Jan Ozer

 

Jan has worked in digital video since 1990, and is the author of over 20 books related to video technolgy, including Producing Streaming Video for Multiple Screen Delivery and the Premiere Pro CC: Visual QuickStart Guide. Jan currently writes for Streaming Media Magazine and Streaming Media Producer, and consults widely on streaming media-related topics.

Content Posted by Jan Ozer

Book Excerpt: VBV Buffer Explained

One of the topics I'm addressing in my upcoming book is the VBR rate control model, a very complicated concept. Here's the section in the book, which I'm making available for comments, corrections, and clarifications. I'm pretty sure the technical de...

The Four Pillars of Video Encoding

  Figure 1. The four critical aspects to consider when encoding a file. Executive Summary: While video quality is always top of mind, consider deliverability, compatibility, and playability before finalizing your encoding presets.  Too often we loo...

Fine-Tuning Your Adaptive Encoding Groups With Objective Quality Metrics

Click over to the main article to download the presentation. Here's the description. 

Choosing the number of streams in an adaptive group and configuring them is usually a subjective, touchy-feely exercise, with no way to really gauge the effectiveness and efficiency of the streams. However, by measuring stream quality via metrics such as PSNR, SSIM, and VQM, you can precisely assess the quality delivered by each stream and its relevancy to the adaptive group. This session identifies several key objective quality metrics, teaches how to apply them, and provides an objective framework for analyzing which streams are absolutely required in your adaptive group and their optimal configuration.

Streaming Media East Presentation: Status of HEVC and Other UHD Codecs

johnny-automatic-scales-of-justice-2400px.pngHere's the description; click over to the main story to download the handout.

This session explores the current status of HEVC, including an update on the proposed royalty terms and status of High Dynamic Range Specifications, and the status of competitive technologies such as PERSEUS, VP9, and the codec from the Alliance for Open Media.

Handout for Codecs and Packaging 2016

Click over to the main article to download the handout. Here's the description.

As video resolutions increase and target playback platforms multiply, video producers must leave their H.264/HLS/HDS comfort zone and expand into HEVC, VP9, and MPEG-DASH. This workshop is divided into multiple segments by target platform to teach you the applicable standards and best strategies for delivering live and VOD adaptive video to viewers on that platform, both with and without DRM. Along the way, you'll learn options for producing H.264, HEVC, and VP9; the status of standards such as the Media Source Extensions (MSE)and Encrypted Media Extensions (EME); and how and when to utilize them. Attendees walk away knowing the technical requirements for delivering to all key platforms and the best practices for making it happen.

Encoding Brief: Apple Releases HLS Authoring Specification for Apple TV

Executive Summary: In October 2015, Apple released a  document entitled HLS Authoring Specifications for Apple TV (HLS stands for HTTP Live Streaming, the adaptive bit rate technology used to deliver video to Apple TV and other iOS devices). If you'...

Netflix Admits to Throttling AT&T and Verizon Cellular Movies

Last week, Netflix admitted that they artificially throttle the data rate of videos transmitted over AT&T and Verizon cellular networks to limit bandwidth consumption and the associated overage charges. Netflix doesn't throttle video streams tran...

Webinar: Simplifying Encoder Purchase and Configuration Decisions with Real Time Quality Metrics

I'm participating in a webinar with IneoQuest on Thursday, March 31 at 2:00 PM EST as part of their launch of a new product with live, non-referential quality metrics. The bottom line is that if you're comparing real-time encoders to make a purchase ...

Technical Brief: Switch from CBR to VBR to Improve Overall Quality and Avoid Transient Quality Issues

This article explores the differences between constant bitrate encoding (CBR) and variable bitrate encoding (VBR) and recommends that producers still using CBR should switch to 110% constrained VBR to improve overall quality and avoid transient quality issues with CBR. 

Five Signs Your Encoding Ladder May Be Obsolete

Your encoding ladder is the set of encoding parameters that you use to create the various files that you deliver adaptively to your web viewers. These encoding parameters can live in your on-premise encoder, in your cloud encoder, or in your online video platform (OVP). This article describes five signs that indicate that you may need to revisit your encoding ladder.