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13

OK then ffcast -s ffmpeg -r 15 -- -pix_fmt rgb24 out.gif I selected a region, did some vim, pressed q, got a .gif. (I ran that command in another terminal.) What happened? FFcast helps the user interactively select a screen region and hands over the geometry to an external command, such as FFmpeg, for screen recording. ffcast is the glorious ...


9

take a look at this: http://askubuntu.com/questions/107726/how-to-create-animated-gif-images-of-a-screencast/107735#107735 ..... After the Desktop Recorder has saved the recording into an OGV video, MPlayer will be used to capture JPEG screenshots, saving them into the 'output' directory. On a terminal: mplayer -ao null <video file name> -vo ...


9

If you are running Arch Linux I suppose you know how to install a rubygem. Take a look at https://rubygems.org/gems/airstream - a simple command-line-tool you can use to send remote and local image and video files to your apple-tv (tested with generation 3). If you need any help leave a comment on http://blog.lipautz.org/linux-and-apple-tv/.


8

The only way to do everything you ask is to rip a disk image of the DVD and then play the image. Any other process which doesn't preserve the exact format of the disk will likely remove one or more of the features you're after because DVD is a very specific variant of the MPEG-2 standard. DVD player programs — which you still have to use to interpret ...


8

This is pretty trivially done, since .srt files are just text files that contain time stamps -- all you need to do is add the length of cd1.avi to the times of all the subtitles in cd2.srt. You can find the length of cd1.avi with ffmpeg: ffmpeg -i cd1.avi # Look for the Duration: line And then add that to cd2.srt using srttool srttool -d 12345 -i ...


8

If I understood you correctly, you want one animated gif that looks like 5 animated gifs playing in parallel, right? Imagemagick can do that (and much more). Probably even in one line of code, but I'll do it in several steps. Lets assume your gifs are called anim1.gif…anim5.gif and are each 100x100 pixels. #Combine anim1.gif and anim2.gif (first row) ...


7

For sure. Here are two suggestions: Behind the scenes CLI. Use V4L2VD to create a virtual video device such as /dev/videoVirt1 and pipe through mplayer for the effects. Even some similar examples in the notes. Use a fat desktop program such as webcamstudio to create the pipes and do your skype/broadcast wonders - still with mplayer for the ascii effect ...


6

Newer kernels use KMS by default, so you should move away from appending vga= to your grub line as it will conflict with the native resolution of KMS. However, it depends upon the video driver you are using: the proprietary Nvidia driver doesn't support KMS[1], but you can work around it. You should be able to get full resolution in the framebuffer by ...


6

According to X.org, the radeon driver is generally preferred over the radeonhd driver. This table says that you have an Evergreen chip. (That page also shows what features are implemented in the radeon driver for your chipset.)


5

There is software recordMyDesktop http://recordmydesktop.sourceforge.net/about.php which you can record any part of you screen you want. I use it to record my skype sessions. sudo apt-get install recordmydesktop to install it from main channels.


5

See this answer. Quoted below for convenience: Calculate the bitrate you need by dividing 1 GB by the video length in seconds. So, for a video of length 16:40 (1000 seconds), use a bitrate of 1000000 bytes/sec: ffmpeg -i input.mp4 -b 1000000 output.mp4 Additional options that might be worth considering is setting the Constant Rate Factor, which ...


5

If you're looking for opensource professional level software unfortunately currently there is nothing like that. We're all waiting for lightworks gnu/linux port. It'll be opensource. They announced about public beta 3 months ago, but still nothing was published. Hope it'll be available soon. However, there are some a little bit amateur level software: ...


4

Without experience with screencasts, this is the way to search the repository for keywords like this: apt-cache search screencast byzanz - Small screencast creator gtk-recordmydesktop - Graphical frontend for recordmydesktop istanbul - Desktop session recorder producing Ogg Theora video The result is from xUbuntu 9.10 - your result may vary; give it a ...


4

Since you want an answer "without installing any extra applications like Photobooth," I've tried to give a solution that doesn't depend on very much. Also I'm assuming that your webcam uses "Video4Linux2" and that it is /dev/video0. If this is a modern webcam and if you only have one, these are pretty good assumptions. From the command line: $ ...


4

The video output drivers compiled into your version of mplayer can be viewed by running mplayer -vo help As to which you should pick when, some of that will be obvious from the help output (for those that target specific video cards[ mga, s3fb, etc], or output formats [aa, png, etc]). Some are obsolete (I don't think VIDIX went anywhere, or GGI). The ...


4

They're APIs. "x11" is raw bit-blitting (old and slow, almost never what you want to use barring bugs in the other APIs); "xv" is the X Video extension (most cross-hardware compatible); "vdpau" is Video Decode and Presentation API for Unix (nVidia-only).


4

If Kernel Mode Setting (KMS) is inhibiting your graphics card from working properly, you can disable it by appending radeon.modeset=0 to the grub line. If that fails, try a simple nomodeset. For more information about running an ATI card under Arch, see the ATI page on the Arch wiki.


4

I'm not sure you are going to get the results you want from a test program. I've worked at a company that produced consumer electronics and the test facility there had several environmental units that would simulate scenarios like this that would cause failures. One was just a simple box with a heating element that would allow you to put electronics in it ...


4

Yes, you can extract the url from the HTML-source and use mplayer: $ mplayer -ao pulse mms://proedvid.stanford.edu/videocontent/knuth/musings/981203/981203-knuth-500.wmv The playback (audio/video) works fine on a Ubuntu 11.04 system. You can automate this a bit, e.g. via: $ curl -s -S ...


4

Did you see this message when you ran glxgears? Running synchronized to the vertical refresh. The framerate should be approximately the same as the monitor refresh rate. If so, then that would likely explain the framerate of 60, which is probably your monitor's refresh rate. If not, the standard warning applies: glxgears shouldn't be used as a means of ...


4

Pull out the image captures (these are 100 pixels tall, and keep aspect ratio), the rate (-r) is per-second (this yields one frame every ~5 minutes), this also adds time stamp to output image. ffmpeg -i MOVIE.mp4 -r 0.0033 -vf scale=-1:120 -vcodec png capture-%002d.png Then use ImageMagick to build your gallery image: montage -title "Movie ...


4

I suggest you autocreate /dev symlinks using udev, using unique properties (serial number? port number?) of your USB cameras. See this (should apply to Arch as well) tutorial about udev rules. Or maybe this tutorial is clearer. You can get the list of properties for your devices using: sudo udevadm info --query=all --name=/dev/video1 then sudo udevadm ...


4

You might want to install the package mplayer-resumer. This will allow you to resume a video from where you left off. When you're done watching the videos using this wrapper script, you can then safely delete them. $ mplayer-resumer options path/to/file Automatic resuming from where you left off - tips tricks mplayer-resumer on github excerpt from main ...


4

There are several Intel drivers options which, if they don't work perfectly with your hardware, can cause issues like this: The big one is lvds_downclock, but it defaults to off. If you've changed that default, that's the first one to try. (It's possible some kernel versions defaulted to on, so its worth a try to force-disable it). i915_enable_fbc can ...


3

UPDATE-2: After submitting the following script, it dawned on me that another way to set up time positions (in a GUI) is to use a Subtitles Editor (eg. gnome-subtitles). You can just click to mark start and end positions of "phantom subtitles"; actually you can put your file-path and comments in as the "subtitle"... Some formats aren't suitable (eg. using ...


3

Maybe I'm getting the question wrong, since English is not my first language, but wouldn't it be better if you edited the video with a tool like Kino instead of making a playlist like that? You can adjust the starting and stopping times as you want, and I don't think it would be that difficult.


3

VLC has a built-in desktop stream. I don't recall if it does audio too, howerver. If you need something quick you can try Big Blue Button's VMware image. It sets up a server that can stream desktop, video, audio, and whiteboard.


3

Here's another v4l2 loopback driver that I was able to get working with Skype. v4l2loopback driver Then you can use Gstreamer to setup to pipeline. apt-get install gstreamer-tools gst-launch -v v4l2src ! gstreamfiltershere ! v4l2sink device=/dev/video1


3

I've read about using ffmpeg for screengrabbing before. Check out ffmpeg with X11 grabbing + ffserver. There may be some progressive deterioration in A/V syncing though.


3

Something like: dd if=/dev/video0 | mplayer tv://device=/dev/stdin works for me (SOA#1) locally. So does: ssh localhost dd if=/dev/video0 | mplayer tv://device=/dev/stdin As well as mkfifo test dd if=/dev/video0 of=test & mplayer tv://device=test Hence: Try without named pipe Check bandwidth Also - how does in not work (display black screen, ...



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