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Andy 1a636d3db5 fix(drm): add zero-KID fallback for mp4decrypt and clear HLS track.drm after download
mp4decrypt silently copies files unchanged when the tenc box default KID is all zeros, since none of the real KID:KEY pairs match. Add zero-KID fallback entries to both Widevine and PlayReady mp4decrypt methods, matching what Shaka Packager already does.

Also clear track.drm after HLS download when decryption was performed, preventing unnecessary double-decryption. DASH and URL descriptors already did this.
2026-03-25 14:39:21 -06:00
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