Downloadhelper which video streaming to choose?

Using Firfox Downloadhelper Add-on for one particular Youtube movie, I found many video streams available.
Please tell me which one of these video streaming has the highest video quality?
What is the typical data file size per one minute of video play?
[360p] Full Movie).flv
[Medium] Full Movie).mp4
[HQ5] Full Movie).flv
[HQ36] Full Movie).3gp
[Mobile] Full Movie).3gp
[HQ134] Full Movie).mp4
[HQ133] Full Movie).mp4
[HQ160] Full Movie).mp4
[HQ139] Full Movie).mp4
[HQ141] Full Movie).mp4
Thank you

The largest file size usually has the best quality, avoid .3gp videos.

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Fromethius,
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Cheers,
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Hi,
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Contact them and ask them which video streaming standards they use. The most popular are:
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Is there dvd software out there that allows you to create a dvd menu in which the viewer can choose to play different sequences of the videos offered?

Is there dvd software out there that allows you to create a dvd menu in which the viewer can choose to play different sequences of the videos offered? It was described to me as a dvd matrix menu but I can't find anything like it for mac. The idea is that there are multiple videos on the dvd menu and you can choose to play "video A, then B, then C" or "video B, then C, then A", etc, in different orders each time. And it would play the sequence that you choose.

meghanica wrote:
I think that's on the right track but I'm wanting something that allows the viewer to choose the sequence when they're looking at the DVD menu. I only see how the creator of the DVD can make different sequences. It's a yoga tutorial DVD and we are wanting the viewer to be able to pick a sequence from the menu items as such: pick one of the 3 warm-up videos, then pick one of the 2 yoga practices and then pick 1 of the 3 cool-down videos and then the dvd will play the sequence of selected warm up, practice, then cool down. And it can be differently chosen every time the viewer uses the menu.
You can do this on a DVD with DVD Studio Pro.
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http://www.kenstone.net/fcp_homepage/dvd_language_nattress.html
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DVD's have limits on the number of chapters & titles, you need to plan around that.
Some DVD players are terrible to navigate, the settings that a user selects will be forgotten when the player is powered off. Users will need to make the choices over & over, every time they use the DVD (computers may remember it - I haven't tested this in years).
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For R&D testing of video "set-top" devices I want to initiate some internal processing on our UUT, then using a PXI-1491 analyze the digital (HDMI) video output of the UUT for some large number of seconds (180 seconds or more for example).
The video that is being analyzed will have static image content. The amount of time I want to analyze the test stream after doing some stuff on the UUT is variable, but I always anticipate it being fairly long.
It currently appears that I have to have a reference stream that contains exactly the same number of frames as the test stream.
This makes the reference vbf files very large. My test requirements include a large number of resolutions that must be tested through the UUT. Having an extensive library of very large vbf files is logistically difficult, it would much easier to maintain such a library made up of single "golden" frame reference files instead. Additionally, since my analyze time needs to be variable depending on test setup and UUT processing options, it would be better for me to have a single golden reference frame and validate alot of test frames against it.
Since the analyzed video will have static images, is it possible to run a test video stream against a single reference frame (reduced reference) instead of having a full reference stream frame by frame?
Solved!
Go to Solution.

Doing exactly what you are asking is not within the design of PQA. Of course, the best option that we would recommend when working with video test is a large capacity hard drive, probably in a RAID configuration for more space and better performance, and then just taking a golden reference with 10k frames, and doing what you originally suggested.
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1) Acquire your source from your 1491 provider with no processors, and saving the media stream to disk.
Loop:
2) Load PQA with the disk buffer provider instead of the 1491, the disk buffer file will be the acquisition from above
3) Point the start frame to your current location.
4) Perform your processor with the results.
5) Repeat and iterate to a new start frame location
This process is going to be much slower as you load and unload resources every time. If you choose to go this way, a better implementation would be to maybe consider doing 100 frames at a time, or some number larger than 1, because the processing time of handling the extra frames is going to be less than loading/unloading PQA.
Your second option is going to require more work outside of PQA to implement custom functionality through a Custom User Processor. Effectively this allows you to come up with a way to process incoming data in ways that you'd like. To do this you will need:
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2) Vision Development Module - To perform your image processing
3) An unencrypted video source - Due to limitations of HDCP we can not expose the raw video feed to user processors.
In this user processor you would:
1) Load your static image/frame in directly, you wouldn't need to use the Media Ref input
Loop
2) Load the current frame from the incoming video array
3) Perform your video measurement with the Vision function, likely PNSR or SSIM since these are currently the only 2 referenced measurements in PQA.
To learn more about Custom User Proessor's, in the PQA help check out: NI PQA Executive and the NI PQA Configuration Panel>NI PQA Tabs>Processors tab>Customizable Output Processors>User Processor as well as: http://digital.ni.com/public.nsf/allkb/514058CC830D86EE86257881004CB45F
Paul Davidson
Sound and Vibration Software Staff Product Support Engineer
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Hi,
My Apple TV used to work fine until yesterday, it suddenly started to freeze the video stream on airplay mirroring using youtube and other streaming sites (both on tv and on my devices, I've used 2 different Iphones and an Ipad and it's all the same).
None of the rebooting, resetting, Airplay on/off solution has worked. Also tried restarting all my devices, my router etc...
It's connected to the internet via an ethernet cable so no wifi issues either.
It airplays the device screens ok and I can see my own photos or videos just fine but when I go to youtube or other video streaming sites (which is pretty much the only reason I USE it !) I can browse and choose my videos but as soon as I play them it goes on fullscreen mode and starts to buffer endlessly. Then the message "cannot play content, try again later" pops up and quickly disappears.
As soon as I stop Airplay though, the video resumes on my devices...
I think this happened after the last update...not sure though
Any ideas?

So there could indeed be wifi issues then.
Intermittent problems are often a result of interference. Interference can be caused by other networks in the neighbourhood or from household electrical items.
You can download and install iStumbler (NetStumbler for windows users) to help you see which channels are used by neighbouring networks so that you can avoid them, but iStumbler will not see household items.
Refer to your router manual for instructions on changing your wifi channel or adjusting your multicast rate.
There are other types of problems that can affect networks, but this is by far the most common, hence worth mentioning first. Networks that have inherent issues can be seen to work differently with different versions of the same software. You might also try moving the Apple TV away from other electrical equipment.
The following article(s) may help you.
Troubleshooting Wi-Fi networks and connections
Recommended Wi-Fi settings
Sources of Interference
Wifi Diagnostic Software (for Mac users)
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However, I can't find any client applications out there that seem to support this. I can't even really get a clear answer as to whether or not HTTP Live Streaming for iOS has a feature for providing chapter metadata.
Any help would be greatly appreciated! Thanks.

My most sincere of apologies. My "instruction redo" for clarity included a cerebral gaseous emission in the one place that was most important.
Step 6 should read "Select "Movie""
1. Go to iTunes->Home Videos
2. Right-click the video
3. Choose "Get Info"
4. Click the "Options" tab
5. Click the "Media Kind" pull-down menu
6. Select "Movie"
7. Click "Okay"
Fell into that trap where you read something over several times to make sure you got everything correct, but you aren't really looking because you KNOW you got everything right.
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Message was edited by: Clyde Crocker to replace "brain **** " with "cerebral gaseous emission".

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// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms of the Adobe license agreement accompanying it.
// If you have received this file from a source other than Adobe, then your use, modification, or distribution of it requires the prior
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        initialise();

Should I have posted this in the Spry forum instead? My apologies if this is the wrong forum.
>There is a sample application of the code included with the zip file which shows how to implement it.
The sample doesn't really tell me what I need to do to the code to make it work (I do not know javascript), and unfortunately, I have not found any helpful instructions/documentation online. You've given me the answer, I just don't know enough to implement it. This is what I've done:
1. Placed the FAVideo.js file in my site folder and linked it to the page: <script src="FAVideo.js" type="text/javascript"></script>
2. I added the following code (taken from the SimpleDemo.html example inside the FAVideo folder). My comments in bold. Page at
http://www.librarymedia.net/Flash2/videoplayer2.html?source=rtmp://63.116.232.6/vod/mp4:Ol ympics2010_640x480.mov
         <! To the <body> section:-->
<body onLoad="">
    <div id="divOne"></div>
<!-Do I have to place the entire page within the "divOne" div (or just the section containing the tabs) in order for the javascript to work?-->
         <!-In the <head> section: -->
   <script type="text/javascript">
        playerOne = new FAVideo("divOne", "TabbedPanels1", "demo_video.flv",0,0,{ autoLoad:true, autoPlay:true });
    </script>
<!- I noticed that the body code added a div id called "divOne", so I added the "TabbedPanels1" div id to the above code thinking that this would apply the javascript code to all of the tabs. Dreamweaver adds <div id="TabbedPanels1" class="TabbedPanels"> to the page when you insert the tabbed menu, so I'm thinking the javascript has to point to either one of those for it to work. The "demo_video.flv",0,0 code is probably unneccesary, right? As you can see, I'm completely clueless. -->
    <script>
        playerOne.addEventListener("playheadUpdate",this,myHandler);
        playerOne.removeEventListener("playheadUpdate",this,myHandler);
        function myHandler() {
            //alert("eh");
    </script>
</body>
Once again, thanks for your help.

CTD bug in simple video streaming applet.

I'm trying to write a simple applet to use JMF to allow an end-user to view a video stream that's being served up by VLC. It doesn't have to look immensely pretty (in fact, streamlined is what I want most). I swiped some code from the jicyshout project (http://jicyshout.sourceforge.net) which handles streaming MP3s, and borrowed a framework for an applet from one of Sun's example applets for the JMF.
Here's my code so far:
** begin file SimpleVideoDataSource.java **
import java.lang.String;
import java.net.*;
import java.io.*;
import java.util.Properties;
import javax.media.*;
import javax.media.protocol.*;
/* The SeekableStream and DataSource tweaks are based on the code from
* jicyshout (jicyshout.sourcefourge.net), which was written by Chris Adamson.
* The code was simplified (no need for mp3 metadata here), cleaned up, then
* extended for our puposes.
* This is a DataSource using a SeekableStream suitable for
* streaming video using the default parser supplied by JMF.
public class SimpleVideoDataSource extends PullDataSource {
protected MediaLocator myML;
protected SeekableInputStream[] seekStreams;
protected URLConnection urlConnection;
// Constructor (trivial).
public SimpleVideoDataSource (MediaLocator ml) throws MalformedURLException {
super ();
myML = ml;
URL url = ml.getURL();
public void connect () throws IOException {
try {
URL url = myML.getURL();
urlConnection = url.openConnection();
// Make the stream seekable, so that the JMF parser can try to parse it (instead
// of throwing up).
InputStream videoStream = urlConnection.getInputStream();
seekStreams = new SeekableInputStream[1];
seekStreams[0] = new SeekableInputStream(videoStream);
} catch (MalformedURLException murle) {
throw new IOException ("Malformed URL: " + murle.getMessage());
} catch (ArrayIndexOutOfBoundsException aioobe) {
fatalError("Array Index OOB: " + aioobe);
// Closes up InputStream.
public void disconnect () {
try {
seekStreams[0].close();
} catch (IOException ioe) {
System.out.println ("Can't close stream. Ew?");
ioe.printStackTrace();
// Returns just what it says.
public String getContentType () {
return "video.mpeg";
// Does nothing, since this is a stream pulled from PullSourceStream.
public void start () {
// Ditto.
public void stop () {
// Returns a one-member array with the SeekableInputStream.
public PullSourceStream[] getStreams () {
try {
// **** This seems to be the problem. ****
if (seekStreams != null) {
return seekStreams;
} else {
fatalError("sourceStreams was null! Bad kitty!");
return seekStreams;
} catch (Exception e) {
fatalError("Error in getStreams(): " + e);
return seekStreams;
// Duration abstract stuff. Since this is a theoretically endless stream...
public Time getDuration () {
return DataSource.DURATION_UNBOUNDED;
// Controls abstract stuff. No controls supported here!
public Object getControl (String controlName) {
return null;
public Object[] getControls () {
return null;
void fatalError (String deathKnell) {
System.err.println(":[ Fatal Error ]: - " + deathKnell);
throw new Error(deathKnell);
** end file SimpleVideoDataSource.java **
** begin file SeekableInputStream.java **
import java.lang.String;
import java.net.*;
import java.io.*;
import java.util.Properties;
import javax.media.*;
import javax.media.protocol.*;
/* The SeekableStream and DataSource tweaks are based on the code from
* jicyshout (jicyshout.sourcefourge.net), which was written by Chris Adamson.
* The code was simplified (no need for mp3 metadata here), cleaned up, then
* extended for our puposes.
/* This is an implementation of a SeekableStream which extends a
* BufferedInputStream to basically fake JMF into thinking that
* the stream is seekable, when in fact it's not. Basically, this
* will keep JMF from puking over something it expects but can't
* actually get.
public class SeekableInputStream extends BufferedInputStream implements PullSourceStream, Seekable {
protected int tellPoint;
public final static int MAX_MARK = 131072; // Give JMF 128k of data to "play" with.
protected ContentDescriptor unknownCD;
// Constructor. Effectively trivial.
public SeekableInputStream (InputStream in) {
super (in, MAX_MARK);
tellPoint = 0;
mark (MAX_MARK);
unknownCD = new ContentDescriptor ("unknown");
// Specified size constructor.
public SeekableInputStream (InputStream in, int size) {
super (in, Math.max(size, MAX_MARK));
tellPoint = 0;
mark(Math.max(size, MAX_MARK));
unknownCD = new ContentDescriptor ("unknown");
// Reads a byte and increments tellPoint.
public int read () throws IOException {
int readByte = super.read();
tellPoint++;
return readByte;
// Reads bytes (specified by PullSourceStream).
public int read (byte[] buf, int off, int len) throws IOException {
int bytesRead = super.read (buf, off, len);
tellPoint += bytesRead;
return bytesRead;
public int read (byte[] buf) throws IOException {
int bytesRead = super.read (buf);
tellPoint += bytesRead;
return bytesRead;
// Returns true if in.available() <= 0 (that is, if there are no bytes to
// read without blocking or end-of-stream).
public boolean willReadBlock () {
try {
return (in.available() <= 0);
} catch (IOException ioe) {
// Stick a fork in it...
return true;
// Resets the tellPoint to 0 (meaningless after you've read one buffer length).
public void reset () throws IOException {
super.reset();
tellPoint = 0;
// Skips bytes as expected.
public long skip (long n) throws IOException {
long skipped = super.skip(n);
tellPoint += skipped;
return skipped;
// Trivial.
public void mark (int readLimit) {
super.mark (readLimit);
// Returns the "unknown" ContentDescriptor.
public ContentDescriptor getContentDescriptor () {
return unknownCD;
// Lengths? We don't need no stinkin' lengths!
public long getContentLength () {
return SourceStream.LENGTH_UNKNOWN;
// Theoretically, this is always false.
public boolean endOfStream () {
return false;
// We don't provide any controls, either.
public Object getControl (String controlName) {
return null;
public Object[] getControls () {
return null;
// Not really... but...
public boolean isRandomAccess () {
return true;
// This only works for the first bits of the stream, while JMF is attempting
// to figure out what the stream is. If it tries to seek after that, bad
// things are going to happen (invalid-mark exception).
public long seek (long where) {
try {
reset();
mark(MAX_MARK);
skip(where);
} catch (IOException ioe) {
ioe.printStackTrace();
return tell();
// Tells where in the stream we are, adjusted for seeks, resets, skips, etc.
public long tell () {
return tellPoint;
void fatalError (String deathKnell) {
System.err.println(":[ Fatal Error ]: - " + deathKnell);
throw new Error(deathKnell);
** end file SeekableInputStream.java **
** begin file StreamingViewerApplet.java **
* This Java Applet will take a streaming video passed to it via the applet
* command in the embedded object and attempt to play it. No fuss, no muss.
* Based on the SimplePlayerApplet from Sun, and uses a modified version of
* jicyshout's (jicyshout.sourceforge.net) tweaks to get JMF to play streams.
* Use it like this:
* 
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.lang.String;
import java.lang.ArrayIndexOutOfBoundsException;
import java.net.URL;
import java.net.MalformedURLException;
import java.net.*;
import java.io.*;
import java.io.IOException;
import java.util.Properties;
import javax.media.*;
import javax.media.protocol.*;
public class StreamingViewerApplet extends Applet implements ControllerListener {
Player player = null;
Component visualComponent = null;
SimpleVideoDataSource dataSource;
URL url;
MediaLocator ml;
Panel panel = null;
int width = 0;
static int DEFAULT_VIDEO_WIDTH = 320;
int height = 0;
static int DEFAULT_VIDEO_HEIGHT = 240;
String readParameter = null;
// Initialize applet, read parameters, create media player.
public void init () {
try {
setLayout(null);
setBackground(Color.white);
panel = new Panel();
panel.setLayout(null);
add(panel);
// Attempt to read width from applet parameters. If not given, use default.
if ((readParameter = getParameter("streamwidth")) == null) {
width = DEFAULT_VIDEO_WIDTH;
} else {
width = Integer.parseInt(readParameter);
// Ditto for height.
if ((readParameter = getParameter("streamheight")) == null) {
height = DEFAULT_VIDEO_HEIGHT;
} else {
height = Integer.parseInt(readParameter);
panel.setBounds(0, 0, width, height);
// Unfortunately, this we can't default.
if ((readParameter = getParameter("stream")) == null) {
fatalError("You must provide a stream parameter!");
try {
url = new URL(readParameter);
ml = new MediaLocator(url);
dataSource = new SimpleVideoDataSource(ml);
} catch (MalformedURLException murle) {
fatalError("Malformed URL Exception: " + murle);
try {
dataSource.connect();
player = Manager.createPlayer(dataSource);
} catch (IOException ioe) {
fatalError("IO Exception: " + ioe);
} catch (NoPlayerException npe) {
fatalError("No Player Exception: " + npe);
if (player != null) {
player.addControllerListener(this);
} else {
fatalError("Failed to init() player!");
} catch (Exception e) {
fatalError("Error opening player. Details: " + e);
// Start stream playback. This function is called the
// first time that the applet runs, and every time the user
// re-enters the page.
public void start () {
try {
if (player != null) {
player.realize();
while (player.getState() != Controller.Realized) {
Thread.sleep(100);
// Crashes... here?
player.start();
} catch (Exception e) {
fatalError("Exception thrown: " + e);
public void stop () {
if (player != null) {
player.stop();
player.deallocate();
} else {
fatalError("stop() called on a null player!");
public void destroy () {
// player.close();
// This controllerUpdate function is defined to implement a ControllerListener
// interface. It will be called whenever there is a media event.
public synchronized void controllerUpdate(ControllerEvent event) {
// If the player is dead, just leave.
if (player == null)
return;
// When the player is Realized, get the visual component and add it to the Applet.
if (event instanceof RealizeCompleteEvent) {
if (visualComponent == null) {
if ((visualComponent = player.getVisualComponent()) != null) {
panel.add(visualComponent);
Dimension videoSize = visualComponent.getPreferredSize();
width = videoSize.width;
height = videoSize.height;
visualComponent.setBounds(0, 0, width, height);
} else if (event instanceof CachingControlEvent) {
// With streaming, this doesn't really matter much, does it?
// Without, a progress bar of some sort would be appropriate.
} else if (event instanceof EndOfMediaEvent) {
// We should never see this... but...
player.stop();
fatalError("EndOfMediaEvent reached for streaming media. ewe ewe tea eff?");
} else if (event instanceof ControllerErrorEvent) {
player = null;
fatalError(((ControllerErrorEvent)event).getMessage());
} else if (event instanceof ControllerClosedEvent) {
panel.removeAll();
void fatalError (String deathKnell) {
System.err.println(":[ Fatal Error ]: - " + deathKnell);
throw new Error(deathKnell);
** end file StreamingViewerApplet.java **
Now, I'm still new to the JMF, so this might be obvious to some of you... but it's exploding on me, and crashing to desktop (both in IE and Firefox) with some very fun errors:
# An unexpected error has been detected by HotSpot Virtual Machine:
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x21217921, pid=3200, tid=3160
# Java VM: Java HotSpot(TM) Client VM (1.5.0_06-b05 mixed mode, sharing)
# Problematic frame:
# C 0x21217921
--------------- T H R E A D ---------------
Current thread (0x058f7280): JavaThread "JMF thread: com.sun.media.amovie.AMController@506411[ com.sun.media.amovie.AMController@506411 ] ( realizeThread)" [_thread_in_native, id=3160]
siginfo: ExceptionCode=0xc0000005, writing address 0x034e6360
(plenty more here, I can post the rest if necessary)
The problem seems to be coming from the "return seekStreams" statement in the first file; when I have execution aborted before that (with a fatalError call), it doesn't crash.
Any tips/hints/suggestions?

You should write your own Applet, where you can easily get the visual component (getVisualComponent())and show it directly in your Applet (you call it "embedded"). As far as I know, all examples (AVReceive* etc.) use the component which opens a new window.
Best regards from Germany,
r.v.

Downloadhelper which video streaming to choose?

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