解决ffmpeg拉流转发频繁丢包问题max delay reached. need to consume packet

软件：

1、流媒体服务器EasyDarwin-windows-8.1.0-1901141151

2、ffmpeg-20181001-dcbd89e-win64-static

3、直播源：rtsp://192.168.1.168/0

4、流媒体服务器EasyDarwin地址rtsp://192.168.1.28/3

问题现象

[rtsp @ 0000000000122bc0] max delay reached. need to consume packet
[rtsp @ 0000000000122bc0] RTP: missed 33 packets
[rtsp @ 0000000000122bc0] max delay reached. need to consume packet
[rtsp @ 0000000000122bc0] RTP: missed 166 packets
[h264 @ 0000000002f4b280] out of range intra chroma pred mode
[h264 @ 0000000002f4b280] error while decoding MB 27 39
[h264 @ 0000000002f4b280] concealing 502 DC, 502 AC, 502 MV errors in P f
[h264 @ 0000000002ed08c0] Increasing reorder buffer to 8
frame=  964 fps= 30 q=29.0 size=N/A time=00:00:33.26 bitrate=N/A dup=141
frame=  999 fps= 31 q=29.0 size=N/A time=00:00:33.77 bitrate=N/A dup=170
[rtsp @ 0000000000122bc0] max delay reached. need to consume packet
[rtsp @ 0000000000122bc0] RTP: missed 12 packets
[h264 @ 0000000002ed1000] corrupted macroblock 55 32 (total_coeff=-1)
[h264 @ 0000000002ed1000] error while decoding MB 55 32

　　

解决方法：

采用以下命令进行拉流转发，运行了几个小时，几乎没有出现丢包现象

ffmpeg -rtsp_transport tcp -i rtsp://192.168.1.168/0 -vcodec copy -f rtsp rtsp://192.168.1.28/11

原因：这是rtsp协议默认使用udp导致的问题，所以rtsp强制使用tcp方式可以一定程度避免丢包。

如果是拉rtsp转rtmp，命令是（没测试）

ffmpeg -rtsp_transport tcp -i rtsp://admin:password@192.168.1.11:554 -vcodec copy -f flv -an rtmp://localhost/live/tests

参考：https://github.com/eguid/FFCH4J/issues/11