Find . Change the value from the default (usually 300) to 1000 or 2000 (this creates a 1 to 2-second buffer). Click Save and restart VLC. Summary Troubleshooting Checklist Primary Cause Black screen with audio Missing H.265 decoder pipeline Install Microsoft HEVC Extension or update VLC. Video stutters / drops frames High CPU bottleneck Turn on DXVA2.0/VideoToolbox hardware acceleration. Crash upon opening file Corrupted program files or bad cache Reset VLC preferences or install K-Lite Codec Pack.
If HEVC video is lagging or showing a black screen, enabling hardware decoding can help: Preferences Input / Codecs Hardware-accelerated decoding and change it to Direct3D11 Video Acceleration (on Windows) or and restart VLC. 3. Windows-Specific "HEVC Video Extensions" install hevc codec for vlc