Hi, Ionut.
When calling xVideo_ChannelResizeWindow function, may not work depending on the calling timing.
1st code, xVideo_ChannelResizeWindow function works correctly.
m_hStream = xVideo_StreamCreateFile((PVOID)lpFilePath, 0, hWnd,BASS_STREAM_DECODE | xVideo_UNICODE);
xVideo_ChannelSetWindow(m_hStream, 0, hVideoScreen);
xVideo_ChannelResizeWindow(m_hStream, 0, 0, 0, 100, 100);
m_hStream = BASS_FX_TempoCreate(m_hStream, BASS_FX_FREESOURCE);
BASS_ChannelSetAttribute(m_hStream, BASS_ATTRIB_TEMPO, 200.0f);
BASS_ChannelPlay(m_hStream,false);
2nd code, xVideo_ChannelResizeWindow function does not work correctly.
m_hStream = xVideo_StreamCreateFile((PVOID)lpFilePath, 0, hWnd,BASS_STREAM_DECODE | xVideo_UNICODE);
xVideo_ChannelSetWindow(m_hStream, 0, hVideoScreen);
m_hStream = BASS_FX_TempoCreate(m_hStream, BASS_FX_FREESOURCE);
xVideo_ChannelResizeWindow(m_hStream, 0, 0, 0, 100, 100);
BASS_ChannelSetAttribute(m_hStream, BASS_ATTRIB_TEMPO, 200.0f);
BASS_ChannelPlay(m_hStream,false);