小编pre*_*ron的帖子

我想通过以下代码从图像序列(在Android上)创建视频:

    opencv_core.IplImage image = cvLoadImage("/sdcard/mytest/testimage.jpg");
    FFmpegFrameRecorder recorder = new FFmpegFrameRecorder("/sdcard/mytest/test.3gp",256,256);
    try {
        recorder.setCodecID( CODEC_ID_H263);
        recorder.setFormat("3gp");
        recorder.setPixelFormat(  PIX_FMT_YUV420P);
        recorder.start();
        for (int i=0;i<10;i++)
          {
            recorder.record(image);
          }
        recorder.stop();
       }
    catch (Exception e){
        e.printStackTrace();
      }

但我没有我的形象,我有绿屏.我的代码中需要更改什么？

以及如何为我的视频添加音频？

如何在recyclelerView向下滚动时折叠后隐藏工具栏,在recyclelerView向上滚动时显示工具栏,并在列表末尾展开CollapsingToolbarLayout？现在,CollapsingToolbarLayout只会崩溃,工具栏会在滚动时显示所有时间.

<android.support.design.widget.CoordinatorLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/coordinatorlayout"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".screens.MainActivity">

    <android.support.design.widget.AppBarLayout
        android:id="@+id/appbarlayout"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:fitsSystemWindows="true"
        android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">

        <android.support.design.widget.CollapsingToolbarLayout
            android:id="@+id/collapsing_toolbar"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:fitsSystemWindows="true"
            android:minHeight="@dimen/actionBarHeight"
            app:contentScrim="@color/colorPrimary"
            app:expandedTitleTextAppearance="@style/TransparentText"
            app:layout_scrollFlags="scroll|exitUntilCollapsed">

            <ImageView
                android:id="@+id/toolbar_image"
                android:layout_width="match_parent"
                android:layout_height="180dp"
                android:adjustViewBounds="true"
                android:background="#229944"
                android:contentDescription="@null"
                android:scaleType="fitCenter"/>

            <android.support.v7.widget.Toolbar
                android:id="@+id/toolbar"
                android:layout_width="match_parent"
                android:layout_height="@dimen/actionBarHeight"
                android:minHeight="@dimen/actionBarHeight"
                app:layout_collapseMode="pin"
                app:layout_scrollFlags="scroll|enterAlwaysCollapsed"
                app:popupTheme="@style/ThemeOverlay.AppCompat.Light"/>

        </android.support.design.widget.CollapsingToolbarLayout>

        <android.support.design.widget.TabLayout
            android:id="@+id/tabs"
            android:layout_width="match_parent"
            android:layout_height="?attr/actionBarSize"
            android:layout_gravity="bottom"
            app:layout_scrollFlags="scroll" />

    </android.support.design.widget.AppBarLayout>

    <android.support.v7.widget.RecyclerView
        android:id="@+id/content"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior"/>

</android.support.design.widget.CoordinatorLayout>