Calculating position, real course and speed only by hydrophones!

[Shelton]

this is excellent stuff - the problem I have is determining course!! and thanks for that other link as well!! excellent!!

[Pisces]

I asked Mittelwaechter privately to re-upload his video explaining this method. He managed to find the file on an old harddrive. He was lucky to find it again. He thought it was lost due to a systemcrash.

The movie plays by itself, No WMP or other player required. It's an .exe containing the video. It's actually an FRAPS AVI compressed into an .exe by software from Radgame tools (http://www.radgametools.com/)

It plays automatically in 512/384 resolution but you can stretch that by adding " /H1024 /W768" at the end of the filename in a shortcut. It has no sound but the text explains it perfectly. Also, really good quality compared to fuzzy Youtube. But then again. It's a big file: 123 MB

[EDIT: Old rapidshare link died out. I've uploaded it to my Filefront page: MittelWaechter video

[Fincuan]

I hope you don't mind, but I uploaded the instructional video to Vimeo:
http://www.vimeo.com/3064633

The quality is what it is after a couple of conversion steps, but it's still ok. Youtube would be slightly better, but the video is way too long to post there in one piece. Vimeo also allows you to download the original(lower right corner). If someone still has the original .avi give me a shout, since I could re-encode from that and get a massively improved quality compared to what it is now

[Weiss Pinguin]

What exactly is an .mkv file and what do I need to play it?

[Fincuan]

It's a multimedia containter, just like .avi, .wmv or a bunch of other containers, but more versatile. See here: http://en.wikipedia.org/wiki/Matroska. Here's a guide for .mkv playback: http://www.afterdawn.com/guides/arch...o_play_mkv.cfm

Of the free media players I'm familiar with at least Media Player Classic HC and VLC Media player play it out of the box, no additional stuff needed. They both also contain the necessary codecs(H.264 and AAC) for the video and audio in that film. These are really the easiest options, since you won't have to install anything else.

Then again if you can't be bothered with all that just watch the streaming version

[surf_ten]

Hey Thanks Fincuan, it's great that this video is now up on a public video site. I had Mittlewaechter video on my laptop but an updated verison of Norton AV removed it as a virus. I had great success using Mittlewaecther's method and point anyone interested in using passive sonar to his original thread. The video demonstrates exactly how to use his method. My thanks to Pisces also was maintaining a link to his original bink video. I downloaded it last night.

[Mittelwaechter]

Here is a rapidshare link to the original file:

http://rapidshare.de/files/44679804/...oHunt.exe.html

It's an EXE because a WMV file would have been a ~320 MB file and I tried to keep it as small as possible. I used the Bink Video Codec from RAD Game Tools - a free game development standard - to compress the file to ~123 MB. Check your different games files and you'll certainly find more BIK movie files (i.e. Intros) from RAD Game. I added the BinkPlayer to ensure everybody can play the tutorial - and therefore it's an EXE.

You can pause the clip with space bar and exit with ESC, but there is no FWD or BWD. If you want to decode it back to a WMV file, download the RAD Game Tools and simply convert it back. It will blow up to ~320MB again, but you can handle it as usual. I didn't record any audio.The filesize - you know...

I don't know why the new Norton Anti Virus Software detected a virus,but I don't know either, what happened to the file since my first upload some time ago.

Well, here we have again the original file without any virus!

MD5 checksum: 51FD9E1859D2B18410BC919F106BFA3B

What's that? -> http://www.diamondcs.com.au/freeutilities/md5.php
(free, small, no installation required and extremly useful)


Enjoy!

[Pisces]

Originally Posted by Mittelwaechter

I don't know why the new Norton Anti Virus Software detected a virus,but I don't know either, what happened to the file since my first upload some time ago.

Well, here we have again the original file without any virus!

MD5 checksum: 51FD9E1859D2B18410BC919F106BFA3B

What's that? -> http://www.diamondcs.com.au/freeutilities/md5.php
(free, small, no installation required and extremly useful)


Enjoy!

Who knows. Might have been a "false positive" warning.

I think I used the Radgame tools to change the default viewing settings to stretch fullscreen. That means the file was saved differently so Mittelwaechter's MD5 checksum won't match for the file I uploaded. I'm sorry for this added uncertainty of it's integrity but I didn't expect at the time I would reupload it. I checked it again just now with AVG virus database 270.10.17/1934. Nothing wrong with it.

[Mittelwaechter]

Hi Pisces,

your idea to modify the resolution settings of the EXE player is formidable. The size of the file should stay the same, but the clip would be shown in lager format. Some people did indeed complain about the small screen.

I'll try to compile the original EXE again, to make it switch your screensettings to some "recognisable" size.

[Fincuan]

I would recommend distributing it as a normal video file and not an .exe, since a) it can only be played with the RAD player and b) the player isn't very good.

[Mittelwaechter]

Well, there is a significant difference in up- and downloading of a 123 MB file and a 320 MB file. The RAD Game Tools is a 1.25 MB download and you can extract the regular video file anytime you want.

Let's say it's like to be zipped. You can use it as it is or you have to use a program to "unzip" the file. It's on you to decide what to do.
Rest assured, both of my original files are free of any malware.

Here is the original 123 MB file - but now the included player switches your screensetting to show the clip. For those who 'couln't see anything', it's a little bit bigger now!

http://rapidshare.de/files/44734341/...ntBIG.exe.html

MD5 815F02F65BB837EE7CDEC6BBD3279E41

Have fun!

[Fincuan]

The thing is, each conversion step eats quality unless lossless codecs(which Bink isn't as far as I know) are used.
Like this:

• The original FRAPS .avi is very good quality, but also very big. You edit the video and enocode it to .wmv -> the size gets a lot smaller, but you lose some quality.
• Then you "Bink it" with RAD game tools -> the size again gets smaller, and again you lose quality.
  
• Then you want it back to .wmv -> You unpack it with RAD game tools. Size gets bigger but the quality lost in previous step cannot be returned.

Nice job with the tutorial btw

[Mittelwaechter]

Of course you are right Fincuan. And here is a gift for you.

I did an AVI for you - it's only 56 MB now - using the RAD Game Tool to extract the clip from the EXE and encode it again with MPEG4V2. So let's not talk about quality, but you have an AVI to zoom, fullscreen, FWD, jump or do whatever you want to.



http://rapidshare.de/files/44743198/...oHunt.avi.html

MD5 D1661D8749333AB5C523440638FA3374

[Fincuan]

Lol thanks, I'll take a look

I'm afraid I already did the same thing though, check the Vimeo vid a few posts back. It's an .mkv with H.264 video.

[Pisces]

Originally Posted by Fincuan

I would recommend distributing it as a normal video file and not an .exe, since a) it can only be played with the RAD player and b) the player isn't very good.

a) That is not correct. The exe works by itself. You do not need to download the tool to play it. Only to change settings if you want like I did then. I just mentioned the makers of the Bink/Smacker software to allow people to make up for them selves if this weird .exe really is a movie and not something nasty in disguise.

b) I don't know what you were seeing on your screen as you were watching that vimeo link you provided but I thought the file I uploaded had alot more sharper lines displayed (you know the faint grey drawn lines as you release the drawing tools). My screen is only 1024x768. I think that vimeo site or whatever made it's quality worse. But that's just my two cents.