本文记录一个安卓平台下基于FFmpeg的视频推流器。该推流器C语言的源代码来自于《最简单的基于FFMPEG的推流器》。相关的概念就不再重复记录了。
源代码
项目的目录结构如图所示。Java源代码位于src目录，而C代码位于jni目录。
Android程序Java端代码位于src\com\leixiaohua1020\sffmpegandroidstreamer\MainActivity.java，如下所示。
/**
* 最简单的基于FFmpeg的推流器(RTMP)-安卓
* Simplest FFmpeg Android Streamer (RTMP)
*
* 雷霄骅 Lei Xiaohua
* [email protected]
* 中国传媒大学/数字电视技术
* Communication University of China / Digital TV Technology
* http://blog.csdn.net/leixiaohua1020
*
* 本程序是安卓平台下最简单的基于FFmpeg的推流器。
* 它可以将视频文件以流媒体的形式推送到服务器。
*
* This software is the simplest streamer based on FFmpeg in Android.
* It can stream local media file to streaming media server (in RTMP).
*
*/
package com.leixiaohua1020.sffmpegandroidstreamer;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button startButton = (Button) this.findViewById(R.id.button_start);
final EditText urlEdittext_input= (EditText) this.findViewById(R.id.input_url);
final EditText urlEdittext_output= (EditText) this.findViewById(R.id.output_url);
startButton.setOnClickListener(new OnClickListener() {
public void onClick(View arg0){
String folderurl=Environment.getExternalStorageDirectory().getPath();
String urltext_input=urlEdittext_input.getText().toString();
String inputurl=folderurl+"/"+urltext_input;
String outputurl=urlEdittext_output.getText().toString();
Log.e("inputurl",inputurl);
Log.e("outputurl",outputurl);
String info="";
stream(inputurl,outputurl);
Log.e("Info",info);
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
//JNI
public native int stream(String inputurl, String outputurl);
static{
System.loadLibrary("avutil-54");
System.loadLibrary("swresample-1");
System.loadLibrary("avcodec-56");
System.loadLibrary("avformat-56");
System.loadLibrary("swscale-3");
System.loadLibrary("postproc-53");
System.loadLibrary("avfilter-5");
System.loadLibrary("avdevice-56");
System.loadLibrary("sffstreamer");
}
}
C语言端源代码位于jni/simplest_ffmpeg_streamer.c，如下所示。
/**
* 最简单的基于FFmpeg的推流器-安卓
* Simplest FFmpeg Android Streamer
*
* 雷霄骅 Lei Xiaohua
* [email protected]
* 中国传媒大学/数字电视技术
* Communication University of China / Digital TV Technology
* http://blog.csdn.net/leixiaohua1020
*
* 本程序是安卓平台下最简单的基于FFmpeg的流媒体推送器。
* 它可以将视频数据以流媒体的形式发送出去。
*
* This software is the simplest streamer based on FFmpeg in Android.
* It can stream local media file to streaming media server (in RTMP).
*/
#include <stdio.h>
#include <time.h>
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavutil/log.h"
#ifdef ANDROID
#include <jni.h>
#include <android/log.h>
#define LOGE(format, ...) __android_log_print(ANDROID_LOG_ERROR, "(>_<)", format, ##__VA_ARGS__)
#define LOGI(format, ...) __android_log_print(ANDROID_LOG_INFO, "(^_^)", format, ##__VA_ARGS__)
#else
#define LOGE(format, ...) printf("(>_<) " format "\n", ##__VA_ARGS__)
#define LOGI(format, ...) printf("(^_^) " format "\n", ##__VA_ARGS__)
#endif
//Output FFmpeg‘s av_log()
void custom_log(void *ptr, int level, const char* fmt, va_list vl){
//To TXT file
FILE *fp=fopen("/storage/emulated/0/av_log.txt","a+");
if(fp){
vfprintf(fp,fmt,vl);
fflush(fp);
fclose(fp);
}
//To Logcat
//LOGE(fmt, vl);
}
JNIEXPORT jint JNICALL Java_com_leixiaohua1020_sffmpegandroidstreamer_MainActivity_stream
(JNIEnv *env, jobject obj, jstring input_jstr, jstring output_jstr)
{
AVOutputFormat *ofmt = NULL;
AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL;
AVPacket pkt;
int ret, i;
char input_str[500]={0};
char output_str[500]={0};
char info[1000]={0};
sprintf(input_str,"%s",(*env)->GetStringUTFChars(env,input_jstr, NULL));
sprintf(output_str,"%s",(*env)->GetStringUTFChars(env,output_jstr, NULL));
//input_str = "cuc_ieschool.flv";
//output_str = "rtmp://localhost/publishlive/livestream";
//output_str = "rtp://233.233.233.233:6666";
//FFmpeg av_log() callback
av_log_set_callback(custom_log);
av_register_all();
//Network
avformat_network_init();
//Input
if ((ret = avformat_open_input(&ifmt_ctx, input_str, 0, 0)) < 0) {
LOGE( "Could not open input file.");
goto end;
}
if ((ret = avformat_find_stream_info(ifmt_ctx, 0)) < 0) {
LOGE( "Failed to retrieve input stream information");
goto end;
}
int videoindex=-1;
for(i=0; i<ifmt_ctx->nb_streams; i++)
if(ifmt_ctx->streams[i]->codec->codec_type==AVMEDIA_TYPE_VIDEO){
videoindex=i;
break;
}
//Output
avformat_alloc_output_context2(&ofmt_ctx, NULL, "flv",output_str); //RTMP
//avformat_alloc_output_context2(&ofmt_ctx, NULL, "mpegts", output_str);//UDP
if (!ofmt_ctx) {
LOGE( "Could not create output context\n");
ret = AVERROR_UNKNOWN;
goto end;
}
ofmt = ofmt_ctx->oformat;
for (i = 0; i < ifmt_ctx->nb_streams; i++) {
//Create output AVStream according to input AVStream
AVStream *in_stream = ifmt_ctx->streams[i];
AVStream *out_stream = avformat_new_stream(ofmt_ctx, in_stream->codec->codec);
if (!out_stream) {
LOGE( "Failed allocating output stream\n");
ret = AVERROR_UNKNOWN;
goto end;
}
//Copy the settings of AVCodecContext
ret = avcodec_copy_context(out_stream->codec, in_stream->codec);
if (ret < 0) {
LOGE( "Failed to copy context from input to output stream codec context\n");
goto end;
}
out_stream->codec->codec_tag = 0;
if (ofmt_ctx->oformat->flags & AVFMT_GLOBALHEADER)
out_stream->codec->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
//Open output URL
if (!(ofmt->flags & AVFMT_NOFILE)) {
ret = avio_open(&ofmt_ctx->pb, output_str, AVIO_FLAG_WRITE);
if (ret < 0) {
LOGE( "Could not open output URL ‘%s‘", output_str);
goto end;
}
}
//Write file header
ret = avformat_write_header(ofmt_ctx, NULL);
if (ret < 0) {
LOGE( "Error occurred when opening output URL\n");
goto end;
}
int frame_index=0;
int64_t start_time=av_gettime();
while (1) {
AVStream *in_stream, *out_stream;
//Get an AVPacket
ret = av_read_frame(ifmt_ctx, &pkt);
if (ret < 0)
break;
//FIX：No PTS (Example: Raw H.264)
//Simple Write PTS
if(pkt.pts==AV_NOPTS_VALUE){
//Write PTS
AVRational time_base1=ifmt_ctx->streams[videoindex]->time_base;
//Duration between 2 frames (us)
int64_t calc_duration=(double)AV_TIME_BASE/av_q2d(ifmt_ctx->streams[videoindex]->r_frame_rate);
//Parameters
pkt.pts=(double)(frame_index*calc_duration)/(double)(av_q2d(time_base1)*AV_TIME_BASE);
pkt.dts=pkt.pts;
pkt.duration=(double)calc_duration/(double)(av_q2d(time_base1)*AV_TIME_BASE);
}
//Important:Delay
if(pkt.stream_index==videoindex){
AVRational time_base=ifmt_ctx->streams[videoindex]->time_base;
AVRational time_base_q={1,AV_TIME_BASE};
int64_t pts_time = av_rescale_q(pkt.dts, time_base, time_base_q);
int64_t now_time = av_gettime() - start_time;
if (pts_time > now_time)
av_usleep(pts_time - now_time);
}
in_stream = ifmt_ctx->streams[pkt.stream_index];
out_stream = ofmt_ctx->streams[pkt.stream_index];
/* copy packet */
//Convert PTS/DTS
pkt.pts = av_rescale_q_rnd(pkt.pts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
pkt.dts = av_rescale_q_rnd(pkt.dts, in_stream->time_base, out_stream->time_base, AV_ROUND_NEAR_INF|AV_ROUND_PASS_MINMAX);
pkt.duration = av_rescale_q(pkt.duration, in_stream->time_base, out_stream->time_base);
pkt.pos = -1;
//Print to Screen
if(pkt.stream_index==videoindex){
LOGE("Send %8d video frames to output URL\n",frame_index);
frame_index++;
}
//ret = av_write_frame(ofmt_ctx, &pkt);
ret = av_interleaved_write_frame(ofmt_ctx, &pkt);
if (ret < 0) {
LOGE( "Error muxing packet\n");
break;
}
av_free_packet(&pkt);
}
//Write file trailer
av_write_trailer(ofmt_ctx);
end:
avformat_close_input(&ifmt_ctx);
/* close output */
if (ofmt_ctx && !(ofmt->flags & AVFMT_NOFILE))
avio_close(ofmt_ctx->pb);
avformat_free_context(ofmt_ctx);
if (ret < 0 && ret != AVERROR_EOF) {
LOGE( "Error occurred.\n");
return -1;
}
return 0;
}
Android.mk文件位于jni/Android.mk，如下所示。
# Android.mk for FFmpeg # # Lei Xiaohua 雷霄骅 # [email protected] # http://blog.csdn.net/leixiaohua1020 # LOCAL_PATH := $(call my-dir) # FFmpeg library include $(CLEAR_VARS) LOCAL_MODULE := avcodec LOCAL_SRC_FILES := libavcodec-56.so include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := avdevice LOCAL_SRC_FILES := libavdevice-56.so include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := avfilter LOCAL_SRC_FILES := libavfilter-5.so include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := avformat LOCAL_SRC_FILES := libavformat-56.so include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := avutil LOCAL_SRC_FILES := libavutil-54.so include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := postproc LOCAL_SRC_FILES := libpostproc-53.so include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := swresample LOCAL_SRC_FILES := libswresample-1.so include $(PREBUILT_SHARED_LIBRARY) include $(CLEAR_VARS) LOCAL_MODULE := swscale LOCAL_SRC_FILES := libswscale-3.so include $(PREBUILT_SHARED_LIBRARY) # Program include $(CLEAR_VARS) LOCAL_MODULE := sffstreamer LOCAL_SRC_FILES :=simplest_ffmpeg_streamer.c LOCAL_C_INCLUDES += $(LOCAL_PATH)/include LOCAL_LDLIBS := -llog -lz LOCAL_SHARED_LIBRARIES := avcodec avdevice avfilter avformat avutil postproc swresample swscale include $(BUILD_SHARED_LIBRARY)
运行结果
App在手机上运行后的结果如下图所示。
推流后的视频可以在电脑端使用ffplay接收，如下图所示。
下载
simplest ffmpeg mobile
项目主页
Github：https://github.com/leixiaohua1020/simplest_ffmpeg_mobile
开源中国：https://git.oschina.net/leixiaohua1020/simplest_ffmpeg_mobile
CSDN工程下载地址：http://download.csdn.net/detail/leixiaohua1020/8924391
本解决方案包含了使用FFmpeg在移动端处理多媒体的各种例子：
[Android]
simplest_android_player: 基于安卓接口的视频播放器
simplest_ffmpeg_android_helloworld: 安卓平台下基于FFmpeg的HelloWorld程序
simplest_ffmpeg_android_decoder: 安卓平台下最简单的基于FFmpeg的视频解码器
simplest_ffmpeg_android_decoder_onelib: 安卓平台下最简单的基于FFmpeg的视频解码器-单库版
simplest_ffmpeg_android_streamer: 安卓平台下最简单的基于FFmpeg的推流器
simplest_ffmpeg_android_transcoder: 安卓平台下移植的FFmpeg命令行工具
simplest_sdl_android_helloworld: 移植SDL到安卓平台的最简单程序
[IOS]
simplest_ios_player: 基于IOS接口的视频播放器
simplest_ffmpeg_ios_helloworld: IOS平台下基于FFmpeg的HelloWorld程序
simplest_ffmpeg_ios_decoder: IOS平台下最简单的基于FFmpeg的视频解码器
simplest_ffmpeg_ios_streamer: IOS平台下最简单的基于FFmpeg的推流器
simplest_ffmpeg_ios_transcoder: IOS平台下移植的ffmpeg.c命令行工具
simplest_sdl_ios_helloworld: 移植SDL到IOS平台的最简单程序
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时间： 2024-10-08 10:28:58