如何准确地分割长GOP视频（H264 / XDCAM ...）与FFMPEG？ [英] How to split accurately a LONG GOP video (h264/XDCAM...) with FFMPEG?

问题描述

我的目标是分割XDCAM或H264视频，精确到帧，与ffmpeg的。
我想，这个问题来自于它的长GOP结构，但是我正在寻找一种方式，而不重新编码它分割视频。
我申请的偏移量为en code只有视频的特定部分（让说从10秒到媒体的结尾）
任何想法？

My goal is to split a XDCAM or a H264 video, frame-accurately, with ffmpeg. I guess that the problem comes from its long GOP structure, but I'm looking for a way to split the video without re-encoding it. I apply an offset to encode only a specific section of the video (let say from the 10th second to the end of the media) Any ideas ?

推荐答案

我真的不知道，如果有可能通过1通与ffmpeg的事，但2-3

I`m not sure if it possible to do by 1 pass with ffmpeg, but 2-3

第1次：你刚才转储原始帧到文件
第2次：你会发现与指数＆LT封闭的GOP（mxdcam）/ IDR帧（H264）;要启动帧=指数

1st pass: you just dump raw frames to file 2nd pass: you find closed gop(mxdcam)/idr frame (h264) with index <= index of frame you want to start

如果索引等于你就可以开始复用。否则，你需要从封闭的GOP / IDR帧去code sequense下一关GOP你想/ IDR帧和连接code起始帧

in case indexes equal you can start mux. otherwise you need to decode sequense from closed gop/idr frame to next closed gop/idr frame and encode starting frame you want

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