Transient quality – this is the likelihood that the file will display transient quality issues, in this discussion measured by low-frame VMAF, or the lowest VMAF score for any frame in the file.Overall quality – this is the overall quality of the file, in this discussion measured with VMAF computed using harmonic mean averaging.With HEVC, VP9, and AV1, compatibility may be an issue. Compatibility – can the player you’re delivering the video to decode and play the file? Here we’re discussing H.264 so compatibility is near universal.Talkingheads – This is a two-minute segment of a low-motion talking head clip.īy way of background, whenever you encode a video file for distribution (as opposed to archiving, or uploading for transcoding) you should consider five factors: compatibility, overall quality, transient quality, deliverability, and quality.Football – This is a two-minute section of the high-motion Harmonic Football test clip which contains regions of both high and low motion.Test – This two-minute clip is comprised of 30 seconds of talking head video and 30 seconds of ballet repeated twice.I’m going to refer to three files during this discussion. The second two, Constant Rate Factor, and Capped Constant Rate Factor, are available in FFmpeg for x264, x265, libvpx-VP9, and libaom-AV1, though I’ll exclusively discuss x264 in this article.
The first two modes discussed, constant bitrate encoding and variable bit rate encoding, are available in virtually every encoder for every distribution-oriented codec. SDMC Partners with NAGRA and Amlogic to Launch Ultra-Secure Android TV Solution for OperatorsįAST Channels TV lands on Samsung TV Plus Proximus Selects 3Ready to Power New Pickx Experiences on Android TV STB, Big and Small Screens Media Distillery and NLZIET Partner to Transform Content Discovery ZTE and iWedia collaborate to bring premium Android TV Hybrid products into the market Amagi Raises Over $100 Million from General Atlantic to Propel Growth as Next-Generation Media Technology PlatformĬlear-Com Helps Harvard Athletics Enhance Production Value and Improve Remote Production Flexibility Live 4K Video from International Trade Fair Streamed Non-Stop for Six Days Using Network Created with TVU Nano 5G Router IWedia Unveils Fast Launch Program to Accelerate Time to Market with its Custom Android TV Launcher
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