lm3515 / ijkplayer-track Goto Github PK

对于这个代码的解释有疑问：
//传递两个参数tracksNum：音轨的个数，stream_index：第几个音轨
ffp_set_stream_selected(ffp, tracksNum, stream_index);

我的理解：
//传递两个参数selected：切换为该音轨或者关闭该音轨，stream：第几个音轨
int ffp_set_stream_selected(FFPlayer *ffp, int stream, int selected)
{
VideoState *is = ffp->is;
AVFormatContext *ic = NULL;
AVCodecParameters *codecpar = NULL;
if (!is)
return -1;
ic = is->ic;
if (!ic)
return -1;

if (stream < 0 || stream >= ic->nb_streams) {
    av_log(ffp, AV_LOG_ERROR, "invalid stream index %d >= stream number (%d)\n", stream, ic->nb_streams);
    return -1;
}

codecpar = ic->streams[stream]->codecpar;
if (selected) {

//如果选择该sream，则会先关闭当前的音轨，并打开stream指向的音轨，然后返回打开音轨函数的返回值
switch (codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (stream != is->video_stream && is->video_stream >= 0)
stream_component_close(ffp, is->video_stream);
break;
case AVMEDIA_TYPE_AUDIO:
if (stream != is->audio_stream && is->audio_stream >= 0)
stream_component_close(ffp, is->audio_stream);
break;
case AVMEDIA_TYPE_SUBTITLE:
if (stream != is->subtitle_stream && is->subtitle_stream >= 0)
stream_component_close(ffp, is->subtitle_stream);
break;
default:
av_log(ffp, AV_LOG_ERROR, "select invalid stream %d of video type %d\n", stream, codecpar->codec_type);
return -1;
}
return stream_component_open(ffp, stream);
} else {
//如果没有选择，则会执行以下代码关闭该音轨，并返回0
switch (codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (stream == is->video_stream)
stream_component_close(ffp, is->video_stream);
break;
case AVMEDIA_TYPE_AUDIO:
if (stream == is->audio_stream)
stream_component_close(ffp, is->audio_stream);
break;
case AVMEDIA_TYPE_SUBTITLE:
if (stream == is->subtitle_stream)
stream_component_close(ffp, is->subtitle_stream);
break;
default:
av_log(ffp, AV_LOG_ERROR, "select invalid stream %d of audio type %d\n", stream, codecpar->codec_type);
return -1;
}
return 0;
}
}

Hi friend, thank you for this, but i have a question : Do I need to recompile again with ./compile-ffmpeg.sh ? Or just ./compile-ijk.sh

文件放在哪里使用，可以实现音轨切换？

大神你好，切换音轨时播放的音乐卡顿，有办法解决么？