Android平台实现mp4文件实时推送RTMP|轻量级RTSP服务|GB28181平台

好多开发者有这样的诉求，想把本地录制的MP4文件，以实时流数据的形式，推送到RTMP服务器，注入轻量级RTSP服务，或者对接到GB28181平台，这块前几年我们就有对接。

本次以MediaExtractor为例，先利用MediaExtractor，把mp4文件的音视频数据分离，然后调用我们publisher模块，实现编码后的数据对接到RTMP服务器、轻量级RTSP服务或GB28181平台即可，废话不多说，上代码，由于实例代码比较简单，不再赘述用法：

/*
* SmartPublisherActivity.java
* Github: https://github.com/daniulive/SmarterStreaming
*/  
private void InitMediaExtractor(){
File mFile = new File("/storage/emulated/0/","2022.mp4");

if (!mFile.exists()){
Log.e(TAG, "mp4文件不存在");
return;
    }

MediaExtractor mediaExtractor = new MediaExtractor();
try {
mediaExtractor.setDataSource(mFile.getAbsolutePath());
    } catch (IOException e) {
e.printStackTrace();
    }

int count = mediaExtractor.getTrackCount();//获取轨道数量
Log.e(TAG, "轨道数量 = "+count);

for (int i = 0; i < count; i++)
    {
MediaFormat trackFormat = mediaExtractor.getTrackFormat(i);
String mineType = trackFormat.getString(MediaFormat.KEY_MIME);
Log.e(TAG, i + "编号通道格式 = " + mineType);

//视频信道
if (mineType.startsWith("video/")) {
video_track_index = i;
is_has_video = true;

try {
video_media_extractor.setDataSource(mFile.getAbsolutePath());
        } catch (IOException e) {
e.printStackTrace();
        }

if(mineType.equals("video/avc"))
        {
video_codec_id = 1;
        }
else if(mineType.equals("video/hevc"))
        {
video_codec_id = 2;
        }

int width = trackFormat.getInteger(MediaFormat.KEY_WIDTH);
int height = trackFormat.getInteger(MediaFormat.KEY_HEIGHT);
long duration = trackFormat.getLong(MediaFormat.KEY_DURATION);//总时间
int video_fps = trackFormat.getInteger(MediaFormat.KEY_FRAME_RATE);//帧率
max_sample_size = trackFormat.getInteger(MediaFormat.KEY_MAX_INPUT_SIZE);//获取视频缓存输出的最大大小

Log.e(TAG, "video width " + width + ", height: " + height + ", duration: " + duration + ", max_sample_size: " + max_sample_size + ", fps: " + video_fps);
      }

//音频信道
if (mineType.startsWith("audio/")) {
audio_track_index = i;
is_has_audio = true;

try {
audio_media_extractor.setDataSource(mFile.getAbsolutePath());
        } catch (IOException e) {
e.printStackTrace();
        }


if(mineType.equals("audio/mp4a-latm"))
        {
audio_codec_id = 0x10002;
        }

audio_sample_rate = trackFormat.getInteger(MediaFormat.KEY_SAMPLE_RATE);//获取采样率
int audioTrackBitrate = trackFormat.getInteger(MediaFormat.KEY_BIT_RATE);      //获取比特率
int channels = trackFormat.getInteger(MediaFormat.KEY_CHANNEL_COUNT);       //获取声道数量

Log.e(TAG, "mp4 audio_sample_rate " + audio_sample_rate + ", audioTrackBitrate: " + audioTrackBitrate + ", channels: "