Problem : How to concatenate (join) multiple MP4 video files into one file interactively? There are a lot of programs that do this for two files from the command line. For instance : ffmpeg, ...
Is it possible to set the -q:a parameter to a negative value? For example, the value of -1 is a valid quality level for the Vorbis codec.
Someone suggested I direct a copy of the unmodified X display to a file and afterwards convert that file to a general purpose video file. What commands would I use to do this on a Kubuntu system? ...
I know really little about encoding and using avconv / ffmpeg. I am trying to downsample a video as follows: avconv -i blah_in.avi -s 640x360 -pass 1 blah.avi avconv -i blah_in.avi -s 640x360 -pass 2 ...
I have figured out so far that you can cut a section from a video with avconv with a command like this (cuts from 1:00-3:00): avconv -ss 00:01:00 -i "input.avi" -t 00:02:00 -c:v libx264 -crf 23 ...