c# - Webcam capture with directshow.net - performance -


i have performance issues capturing in directshow.net. using resolutions above 920x720 resulting in stutters on i5 dual core. logitech software record smooth on higher resolutions.

i use directshow.net capturing webcam , muxing in avi muxer audio input. file writer writes capture disk.

[webcam (logitech 920c)-> m-jpeg compressor] + microphone ->    -> avi-muxer -> file writer

webcam (logitech 920c)-> mjpegcompressor

the logitech software record smooth on higher resolutions.

logitech software supposedly capturing mjpeg right camera, without software compression. not stock windows m-jpeg compression being of substandard quality, problem usb 2.0 throughput: high resolution @ high rates can captured hardware compressed.

you need either of 2 or both:

  1. capture compressed video, m-jpeg or h.264, not raw
  2. look @ logitech software filter graph find out topology using

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