![]() ![]() Is this the kind of task ffmpeg or mencoder can be bent to?ĭoes anybody have a technique for doing this? Also, it's entirely possible that this is an impossible task because of some fundamental ignorance I have of the h.264 codec. It should take only a short amount of time if the screenshot is taken in the beginning of the video. Run this script after you have uploaded the file. The simplest code is: ffmpeg -i input.mp4 -ss 00:00:01.000 -vframes 1 output.png. If such a tool isn't available, I have the feeling this could probably be done by rolling a custom encoder with libavcodec, but I'd rather use a higher-level (and preferably scriptable) tool to do the job if a GUI isn't possible. I do not know a way to make a screenshot WHILE uploading, but I do know how to do it after. Ideally in some kind of GUI which would let me scrub to a frame, mark it as a keyframe, and then (re)encode my video. In order to do this skipping as efficiently as possible, I need to force the target frames to be i-frames at encode time. I do, however, know the target frames in advance. create-keyframe JSON Processing Create css keyframes using JSON by chinedufn JavaScript Updated: 4 years ago - Current License: No License. kandi ratings - Low support, No Bugs, No Vulnerabilities. ![]() Since these frames will fall at unpredictable intervals, I can't use the standard "keyframe every N frames/seconds" functionality present in most video encoders. Implement create-keyframe with how-to, Q&A, fixes, code snippets. I have a video sequence that I'd like to skip to specific frames at playback-time (my player is implemented using AVPlayer in iOS, but that's incidental).
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