AV1 Is At Least 70% Faster Than I Thought

AV1 encoding is now only 2x slower than x265. See the latest results here.  Though FFmpeg took 50 minutes to produce a test file that both x264 and x265 encoded in about two minutes, the Alliance for Open Media’s aomenc encoder, running the same version of AV1 (version 2) produced the file in about 15…

Netflix Addresses VMAF Hackability with New Model

TL/DR: Netflix updates VMAF to include a new model that reverses out the effects of techniques like sharpening, contrasting, and histogram equalization.  As I reported in VMAF is Hackable: What Now?, you can increase VMAF scores via simple image enhancement techniques like sharpening, contrasting, and histogram equalization, which, when applied inappropriately, may not actually improve…

Five Star Review for Video Quality Metrics Course

Happy to report a five-star review for my course, Computing and Using Video Quality Metrics: A Course for Encoding Professionals. As far as I know, it’s the only course available that teaches how to compute and use metrics like VMAF, PSNR, SSIMPLUS, and SSIM, including how to create rate-distortion curves and BD-Rate comparisons. The review…

Promising Initial Results with AV1 Testing

AV1 encoding is now only 2x slower than x265. See the latest results here.  I began testing AV1 early this week. Briefly, my tests involve 16 ten-second clips in four genres (movies, sports, animations, gaming) and an “other” category (music video, nature video). I’ve completed the first set of tests with FFmpeg 4.3, benchmarking x264,…

Telecine: MediaMelon SmartPlay Case Study

This article details how Brazilian OTT operator Telecine deployed MediaMelon SmartPlay and decreased bandwidth costs by about 42% while improving the MOS quality of the video delivered. SmartPlay also helped Telecine manage the 4X increase in demand due to COVID-19. This is the third and final story about MediaMelon SmartPlay. The first article describes how…