How to use gstreamer to save webcam video to file?

问题:

I've been trying to get emgu to save same webcam video to file

The problem is opencv only ssupports avi, and avi does not seem to suit a format like X264 very well.

Could I use Gstreamer to do this for me in C?

It would be good if I could choose the file format and container type too. It would be good if I could use a format like schrodinger dirac.

I'm new to GStreamer so I'm not quite sure if I'm on the right track here.

EDIT

I've managed to capture the webcam video using

gst-launch-0.10 ksvideosrc ! autovideosink

Now how to transcode this to a format like H264 or dirac ...?

EDIT

gst-launch-0.10 ksvideosrc num-buffers=10 ! decodebin2 ! ffmpegcolorspace ! x264enc ! matroskamux ! filesink location=video.mkv

This seems to create a file, but VLC player can't read it.

回答1:

This pipeline captures video from webcam, encodes it in h264 and finally uses flv container to store it at any specified location.

gst-launch-1.0 v4l2src ! videoconvert ! x264enc ! flvmux ! filesink location=xyz.flv

Hope this helps

回答2:

This

gst-launch-0.10

ksvideosrc !  
decodebin2 !      
ffmpegcolorspace !
schronc ! 
matroskamux ! 
filesink location=gopro2.mkv

Seems to handle dirac encoding

And this

gst-launch-0.10 ksvideosrc num-buffers=500 ! decodebin2 ! ffmpegcolorspace ! x264enc ! mp4mux ! filesink location=gopro2.mp4

Handles x264

回答3:

This directly captures the video from webcam and writes as an avi file which will be played-back by VLC player.

   gst-launch v4l2src ! ffmpegcolorspace ! jpegenc ! avimux ! filesink location=output.avi

Hope this help!