blocks|key|911827|text|对于JNI，NDK/您可以从这开始。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|911828|然后检查用户(ph0b)所以发布关于JNI/NDK的文章|911829|那么android上的ffmpeg是一个相当高的要求，你需要一些时间。|911830|在github上搜索‘android’，寻找最高的社区评级(明星、克隆人)，并提供良好的构建说明。|911831|国际海事组织-“监护计划”和“半忍者”都很好。|911832|您可以在android之外花费一些时间(只需在VM上构建ffmpeg静态库)，因此您只熟悉ffmpeg上的配置/构建。|911833|然后，进入完整的安卓工作室，使用ph0b集成技术运行NDK/+builds构建，在他的博客文章中使用对gradle的修改。|911834|entityMap|0|LINK|mutability|MUTABLE|url|http://ph0b.com/android-studio-gradle-and-ndk-integration/#more-71^0|E|1|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|D|3|E|5|6|7|11|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|12|8|@]|9|@]|C|$]]|$1|H|3|I|5|6|7|13|8|@]|9|@]|C|$]]|$1|J|3|K|5|6|7|14|8|@]|9|@]|C|$]]|$1|L|3|M|5|6|7|15|8|@]|9|@]|C|$]]|$1|N|3|O|5|6|7|16|8|@]|9|@]|C|$]]|$1|P|3|-4|5|6|7|17|8|@]|9|@]|C|$]]]|Q|$R|$5|S|T|U|C|$V|W]]]]

for JNI, NDK/AS you could start with <a href="http://ph0b.com/android-studio-gradle-and-ndk-integration/#more-71" rel="nofollow">this</a>

and then check that users (ph0b) SO posts regarding JNI/NDK

Then ffmpeg on android is a pretty tall order for which you will need some time. 

Search 'android-ffmpeg' on github looking for highest community rating ( stars, clones, ) and with good build instructions. 

IMO - 'guardianproject' and 'halfninja' are good. 

You could spend some time outside of android ( just building ffmpeg static libs on a VM ) so you are familiar with just the config/build on ffmpeg.

Then, go to full android studio, using ph0b integration technique for running NDK/build inside gradle builds, using the alterations to gradle in his blog post.

blocks|key|2149509|text|在应用程序的build.gradle添加中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2149510|compile+'com.writingminds:FFmpegAndroid:0.3.2'|code-block|syntax|javascript|2149511|之后，添加一个按钮，用于选择视频路径，并在按钮的onClick方法中创建一个意图，帮助用户从手机中选择视频。|2149512|+Intent+intent+=+new+Intent(Intent.ACTION_PICK);
++++++++++++intent.setType("video/*");
++++++++++++intent.setAction(Intent.ACTION_GET_CONTENT);
++++++++++++startActivityForResult(Intent.createChooser(intent,+"Select+Video"),+PICK_CONTACT_REQUEST);|2149513|现在使用下面的方法返回上面的结果|2149514|++++protected+void+onActivityResult(int+requestCode,+int+resultCode,+Intent+data)+{
++++//+Check+which+request+we're+responding+to
++++if+(requestCode+==+PICK_CONTACT_REQUEST)+{
++++++++//+Make+sure+the+request+was+successful
++++++++if+(resultCode+==+RESULT_OK)+{
++++++++++++Uri+selectedImageUri+=+data.getData();

++++++++++++//+OI+FILE+Manager
++++++++++++String+filemanagerstring+=+selectedImageUri.getPath();


++++++++++++//+MEDIA+GALLERY

++++++++++++String+selectedImagePath+=getPath(selectedImageUri);
++++++++++++if+(selectedImagePath+!=+null)+{
++++++++++++++++String[]+cmd+=+{"-i"
++++++++++++++++++++++++,+selectedImagePath
++++++++++++++++++++++++,+"Image.gif"};
++++++++++++++++conversion(cmd);

++++++++++++}
++++++++}
++++}
}|2149515|定义getPath方法以获取所选视频的路径|2149516|+public+String+getPath(Uri+uri)+{
++++String[]+projection+=+{MediaStore.Images.Media.DATA};
++++Cursor+cursor+=+managedQuery(uri,+projection,+null,+null,+null);
++++if+(cursor+!=+null)+{
++++++++//+HERE+YOU+WILL+GET+A+NULLPOINTER+IF+CURSOR+IS+NULL
++++++++//+THIS+CAN+BE,+IF+YOU+USED+OI+FILE+MANAGER+FOR+PICKING+THE+MEDIA
++++++++int+column_index+=+cursor
++++++++++++++++.getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
++++++++cursor.moveToFirst();
++++++++return+cursor.getString(column_index);
++++}+else
++++++++return+null;
}|2149517|然后创建一个将视频转换为gif的方法。|2149518|+public+static+void+conversion(String[]+cmd)+{
++++FFmpeg+ffmpeg+=+FFmpeg.getInstance(this);

++++try+{


++++++++//+to+execute+"ffmpeg+-version"+command+you+just+need+to+pass+"-version"
++++++++ffmpeg.execute(cmd,+new+ExecuteBinaryResponseHandler()+{

++++++++++++@Override
++++++++++++public+void+onStart()+{
++++++++++++}

++++++++++++@Override
++++++++++++public+void+onProgress(String+message)+{
++++++++++++}

++++++++++++@Override
++++++++++++public+void+onFailure(String+message)+{
++++++++++++}

++++++++++++@Override
++++++++++++public+void+onSuccess(String+message)+{
++++++++++++}

++++++++++++@Override
++++++++++++public+void+onFinish()+{
++++++++++++}
++++++++});
++++}+catch+(FFmpegCommandAlreadyRunningException+e)+{
++++++++//+Handle+if+FFmpeg+is+already+running
++++++++e.printStackTrace();
++++}
}|2149519|您可以参考https://github.com/WritingMinds/ffmpeg-android-java|offset|length|2149520|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/WritingMinds/ffmpeg-android-java^0|0|0|0|0|0|0|0|0|0|0|5|1F|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|19|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1A|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|1B|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|1C|8|@]|9|@]|A|$]]|$1|M|3|N|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|O|3|P|5|6|7|1E|8|@]|9|@]|A|$]]|$1|Q|3|R|5|D|7|1F|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1G|8|@]|9|@]|A|$]]|$1|U|3|V|5|D|7|1H|8|@]|9|@]|A|$E|F]]|$1|W|3|X|5|6|7|1I|8|@]|9|@$Y|1J|Z|1K|1|1L]]|A|$]]|$1|10|3|-4|5|6|7|1M|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]]]

In your app's build.gradle add

<pre><code>compile 'com.writingminds:FFmpegAndroid:0.3.2'
</code></pre>

After that add a button for selecting the path of video and in the onClick method of the button create a intent that will help the user to select video from his phone 

<pre><code> Intent intent = new Intent(Intent.ACTION_PICK);
 intent.setType("video/*");
 intent.setAction(Intent.ACTION_GET_CONTENT);
 startActivityForResult(Intent.createChooser(intent, "Select Video"), PICK_CONTACT_REQUEST);
</code></pre>

Now retreive the above result using the below method

<pre><code> protected void onActivityResult(int requestCode, int resultCode, Intent data) {
 // Check which request we're responding to
 if (requestCode == PICK_CONTACT_REQUEST) {
 // Make sure the request was successful
 if (resultCode == RESULT_OK) {
 Uri selectedImageUri = data.getData();

 // OI FILE Manager
 String filemanagerstring = selectedImageUri.getPath();


 // MEDIA GALLERY

 String selectedImagePath =getPath(selectedImageUri);
 if (selectedImagePath != null) {
 String[] cmd = {"-i"
 , selectedImagePath
 , "Image.gif"};
 conversion(cmd);

 }
 }
 }
}
</code></pre>

define getPath method to get the path of selected video

<pre><code> public String getPath(Uri uri) {
 String[] projection = {MediaStore.Images.Media.DATA};
 Cursor cursor = managedQuery(uri, projection, null, null, null);
 if (cursor != null) {
 // HERE YOU WILL GET A NULLPOINTER IF CURSOR IS NULL
 // THIS CAN BE, IF YOU USED OI FILE MANAGER FOR PICKING THE MEDIA
 int column_index = cursor
 .getColumnIndexOrThrow(MediaStore.Images.Media.DATA);
 cursor.moveToFirst();
 return cursor.getString(column_index);
 } else
 return null;
}
</code></pre>

then Create a method to convert the video into gif

<pre><code> public static void conversion(String[] cmd) {
 FFmpeg ffmpeg = FFmpeg.getInstance(this);

 try {


 // to execute "ffmpeg -version" command you just need to pass "-version"
 ffmpeg.execute(cmd, new ExecuteBinaryResponseHandler() {

 @Override
 public void onStart() {
 }

 @Override
 public void onProgress(String message) {
 }

 @Override
 public void onFailure(String message) {
 }

 @Override
 public void onSuccess(String message) {
 }

 @Override
 public void onFinish() {
 }
 });
 } catch (FFmpegCommandAlreadyRunningException e) {
 // Handle if FFmpeg is already running
 e.printStackTrace();
 }
}
</code></pre>

you can refer to <a href="https://github.com/WritingMinds/ffmpeg-android-java" rel="nofollow noreferrer">https://github.com/WritingMinds/ffmpeg-android-java</a>

I am currently making a simple Androidapp that converts a video from the SD card into a gif.

I learnt ffmpeg is the most efficient method to handle the conversion. But I have no idea how to add ffmeg to my android studio project.

Use ffmpeg to Convert Video to Gif android studio

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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我目前正在制作一个简单的Androidapp，将SD卡上的视频转换为gif。我知道ffmpeg是处理转换的最有效的方法。但我不知道如何将ffmeg添加到我的android工作室项目中。

问使用ffmpeg将视频转换为Gif android工作室
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