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  • What would cause my SendMail server not to acknowledge receiving a TCP Sequence?

    - by Mike B
    My TCP/IP Stack knowledge is a little rusty so please bear with me.... I have a CentOS 5.7 server with SendMail and am having seeing intermittent timeout issues sending email (particularly larger email) to other remote domains. It doesn't happen with all attachments or recipient domains. Just some. After some extended troubleshooting, I think I've narrowed it down to TCP Sequences not being acknowledged. Here's a breakdown of the TCP session from a packet capture I collected directly on my MTA (fooMTA): Packet 1 - 11: Standard TCP handshake followed by initial SMTP conversation. No errors. Packet #12 Recipient MTA: TCP sequence 231. Ack 91. Packet #13 FooMTA: TCP sequence 91. Ack 305. Packet #14 FooMTA: TCP sequence 1115. Ack 305. Packet #15 Recipient MTA: TCP sequence 305. Ack 2495. Packet #16 FooMTA: TCP sequence 2495. Ack 305. Packet #17 FooMTA: TCP sequence 5255. Ack 305. Packet #18: Recipient MTA: TCP sequence 305. Ack 5255. Packet #19: FooMTA: TCP sequence 6635. Ack 305. Packet #20: FooMTA: TCP sequence 8015. Ack 305. Packet #21: Recipient MTA: TCP Sequence 305. Ack 8015. Packet #22: FooMTA: TCP Sequence 10775. Ack 305. Packet #23: FooMTA: TCP Sequence 13535. Ack 305. Packet #24: Recipient MTA: TCP sequence 305. Ack 10775 Packet #25: FooMTA: TCP Sequence 14915. Ack 305 It keeps going like this with my server still thinking it hasn’t received sequence 305… in response the remote side eventually retransmits its prior data thinking that it never arrived. Eventually the gap gets so large that no new data is sent and the remote MTA keeps retransmitting old stuff. This contributes to an exponential backoff and eventually the remote side gives up. What’s strange to me is that I see the “missing” TCP sequence (305 in this case) arriving back to my server (via a packet capture collected directly from fooMTA) So I don’t get why my server keeps asking for it. Could this be firewall related? What would be the next step in troubleshooting?

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  • transform a trapezium into a rectangle

    - by Phuong Nguyen
    I use my iPhone to capture a painting. However, the angle was not perfect, so instead of getting a straight rectangle, I get a trapezium. However, I want to transform this trapezium back into a rectangle (using some affine transformation). However, I cannot find a good way to do it. Please advice.

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  • pam_tty_audit and non privileged users

    - by Jeff
    I'm working on a cents 6.3 box and am trying to log all commands executed from a bash shell and came across pam_tty_audit. I've added the appropriate line to my /etc/pam.d/system-auth file: "session required pam_tty_audit.so enable=*" The problem is that it does not appear to capture commands unless a user is root. For example, if i ssh in as root it logs everything to the audit log, but if I ssh as a regular user it does not start logging anything until after I have su to root. Any ideas?

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  • redirect get URL?

    - by Wolfr
    I'm almost done writing the .htaccess file to redirect some URLs to a new domain. One final thing: I have URLs with this structure: http://www.domain.be/?s=searchterm How do I capture them? RewriteRule ^\?s=(.*)$ http://newsubdomain.domain.be/?s=$1 [NC,L] Any ideas?

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  • How to know when the MPMoviePlayerController has been paused in iPhone?

    - by iPhoney
    I want to add an overlay view for my video when the video is paused by the user. Is there any way to get the pause notification from MPMoviePlayerController? According to Apple Doc, there should be ways to do this but I can't find which notification should I use for this purpose. Quote: In addition to being notified when playback finishes, interested clients can be notified in the following situations: -When the movie player begins playing, is paused, or begins seeking forward ... For more information, see the Notifications section in this reference.

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  • Alternate Out of Order TCP Packets problem

    - by Sunil
    I am having a network of windows and embedded nodes connected on a series of cisco switch. I have been seeing some serious network problems from few days. Used wireshark to capture the network trace and see every alternate tcp packets being marked as "out of order". Any pointers on how to troubleshoot this problem?

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  • PC reboots spontaenously: debugging tips [closed]

    - by aaron
    I swapped my core 2 duo for a quad core recently, and generally things run fine, but every now and then my computer just restarts. I don't even get a blue screen (Vista 32). Core temp isn't a problem. My thinking is that my power supply is inadequate, but I haven't been able to test that (one idea was to under clock the cpu to see if that helped, but going up in speed was the only simple thing to do in the BIOS) Two cases where I semi-consistanly get problems: - Borderlands windowed after some period of time (and some other games, but Borderlands does it pretty regularly) - watching a video (e.g. quicktime/vlc) and having another video running Another thought is non-cpu heat? Maybe the graphics card? Any thoughts on how to track this down appreciated. Thanks!

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  • Creating reference movies for iPhone on the fly

    - by Mad Oxyn
    We are working on an online mobile video app. The videos we want to play on mobile phones are being generated by a server, as there can be dynamic content in the server (based on user input). Now for iPhone we would like to play the video in the best possible resolution based on the connection speed at the time of downloading the movie. This can be done using reference movies. However, because our videos are being generated on the fly, we need to generate this reference movie on the fly as well. Is there a way to generate reference movies on the fly on a Linux server using some command line tool, PHP or Java? Or on a DOS server maybe? Any help will be much appreciated.

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  • model (3ds) stats & snapshot in linux

    - by acidzombie24
    I want to write an app that takes in a model filename via cmd line, create a list of stats (poly count, scaling, as much as possible or maybe the stats that i would like) and to load the model with its textures (with anything else) and draw it from multiple position to save the images as pngs. How would i do this? are there utils i can use to extract data from models? how about drawing the models? my server does not have a desktop or video card, would no video HW be a problem?

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  • Can anyone tell me whats wrong with this htaccess code

    - by mathew
    I am not able to get through with this code...I need to capture the request but with this code I am able to redirect but it cannot find the particular search page. RewriteCond %{THE_REQUEST} ^[A-Z]+\ /searcha\.php\?name=(www\.)?([^/\ ]+)[^\ ]*\ HTTP/ RewriteRule ^.*$ http://www.mydomain.com/%2? [R=301,L] can any one tell me what is I am missing??

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  • FACEBOOK LINTER ERROR: value for property 'og:image:url' could not be parsed as type 'url'

    - by Martin Devarda
    I've read all threads in stack overflow about this issue, but my problem persists. THE PROBLEM IS ON THIS PAGE: http://www.organirama.it/minisite-demo/001.html THE PAGE CONTAINS THIS TAGS <meta property="og:title" content="A wonderful page" /> <meta property="og:type" content="video.movie" /> <meta property="og:url" content="http://www.organirama.com/minisite-demo/001.html" /> <meta property="og:image" content="http:/www.organirama.com/minisite-demo/photos-small/001.png" /> <meta property="og:site_name" content="Organirama"/> <meta property="fb:admins" content="1468447924"/> LINTER ERROR Object at URL 'http://www.organirama.com/minisite-demo/001.html' of type 'video.movie' is invalid because the given value 'http:/www.organirama.com/minisite-demo/photos-small/001.png' for property 'og:image:url' could not be parsed as type 'url'. WHAT I DISCOVERED The problem seems somehow related to the domain. Infact, if I make og:image point to another image on another domain, everything works.

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  • MPMoviePlayerController iPhone 3G & .mov file format

    - by Matt
    Just posting a question to the world... My app is currently setup to play video files. The app is setup to play .mov files and when tested on a 3GS, iPhone 4, and an iPad, it works great. But when playing on an iPhone 3G, the file does not play. Is this based on different compression standards that the 3G can't handle? I liked the .mov extension as it was compressed nicely to stream to the device. I have now converted the video files to .m4v so it will play on the 3G, but the file is now 3 times the size. Thanks in advance for any answers I get!!

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  • Redirect window of command line tool to your app (Windows)

    - by dribler
    Hello, is there a way (on Windows XP+) to redirect the output of a window created by a process created with e.g. CreateProcess to a window of your own program? I'd like to make a nicer GUI for ffplay.exe which is an open source video player. It is a command line tool, which opens a simple window in which it plays back the video. Can I "capture" this window and display the output in my own program somehow? Thanks for any hints you can provide.

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  • Is it possible to reference a file stored in Isolated Storage by its URI?

    - by Joel
    Using this previous question as motivation, I would like to temporarily store images and videos in Isolated Storage. My application (written in WPF/C#) will allow a user to review these temporarily stored items by viewing their contents in a MediaElement. I was hoping to set the MediaElement's Source Property to a video or image's URI stored in IsolatedStorage but I cannot figure out how to dynamically create a URI since it doesn't appear to be naively supported by IsolatedStorage. Any help would be greatly appreciated - thank you in advance! Update - 1/21/09 After battling the issue for a day, I concluded that the Isolated Storage approach is not practical for storing large video files that need to be referenced by a Uri.

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  • iPhone SDK: Downloading large files from a server into the app bundle.

    - by Jessica
    Hi, I am building an app that plays multiple video files, But I would like to know How do you download a video file (100mb - 300mb) from a server into the application's bundle so it can later be locally referred to in code? The reason I want this type of a set up in my app is that I don't want the app binary to be made unnecessarily large due to including videos some users may not want. Also does this violate any of apple's terms? Also would it be simple to implement a progress view with this kind of set up and if so how? Any help is appreciated.

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  • How to use process monitor to view or log a windows login?

    - by leeand00
    We're having some issues with Windows 7 Roaming profiles and I was reading here that the login process can be monitored using process monitor. "There are a couple of ways to configure Process Monitor to record logon operations: one is to use Sysinternals PsExec to launch it in the session 0 so that it survives the logoff and subsequent logon and another is to use the boot logging feature to capture activity from early in the boot, including the logon." How does one do either of these options using process monitor to find out what is happening during a user login?

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  • MySQL COUNT() multiple columns

    - by liam
    Hello, I'm trying to fetch the most popular tags from all videos in my database (ignoring blank tags). I also need the 'flv' for each tag. I have this working as I want if each video has one tag: SELECT tag_1, flv, COUNT(tag_1) AS tagcount FROM videos WHERE NOT tag_1='' GROUP BY tag_1 ORDER BY tagcount DESC LIMIT 0, 10 However in my database, each video is allowed three tags - tag_1, tag_2 and tag_3. Is there a way to get the most popular tags reading from multiple columns? The record structure is: +-----------------+--------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-----------------+--------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | flv | varchar(150) | YES | | NULL | | | tag_1 | varchar(75) | YES | | NULL | | | tag_2 | varchar(75) | YES | | NULL | | | tag_3 | varchar(75) | YES | | NULL | | +-----------------+--------------+------+-----+---------+----------------+

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  • create a model in create action from a class

    - by Pontek
    As a newbie to rails I can't find how to solve my issue ^^ I want to create a VideoPost from a form with a text field containing a video url (like youtube) I'm getting information on the video thanks to the gem https://github.com/thibaudgg/video_info And I want to save thoses information using a model of mine (VideoInformation). But I don't know how the create process should work. Thanks for any help ! I'm trying to create a VideoPost in VideoPostsController like this : def create video_info = VideoInfo.new(params[:video_url]) video_information = VideoInformation.create(video_info) #undefined method `stringify_keys' for #<Youtube:0x00000006a24120> if video_information.save @video_post = current_user.video_posts.build(video_information) end end My VideoPost model : # Table name: video_posts # # id :integer not null, primary key # user_id :integer # video_information_id :integer # created_at :datetime not null # updated_at :datetime not null My VideoInformation model (which got same attributes name than VideoInfo gem) : # Table name: video_informations # # id :integer not null, primary key # title :string(255) # description :text # keywords :text # duration :integer # video_url :string(255) # thumbnail_small :string(255) # thumbnail_large :string(255) # created_at :datetime not null # updated_at :datetime not null

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  • Indexing an image in-between already made content

    - by Christophersson
    I have a pre-code page coded as follows: <div id="linearBg"> <div id="wrapper"> <div class="logo"></div> <div class="navigation"></div> <div class="video"></div> <div class="content"></div> </div> </div> Where linearBg is a gradient background, the back board of the website. Wrapper is the container for the inner div's, and the rest are content oriented. So i've already implemented this with styles and all sorts, but the thing is I want to add: <div class="watermark"></div> underneath/behind both the content and video div, sort of like a reverse watermark, I've tried z-indexing but i'm not an expert. Could you guide me on to do make this possible? Thanks in advance

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