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 look at video encoding with a single point of focus; achieving the best possible quality for the lowest possible…

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 transmitted on other cellular networks like T-Mobile and Sprint that don’t charge for overages. The story was broken by the Wall…

Editing Technique: Restoring A/V Sync in Premiere Pro

Executive Summary: A common problem with footage created using iPhones, screencam tools, Wirecast, and Skype is a loss of A/V sync when importing the video into Premiere Pro. This video tutorial presents a simple fix using Handbrake. You can read a tutorial on the Streaming Media Producer Website here.  Overview and discussion: Many sources of…

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 identifies B-frames in encoded streams, and computes the overall B-frame percentage. Compressionists seeking the most efficient streams should acquire Switch and test…

Survey: CBR, VBR, or Other for ABR Streaming

The recommended bit rate control technique for VOD files produced for adaptive streaming is one of the most fundamental decisions encoding professionals make, but in my view also one of the most confusing. If you scan the white papers on the topic, most recommend using constant bit rate (CBR) encoding to simplify the stream selection…