qt - Qt qml MediaPlayer/Video 仅再现声音（无视频）
问题描述
我在 QML 中使用播放器，安装了 k-lite-codec 包并尝试播放 mp4 和 avi 视频格式，但它不播放它们，只有声音。为什么是这样？怎么了？
关闭应用程序后，我得到这个调试日志：
D3D11 WARNING: Process is terminating. Using simple reporting. Please call ReportLiveObjects() at runtime for standard reporting. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Producer at 0x03DBE8CC, Refcount: 8. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03E35D18, Refcount: 2. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DBF780, Refcount: 0. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03CE68C4, Refcount: 0. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DC56FC, Refcount: 0. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DC58D4, Refcount: 0. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DC5ACC, Refcount: 0. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DC5CC4, Refcount: 0. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DC6184, Refcount: 1. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DC6734, Refcount: 1. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object at 0x03DC6CE4, Refcount: 1. [ STATE_CREATION WARNING #0: UNKNOWN]
D3D11 WARNING: Live Object : 10 [ STATE_CREATION WARNING #0: UNKNOWN]
DXGI WARNING: Live Producer at 0x03D1C814, Refcount: 3. [ STATE_CREATION WARNING #0: ]
DXGI WARNING: Live Object at 0x03D4DCA0, Refcount: 3. [ STATE_CREATION WARNING #0: ]
DXGI WARNING: Live Object : 1 [ STATE_CREATION WARNING #0: ]
解决方案
由于您提到了 k-lite-codec，我假设您使用的是 Windows。检查是否可以在 Windows Media Player 中播放。如果不是（只有声音），那么您的系统中缺少必要的编解码器。