SetFFmpegAudioFilter

TVideoGrabber.SetFFmpegAudioFilter			Prev	Next
TVideoGrabber	Methods

enables a FFmpeg audio filter

Declaration
function SetFFmpegFilter (FilterIndex: LongInt; VideoFilterName: string; Parameters: string): Boolean;

bool __fastcall SetFFmpegFilter(System::LongInt FilterIndex, System::UnicodeString VideoFilterName, System::UnicodeString Parameters);

Description

Used to activate a FFmpeg audio filter.

Note: this feature requires the Datastead RTSP/RTMP/HTTP/ONVIF Source Filter to be installed.

Note: the filter must be an "in place" filter that outputs the same video format and video size than the input format.

Example to perform a voice masking:

VideoGrabber.SetFFmpegAudioFilter(0, "afftfilt", "real='hypot(re,im)':imag='0':win_size=2048:overlap=0.75:win_func=hann");

VideoGrabber.SetFFmpegAudioFilter(1, "asetrate", "52000");