A dependency-free (pure standard-library) Python tool that turns a list of playback stall events into the streaming-QoE numbers the way the standards define them. It does NOT decode video or compute a picture metric; a rebuffering ratio comes from PLAYER EVENTS, not pixels. (1) REBUFFERING RATIO using the CTA-2066 denominator stall_time / (stall_time + play_time), with startup excluded; reproduces the article's 27 / (27 + 2700) = 0.99% worked example. (2) FREQUENCY in stalls per hour (catches th
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The handbook · 7 volumes
Fora Soft Video Engineering Handbook
This rebuffering ratio calculator turns stall events into QoE numbers exactly as the standards define them, including the CTA-2066 denominator. Our seven-volume handbook covers the whole video stack; Volume 3 is where rebuffering, stall recovery, ABR and QoE monitoring are covered in depth, with Volume 1 on encoding and Volume 6 on AI models. Written by Nikolay Sapunov, CEO at Fora Soft.
Your rebuffering ratio looks fine on paper but viewers still complain?
Send us a sample of player events, and we will recompute the ratio by the standard and show where stalls actually come from. 250+ video products shipped since 2005.
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