ffmpeg封装H264成MP4、AVI视频格式，及提取出png、jpg格式图片

[{"title":"（236个子文件19.75MB）ffmpeg封装H264成MP4、AVI视频格式，及提取出png、jpg格式图片","children":[{"title":"mainwindow.ui <span style='color:#111;'>25.95KB</span>","children":null,"spread":false},{"title":"mainwindow.cpp <span style='color:#111;'>4.83KB</span>","children":null,"spread":false},{"title":"MediaTools.pro <span style='color:#111;'>834B</span>","children":null,"spread":false},{"title":"avformat.lib <span style='color:#111;'>134.66KB</span>","children":null,"spread":false},{"title":"avcodec.lib <span style='color:#111;'>182.96KB</span>","children":null,"spread":false},{"title":"......","children":null,"spread":false},{"title":" <span style='color:steelblue;'>文件过多，未全部展示</span>","children":null,"spread":false}],"spread":true}]