Anamorphic 2.39:1 scaled to 1080 height = ~2586x1080 = 11016 MBs, busting level 4.1's 8192-MB MaxFS -> nvenc "InitializeEncoder failed: Invalid Level" (libx264: "frame MB size > level limit") -> 0 segments, session stalls. Most 4K rips are 2.39:1, so HLS playback was silently broken for them. H264LevelForFrame(w,h) derives the level from the real macroblock count (max of MB-tier and height-tier). hls.go computes output width and uses it. 16:9 unchanged; anamorphic bumps to 5.0 when needed. Discovered + verified during the trickplay smoke. |
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