接上一篇。
activity_flv.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".FlvActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="horizontal">
<Button
android:id="@+id/take_button"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:text="open"/>
<SurfaceView
android:id="@+id/surfaceView1"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_weight="1"/>
</LinearLayout>
</FrameLayout>
最后偷懶貼個(gè)圖build.gradle
忘記上jni文件了，直接走起
#include
#include"libavcodec/avcodec.h"
#include"libavformat/avformat.h"
#include"libavutil/time.h"
#ifdefANDROID
#include
#include
#defineLOGE(format, ...)? __android_log_print(ANDROID_LOG_ERROR,"(>_<)",format, ##__VA_ARGS__)
#defineLOGI(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
AVFormatContext*ofmt_ctx;
AVStream* video_st;
AVCodecContext* pCodecCtx;
AVCodec* pCodec;
AVPacketenc_pkt;
AVFrame*pFrameYUV;
intframecnt =0;
intyuv_width;
intyuv_height;
inty_length;
intuv_length;
int64_tstart_time;
//Output FFmpeg's av_log()
voidcustom_log(void*ptr,intlevel,const char* fmt,va_listvl){
FILE*fp=fopen("/storage/emulated/0/av_log.txt","a+");
if(fp){
vfprintf(fp,fmt,vl);
fflush(fp);
fclose(fp);
}
}
JNIEXPORTjintJNICALLJava_csupport_lyjq_com_csupport_FlvActivity_initial
(JNIEnv*env,jobjectobj,jintwidth,jintheight)
{
const char* out_path ="/storage/emulated/0/testffmpeg.flv";
yuv_width=width;
yuv_height=height;
y_length=width*height;
uv_length=width*height/4;
//FFmpeg av_log() callback
av_log_set_callback(custom_log);
av_register_all();
//output initialize
avformat_alloc_output_context2(&ofmt_ctx,NULL,"flv", out_path);
//output encoder initialize
pCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
if(!pCodec){
LOGE("Can not find encoder!\n");
return-1;
}
pCodecCtx = avcodec_alloc_context3(pCodec);
pCodecCtx->pix_fmt=AV_PIX_FMT_YUV420P;
pCodecCtx->width= width;
pCodecCtx->height= height;
pCodecCtx->time_base.num=1;
pCodecCtx->time_base.den=30;
pCodecCtx->bit_rate=800000;
pCodecCtx->gop_size=300;
/* Some formats want stream headers to be separate. */
if(ofmt_ctx->oformat->flags&AVFMT_GLOBALHEADER)
pCodecCtx->flags|=CODEC_FLAG_GLOBAL_HEADER;
//H264 codec param
//pCodecCtx->me_range = 16;
//pCodecCtx->max_qdiff = 4;
//pCodecCtx->qcompress = 0.6;
pCodecCtx->qmin=10;
pCodecCtx->qmax=51;
//Optional Param
pCodecCtx->max_b_frames=3;
// Set H264 preset and tune
AVDictionary*param =0;
av_dict_set(?m,"preset","ultrafast",0);
av_dict_set(?m,"tune","zerolatency",0);
if(avcodec_open2(pCodecCtx, pCodec, ?m) <0){
LOGE("Failed to open encoder!\n");
return-1;
}
//Add a new stream to output,should be called by the user before avformat_write_header() for muxing
video_st = avformat_new_stream(ofmt_ctx, pCodec);
if(video_st ==NULL){
return-1;
}
video_st->time_base.num=1;
video_st->time_base.den=30;
video_st->codec= pCodecCtx;
//Open output URL,set before avformat_write_header() for muxing
if(avio_open(&ofmt_ctx->pb, out_path,AVIO_FLAG_READ_WRITE) <0){
LOGE("Failed to open output file!\n");
return-1;
}
//Write File Header
avformat_write_header(ofmt_ctx,NULL);
start_time = av_gettime();
return0;
}
JNIEXPORTjintJNICALLJava_csupport_lyjq_com_csupport_FlvActivity_encode
(JNIEnv*env,jobjectobj,jbyteArrayyuv)
{
intret;
intenc_got_frame=0;
inti=0;
pFrameYUV = av_frame_alloc();
uint8_t*out_buffer = (uint8_t*)av_malloc(avpicture_get_size(AV_PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height));
avpicture_fill((AVPicture*)pFrameYUV, out_buffer,AV_PIX_FMT_YUV420P, pCodecCtx->width, pCodecCtx->height);
//?????????????NV21????????????????YUV420P???
jbyte* in= (jbyte*)(*env)->GetByteArrayElements(env,yuv,0);
memcpy(pFrameYUV->data[0],in,y_length);
for(i=0;i
{
*(pFrameYUV->data[2]+i)=*(in+y_length+i*2);
*(pFrameYUV->data[1]+i)=*(in+y_length+i*2+1);
}
pFrameYUV->format=AV_PIX_FMT_YUV420P;
pFrameYUV->width= yuv_width;
pFrameYUV->height= yuv_height;
enc_pkt.data=NULL;
enc_pkt.size=0;
av_init_packet(&enc_pkt);
ret = avcodec_encode_video2(pCodecCtx, &enc_pkt, pFrameYUV, &enc_got_frame);
av_frame_free(&pFrameYUV);
if(enc_got_frame ==1){
LOGI("Succeed to encode frame: %5d\tsize:%5d\n", framecnt, enc_pkt.size);
framecnt++;
enc_pkt.stream_index= video_st->index;
//Write PTS
AVRationaltime_base = ofmt_ctx->streams[0]->time_base;//{ 1, 1000 };
AVRationalr_framerate1 = {60,2};//{ 50, 2 };
AVRationaltime_base_q = {1,AV_TIME_BASE};
//Duration between 2 frames (us)
int64_tcalc_duration = (double)(AV_TIME_BASE)*(1/ av_q2d(r_framerate1));//???????
//Parameters
//enc_pkt.pts = (double)(framecnt*calc_duration)*(double)(av_q2d(time_base_q)) / (double)(av_q2d(time_base));
enc_pkt.pts= av_rescale_q(framecnt*calc_duration, time_base_q, time_base);
enc_pkt.dts= enc_pkt.pts;
enc_pkt.duration= av_rescale_q(calc_duration, time_base_q, time_base);//(double)(calc_duration)*(double)(av_q2d(time_base_q)) / (double)(av_q2d(time_base));
enc_pkt.pos= -1;
//Delay
int64_tpts_time = av_rescale_q(enc_pkt.dts, time_base, time_base_q);
int64_tnow_time = av_gettime() - start_time;
if(pts_time > now_time)
av_usleep(pts_time - now_time);
ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt);
av_free_packet(&enc_pkt);
}
return0;
}
JNIEXPORTjintJNICALLJava_csupport_lyjq_com_csupport_FlvActivity_flush
(JNIEnv*env,jobjectobj)
{
intret;
intgot_frame;
AVPacketenc_pkt;
if(!(ofmt_ctx->streams[0]->codec->codec->capabilities&
CODEC_CAP_DELAY))
return0;
while(1) {
enc_pkt.data=NULL;
enc_pkt.size=0;
av_init_packet(&enc_pkt);
ret = avcodec_encode_video2(ofmt_ctx->streams[0]->codec, &enc_pkt,
NULL, &got_frame);
if(ret <0)
break;
if(!got_frame){
ret =0;
break;
}
LOGI("Flush Encoder: Succeed to encode 1 frame!\tsize:%5d\n", enc_pkt.size);
//Write PTS
AVRationaltime_base = ofmt_ctx->streams[0]->time_base;//{ 1, 1000 };
AVRationalr_framerate1 = {60,2};
AVRationaltime_base_q = {1,AV_TIME_BASE};
//Duration between 2 frames (us)
int64_tcalc_duration = (double)(AV_TIME_BASE)*(1/ av_q2d(r_framerate1));//???????
//Parameters
enc_pkt.pts= av_rescale_q(framecnt*calc_duration, time_base_q, time_base);
enc_pkt.dts= enc_pkt.pts;
enc_pkt.duration= av_rescale_q(calc_duration, time_base_q, time_base);
//???PTS/DTS??Convert PTS/DTS??
enc_pkt.pos= -1;
framecnt++;
ofmt_ctx->duration= enc_pkt.duration* framecnt;
/* mux encoded frame */
ret = av_interleaved_write_frame(ofmt_ctx, &enc_pkt);
if(ret <0)
break;
}
//Write file trailer
av_write_trailer(ofmt_ctx);
return0;
}
JNIEXPORTjintJNICALLJava_csupport_lyjq_com_csupport_FlvActivity_close
(JNIEnv*env,jobjectobj)
{
if(video_st)
avcodec_close(video_st->codec);
avio_close(ofmt_ctx->pb);
avformat_free_context(ofmt_ctx);
return0;
}
效果圖，生成的flv文件在sd卡根目錄下
