If you have MP4 files and you have only copied the codecs, these will probably be choppy and out of sync. Otherwise, you can go directly to the fourth. Generally, it works with some of them, but if your video is encoded in h.264 and AAC 5 In the second case, I make a simple copy of the audio and video codecs. 
I can only put some suggestions like this 3įfmpeg -i originalVideo.mp4 -ss 01:34:50 -to 02:22:50 -c:v libx264 -preset ultrafast -qp 0 -c:a libmp3lame -b:a 160k -ac 2 -ar 44100 newStream1.mp4Īnother solution that save time and storage resources is 4įfmpeg -i originalVideo.mp4 -ss 01:34:50 -to 02:22:50 -codec:v copy -codec:a copy newStream1.mp4 The choice of the best encoding process is complicated and strictly connected to the user's needs.
Execute a FFmpeg command-line with the timestamp for every selection. For example, 01:34:50.1 means 1 hour, 34 minutes and 50.1 seconds. 
Of course, you can use ones, just remember that the format must be saved in HH:MM:SS.S. I use my favorite video player: mplayer with the "o" key (Toggle OSD states: none / seek / seek + timer / seek + timer + total time).
Find the start and finish timestamp of the element to preserve. There are many softwares that can help us to download the videos on Internet (if the website or browser add-on doesn't allow it), for example 4K Video Downloader and to edit them like many open source video editing programs like Avidemux 1Īlthough today our computers are enough powerful to process a video stream and our local storages have a lot of free gigabytes to store them, I think in many cases we don’t need video editing software to cut and join videos: FFmpeg 2Īnd with the following four steps it is possible to remove the useless pieces of an MP4 video: Or just a little part of them if they contain useless pieces. At the same time we might have the necessity to store some of them in our local stores. Internet gives us daily many contents, with an increasing amount of video sources: podcasts, video-sharing websites, lectures and so on. FFmpeg and the command-line can cut and join the video in four steps copying the same video and audio codec even on an MP4 video encoded in h.264 and AAC. How many times do we have to fix a video removing the parts that we don’t need? There are a lot of video editing programs that solve this elementary issue, including great open source ones, but generally, they require processing the video and audio streams and so a lot of resources.
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