IPTV Checker 2.5 is a lightweight desktop application that:
Memory fragmentation. Version 2.5 loads the entire M3U into RAM. Solution: Split your playlist using a lightweight tool first, or increase Windows page file size to 16GB. Alternatively, use the "Streaming URL Input" mode, which processes chunks rather than the whole file. iptv checker 2.5
Python 3.5+ / FFmpeg (for bitrate and resolution detection). IPTV Checker 2