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Django on Twisted Web2

Posted on July 14th, 2008 in Uncategorized |

Django is
Django is a web framework created from Python. Currently, both the Chameleo website and user community site are based on Django. One of the reasons that Django is loved by many web developers is that it enables them to produce web application quickly and easily. Django helps developers simplify the content that is needed to make web applications, such as data base modeling, SQL and html.

Django on Apache
Many Django applications generally function on the Apache Web Server. Django provides a simple, independent application environment, but for a production environment that requires a better function, a professional web server such as Apache is needed. The Django website explains methods on how to use the framework on different web servers including Apache and Light HTTP. In addition to these web servers, developers can also run Django through Twisted Web, which is a network framework that uses WSGI.

Django on Twisted Web2
Running Django on Twisted Web is quite simple. Select WsgiHandler in Django as a web resource of Twisted Web2. The use of Django + Twisted Web2 has various strong points. Since it is possible to work on Request before going through Django’s middleware, you can block certain IPs or manipulate the Request Header through Runtime. You can also use deferred methods in Twisted. Perhaps the most outstanding point in the use of the Django + Twisted Web2 combination is that it is lighter than Apache and enables you to run a web server purely through Python.

Of course at first, I wondered if running Django on Twisted Web2 could endure the traffic of real fields, but after initializing the application, the resulting reaction speed was quite satisfactory after removing the cache. Now may be the time to think about running Django on Twisted Web2 as an alternative to Apache.

Reference
* Django on Twisted, http://code.google.com/p/django-on-twisted/

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Chameleo 0.2.0.0 release

Posted on June 30th, 2008 in Uncategorized |

The Chameleo team is proud to announce a new release of the Chameleo media framework.

Changes since 0.1.4.0

* Remove PyGtk dependency and use PyGlet instead.
* Show loading image.
* Skip frames when CPU is overloaded.

More information about Chameleo is available at

http://www.chameleo.org

You can download the Chameleo Windows Installer at

http://www.chameleo.org/download/latest/

You can download Chameleo source code at

http://dev.chameleo.org/dev/wiki/wiki/Download

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OpenCV and Chameleo

Posted on June 23rd, 2008 in Uncategorized |

OpenCV is an Open Source Project supported by Intel, that mainly provides video-related library. OpenCV’s primary functions include Face Recognition, Edge Recognition, and Motion Recognition. Since this program supports the Python binding function using SWIG, it enables manipulation through Python language. So far, only video or image files and web cams have been analyzed using OpenCV functions.

By using Chameleo in conjunction with OpenCV, it is also possible to create widgets which enable face recognition while watching videos. Currently, Chameleo allows users to utilize the concerned frame for widgets as raw data in the form of BGRA, whenever a new frame appears. Thus, if using BGRA for inputting OpenCV, it is possible to recognize faces simultaneously.

However, since Python Binding does not yet support BGRA format, a small amount of patching is in order. This patching can easily be done by slightly revising the C++ codes using a CreateImage function, so that it supports BGRA format.

Using these functions, it will become possible to identify and extract faces or patterns from videos. It is also possible to recognize motions within the video as well, using DimP (Direct Manipulation Video Player).

Sphinx Project provides Gstreamer plugins that allow Gstreamer and voice recognition functions to function in tandem. The Sphinx Project is also is possible through Chameleo widgets.

Various widgets are on the way so that users can utilize the diverse functions of OpenCV on Chameleo

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Easy Seeking Function

Posted on June 8th, 2008 in Uncategorized |

Seeking is one of the controls most often used by video player users. Seeking is a basic function that allows the user to begin or resume playback from any spot in the video he or she wants, using a slider. The Chameleo team has been adding to the slider method, and various ideas are being tested that allow users to search more easily and accurately.

The first picture shows the Seeking method that utilizes Chameleo’s timeline slider. It provides methods that enable the user to preview scenes on the timeline s/he would like to move to. Since s/he can preview upcoming scenes, the user can easily move to a desired point in the video.

The second picture displays the seeking idea using bookmarks. The user can drag and drop the scene s/he has been watching to the bookmark list, which automatically bookmarks the scene. When the user clicks on the bookmark snap shot, playback resumes at that point in the video. This function is helpful for users who want to replay a previous scene or move to a certain scene.

Many other ideas are being experimented with using the Chameleo platform. This is because Chameleo is a media platform that enables anyone to participate and create his or her own player, if s/he has a little bit of programming expertise and ideas. To anyone who wants to create their own video player, we encourage you to participate in this project.

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Chameleo 0.1.4.0 release

Posted on June 2nd, 2008 in Uncategorized |

The Chameleo team is proud to announce a new release of the Chameleo media framework.

Changes since 0.1.3.1

#195: Add a tooltip method to Actor to show a little text on hover
#230: Create a build script
#246: Use XviD gst-plugin instead of ffdec_mpeg4
#248: Add tooltips to S, W buttons
#249: Add tooltips to WindowDecorator buttons
#250: Add tooltips perspective buttons
#251: Rename libeay32.dll to prevent conflicts
#244: Use the flvdemux plugin instead of ffdemux_flv
#278: Add UGC channels such as YouTube

More information about Chameleo is available at

http://www.chameleo.org

You can download the Chameleo Windows Installer at

http://www.chameleo.org/download/latest/

You can download Chameleo source code at

http://dev.chameleo.org/dev/wiki/wiki/Download

Linux users can build Chameleo from source code. We will provide binary packages for Linux soon.

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PlayList Plugin

Posted on June 2nd, 2008 in Uncategorized |

Most TV dramas these days are shown in a series format. Korean dramas usually have up to 10 episodes per series and some well known Japanese animation TV shows have over 100 episodes.
If you are watching a series on your PC, it could be a hassle to manually load the next episode and play every time you are finished watching the previous show. This is especially true for someone like me who likes to lie down on the couch to watch, using a remote control! Also, there are times when you may not remember which episodes you have watched. In order to resolve these problems, our Chameleo developers have added a plugin called PlayList. As PlayList has just been released, there may be some issues we need to improve, but here are some functions that have been realized so far:
1. Once a video is played, other videos that have the same file extension within the concerning directory will be listed up according to file names and managed in PlayList. So when the current video ends, the next video automatically plays.
2. Using the PageUp and PageDown keys, users can play the current, previous, or next episode directly.

Future functions to be added include:
1. Automatically changing all video file names at once within the same directory
2. Keeping a record of the point in the direct to which the user has watched
3. Registering reference directory

Keep checking back for the next version of our PlayList Plugin!

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Open Access

Posted on May 26th, 2008 in Uncategorized |

Many scholars attempt to spread their message as easily and to as many people as possible. That is why many of them go on TV or publicize books in order to more closely communicate with the public and to popularize their ideas. Of course, many scholars and researchers still desire what they’ve achieved to be connected to commercial profits. Research papers produced by universities are generally only consumed by a very limited number of readers within academic circles. The majority of papers that are not included in the transactional activities slowly disappear. However, the pattern of knowledge consumption is changing through the use of the Internet. The ‘Open Access’ movement is to freely share this closed knowledge.
On February 12, 2008, Harvard undergraduates were asked to answer a question: ‘Should there be a charge for the use of papers and theses or should they be freely available?’
The students voted for free access. According to the students, papers are not just for limited readers of academic journals, but assets to be shared with the people who need them. Unless there is a specific request made by the copyrighter, academic papers will be freely available on the Internet. Of course, copyrighters are open charge for their work or to distribute it for free. (Please refer to http://chronicle.com/news/article/3943/harvard-faculty-adopts-open-access-requirement) Open Access is a new opportunity for both knowledge consumers and producers. By sharing academic information freely, valuable knowledge will no longer run the risk of being buried due to cost issues. ‘Open lecture’ being proceeded in foreign universities is similar to ‘Open Access’ in that it grants free access to academic knowledge. MIT in the U.S. began disclosing their open courseware from 2001 and opened major lectures online for free applying CCL(Create Common License). Yale also initiated their ‘open Yale course’ project where users can download audio, video, and PDF files of lectures online. Berkeley is also showing syllabi per semester in the form of pod casting on their website. (Refer to http://ocw.mit.edu/OcwWeb/web/home/home/index.htm and Open Yale courses at http://open.yale.edu/courses/index.html) This free sharing of information may be considered to be an invasion of vested rights of universities and publishers. However, in the long run, this free access to information will help us pursue greater knowledge, and an increase in the flow of free information will only be a benefit.

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Chameleo 0.1.3.1 release

Posted on May 19th, 2008 in Uncategorized |

The Chameleo team is proud to announce a new release of the Chameleo media framework.

This is a minor release fixing bugs in Chameleo 0.1.3.0

Changes since 0.1.3.0

* Windows updater bugs are fixed
* Windows Media 9 codec is added

More information about Chameleo is available at

http://www.chameleo.org

You can download the Chameleo Windows Installer at

http://www.chameleo.org/download/latest/

You can download Chameleo source code at

http://dev.chameleo.org/dev/wiki/wiki/Download

Linux users can build Chameleo from source code. We will provide binary packages for Linux soon.

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Chameleo 0.1.3.0 release

Posted on May 17th, 2008 in Uncategorized |

The Chameleo team is proud to announce a new release of the Chameleo media framework.

Changes since 0.1.2.0

* Windows installer size is reduced to 19MB.
* Linux port is added.
* DTS Audio codec is added.
* AAC Audio codec is added.
* Video inspector is added.
( The inspector shows an error message when a non-video file is drag-and-dropped. )
* Capture plugin is refactored.
* Chameleo channel is added in the FileChooser plugin.

More information about Chameleo is available at

http://www.chameleo.org

The next version of Chameleo will be available on May 30th, 2008.

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NEWS: Chameleo Linux Port Will be Available Soon!

Posted on May 17th, 2008 in Uncategorized |

One of the main goals of the Chameleo team is to be able to run the player on all major platforms, which are Windows, Linux and Mac OS X. At the moment we have been providing only the Windows installer and bare source code, so Linux and Mac users couldn’t use Chameleo easily.

There is good news now. This Friday, Chameleo Linux will be released Chameleo. It includes source code and Linux library dependencies. Deb and RPM packages will also be provided next week. We will announce news of this release to major open source communities such as GStreamer and Totem because we share the same infrastructures and we have numerous opportunities for cooperation.

For Mac users, Mac OS X port is under active development and it will be released in late June.
For Windows users, we have greatly reduced the size of the installer to 19MB, so it can be downloaded and installed quickly. The first goal of this release was to reduce CPU and resource usage so that Chameleo could be run on most PCs. Please check back for our new releases.

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Django on Twisted Web2

Posted on July 14th, 2008 in Uncategorized |

Chameleo 0.2.0.0 release

Posted on June 30th, 2008 in Uncategorized |

OpenCV and Chameleo

Posted on June 23rd, 2008 in Uncategorized |

Easy Seeking Function

Posted on June 8th, 2008 in Uncategorized |

Chameleo 0.1.4.0 release

Posted on June 2nd, 2008 in Uncategorized |

PlayList Plugin

Posted on June 2nd, 2008 in Uncategorized |

Open Access

Posted on May 26th, 2008 in Uncategorized |

Chameleo 0.1.3.1 release

Posted on May 19th, 2008 in Uncategorized |

Chameleo 0.1.3.0 release

Posted on May 17th, 2008 in Uncategorized |

NEWS: Chameleo Linux Port Will be Available Soon!

Posted on May 17th, 2008 in Uncategorized |