Encoding

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In their paper entitled, Multi-resolution Encoding for HTTP Adaptive Streaming using VVenC, Kamran Qureshi, Hadi Amirpour, and Christian Timmerer from the Christian Doppler Laboratory ATHENA (Alpen-Adria-Universität, Klagenfurt, Austria) propose an accelerated multi-resolution encoding strategy for HTTP Adaptive Streaming (HAS) using VVenC, an optimized open-source Versatile Video Coding (VVC) encoder. Their approach, called MEVHAS (Multi-resolution Encoding in VVenC for HTTP Adaptive …

In this interview from Mile High Video 2025, Jan Ozer from the Streaming Learning Center spoke with Mickaël Raulet, CTO of Ateme, about the company’s latest developments in video delivery and encoding technology. Mickaël shared his insights on emerging trends, including AI-based video encoding, advanced DRM solutions, and the growing adoption of new video codecs. You can watch the interview …

I sat down with Romain Bouqueau, Founder and CEO of Motion Spell, at Mile High Video 2025 to discuss the latest advancements in GPAC, low-latency streaming, and AI integration. We discussed Motion Spell’s work on packaging technology, its role in low-latency streaming, and the challenges and opportunities of building custom language models for multimedia tools. Romain also shared his thoughts …

At Mile High Video 2025, I sat down with Igor Oreper, Bitmovin’s Chief Strategy Officer, to discuss the company’s latest innovations, including their next-generation web player, advancements in live encoding, and AI-driven contextual advertising. Igor also shared his insights on Bitmovin’s cloud-agnostic strategy and the importance of developer-focused events like Mile High Video. You can watch the interview on YouTube …

At Mile High Video 2025, I sat down with Jean-Baptiste Kempf (JB), founder of Kyber and lead developer of VLC, to discuss his latest innovations in ultra-low latency video control. JB is well-known in the open-source community for his work on VLC Player and FFmpeg, and now, with Kyber, he’s pushing the boundaries of real-time machine control. You can watch …

I first encountered the line, “Anything worth doing is worth overdoing,” in the Robert Heinlein novel Time Enough for Love. I bring this up because this is my third recent article on GOP size, and I think I’m close to beating this topic into the ground. I’ll let you be the judge. To recount, I reported on testing in an …

One of the most fundamental encoding decisions is the size of the Group of Pictures (GOP) or the frequency of I-frames within an encoded file. I-frames, also known as keyframes, are the starting points for groups of pictures, consisting of I-, B-, and P-frames. Traditionally, the GOP size is directed by adaptive bitrate streaming considerations, such as ensuring an I-frame …

Here are three things to know about 2-pass x265 encoding with FFmpeg.  If you’re using -pass 1 and -pass 2 in your command string, it’s probably not working. You must use x265-params 0:pass=1 and then x265-params 0:pass=2 in the second pass. In the way we absolutely love about FFmpeg, there’s no error message if you use -pass 1/-pass 2; it …

I’m running some 1-pass vs. 2-pass comparison testing with x265. Unlike with x264 (see tests here), there’s a substantial performance penalty for running 2-pass with minimal quality benefit. I tried the no-slow-firstpass=1 setting, which only accelerated two-pass by about 14%. Here are the results from a single test file. I don’t want to process them all if there’s a magic …