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Volomike
Asked: 2012-06-14 00:38:54 +0800 CST

How do I reduce the screen and file size of a recorded video, plus convert to FLV?

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I have used gtk-recordMyDesktop to make a video as an OGV file using the default settings. I need to do 3 things:

  1. How can I reduce the screen resolution (height and width) so that it can fit into a smaller video size on my website?

  2. How can I pull out like every third frame so that the file size is not so large, yet not mess up the sound?

  3. Not all Windows IE users can view OGV files. How can I convert to FLV (or, as a fallback, MP4) so that I can share on my blog?

mp4

2 Answers

  1. Best Answer

    You can resize and convert with ffmpeg using ffmpeg -i input.ogv -s widthxheight -sameq output.flv.
    You can also change the video bit rate with -b:v bitarate and control the frame rate with -r framerate to reduce the size of outcome. As izx has mentioned the bit rate option is recommended over changing frame rate or dropping frames.

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  2. You can use Avidemux

    Avidemux is a free video editor used mainly for simple cutting, filtering and encoding tasks. It is often dubbed as the VirtualDub for Linux as it can do many things that VirtualDub can do. It supports many files types, including avi, DVD compatible mpeg files, mp4, asf and even the not-so-common ogm and matroska format.

    Some of the useful features of Avidemux include a simple WYSIWYG interface, easy conversion from one format to another, plenty of filtering effects and a built-in subtitles processing capabilities.

    Source: USC

    You can also use Pitivi Video Editor

    Adding a Screencast / Video Clip into Pitivi

    In order to add video clips into your Pitivi project, simply click on IMPORT CLIPS and select the appropriate video file. Note: video file clips can also relate to screen-casts created with gtk-recordmydesktop. The Pitivi video editor accepts many different video clip file formats.

    Examples of Accepted File Formats:

    • MPEG
    • AVI
    • MP4
    • OGV (Ogg Theora Vorbis)

    Source: http://zenit.senecac.on.ca/wiki/index.php/Using_Pitivi_Non-Linear_Video_Editor

    To add the video clip into the project area, simply click and drag the object into the area below the Timeline Ruler. Quoted from this site

    After you import the file, add it to the timeline, and do your editing, click on the render button, and it will allow you to save the file as .flv. enter image description here

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