Performance & Troubleshooting

What is a “rebuffer”?

Updated June 10, 2025

A rebuffer (also known as a “stall-out”) occurs when a video stops playing mid-way, pauses to reload buffer data, then resumes.

🧪 Industry context

  • Experts often discuss a 1% buffer‑time ratio, which might sound low—but in reality, that means about 25% of 30‑second viewers will experience at least one stall.

  • According to Mux, rebuffering encompasses all stalls during playback, and is measured by frequency, count, and duration.

 

🚀 SmartVideo’s performance

  • Across the industry, roughly 25% of all playback experiences include a stall (≈25 out of 100 viewers).

  • With SmartVideo, that rate drops to under 3%—meaning only about 3 out of 100 viewers stall during playback.

The SmartVideo player works to keep viewers out of that stall window by delivering video from our CDN and adapting the bitrate during playback, so a slow or fluctuating connection downshifts quality instead of stopping the video. 🙌

 

✅ Why this matters

  • Better viewer retention: Fewer stalls mean fewer viewers abandoning your video.

  • Enhanced engagement: Smooth playback keeps viewers watching longer, boosting conversions.

  • Superior user experience: Reliable performance fosters trust and brand credibility.

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