Blogs

According to the last published statistics, in June 2017, Whatsapp users sent over 1 billion video messages a day. This obviously represents only a fraction of the market and daily traffic has certainly has grown since then. At the same time, 4K cameras have become standard and mobile screen resolutions have increased in size and quality, driving demand for higher …

I just finished a project that involved encoding lots of downloaded YUV test files, which is something I never tried before. The problem is that there’s no resolution or frame rate information in the file header, so you have to detail all this in the command string. My first crack at the problem evolved into this command string, obviously for a …

Moscow State University’s Video Quality Measurement Tool (VQMT) has been my go-to file analysis tool dating back to 2014 (see my initial review, here, and an update, here). As you can see in this video, version 11 of the tool adds several new features, including support for the VMAF 4K model, data rate graphs, and a results table. I’ve also …

One frustration of writing books for developers is that they’re not the most prolific group when it comes to writing book reviews (or, well, at least not for my books). So it’s always cause for celebration when a review posts, especially when the review accurately captures the value I was hoping to deliver with the book. So it was with Matthew White’s …

Demuxed is the annual conference for video engineers by video engineers. Held on October 17 and 18 in San Francisco, the conference included 31 speakers giving talks in rapid-fire fashion ranging in duration from 10 to 30 minutes. To use a well-worn but appropriate metaphor, the experience is like drinking from a fire hose: almost impossible to comprehend and digest in …

Here’s the description; download handout below. T101. HOW-TO: Fine-Tuning Your Adaptive Encoding Groups With Objective Quality Metrics Tuesday, November 13: 10:30 a.m. – 11:15 a.m. 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 …

W4. Encoding Live & VOD For HEVC/HLS Monday, November 12: 1:30 p.m. – 4:30 p.m. Apple’s support for HEVC in HLS is a groundbreaking event that opens up hundreds of millions of HEVC capable players. If supporting this spec is on your short-term development schedule, check out this workshop. The workshop starts by reviewing the new spec and sharing playback …

I have a confession to make. Though I’ve attended dozens of Streaming Media conferences, I’ve never attended a kickoff session. Not, of course, because the content wasn’t information and insightful, but because I’m always scurrying about trying to finish my own presentations. This dubious accomplishment ends at Streaming Media West next month, when Roger Pantos, the inventor of HTTP Live …

I’ve been pondering what drives codec adoption since I joined compression company Iterated Systems back in 1993. Tonight, I have the opportunity to explore the subject in detail at a meetup sponsored by Bitmovin as an adjunct to the Demuxed conference here in San Francisco. Entitled The Battle of the Codecs: AV1 vs VVC, the meetup will be held tonight …

A recent consulting project involved computing the VMAF, SSIM, and PSNR scores of 30 fps 480p video encoded from a 60 fps 1080p source file. I’ve not performed measurements like this in the past and assumed that simply converting the 60 fps sources file to 30 fps via the “-r” option would convert from 60 fps to 30 fps and …