音视频实践学习
- android全平台编译ffmpeg以及x264与fdk-aac实践
- ubuntu下使用nginx和nginx-rtmp-module配置直播推流服务器
- android全平台编译ffmpeg合并为单个库实践
- android-studio使用cmake编译ffmpeg实践
- android全平台下基于ffmpeg解码MP4视频文件为YUV文件
- android全平台编译ffmpeg支持命令行实践
- android全平台基于ffmpeg解码本地MP4视频推流到RTMP服务器
- android平台下音频编码之编译LAME库转码PCM为MP3
- ubuntu平台下编译vlc-android视频播放器实践
- 图解YU12、I420、YV12、NV12、NV21、YUV420P、YUV420SP、YUV422P、YUV444P的区别
- 图解RGB565、RGB555、RGB16、RGB24、RGB32、ARGB32等格式的区别
- YUV420P、YUV420SP、NV12、NV21和RGB互相转换并存储为JPEG以及PNG图片
- android全平台编译libyuv库实现YUV和RGB的转换
- android平台下基于ffmpeg对相机采集的NV21数据编码为MP4视频文件
- android平台下基于ffmpeg采集Camera数据编码成H.264推流到RTMP服务器
- android平台下基于ffmpeg和ANativeWindow实现简单的视频播放器
- android平台下基于ffmpeg实现对相机预览截图的功能(NV21数据编码为JPEG文件)
- android平台下基于ffmpeg的swscale模块实现对YUV和RGB数据进行转换
- android平台下基于MediaRecorder和AudioRecord实现录制AAC、PCM音频数据
本文目录
概述
还是先从最简单的搞起来，先从最基本的视频推流开始，要知道在电脑上使用ffmpeg完成推流，简直不要太简单，直接使用ffmpeg的推流命令即可，今天想在android平台实践一下，具体操作大家也可以看看雷神的博客。
ffmpeg -re -i input.mp4 -vcodec copy -f flv rtmp://192.168.1.102:1935/onzhou/live
配置环境
操作系统: ubuntu 16.05
注意: ffmpeg库的编译使用的是android-ndk-r10e版本，使用高版本编译会报错。
而android-studio工程中配合cmake使用的版本则是android-ndk-r16b版本
image
新建工程ffmpeg-single-streamer
image
-
build.gradle配置比较简单，可以参考之前的文章 -
新建
CMakeLists.txt文件，配置如下
cmake_minimum_required(VERSION 3.4.1)
add_library(ffmpeg-streamer
SHARED
src/main/cpp/ffmpeg_streamer.c)
find_library(log-lib
log)
#获取上级目录
get_filename_component(PARENT_DIR ${CMAKE_SOURCE_DIR} PATH)
set(LIBRARY_DIR ${PARENT_DIR}/ffmpeg-single)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=gnu++11")
set(CMAKE_VERBOSE_MAKEFILE on)
add_library(ffmpeg-single
SHARED
IMPORTED)
set_target_properties(ffmpeg-single
PROPERTIES IMPORTED_LOCATION
${LIBRARY_DIR}/libs/${ANDROID_ABI}/libffmpeg.so
)
#头文件
include_directories(${LIBRARY_DIR}/libs/${ANDROID_ABI}/include)
target_link_libraries(ffmpeg-streamer ffmpeg-single ${log-lib})
- 新建
NowStreamer.java文件
package com.onzhou.ffmpeg.streamer;
public class NowStreamer {
static {
System.loadLibrary("ffmpeg");
System.loadLibrary("ffmpeg-streamer");
}
public native int startPublish(String input, String output);
}
- 在
src/main/cpp目录新建源文件ffmpeg_streamer.c
#include <jni.h>
#include <stdio.h>
#include <time.h>
#include "libavcodec/avcodec.h"
#include "libavformat/avformat.h"
#include "libavfilter/avfilter.h"
#include "libavutil/log.h"
#ifdef ANDROID
#include <android/log.h>
#include <libavutil/time.h>
#define LOG_TAG "NowStreamer"
#define LOGE(format, ...) __android_log_print(ANDROID_LOG_ERROR, LOG_TAG, format, ##__VA_ARGS__)
#define LOGI(format, ...) __android_log_print(ANDROID_LOG_INFO, LOG_TAG, format, ##__VA_ARGS__)
#else
#define LOGE(format, ...) printf(LOG_TAG format "\n", ##__VA_ARGS__)
#define LOGI(format, ...) printf(LOG_TAG format "\n", ##__VA_ARGS__)
#endif
//输出日志
void log_callback(void *ptr, int level, const char *fmt, va_list vl) {
//写入日志文件
FILE *fp = fopen("/storage/emulated/0/av_log.txt", "a+");
if (fp) {
vfprintf(fp, fmt, vl);
fflush(fp);
fclose(fp);
}
//LOGE(fmt, vl);
}
JNIEXPORT jint JNICALL Java_com_onzhou_ffmpeg_streamer_NowStreamer_startPublish
(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));
//日志回调写入文件
av_log_set_callback(log_callback);
av_register_all();
//网络初始化
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;
}
推流服务器的搭建，可以参考之前的文章
public void onStartClick(View view) {
if (nowStreamer == null) {
nowStreamer = new NowStreamer();
}
if (publishDisposable == null) {
publishDisposable = Schedulers.newThread().scheduleDirect(new Runnable() {
@Override
public void run() {
//推流本地的一个mp4文件
final File intputVideo = new File(getExternalFilesDir(null), "input.mp4");
nowStreamer.startPublish(intputVideo.getAbsolutePath(), PUBLISH_ADDRESS);
}
});
}
}
编译打包运行，开始推流，我们在局域网中使用vlc播放器，打开网络串流
rtmp://192.168.1.102:1935/onzhou/live
image
项目地址:
https://github.com/byhook/ffmpeg4android
原文地址:
https://blog.csdn.net/byhook/article/details/83592093
参考雷神:
https://blog.csdn.net/leixiaohua1020/article/details/47056051
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