Using Debugmode Frameserver to bridge MediaCoder and Adobe Premiere (Stanley posted on June 18th, 2010 )

We can use Debugmode Frameserver to easily connect Premiere (and some other NLE software) and MediaCoder 0.7.3.4682 (or later version). Video exported from Premiere can be encoded directly with MediaCoder to save time and effort and improving quality.

The following are the brief steps to make it work.

Installing DebugMode Frameserver

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Breaking news: x264 officially supports Blu-ray encoding重大消息:x264正式支持蓝光视频编码 (Stanley posted on April 26th, 2010 )

Quoted from the blog of an x264 developer:

For many years it has been possible to make your own DVDs with free software tools. Over the course of the past decade, DVD creation evolved from the exclusive domain of the media publishing companies to something basically anyone could do on their home computer.

But Blu-ray has yet to get that treatment. Despite the “format war” between Blu-ray and HD DVD ending over two years ago, free software has lagged behind. “Professional” tools for Blu-ray video encoding can cost as much as $100,000 and are often utter garbage. Here are two actual screenshots from real Blu-rays: I wish I was making this up.

But today, things change. Today we take the first step towards a free software Blu-ray creation toolkit.
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MediaCoder iPod Edition added preset for iPad video format (Stanley posted on April 20th, 2010 )

The latest MediaCoder iPod Edition (version 0.7.3.4630) has added support for iPad video format. The 64-bit version of this edition is also available.



iPad Supported Video Formats

  • H.264 video up to 720p, 30 frames per second, Main Profile level 3.1 with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats
  • MPEG-4 video, up to 2.5 Mbps, 640 by 480 pixels, 30 frames per second, Simple Profile with AAC-LC audio up to 160 Kbps, 48kHz, stereo audio in .m4v, .mp4, and .mov file formats
  • Motion JPEG (M-JPEG) up to 35 Mbps, 1280 by 720 pixels, 30 frames per second, audio in ulaw, PCM stereo audio in .avi file format

Head for the page of MediaCoder iPhone/iPod/iPad Edition最新的MediaCoder iPod专用版包含了iPad视频配置。该版本的64位版也同时发布。

iPad支持的视频格式

* H.264视频最高720p, 每秒30帧, Main Profile level 3.1, 音频为AAC-LC音频最高160 Kbps, 48kHz, 以mp4或者.mov格式封装;
* MPEG-4视频最高码率2.5 Mbps, 最高640×480分辨率 pixels, 每秒30帧, Simple Profile, 音频为AAC-LC音频最高160 Kbps, 48kHz, 以mp4或者.mov格式封装
* Motion JPEG (M-JPEG) 最高35 Mbps, 最高1280×720分辨率, 每秒30帧, 音频为ulaw, PCM音频, 以avi格式封装

点击此处立即下载最新MediaCoder iPod/iPhone/iPad专用版

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Decoding blocking issue caused by newly included MPlayer/MEncoder MTMPlayer/MEncoder多线程版本导致的解码阻塞问题 (Stanley posted on March 2nd, 2010 )

Since MediaCoder 0.7.3, multi-threaded version of MPlayer and MEncoder are included in the full pack  distribution (in the past only included in optimization packs). However, as the MT version of MPlayer/MEncoder is still experimental, its inclusion brings some problems with MediaCoder. Decoding of Some H.264 files (mainly MKV) is blocked sometimes. If you encounter this issue, a workaround is to disabling multi-threaded decoding. You can do this by clicking Source button on Video tab. A pop up dialog should display the options of MEncoder and clicking “Decoding threads” and put a value of 1 (meaning single thread) in the blank at the bottom of the dialog.MediaCoder 0.7.3刚发布了几个星期,一些用户发现新版本没有过去稳定。经过调查,发现主要问题是因为新版本采用了多线程版的MPlayer来进行H.264解码,而这个多线程版本目前还不是非常稳定,过去只在处理器优化包中包含。主要现象是解码一些H.264的MKV文件时,MediaCoder会阻塞住。如果您遇到这样的问题,一个解决方法是禁用多线程解码,具体操作如下:

  1. 点击“视频”栏上的“来源”按钮
  2. 在弹出的对话框中,选中Decoding threads选项
  3. 在对话框下方的值改为1(解码线程数)

Low Cost 3D Video (Stanley posted on February 21st, 2010 )

A low cost apparatus for capturing stereoscopic video is described and footage from the apparatus is presented in anaglyph form.

A piece of L-shaped extruded aluminum was cut to length and drilled. Cameras are attached with 1/4-20 panhead machine screws, 1/4″ nylon washers, and 1/4-20 wingnuts. The apparatus is attached to a quick release shoe for use with a tripod. Cameras are manually activated for simultaneous filming. A 6.5cm baseline is used (similar to human eye baseline). Longer baselines can be used to increase parallax when filming distant objects. Left and right video channels are processed and composited in video editing software. Audiovisual cues are used to synchronize the video streams. Depth may be adjusted by changing the x-direction offset between the right and left video channels. Total cost for cameras and materials: USD 250.

Happy Chinese New Year!祝大家新春快乐! (Stanley posted on February 14th, 2010 )

The Chinese new year of tiger has just arrived. Happy new year to all the fellow Chinese all around the world. On this very first moment in the Chinese new year, and rare to see, the valentines day on the same day, MediaCoder 0.7.3 is released. The splash screen was modified a bit with a pattern of tiger in paper-cut art on it. Comparing to the formal 0.7.2.4582, lots of changes have been made. Give it a shot and don’t forget to give us your feedbacks.

新年到了,恭祝各位MediaCoder的新老用户和朋友们新春快乐,事事顺心。在这新年的第一时间,献上MediaCoder虎年第一版-0.7.3.4600。相比上一版本0.7.2.4582,新版本在很多细节上有所改进,期待各位给予宝贵的反馈。