-->
Save your FREE seat for 流媒体 Connect this August. 现在注册!

The 2012 编码 and Transcoding Buyers' Guide

文章特色图片

流媒体编码宇宙已经演变成一个具有多重属性的复杂空间, 经常交叉的市场. 在这篇概述文章中, 我将确定最关键的细分市场,并讨论每个市场中的一两个关键产品.

My criteria for product selection are unavoidably subjective; in most instances, 我选择了我最了解和使用最多的产品, and know to be competent at their intended tasks. This doesn't mean that the products that I didn't choose aren't worthy; rather, 这只是意味着我不像我写的产品那样熟悉它们.

Let's start with on-demand and live hardware products, and then work our way to software and cloud- based encoders.

硬件

硬件按需编码器: 电影《百家乐软件app最新版下载》英文名 服务器

With entrants from industry veterans such as Envivio, Inc.; 数字急流; Cisco; and others, there are lots of worthy products in this category. 也就是说, choosing the representative product, 基本的服务器, was still an obvious choice; it's the H最快.264编码器 that I've ever tested, with very good quality. 使用以下用户 ESPN 以及多家奥运会转播商,显然我不是唯一这么认为的人.

这款linux驱动的服务器集成了两个六核westmere级英特尔至强(Xeon) cpu和两个NVIDIA Corp .. GPUs, and it has an MSRP of $25,950. 虽然操作是基于浏览器的, there's a lot of logic built into the interface, 包括错误检查, 这有助于防止在处理开始后启动将失败的作业. 基本的服务器的去隔行功能非常出色——对于那些分发隔行源素材的人来说,这是一个关键的质量考虑因素. Closed caption support is quite extensive, 包括嵌入字幕或创建字幕文件(SRT)的能力, 重度, and TTML files) for mpeg - 2 transport streams, 光滑的流, 闪光, 和苹果iOS设备.

服务器 is kind of a one-trick pony; its Windows Media output is subpar, 它不输出VP6或WebM. But if high-volume, 高质量的 H.264编码是你的需要,元素服务器应该在你的短列表上.

基本的服务器

电影《百家乐软件app最新版下载》英文名 server——用于高容量、高质量H.264编码. 

硬件实时编码器: 数字急流 TouchStream

I could have gone two ways with this category: choose a big-iron, on-premise encoder for periodic or continuous broadcasts, 或者突出一个便携式装置,从道路上直播事件. 我选择后者是因为我熟悉市场,特别是我选择的产品, the 数字急流TouchStream portable encoder.

所有现场活动制作人都同意的一件事是,当你必须携带设备去参加活动然后回家时,越少越好. 因为你可以通过触屏界面运行鞋盒大小的TouchStream, this means that you don't need to pack a monitor or keyboard, as you would with competitive units from other vendors.

数字急流提供了广泛的模型,输入信号从复合SD到高清SDI,可以输出H.264, VP6, mpeg - 2, 和Windows媒体视频在单个流或自适应流适合平滑流, 动态流, 和HTTP直播.

The Windows-based software is easy to use and functional, with useful adjustments for brightness, 对比, 饱和度和色调, special and temporal noise reduction, 音频音量控制. 另一方面, the template creation software is overly complex, but once they've create their presets, most users won't need to use this software. 最重要的是,H.我在测试期间创建的264和WMV流显示出一致的良好质量. TouchStream设备并不便宜, but if you're looking for a 高质量的, highly portable live encoder for road productions, TouchStream是一个很好的选择.

With our hardware categories addressed, let's move to software.

数字急流TouchStream

数字急流TouchStream易于使用和高度便携,它输出高质量的视频. 

软件

捆绑软件编码器: 苹果 压缩机4

尽管苹果 Compressor几乎永远都没有真正的功能或界面更新, 它是大多数Final Cut Pro X (FCPX)编辑器选择的编码工具, 主要是因为成本(49美元).99)以及能够直接从FCPX时间轴导出的便利性. 压缩机的优点包括与所有苹果设备的坚如磐石的兼容性和相对有竞争力的编码时间, in part courtesy of 苹果's Qmaster, 它让压缩机运行多个编码实例在多核心计算机上. Compressor also offers a very simple clustering function, 它允许局域网上的多个用户卸载编码杂务到网络上安装了压缩机的其他计算机.

Negatives include lack of support for the H.264高调, 这也许是为什么压缩机的质量落后于其他编码器在更积极的数据速率. compression也采用了苹果一贯的排外观点,即不能在iOS设备上运行的格式, with no support for either VP6 or WMV. Also lacking is watch folder operation, 限制了Compressor与没有安装Compressor的工作组中的其他人共享编码工作的能力.

苹果压缩机4

苹果 Compressor’s (very) familiar interface. 

Adobe 媒体编码器CS6

日语中的Kaizen指的是在一段时间内对产品进行许多小而持续的改进, 它是描述Adobe如何改进Adobe媒体编码器(AME)的完美术语。. Each version incorporates meaningful interface enhancements; in CS5 Adobe simplified watch folder operation and in CS6, Adobe made presets easier to find and apply. 另外,CS6带来了并行编码,这对那些制作自适应流的人来说是一个巨大的好处.

许多其他特性使AME成为creativesuite输出的首选编码器, 包括从Premiere Pro和After Effects导出到AME的能力, 以及直接加载Premiere Pro序列和After Effects组合而无需打开原始程序的能力. Format support is also extensive with multiple presets for 闪光, 安卓, 和iOS输出, with VP6 support on the Windows and Mac platforms, and Windows Media output on Windows installs. H.264的质量也很有竞争力,手表文件夹可以在工作组中共享使用.

Adobe 媒体编码器CS6

Adobe 媒体编码器CS6带来了改进的预置可用性和并行编码. 

桌面编码器: 索伦森 挤压

索伦森挤压是另一款不断改进的产品. 在版本8中.0, 索伦森 added support for the x264 codec, which delivers better quality than the older MainConcept codec, 这仍然包括在内. 最新的版本,挤8.5, 增加了对单个文件的加速编码,以及对自适应流的无与伦比的支持, including presets for HTTP 在线直播, HTTP动态流, 光滑的流, 和冲, 以及一个万无一失的界面,确保一致的关键帧间隔和音频参数在一个自适应组的所有文件.

Other 索伦森 products also add significant value to 挤压. 例如, 挤压用户可以将编码作业发送到高容量的挤压 服务器安装, 工业强度编码, 在索伦森 360中可以轻松访问客户审查和批准以及视频发布. 挤压 also outputs all relevant streaming formats, 包括WebM, VP6, 以及Windows Media和Avid DNxHD和ProRes等中间格式. 对于大多数流媒体格式, 挤压提供了广泛的配置选项,是理想的压缩专家, with presets to simplify encoding for nontechnical users.

索伦森挤压

索伦森挤压的自适应流预置HTTP动态流. 

企业编码器: 谐波的 工作流系统

谐波公司.'s 工作流系统 (WFS) is a soup-to- nuts, on-demand encoder that will retrieve your files from a variety of remote locations; encode them to a range of streaming, 中间, and playout formats; check the files for quality and conformity and deliver them over FTP, HTTP和CIFS. 顾名思义, WFS是一个基于任务的引擎,可以控制多个其他谐波模块, 包括ProMedia Carbon(前身为Carbon Coder)和Rhozet质量控制系统(QCS).

Carbon has long been my go-to encoder for high-volume, 高质量的, 多种格式编码, though its performance has slipped recently compared to its peers. 然而, the ProMedia Xpress software that I recently beta tested was the fastest software-only encoder I've seen by a wide margin; it will likely restore Carbon to the top spot in the near term.

谐波的QCS项目拥有其竞争对手所有的花哨功能, 它既可以用于文件分类和质量控制检查的预编码,也可以用于后编码. 然而,真正将WFS与其最接近的竞争对手区分开来的是纯粹的可用性. While perhaps not as programmable as Telestream Vantage, 例如, 使用起来简单多了, and it's 更 accessible for nontechnical users.

Of all the categories discussed here, 未来几个月,企业编码器市场将出现最剧烈的变化, as virtually every vendor in the space, 包括数字急流, 谐波, 索伦森, 和Telestream, release significant updates or new enterprise- oriented products. 敬请期待.

谐氏工作流程系统

谐波 WFS:创建带有预编码和后编码质量控制检查的工作流. 

在线直播 编码 软件: Telestream Wirecast

通常, 第一次视频网络直播只需要5分钟,你就会开始思考, “天哪, this would look really great with titles for the speakers,以及“我到底要在休息或中场休息时播些什么呢??“嗯, 您可以花费数千美元购买可以整合这些元素的硬件, or you can buy Telestream Wirecast, which starts at $449 and lets you add titles to your videos, play back hard disk- based videos and much, 更, including switching between multiple cameras.

例如, 您可以广播与Wirecast捕获站在同一网络上的任何计算机的屏幕, a great feature for software training or presentations. Wirecast还包括实时色度键功能,Pro版Wirecast(995美元)补充了3D虚拟设置. 转播体育赛事? Wirecast Pro also includes an integrated scoreboard. Available for both Macintosh and Windows, 两个版本都可以为闪光和QuickTime广播生成文件, while the Windows version can also output Windows Media Video.

Telestream Wirecast

Wirecast让我在这个网络广播中添加简单的标题,并在中场休息时发布议程表. 

基于服务器的软件: Wowza 代码转换器

Wowza Media 服务器是第一批能够传输传入H的产品之一.264流成适合传送到一系列设备的格式. Wowza代码转换器 takes this one step further, 将单个传入的高质量流转换为多个输出流,以实现自适应流, 最小化延迟. This solves two very major problems for live streaming producers, 事件的编码密度和事件的有限出站带宽.

具体来说,假设事件生成器希望在2点分发6个自适应流.5 mbps, 1.8 mbps, 1.4Mbps, 1Mbps, 600Kbps, and 300Kbps. 这通常需要现场至少两个编码站, which is expensive and adds to the transportation and setup burden. Getting the streams out of the building would also require 7.7Mbps of outbound bandwidth for the streams, plus some overhead.

With Wowza代码转换器, event producers can broadcast a single 2.5Mbps流到远程服务器,在那里它可以被重新编码成计划的自适应流. 服务器容量可以根据需要增加,出站带宽需求减少66%. 转码流可以使用闪光 RTMP/HTTP动态流作为自适应比特率文件交付, 苹果 HTTP直播, 和Silverlight平滑流, 或者在任何Wowza Media 服务器 3支持的协议上作为单比特率流.

Wowza代码转换器

Wowza代码转换器允许事件生产者向远程服务器广播单个流, where it can be re-encoded into multiple streams. 

云编码: 编码.com

云编码是大多数读者最不熟悉的类别,老实说,对我来说也是如此. I have worked with several clients who use 编码.com是我选择的云编码平台,所以我熟悉它的工作流程和编码工具.

除了应用程序编程接口(API)之外,编码.Com与watch文件夹一起工作,因此您不必雇用程序员来开始编码. 该服务支持最相关的编解码器和自适应流格式,并在逻辑接口中提供广泛的预置,以便于自定义. And you can upload a file to check out the service, 尽管有100MB的限制, 你真的无法测试质量.

Speaking of quality, how does 编码.. com的质量和性能与其他服务如Zencoder相比? I honestly don't know because I haven't run any comparative tests. 随着上传带宽的增加和相关格式的速度不断加快, 云编码将变得越来越重要,并将成为我们在未来几个月分配更多审查百家乐软件的市场.

编码.com

编码.com supports most relevant codecs and adaptive streaming formats. 

本文以“买方指南:编码和转码”的形式出现在《 流媒体 杂志该杂志将很快到达订阅者的邮箱,并以完整的数字版本上线.]

流媒体覆盖
免费的
合资格订户
现在就订阅 最新一期 过去的问题
相关文章

2017年转码器买家指南

云转码越来越受欢迎,但有时只有专用设备才能做到. 对于大规模的自动化视频工作流,以下是企业需要了解的内容.

买家编码指南2017

From pico to infinite, encoders come in all shapes and sizes. 这里是所有的信息企业需要选择最好的编码器为他们的情况.

How to Choose an Enterprise-Class Video Encoder

硬件? 软件? 工作流系统? 各自的优势是什么? For those not sure where to start, look here first.

Brightcove收购Zencoder

Brightcove buys the Bay Area cloud computing company for $30 million; will allow it to remain independent and even power competing services.

Telestream Wirecast Makes Live Video Flexible and Fun

专业级别的视频直播并不复杂. Wirecast与各种合作伙伴一起工作,使用起来很愉快.

编码 for YouTube: How to Get the Best Results

是的,每次都有办法制作好看的YouTube视频. Read on for expert advice and test results.

Companies and Suppliers Mentioned
" class="hidden">中威电子