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Advances, Systems and Applications

Journal of Cloud Computing Cover Image

Table 8 The parameters in online prediction experiments with Twitch

From: Online architecture for predicting live video transcoding resources

Parameter Description
Video source Online live video from Twitch. Resolution: 1280 × 720, Video format: HLS (segment length: 1 s)
Prediction algorithms RF, RL, RL with multiple RL agents (4)
Reference vCPU request = x%*vCPU limit
Online model training Every 30 min
Target Transcoding speed > 1.0
vCPU limit 2 vCPU = 256 × 144 (197 kbps), 3 vCPU = 640 × 360 (829 kbps), 4 vCPU = 854 × 480 (1380 kbps)
vCPU request 35%*vCPU limit for VM with 4 vCPU, 45%*vCPU limit for VM with 6 and 8 vCPU, 50%*vCPU limit for VM with 16 vCPU
Video URL source Twitch Stream API (v5) [55]
Video URL conversion Streamlink [56]