        q.volume = this.volume;
        q.fastMarket = this.fastMarket;
        q.sequence = this.sequence;
        q.lastTradeSize = this.lastTradeSize;
        return q;
}

Well, firstly, I surprised you are using "float" objects in a financial object, but that's a different debate... :)
Second, why aren't you using pof? Much more compact from my testing; better performance too.
I've inserted similar objects (but with BigDecimal for the numeric types) and seen insert rates in the 30-40,000 / second (single machine, one node). Obviously you take a whack when you start the second node (backup's being maintained, plus that node is probably on a separate server, so you are introducing network latency.) Still, I would have thought 10-20,000/second would be easily doable.
What are the thread counts on the service's you are using?; I've found this to be quite a choke point on high-throughput caches. What stats are you getting back from JMX for the Coherence components?; what stats from the server (CPU, Memory, swap, etc)?; What spec of machines are you using? Which JVM are you using? How is the JVM configured? What's are the GC times looking like? Are you CQC queries using indexes? Are your get()'s using indexes, or just using keys? Have you instrumented your own code to get some stats from it? Are you doing excessive logging? So many variables here... Very difficult to say what the problem is with so little info./insight into your system.
Also, maybe look at using a multi-threaded "feeder" client program for your trades. That's what I do (as well as upping the thread-count on the cache service thread) and it seems to run fine (with smaller batch sizes per thread, say 50.) We "push" as well as fully "process" trades (into Positions) at a rate of about 7-10,000 / sec on a 4 server set-up (two cache storage nodes / server; two proxies / server.) Machines are dual socket, quad-core 3GHz Xeons. The clients use CQC and get()'s, similar to your set-up.
Steve

10,000 Recorc Per Second (In EJB 3.0)

hi all,
i have some mission critical tasks into my project, is it possible to persist 10 000 record per seconds,
1. AS - JBoss Application Server 4.0.4GA
2. Database - Oracle 10G 10.2.0.1
3.EJB - 3.0 Framework
4.OS - SunOS 5.10
4.Server - Memory: 16G phys mem, 31G swap, 16 CPU,
i know that i need performace
here is my configurations about performance
1. JVM Config Into JBoss
JAVA_OPTS="-server -Xmx3168m -Xms2144m -Xmn1g -Xss256k -d64 -XX:PermSize=128m -XX:MaxPermSize=256m
   -Dsun.rmi.dgc.client.gcInterval=3600000 -Dsun.rmi.dgc.server.gcInterval=3600000
    -XX:ParallelGCThreads=20 -XX:+UseConcMarkSweepGC -XX:+UseParNewGC
    -XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=31 -XX:+AggressiveOpts
    -verbose:gc -XX:+PrintGCTimeStamps -XX:+PrintGCDetails -XX:+PrintTenuringDistribution2. also i configure my database.xml file
<?xml version="1.0" encoding="UTF-8"?>
<datasources>
<xa-datasource>
    <jndi-name>XAOracleDS</jndi-name>
    <track-connection-by-tx/>
    <isSameRM-override-value>false</isSameRM-override-value>
    <xa-datasource-class>oracle.jdbc.xa.client.OracleXADataSource</xa-datasource-class>
    <xa-datasource-property name="URL">jdbc:oracle:thin:@192.168.9.136:1521:STR</xa-datasource-property>
    <xa-datasource-property name="User">SRVPROV</xa-datasource-property>
    <xa-datasource-property name="Password">SRVPROV</xa-datasource-property>
    <exception-sorter-class-name>org.jboss.resource.adapter.jdbc.vendor.OracleExceptionSorter</exception-sorter-class-name>
    <min-pool-size>50</min-pool-size>
    <max-pool-size>200</max-pool-size>
    <metadata>
         <type-mapping>Oracle9i</type-mapping>
      </metadata>
</xa-datasource>
<mbean code="org.jboss.resource.adapter.jdbc.vendor.OracleXAExceptionFormatter"
         name="jboss.jca:service=OracleXAExceptionFormatter">
    <depends optional-attribute-name="TransactionManagerService">jboss:service=TransactionManager</depends>
</mbean>
</datasources>3. Also i have one simple Stlateless Session Bean
@Stateless
@Remote(UsageFasade.class)
public class UsageFasadeBean implements UsageFasade {
     @PersistenceContext(unitName = "CustomerCareOracle")
     private EntityManager oracleManager;
     @TransactionAttribute(TransactionAttributeType.REQUIRED)
     public long createUsage(UsageObject usageObject, UserContext context)
               throws UserManagerException, CCareException {
          try {
               oracleManager
                         .createNativeQuery("INSERT INTO USAGE "
                                   + " (ID, SESSION_ID, SUBSCRIBER_ID, RECDATE, STARTDATE, APPLIEDVERSION_ID, CHARGINGPROFILE_ID, TOTALTIME, TOTALUNITS, IDENTIFIERTYPE_ID, IDENTIFIER, PARTNO, CALLTYPE_ID, USAGETYPE, APARTY, BPARTY, CPARTY, IMEI, SPECIFICCALLTYPE, APN, SOURCELOCATION, SMSCADDRESS, MSC_ID, ENDREASON, USAGEORIGIN, BILL_ID, CONTRACT_ID) "
                                   + " VALUES(SEQ_USAGE_ID.NEXTVAL, NULL, NULL, SYSDATE, SYSDATE, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL) ");
               return 1;
          } catch (Exception e) {
}3. and into client side i have 200 Threads, each of them tried to call this method 50 times
my result is that i can persist 10000 record in 20 seconds, without hibernate, with hibernate i got worst result :(,
also i hear that it is good idea to use JDBC 3.0 driver for performance,
i download newest oracle jdbc jar file from oracle site
http://www.oracle.com/technology/software/tech/java/sqlj_jdbc/htdocs/jdbc_10201.html
is this jar file JDBC 3.0 driver ?
is there any hibernate performance configuration?
is it any more performance tuning into JBoss or EJB with entity beans?
can anybody help me ? or is there any doc which can help me ?
Regards,
Paata,
Message was edited by:
paata
Message was edited by:
paata

What makes you think that your database, just the database (with the box that it is on) can handle that rate?
What makes you think that your network can handle that?
While this is going on is this the ONLY traffic that will be on the network?

Newbie trying to understand the frame/fields per second concept on video

Do video camera shutter speeds (1/60sec) reflect an interlaced field or a full frame comprised of two interlaced fields per part of a second.
I suspect that a shutter setting of 1/60sec means it's not a full frame of video but is just an odd or even lined interlace field. Meaning that if I want to shoot 30fps I need to keep my shutter setting on 1/60sec.
But if that's really the case, then what am I exactly shooting per second if actual NTSC frame rate is 29.97fps? I mean, the first 2p frames can easily be divided into two fields each, but what about the remaining .97frame. How can you divide that into two fields of interlaced video lines?
Forgive my ignorance but books have a bad habit of not answering back when you don't understand something they say.
iMac Intel Duo-Core; Intel Mac mini single-core Mac OS X (10.4.6)
iMac Intel Duo-Core; Intel Mac mini single-core Mac OS X (10.4.6)

The shutter speed is not relevant. I can be either field based or progressive. The frame rate is not dependent on the shutter speed.

Calculating Frames Per Second Accurately

I tried searching the forums for suggestions or code used to calculate FPS accurately... But was ultimately unsuccessful.
I think I have a pretty basic understanding of how it works... but I'm still left wondering if there's a better... or correct way of attacking the problem.
What I started out doing is taken a pre-cycle time sample using System's currentTimeMillis method, followed by the main parts I'm executing in my program and then took a second time sample. I subtracted the post-cycle from the pre-cycle to get the time... and it occurred to me that the currentTimeMillis is not exactly reliable. As it says in the API, "For example, many operating systems measure time in units of tens of milliseconds," when discussing that method.
I then noticed the nanoTime method and decided to use that.
It quite honestly seems to work perfectly for what I'm trying to accomplish.
I pretty much used the same steps as before.
But now my problem is that I want to limit the amount of frames per second to 60.
I decided that I should try using the Thread class's sleep(long millis, int nanos) method.
It seemed like it would work... but to my dismay, it did not.
The milliseconds, for the most part, were correctly timed... but still not always. The nanoseconds even less so... but I knew that the nanoseconds would be less reliable-I decided to use microseconds. Using microseconds doesn't even work that well.
So I wondered if there was an even better way... maybe a more 'manual' approach to fixing my problem.
I would greatly appreciate any input/knowledge on the matter.

its quite simple. Windows has an API call that can set the timer precision (its all based on some interrupt interval - I forgot the precise details). This precision is system wide, so if one application does it it is immediately active for all other applications running at that time. Applications can only lower it, so if you set it to 1ms then some other application cannot force it to 5ms for example.
Now here comes JVM bug number two.
As said the interval differs per system - sometimes it is 10ms, sometimes it is 15ms. The JVM wrongfully assumes it is always 10ms however. Do a test: try to sleep for some time that is a multiple of 10 (without the long running thread hack active); you'll find that the precision still sucks. That is because in this specific case the JVM does NOT change the system wide timing precision. But if you sleep for any number of milliseconds that is not a multiple of 10 it will actually temporarily set the precision to 1ms.
So the rule is: as long as one thread goes to sleep the precision is set to 1ms. When the last sleeping thread wakes up, it is reset to what it was. Then it also doesn't matter for what amount of time you make your real thread sleep as the long sleeping thread will not be sleeping for an amount that is a multiple of 10, thus forcing the precision to 1ms.
Now say that you don't do the long sleeping thread hack and you make your own thread sleep for say 9ms, switching to 1ms precision temporarily. This behavior makes it so that sampling the passed time (before and after sleeping) can be imprecise; you'll find that most of the time you'll get sampling that matches the number of milliseconds you slept and sometimes it jumps to 10/15ms depending on the granularity of your system. This is a concurrency problem; sometimes the precision is reset before you get a chance to sample the current time.
So to recap to give 100% accuracy with System.currentTimeInMillis(), you need to keep a thread sleeping at all time so the precision stays at 1ms.
And then finally we come to bug #3, which is a problem in Windows itself: rapidly changing the precision (which happens when you make a single thread sleep for short intervals) can screw with the system clock. I don't know if this problem still exists in later iterations of Windows, but it is again a reason to do the long sleeping thread hack. Because this is a known issue I still call this a bug in the JVM because of the way they implemented the precision timer activation, which can trigger the problem in Windows. The command line switch mentioned in the above bug report SHOULD have fixed that... but you know, facepalm bug #4.
But at the end of the day: even if at least 4 bugs can be named regarding precise timing in Java under Windows, the root of all evil is still the way timing is implemented in Windows itself making life too difficult for the poor JVM devs. What were the MS devs thinking at the time?

Final Cut Pro X Image Sequence Export missing frames per second option?

I am using the trial version of Final Cut Pro X. I can export an image sequence but it will only allow me to do so at 30 frames per second -every single frame!
So a 10 min movie takes half an hour to export 20,000+ frames that no one on earth has time to look thru.
In my old Final Cut Express I was able to choose 1 or 2 frames per second, which was just right.
What am I missing?
Do I need to buy Quicktime Pro or Compressor to allow me to export image sequences without exporting every frame?
Why would Apple even have an image sequence export if it only allows you to export every frame, or it that only in the trial version?
Thank you

I found a free option for you, if you don't already have Compressor 4.
In FCPX create your movie. Then SHARE as a Master File.
Get MPEG Streamclip, which is a free app available here.
http://www.squared5.com/svideo/mpeg-streamclip-mac.html
Drag your Master File into MPEG Streamclip.
In MPEG Streamclip, select FILE/EXPORT TO OTHER FORMATS.
In FORMAT: choose IMAGE SEQUENCE
In OPTIONS, choose your frame rate.

How to create a $ per second report.

I have a scenario where I have several stores all posting sales in real time to a BAM object.
The Fileds are:
StoreID "string"
PurchaseDate "datetime"
PurchaseAmount "integer"
I like to create a report that will display the sales per second for a given store over a defined Period of time.
As an example:
If the report is run and 60 seconds is entered as a report parameter for the period of time and StoreID set to "1" (also via paramter) then I'd like to know what was the average sales per second over the last 60 seconds for StoreID 1.
Obviously this report would be continually updating giving me a real time gauge indicating when sales per second has dropped or spiked.
A real example:
Lets say there are 3 sales in the last 60 seconds for StoreID 1 as follows -
1,3/20/1977 3:08:08 PM,100
1,3/20/1977 3:08:14 PM,160
1,3/20/1977 3:08:33 PM,100
If I ran the report at 3/20/1977 3:08:34 PM there would only be 3 entries which fall within the last 60 seconds (Report Paramter) for StoreID 1 (Report Paramter). And averaging out the sales total would give me (100+160+100)/60=6$/second
Can anyone point me in the right direction on how to solve this?
D

Not sure I understand what you want, but I set up a page with 2 items on one row, 3 on the next. http://apex.oracle.com/pls/apex/f?p=23834:30 is that the sorta thing you want to do? - control where the items appear?
If so - you can just use drag and drop layout, or on the items settings (Displayed settings), specify whether or not it appears on a new line or not.
Ta,
Trent

1,000,000 updates per second?

How could you configure a coherence cluster to handle processing a million stock quotes per sec? The datafeed could be configured as a single app spewing out all 1,000,000/sec or it could be many apps producing proportionately fewer ticks/sec but in any case it's going to total a million/sec. Fractions of the feed spread among multiple physical servers sounds smartest. The quote Map.Entry would probably have a Key of String (or char[] if that's more efficient - i know the max length). The Value would be a price and a size so maybe just those two elements byte[]{Float,Integer} or a java object with Float and Integer member variables. I'd want to trigger actions based on market conditions when the planets align just right so I'm not simply ignoring these values or pub/sub'ing them out to client apps, I'm evaluating many of them simultaneously and using them as event triggers. Is something like that remotely possible? On how much hardware?
Thanks,
Andrew

Andrew,
Using partitioning, Coherence can handle 1 million updates per second, but the big question is how many updates per second do you need on the hottest instrument at the hottest time?
The other question is related to "the planets lining up", because that may imply a global view of the market, which becomes more difficult in a partitioned system.
To provide a high rate of change to data in a partitioned system, the data providers (those with a large amount of data or a high rate of change) should be in the cluster (not coming in over *Extend) to eliminate one hop. To avoid blocking on the tick update from the data provider, it should locally enqueue the update. The queue servicer (a separate thread) should either coalesce whatever ticks are in the queue into a single putAll(), or if every tick needs to be recorded (i.e. all three ticks in the queue like "change to 3.5", "change to 3.55", "change to 3.6" have to be published, instead of just the latest "change to 3.6") then it would batch up everything in the queue until it hits an item that it already has in its batch, and then do a putAll().
The use of that async publishing mode is what allows for the much higher throughput, particularly when a data provider is producing a huge number of ticks in a given period of time. You can make it even smoother (e.g. avoid outliers caused by some servers being slower) by having more local queues+services (partitioned by Coherence partition, or at the extreme by instrument). You can determine the Coherence partition using the KeyPartitioningStrategy returned from the PartitionedService for the ticks cache.
Peace,
Cameron Purdy | Oracle Coherence
http://coherence.oracle.com/

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