Inaccurate problem of flutter fijkplayer seekto

ijkplayer and ffplay In the open rtmp Streaming video , Most people will encounter 5~10 Second delay , stay ffplay When the play , If you add -fflags nobuffer It can shorten the playback rtmp Video delay in 1s Inside , And in the IjkMediaPlayer Add

mediaPlayer.setOption(1, "analyzemaxduration", 100L);  
mediaPlayer.setOption(1, "probesize", 10240L);  
mediaPlayer.setOption(1, "flush_packets", 1L);  
mediaPlayer.setOption(4, "packet-buffering", 0L);  
mediaPlayer.setOption(4, "framedrop", 1L);  

1: Set whether to turn on tone change

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER,"soundtouch",isModifyTone?0:1);

2: Set whether to turn on loop filtering : 0 Turn on , High picture quality , High decoding overhead ,48 close , Poor picture quality , Low decoding overhead

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_CODEC,"skip_loop_filter",isSkipLoopFilter?0:48L);

3: Set the maximum detection time before playing

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT,"analyzemaxduration",100L);

4: Set the detection time before playing 1, Achieve the first screen second on effect

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT,"analyzeduration",1);

5: Detection before playback Size, The default is 1M, A little smaller will make the picture faster

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT,"probesize",1024*10);

6: Every time I deal with one packet Then refresh io Context

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT,"flush_packets",1L);

7: Whether to turn on pre buffering , Generally, live broadcast projects will be opened , Achieve the effect of seconds on , However, it brings the experience of playing frame dropping and blocking

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER,"packet-buffering",isBufferCache?1:0);

8: Playback reconnection times

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER,"reconnect",5);

9: Maximum buffer size , Company kb

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER,"max-buffer-size",maxCacheSize);

10: Frame skipping , discharge CPU When processing is slow , Do frame skipping , Make sure the playback process , Picture and sound synchronization

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER,"framedrop",5);

11: Maximum fps

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER,"max-fps",30);

12: Set the hard decoding method

jkPlayer Support hard decoding and soft decoding . The video angle will not be rotated during soft decoding. You need to pass it at this time onInfo Of what == IMediaPlayer.MEDIA_INFO_VIDEO_ROTATION_CHANGED To get the angle , Rotate the picture by yourself . Or turn on hard decoding , However, hard decoding is easy to cause black screen silence （ Hardware compatibility issues ）, The following is the code related to setting hard decoding

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "mediacodec", 1);

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "mediacodec-auto-rotate", 1);

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "mediacodec-handle-resolution-change", 1);

13.SeekTo Set optimization

Some videos are SeekTo When , Will jump back to the position before dragging , This is because of the key frame of the video , Popular is FFMPEG Are not compatible , Video compression is too strong ,seek Only key frames are supported , This occurs in the original video file i Fewer frames

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "enable-accurate-seek", 1);

14. solve m3u8 File drag problem such as : One 3 How many hours of audio files , Start playing for a few seconds , Then drag to 2 About an hour or so , want loading 10 minute

mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "fflags", "fastseek");// Set up seekTo Can fast seek Go to the specified location and play 

Important records , List of questions

1. After setting , High bit rate m3u8 Play Caton , The sound and picture are not synchronized , Or just pictures , No sound , Or the sound and picture are not synchronized

// Some videos are SeekTo When , Will jump back to the position before dragging , This is because of the key frame of the video , Popular is FFMPEG Are not compatible , Video compression is too strong ,seek Only key frames are supported , This occurs in the original video file i  Fewer frames 
mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_PLAYER, "enable-accurate-seek", 1);
// Detection before playback Size, The default is 1M,  A little smaller will make the picture faster 
mediaPlayer.setOption(IjkMediaPlayer.OPT_CATEGORY_FORMAT, "probesize", 1024 * 10);

reference Android That's it