Encoding your video


How to Use Objective Quality Measurement Tools

Every compressed file involves dozens of configuration-related decisions, including resolution, data rate, H.264 profile, VBR or CBR, entropy coding technique, x.264 preset, b-frames, reference frames—the list goes on and on. Most encoding professionals simply use configurations gleaned from presets supplied with their encoding tools, or perhaps from recipes found on the web. But how can you be sure that you’re squeezing the last bit of quality out of the selected data rate, or that your videos are optimally bandwidth-efficient? How can you tell how much additional quality a 1080p@ 7.5Mbps stream delivers over the 5.5Mbps stream?

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'...

Conference Research Tests Adaptive Video and Quality Benchmarks

The Society for Imaging Science and Technology hosts the annual International Symposium on Electronic Imaging, held this year in San Francisco, California, from February 14 to 18. The Symposium has eight tracks across a range of disciplines, where researchers from industry and academia present papers and findings.

Encoding Brief: Phase Out Low Quality Streams in Your Encoding Ladder

Executive Summary: Now might be the time to consider phasing out the lowest quality streams in your encoding ladder to reduce encoding and storage costs. Check your server logs to determine consumption of these streams before doing so.  Overview an...

Encoding Brief: The Benefit of B-frames

Executive Summary: B-frames increase compression efficiency, particularly at lower bitrates. However, not all video encoders deliver the requested number of B-frames when encoding using default parameters. Telestream Switch is a software program that...

SSIMWave SQM Review: Frustrating Video Quality Measurement

I'm big into quality control and objective video measurement, and the latest tool that I've tested, SSIMWaves SQM (link to tool here) , offers a couple of unique elements, including a scoring system that attempts to correspond to actual human subject...

Why I like VQM better than PSNR or SSIM

Objective video quality benchmarks serve a valuable role in evaluating the quality of encoded video. There are multiple algorithms, and multiple tools to measure them. Though the Peak Signal to Noise (PSNR) and Structural Similarity Index (SSIM) have...

Review: Bitcodin, a Cloud Video Encoding Service From Bitmovin

Bitmovin is an Austrian company that supplies both a cloud encoder (bitcodin) and an HTML5 player (Bitdash). It offers an all-in-one service to companies seeking to encode and distribute files via HTML5 to computers and mobile devices. I reviewed the...

Adobe Media Encoder Gets HEVC and VP9

In their latest Creative Cloud reveal, which I wrote about here, Adobe didn't include either HEVC or VP9 in Adobe Media Encoder. It turns out they didn't have to. Vanguard Video and a company called Fnord Software are doing it for them. First, HEVC. ...

How to Encode to HEVC: A Simple Guide for H.265 First Timers

My article, How to Encode to HEVC: A Simple Guide for H.265 First Timers, just appeared on StreamingMedia.com. I did a lot of testing with x.265 and the MainConcept HEVC codecs to understand the quality/encoding time tradeoffs of their various featur...