Mapping SSIM and VMAF Scores to Subjective Ratings

One visual quality metric that’s getting a bit more love lately is the Structured Similarity Index (SSIM). For example, when Facebook launched their first VR Metric, SSIM360, they based it on SSIM. I’ve generally avoided using SSIM because the scoring range is too small for my liking (0 – 1) and I wasn’t aware of any…

Per-Title Encoding Resources

For all talk about the new AV1 codec or HEVC in HLS, the simplest and fastest way to save bandwidth costs and improve your viewer’s QoE is to deploy video optimization or per-title encoding. I explore why in a column now up on StreamingMedia.com. You can implement a simple form of per-title encoding with FFmpeg…

Download Handout – Comparing Per-Title Encoding Options

Another of my sessions at Streaming Media. Here’s the description, download PDF below. T203. HOW-TO: Comparing Per-Title Encoding Options Wednesday, May 9: 1:45 p.m. – 2:45 p.m. Per-title encoding techniques customize the encoding ladder to match the encoding complexity of the source, saving bandwidth on easy-to compress videos and ensuring the quality of more complex…

Download Handout – Comparison of H.264, HEVC, VP9 and AV1

One of my sessions at Streaming Media East. Here’s the description; download the handout below. T102. HOW-TO: Comparing AV1, VP9, HEVC, & H.264 Tuesday, May 8: 11:45 a.m. – 12:30 p.m. Many content distributors and aggregators still use H.264 as their primary, if not exclusive, codec, but the bandwidth savings promised by newer, more powerful…

Download Handout – Multi-Distribution of Live Video

One of my three sessions at Streaming Media East. Here’s the description; link to handout below. Note: one issue that came up during the discussion was the ability for systems to handle multiple language and captions. After the presentation, I heard from a representative from Go Easy Live who stated, “As additional informational, I confirm…