sorry if this client top posts, but to answer, you can do 1 of 2 things. assume it is different and insert it before returning to the unprocessed clip. or you can check if they are different by doing a comparison.
Sent from my T-Mobile 4G LTE Device -------- Original message --------From: YIRAN LI <[email protected]> Date: 4/7/17 3:15 PM (GMT-08:00) To: "This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter." <[email protected]>, FFmpeg user questions <[email protected]> Subject: [Libav-user] re-encoding and transcode (codec copy) on same file. Hi guys, I'm investigating if it's possible to do editing and transcode on same file. I mean use -vcodec copy, we can readout packets and write them directly into output file without re-encoding. But if it's possible, for example if I have a 2 mins video, re-encode 1st min because there're some effects applied to that region but copy 2nd part? My concern is, for example we know H.264 has extradata, if I re-encode first part but keep 2nd part, how if new extradata is different from old extradta? Anyone have suggestion on this? and any other possible problems doing this? Thanks
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