Hello, Is it possible with ffmpeg to extract normally distributed N-frames (about 1000) sequence (normal distributed sample) from some file and pack it into another file with specified framerate? In more detail I need it in my encoding process: I need a way to get some sort of estimation of video content in input file which I can use next while I'll adjust encoding parameters. Also I want to be able to rapidly view this sequence in media player to understand how it looks like (that's why I need to specify output framerate).
The point here is to rapidly adjust parameters and understand how they affect into whole video based on this sample sequence. I can do the crf encoding of whole video and look what bitrate it shows, but it gets long time and also I need to view the result with my eyes. And when it's long file - the more time it requires. I try to make such things by myself but have no luck - the output framerate is not as I need (I need it to be as normal like 25 fps): ffmpeg -i source.mkv -vf "fps=fps=1/<Period>" -vframes 1000 -qp 0 -an -f yuv4mpegpipe pipe:1 > frames.yuv where <Period> - is video duration/num of frames in sequence. Here I use yuv to force not encode, just decode frames. Any suggestions? Thanks in advance! _______________________________________________ ffmpeg-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/ffmpeg-user
