![]() For audio parts to be sped up / slowed down, use the atempo filter, whose parameter is the speedup (e.g., 0.5 = half speed).If you wanted to speed up the video, use a multiplier lower than 1. For the video parts that need to be slowed down, every presentation timestamp is doubled ( 2*(…)), which effectively halves the speed of the video.Each part is given an output label (e.g.In each part a setpts/ asetpts filter is applied, which, when using the option PTS-STARTPTS, "resets" the presentation timestamps of each frame in each part, so that they can later be concatenated easily.The trim and atrim filters cut the video into different parts, from 0–2 seconds, from 2–5, and from 5 to the end. ![]() ![]() preset superfast -profile:v baseline output.mp4 ![]() This slows down one part of a video and keeps the rest as is. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |