Hi, i just wrote some tools that use "liblav" to do some effects on AVI video streams that are captured with "lavrec".
Thay are available at: http://www.s.netic.de/tmohr/lavfilter.tar.bz2 The name is kind of misleading. The tools can do: - pngblend: blend two streams into a final one. - pngoverlay: overlay some PNG pictures over a video stream - pngtrans: do some transitions between several AVI streams I'd be glad to hear any comments on those tools. Best regards, Torsten. Here's an example on how to start them: #! /bin/bash # These tools are slow, because the convert the AVI streams to RGB # values. This takes some time... # This one takes a stream from left side "-l file" and a stream from # right side "-r file" outputs it to "-o file". the left side of the # output stream (0 to -n xvalue) comes from the left stream, the # right side (-m xvalue to maximum width) comes from the right stream. # All values between -n x1 to -m x2 are mixed. # No sound at the moment. # ./pngblend -l ../lav_examples/file1.avi -r ../lav_examples/file2.avi \ # -n 354 -m 414 -o qq.avi # This one works like the example above, except that a "-p picture.png" # is used to decide from where a value comes (black:left - white:right). # Inbetween values are interpolated. # No sound at the moment. # ./pngblend -l ../lav_examples/file1.avi -r ../lav_examples/file2.avi \ # -o qq.avi -p ../lav_examples/bfile.png # These examples take an input stream and overlay a PNG file that comes # from "-p mask". An offset (-a) can be set to a offset (where the # overlay starts). # Sound is just copied to the output stream. # ./pngoverlay -p ../lav_examples/in/%04d.png -b 1 -e 15 \ # -i ../lav_examples/in.avi -o out.avi -a 1 #./pngoverlay -p ../lav_examples/in/%04d.png -b 1 -e 15 \ # -i /vid/volltreffer1.avi -o out.avi -a 1 #./pngoverlay -p ../lav_examples/in/%04d.png -b 1 -e 15 \ # -i ../lav_examples/peanuts.avi -o out.avi -a 1 # This one puts the output into "-o res.avi". # The order of the command line parameters matters. # There are parameters that describe an input stream: # -f input file name # -b begin frame number # -e end frame number (negative values are counted from the end) # # There are parameters that describe a "transition" from one stream to # another (or to/from video:black / sound:quiet): # -v number: video transition lasts "number" frames # -s number: sound transition lasts "number" frames # -a number: video offset # -b number: sound offset # # Example: file1 has frames 1 to 50, file2 has frames 1 to 70. If the # video transition between those two is 15, the resulting video sequence # is like this: # frames 1 to 34 from file1 # frames 35 to 50 are mixed with frames 1 to 15 from file2 # frames 51 to 105 from file2 # # If a video offset is given, e.g. 7 it all looks like this: # frames 1 to 41 from file1 # frames 42 to 57 are mixed with frames 1 to 15 from file2 # frames 58 to 105 from file2 #./pngtrans -o res.avi \ #-v 50 -s 50 \ #-f ../lav_examples/peanuts.avi -b 13 -e 150 \ #-a 50 -v 20 -s 20 \ #-f ../lav_examples/cc1.avi -b 26 -e 150 \ #-v 50 -s 50 ------------------------------------------------------- This SF.net email is sponsored by: Scholarships for Techies! Can't afford IT training? All 2003 ictp students receive scholarships. Get hands-on training in Microsoft, Cisco, Sun, Linux/UNIX, and more. www.ictp.com/training/sourceforge.asp _______________________________________________ Mjpeg-users mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/mjpeg-users
