PHDPeter/Lossless cutting of videos to small clips by OpenCv and FFMPG (PYTHON)

## Lossless cutting of videos to small clips by OpenCv and FFMPG (PYTHON)
Ok this is my first time realy playing with vidos so here it is.

FFMPG (Try)
SO the first issue I had here was getting the cuts to be lossless, i.e. cut on the fram you want not the nearsed key frame.
I started by trying to do this with FFMPG (and I am sure smarter pepole then me can get this to work) but this tended to be not quite lossless in that the number of total fmaes for each vido varired from video to vidoe.
For my needs I had to have tight control over the total number of frames so this would not work for me.
That said below is the FFMPG code that Iwas using:
  	stri = "ffmpeg  -ss  " +str(start_in_sec)+" -i " + str(input)+" -vcodec "+str(codec) +" -c:a libmp3lame "+ " -to " +str(end_in_sec) + " -c copy " +str(output)

As the code I am doing is in python I this call will need to be used with os.system(command) .
The big noite here is that the -ss  needs to be called first, as this sets the keyframs closer to the start_in_sec frame that you want.

openCV (Solve)


bad frames

testing
	Ok this is my first time realy playing with vidos so here it is.

	FFMPG (Try)
	SO the first issue I had here was getting the cuts to be lossless, i.e. cut on the fram you want not the nearsed key frame.
	I started by trying to do this with FFMPG (and I am sure smarter pepole then me can get this to work) but this tended to be not quite lossless in that the number of total fmaes for each vido varired from video to vidoe.
	For my needs I had to have tight control over the total number of frames so this would not work for me.
	That said below is the FFMPG code that Iwas using:
	stri = "ffmpeg -ss " +str(start_in_sec)+" -i " + str(input)+" -vcodec "+str(codec) +" -c:a libmp3lame "+ " -to " +str(end_in_sec) + " -c copy " +str(output)

	As the code I am doing is in python I this call will need to be used with os.system(command) .
	The big noite here is that the -ss needs to be called first, as this sets the keyframs closer to the start_in_sec frame that you want.

	openCV (Solve)



	bad frames

	testing