Category: My journal

MPEG数据流的分辨及用途

ES是基本数据流(elementary stream):用于某些硬盘播或编辑系统,如m2v

PS是程序数据流(program stream):用于播放或编辑系统,如m2p

TS是传输数据流(transition stream):主要用于数据传输,如HDV机器内部记录的m2t

ES首先需打包成PES流包,然后PES根据需要打包成PS或TS包进行存储或传输。其每路ES只包含一路信源的编码数据流,所以每路PES也只包含相对应信源的数据流。

对PS流而言,每个PES包头含有PTS和DTS,流识别码,用于区别不同性质ES。然后通过PS复用器将PES包复用成PS包。实际上是将PES包分解为更细小的PS包。在解码的时候,解复用器将PS分解成一个个PES包,拆包器然后将PES包拆成视频和音频的ES,最后输入至各自解码器进行解码。

一个问题是:各个ES在解码时,如何保证视音频的同步呢?除了PTS和DTS的配合工作外,还有一个重要的参数是SCR(system clock reference)。在编码的时候,PTS,DTS和SCR都是由STC(system time clock)生成的,在解码时,STC会再生,并通过锁相环路(PLL-phase lock loop),用本地SCR相位与输入的瞬时SCR相位锁相比较,以确定解码过程是否同步,若不同步,则用这个瞬时SCR调整27MHz的本地时钟频率。最后,PTS,DTS和SCR一起配合,解决视音频同步播放的问题。 Read more

实战解决edius6.x无法导入apple mov格式

之前由于很少使用mov格式,所以一直未能注意这个问题,昨天客户到公司修改片子,其中需要用到mov的素材,多次导入无法识别,以为是quicktime的问题,安装了多个版本问题依旧.网上搜索发现这个问题很多人遇到了,因此想到了之前家里的电脑安装的是qt-lite这个quicktime的插件,试着安装试一下的态度,结果还是可行的.

1.卸载电脑中已存在的quicktime版本.

2.下载qt-lite:http://www.free-codecs.com/download/QT_Lite.htm

3.安装下载的qt lite程序。

4.如果需要在浏览器使用qt插件可以注册它。以得到更多的功能。

注册信息:

Name: Dawn M Fredette
机构:shanghai
S/N: 4UJ2-5NLF-HFFA-9JW3-X2KV

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Grass Valley Edius Ver:6.02

 Version 6.02 ( Release: 1/24/2011)

[New Features]

  • Added support for loading MXF file on SxS card which was recorded by SONY PMW-500.
  • Added support for playlist which was output to FTP/HDD(USB) using PLAY LIST EXPORT of AJ-HPM200.
  • Added support for timecode acquisition from Picture timing SEI.
  • Added support for H.264 hardware encoding utilizing Intel GPU.

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ProxyCodec64 编码代理软件

自从edius6.x开始,破解总是不尽人意,编码总是不能被其他软件所使用,破解作者貌似也没用继续破解的想法,在各论坛也出现了备份恢复,强制卸载等各种各样的解决方法,但总过于繁琐,不利于使用,于是便有了如下这个方式,通过编码代理来让after effects或者其他软件所使用.

首先需要下载ProxyCodec64这款软件,该软件也是小日本开发的,如果懂得日文也可以去程序主页看看:http://amamaman.web.infoseek.co.jp/proxycodec/proxycodec.htm

Program name: Proxy Codec 64
Category : video codec utility (VCM)
OS : Windows7 (only 64bit)
License : Freeware
Author : amaman
Country : Japan
Language : English, Japanese
URL : http://amamaman.hp.infoseek.co.jp/english/proxycodec.htm
Release date: Oct.19.2009

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博客的一些小改动

最近闲来无事,一直在修改博客,说起来自从去年10月份以来博客就一直没有管理,文章没更新,什么也没过问.

最近把博客从原来的Justhost空间迁移到了现在的vps上面.速度看起来比原来快乐一点儿,不知各位访问的速度如何.空间放置在美国,国内访问速度应该勉强吧(应该比国内那些伪劣的IDC好很多,至少不会像以前那样三天两头出现无法访问的情况.)

博客增加了两个功能和一个归档页面.详细如下:

  1. 添加了评论邮件回复通知功能.
    (默认开启,如果不需要可以点击回复评论框下的复选框取消该回复。)
  2. 增加了wap访问功能,自动判断访问接入设备.手机设备自动采用wap方式.
    (大家不妨试试用手机访问试试)
    (//jalena.bcsytv.com/?mobile,//jalena.bcsytv.com/?iphone)
  3. 增加了文章归档页面,将所有的文章连接归档到了//jalena.bcsytv.com/archives页面。

来几张我的黑莓访问博客的截图:

先就这样吧.希望这样能方便各位的访问,当然这也是我的地盘,我也喜欢她变得更好~

:p

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Grass Valley EDIUS Ver.6.02

Edius 6

Edius 6

Grass Valley EDIUS Ver.6.02 LS4 With Features - 2011 (Eng/Ger/Jpn/Rus) | 2.78 GB

Grass Valley EDIUS 6 - A new version of one of the best professional software for video processing. EDIUS supports real-time performance with video virtually all known formats, as well as uncompressed video. The program provides an opportunity to work with an unlimited number of layers containing audio, video, data or effects. Projects created in EDIUS, you can save by using your own codec Canopus HQ, which is able to encode a variable bit rate.

New, 6-th version of EDIUS has over a hundred new features and improvements. Many of the filters and effects programs work in real time. That is why many believe EDIUS fastest video editor.

Key features of Grass Valley Edius:

  1. Installation of a real-time HD / SD formats, including DV, HDV, AVCHD, MPEG-2, Windows Media and QuickTime.
  2. A flexible user interface, an unlimited number of tracks for video, audio, titling.
  3. Editing and converting real-time HD / SD formats (16:9 and 4:3)
  4. Editing and converting real-time video with different frame rates 60i, 50i and 24p
  5. Editing and converting real-time video with different resolution 1440x1080, 1280x720 and 720x480
  6. HD / SD effects, keyers, transitions and titles in real time
  7. Output video to DV in real time straight from the timeline
  8. Quick export HDV
  9. Coding of individual segments of a time-line ('Smart Rendering') with the support of MPEG, and HDV. Segment Encoding function greatly reduces the time required to export the project, encoding only the edited segments and edited clips.
  10. DVD-authoring in the timeline
  11. Quick Titler software utility for the titration, in real time
  12. Multi-camera editing of up to eight different sources at one time
  13. High-speed SD HDV and MPEG-2 export, with support for dual-core technology
  14. Direct-to-DVD export
  15. and much more..

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