PDX Video Tech 2018 (1)

This is a past event

44 people went

Location image of event venue


Alchemy is right across 10th from Powell's Books in a brick exterior building.
No code will be needed! Doors open at 6:30pm

This will be our group’s first and only 2018 meetup! Please join us down at Alchemy Code Labs for an exciting night of discussions around video technology.


Doors open 6:30 pm

6:30 - 6:45 - Networking
6:45 - 7:00 - Introduction to the Group (Hosts)
7:00 - 7:30 - Towards Measuring Perceptual Video Quality & Why
7:30 - 8:00 - Low Latency Over HTTP

After the event we plan to go to a local bar to keep the conversation going. Please feel free to join the group!

1. Vasavee Vijayaraghavan, Cloud Media Solutions Engineer (Intel)
2. Nicolas Weil, Senior Solutions Architect (AWS Elemental)

Topic 1:
Towards Measuring Perceptual Video Quality & Why - Vasavee Vijayaraghavan

Video quality measurement is an essential step in any media pipeline. There are quite a few objective metrics available today including well known SSIM & PSNR. These objective metrics are not real time to be used in a live encoder workflow, but fast enough to do quick offline video quality analysis. The challenge with such objective metrics though, is that they are not truly representative of video quality as our human eyes perceive it, thus making it hard for optimizations such as bitrate reduction.

To make decisions such as adding or reducing a certain amount of bitrate while maintaining the same subjective video quality, we need to rely on alternative methods. This talk will thus focus on understanding perceptual video quality and evaluating such alternative methods to make reliable decisions. Among many insights that will be shared, some of them will include: BD-Rate curves, existing rate control methods, gaps in using objective video quality metrics, perceptual video quality evaluation tools & benefits, using alternative methods.

Topic 2:
Low Latency Over HTTP - Nicolas Weil

With OTT video streaming, reducing end-to-end latency is a timely topic. Hearing neighbors cheer for a goal, or reading results on Twitter before seeing them live is a compromised viewing experience. In this presentation, Nicolas will go through why latency for streaming video is a challenge, how it is measured, what viewer expectations are for broadcast and faster-than-broadcast, how latency can be improved in existing workflows and how new technologies like Chunked CMAF are coming to help.