Android ffmpeg rtmp（source code）

Posted 2020-09-27 长风破浪会有时，直挂云帆济沧海

souce code:

 

android.mk

　　编译生成APK需要调用的so文件

 

LOCAL_PATH:= $(call my-dir)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavcodec
LOCAL_SRC_FILES:= lib/libavcodec-57.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavformat
LOCAL_SRC_FILES:= lib/libavformat-57.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libswscale
LOCAL_SRC_FILES:= lib/libswscale-4.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavutil
LOCAL_SRC_FILES:= lib/libavutil-55.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libavfilter
LOCAL_SRC_FILES:= lib/libavfilter-6.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

include $(CLEAR_VARS)
LOCAL_MODULE:= libswresample
LOCAL_SRC_FILES:= lib/libswresample-2.so
LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)/include
include $(PREBUILT_SHARED_LIBRARY)

#Program
include $(CLEAR_VARS)
#LOCAL_ALLOW_UNDEFINED_SYMBOLS := true
LOCAL_MODULE := hello
LOCAL_SRC_FILES := main.c
LOCAL_C_INCLUDES += $(LOCAL_PATH)/include
LOCAL_LDLIBS := -llog -lz
LOCAL_SHARED_LIBRARIES :=avcodec avdevice avfilter avformat avutil postproc swresample swscaleinclude $(BUILD_SHARED_LIBRARY)

 

 

C语言实现文件
　　编写C、C++文件实现底层的逻辑功能，最终编译为so文件被java调用

 1 #include <jni.h>
 2 #include <stdio.h>
 3 #include "include/libavcodec/avcodec.h"
 4 #include "include/libavformat/avformat.h"
 5 #include "include/libavfilter/avfilter.h"
 6 
 7 jstring JNICALL Java_com_example_zhaohu_test_MainActivity_stringFromJNI
 8   (JNIEnv *env, jobject jObj)
 9   {
10       char info[1000]= { 0 };
11       AVFormatContext* pFormatCtx = NULL;
12       av_register_all();
13       avformat_network_init();
14       pFormatCtx = avformat_alloc_context();
15       //char* url="/storage/emulated/0/1.mp4";
16       char* url="rtmp://live.hkstv.hk.lxdns.com/live/hks";
17 
18 //      if(avformat_open_input(&pFormatCtx,url,NULL,NULL) != 0)
19 //      {
20 //          return (*env)->NewStringUTF(env,"open url failed!");
21 //      }
22       int ret = avformat_open_input(&pFormatCtx,url,NULL,NULL);
23       //char buf[1024] = { 0 };
24       //av_strerror(ret,buf,1024);
25       //sprintf(info,"Couldn‘t open file %s: %d(%s)\n",url,ret,buf);
26       //return (*env)->NewStringUTF(env,info);
27 
28       if(!pFormatCtx)
29           return (*env)->NewStringUTF(env,"pFormat is NULL!");
30 
31       if(avformat_find_stream_info(pFormatCtx,NULL) < 0)
32       {
33           return (*env)->NewStringUTF(env,"Did not find info");
34       }
35       int videoIndex = -1;
36       int i;
37       for (i = 0; i <pFormatCtx->nb_streams ; ++i)
38       {
39         if(pFormatCtx->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO)
40         {
41             videoIndex = i;
42             break;
43         }
44       }
45       if(videoIndex == -1)
46       {
47           return (*env)->NewStringUTF(env,"Did not find video steam!");
48       }
49 
50       AVCodecContext* pCodecCtx = pFormatCtx->streams[videoIndex]->codec;
51       AVCodec* pCodec = avcodec_find_decoder(pCodecCtx->codec_id);
52 
53       if(pCodec == NULL)
54           return (*env)->NewStringUTF(env,"Did not find video decoder");
55 
56       if(avcodec_open2(pCodecCtx,pCodec,NULL) < 0)
57       {
58           return (*env)->NewStringUTF(env,"avcodec_open2 failed!");
59       }
60 
61 
62       //sprintf(info,"%s\n",avcodec_configuration());
63       sprintf(info,"[Input:] %s\n",url);
64       sprintf(info,"%s[Format:] %s\n",info,pFormatCtx->iformat->name);
65       sprintf(info,"%s[codec:] %s\n",info,pCodecCtx->codec->name);
66       sprintf(info,"%s[Resolution:] %dx%d\n",info,pCodecCtx->width,pCodecCtx->height);
67      return (*env)->NewStringUTF(env,info);
68   }
69 
70 /*
71  * Class:     com_example_zhaohu_test_MainActivity
72  * Method:    unimplementedStringFromJNI
73  * Signature: ()Ljava/lang/String;
74  */
75 jstring JNICALL Java_com_example_zhaohu_test_MainActivity_unimplementedStringFromJNI
76   (JNIEnv *env, jobject jObj)
77   {
78     return (*env)->NewStringUTF(env,"Java_com_example_zhaohu_test_MainActivity_unimplementedStringFromJNI");
79   }

 

实现Android代码

　　调用C，C++的实现文件

package com.example.zhaohu.test;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final TextView infoText = (TextView)findViewById(R.id.info);
        //infoText.setText("This is My Test");

        infoText.setText(stringFromJNI());
    }

    public native String  stringFromJNI();
    public native String  unimplementedStringFromJNI();
    static {
        System.loadLibrary("avcodec-57");
        System.loadLibrary("avfilter-6");
        System.loadLibrary("avformat-57");
        System.loadLibrary("avutil-55");
        System.loadLibrary("swresample-2");
        System.loadLibrary("swscale-4");
        System.loadLibrary("hello");

    }
}