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September 16, 2026: RTSP/RTMP/HTTP/ONVIF Source v9.4.2.2 released

RTSP/RTMP/HTTP/ONVIF DirectShow Source Filter 9.4.2.2 is available.

  • Fixed: recording an IP camera with an external audio capture device (TVideoGrabber AudioSource = as_UseExternalAudio, RTSP_Source_SetAudioDevice_str) failed with “failed to connect to URL”, in particular with cameras without audio.
  • Fixed: with an external audio capture device, the recorded audio was about 1 second behind the video. The audio delay setting (RTSP_AudioStream_DelayMs_int, URL parameter audiodelay) now also applies to the external audio device.
  • Fixed: recording pause/resume with re-encoded audio (e.g. external audio device), no audio after the resume and playback stalling at the resume point.
  • Fixed: recording pause/resume with external audio, the paused duration is no longer kept as a gap in the recorded file.
  • Fixed: a failed connection was reported as a generic error or as cancelled; the actual cause is now reported. A failure to open the external audio device is reported as “cannot open the audio capture device”.
  • Fixed: the application could freeze for up to 60 seconds when a camera whose connection had failed or timed out was stopped or closed.

Download | Full changelog