一、 下载编译
gitclonehttps://github.com/Bilibili/ijkplayer.git ijkplayer-android
cd ijkplayer-android
git checkout -B latest k0.8.8
二、初始化系统配置
./init-android.sh
cd config/
ls # 查看文件清单
module-default.sh module-lite-hevc.sh module-lite.shmodule.sh
先删除modelu.sh rm -r module.sh
修改module-lite.sh 中配置项 vim module-lite.sh中添加如下配置
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=rtsp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=sdp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-demuxer=rtp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=rtp"
export COMMON_FF_CFG_FLAGS="$COMMON_FF_CFG_FLAGS --enable-protocol=tcp"
保存退出。执行以下命令
rm module.sh
ln -s module-lite.sh module.sh #创建软连接
三、开始修改相关源码
该命令有可能会出现module.sh中遗漏，因此对比下module-lite.sh是否与module.sh一致
降低延时编译，修改ff_ffplay.c文件 进入目录cd ijkmedia/ijkplayer/ 修改ff_ffplay.c文件
修改其中packet_queue_get_or_buffering方法 如下：
static int packet_queue_get_or_buffering(FFPlayer *ffp, PacketQueue *q, AVPacket *pkt, int *serial, int finished)
{
while (1) {
int new_packet = packet_queue_get(q, pkt, 1, serial);
if (new_packet < 0){
new_packet = packet_queue_get(q, pkt, 0, serial);
if(new_packet < 0)
return -1;
} else if (new_packet == 0) {
if (!finished)
ffp_toggle_buffering(ffp, 1);
new_packet = packet_queue_get(q, pkt, 1, serial);
if (new_packet < 0)
return -1;
}
if (finished == *serial) {
av_free_packet(pkt);
continue;
} else {
break;
}
}
return 1;
}
修改此处方法编译测试发现视频播放还是存在一秒左右的延时，达不到预计效果，则继续修改vp_duration方法 ，如下：
static double vp_duration(VideoState *is, Frame *vp, Frame *nextvp) {
/* if (vp->serial == nextvp->serial) {
double duration = nextvp->pts - vp->pts;
if (isnan(duration) || duration <= 0 || duration > is->max_frame_duration)
return vp->duration;
else
return duration;
} else {
return 0.0;
}*/
return vp->duration;
}
直接return；修改ffplay_video_thread方法：
static int ffplay_video_thread(void *arg)
{
FFPlayer *ffp = arg;
VideoState *is = ffp->is;
AVFrame *frame = av_frame_alloc();
double pts;
double duration;
int ret;
AVRational tb = is->video_st->time_base;
//AVRational frame_rate = av_guess_frame_rate(is->ic, is->video_st, NULL);
int64_t dst_pts = -1;
int64_t last_dst_pts = -1;
int retry_convert_image = 0;
int convert_frame_count = 0;
#if CONFIG_AVFILTER
AVFilterGraph *graph = avfilter_graph_alloc();
AVFilterContext *filt_out = NULL, *filt_in = NULL;
int last_w = 0;
int last_h = 0;
enum AVPixelFormat last_format = -2;
int last_serial = -1;
int last_vfilter_idx = 0;
if (!graph) {
av_frame_free(&frame);
return AVERROR(ENOMEM);
}
#else
ffp_notify_msg2(ffp, FFP_MSG_VIDEO_ROTATION_CHANGED, ffp_get_video_rotate_degrees(ffp));
#endif
if (!frame) {
#if CONFIG_AVFILTER
avfilter_graph_free(&graph);
#endif
return AVERROR(ENOMEM);
}
for (;;) {
ret = get_video_frame(ffp, frame);
if (ret < 0)
goto the_end;
if (!ret)
continue;
if (ffp->get_frame_mode) {
if (!ffp->get_img_info || ffp->get_img_info->count <= 0) {
av_frame_unref(frame);
continue;
}
last_dst_pts = dst_pts;
if (dst_pts < 0) {
dst_pts = ffp->get_img_info->start_time;
} else {
dst_pts += (ffp->get_img_info->end_time - ffp->get_img_info->start_time) / (ffp->get_img_info->num - 1);
}
pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
pts = pts * 1000;
if (pts >= dst_pts) {
while (retry_convert_image <= MAX_RETRY_CONVERT_IMAGE) {
ret = convert_image(ffp, frame, (int64_t)pts, frame->width, frame->height);
if (!ret) {
convert_frame_count++;
break;
}
retry_convert_image++;
av_log(NULL, AV_LOG_ERROR, "convert image error retry_convert_image = %d\n", retry_convert_image);
}
retry_convert_image = 0;
if (ret || ffp->get_img_info->count <= 0) {
if (ret) {
av_log(NULL, AV_LOG_ERROR, "convert image abort ret = %d\n", ret);
ffp_notify_msg3(ffp, FFP_MSG_GET_IMG_STATE, 0, ret);
} else {
av_log(NULL, AV_LOG_INFO, "convert image complete convert_frame_count = %d\n", convert_frame_count);
}
goto the_end;
}
} else {
dst_pts = last_dst_pts;
}
av_frame_unref(frame);
continue;
}
#if CONFIG_AVFILTER
if ( last_w != frame->width
|| last_h != frame->height
|| last_format != frame->format
|| last_serial != is->viddec.pkt_serial
|| ffp->vf_changed
|| last_vfilter_idx != is->vfilter_idx) {
SDL_LockMutex(ffp->vf_mutex);
ffp->vf_changed = 0;
av_log(NULL, AV_LOG_DEBUG,
"Video frame changed from size:%dx%d format:%s serial:%d to size:%dx%d format:%s serial:%d\n",
last_w, last_h,
(const char *)av_x_if_null(av_get_pix_fmt_name(last_format), "none"), last_serial,
frame->width, frame->height,
(const char *)av_x_if_null(av_get_pix_fmt_name(frame->format), "none"), is->viddec.pkt_serial);
avfilter_graph_free(&graph);
graph = avfilter_graph_alloc();
if ((ret = configure_video_filters(ffp, graph, is, ffp->vfilters_list ? ffp->vfilters_list[is->vfilter_idx] : NULL, frame)) < 0) {
// FIXME: post error
SDL_UnlockMutex(ffp->vf_mutex);
goto the_end;
}
filt_in = is->in_video_filter;
filt_out = is->out_video_filter;
last_w = frame->width;
last_h = frame->height;
last_format = frame->format;
last_serial = is->viddec.pkt_serial;
last_vfilter_idx = is->vfilter_idx;
//frame_rate = av_buffersink_get_frame_rate(filt_out);
SDL_UnlockMutex(ffp->vf_mutex);
}
ret = av_buffersrc_add_frame(filt_in, frame);
if (ret < 0)
goto the_end;
while (ret >= 0) {
is->frame_last_returned_time = av_gettime_relative() / 1000000.0;
ret = av_buffersink_get_frame_flags(filt_out, frame, 0);
if (ret < 0) {
if (ret == AVERROR_EOF)
is->viddec.finished = is->viddec.pkt_serial;
ret = 0;
break;
}
is->frame_last_filter_delay = av_gettime_relative() / 1000000.0 - is->frame_last_returned_time;
if (fabs(is->frame_last_filter_delay) > AV_NOSYNC_THRESHOLD / 10.0)
is->frame_last_filter_delay = 0;
tb = av_buffersink_get_time_base(filt_out);
#endif
//duration = (frame_rate.num && frame_rate.den ? av_q2d((AVRational){frame_rate.den, frame_rate.num}) : 0);
duration = 0.01;
pts = (frame->pts == AV_NOPTS_VALUE) ? NAN : frame->pts * av_q2d(tb);
ret = queue_picture(ffp, frame, pts, duration, frame->pkt_pos, is->viddec.pkt_serial);
av_frame_unref(frame);
#if CONFIG_AVFILTER
}
#endif
if (ret < 0)
goto the_end;
}
the_end:
#if CONFIG_AVFILTER
avfilter_graph_free(&graph);
#endif
av_log(NULL, AV_LOG_INFO, "convert image convert_frame_count = %d\n", convert_frame_count);
av_frame_free(&frame);
return 0;
}
该方法是直接修改duration 等于0.01即可。修改完善
编译测试播放视频延时在500ms左右，预计效果
四、编译
cd ..
cd android/contrib/
./compile-ffmpeg.sh clean
./compile-ffmpeg.sh all
等待编译，编译需要一定时间，相关联库只要安装完善，编译应是正常，若出现库确实，重新安装再次编译即可
编译完成之后，编译Android 库
cd ..
./compile-ijk.sh all # all编译所有平台的库
五、使用
在jniLibs中加入编译平台的so
初始化属性：
IjkMediaPlayer.loadLibrariesOnce(null);
IjkMediaPlayer.native_profileBegin("libijkplayer.so");
ijkMediaPlayer = new IjkMediaPlayer();
ijkMediaPlayer.setLogEnabled(false);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "analyzemaxduration", 100L);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "probesize", 10240L);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "flush_packets", 1L);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "packet-buffering", 0L);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "framedrop", 1L);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "rtsp_transport", "tcp");
//ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "framedrop", 60);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "max-fps", 0);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "fps", 30);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_CODEC, "skip_loop_filter", 48);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "overlay-format", IjkMediaPlayer.SDL_FCC_YV12);
//ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "packet-buffering", 0);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "fflags", "nobuffer");
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "max-buffer-size", 1024);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "min-frames", 10);
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "start-on-prepared", 1);
// ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "probsize", "4096");
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "analyzeduration", "2000000");
ijkMediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT,"http-detect-range-support",0);
至此整个编译完成。
参考文献
https://blog.csdn.net/qq_19317197/article/details/83084631
