我试图弄清楚为什么以下 ffmpeg (4.2.1) 命令在大多数情况下运行良好，但有时最终会卡在同一帧上。
这个 ffmpeg 命令允许我在录制 VOD 的同时制作一个 LIVE 流。
有没有人遇到过这个问题？
预先感谢您的帮助。
17:27:07 | ffmpeg.exe -hide_banner -y -rtbufsize 500M -f dshow -s 1280x720 -i video="Microsoft® LifeCam Studio(TM)":audio="Microphone (Realtek(R) Audio)" -flags +global_header -c:v h264 -pix_fmt yuv420p -profile:v baseline -level 3.0 -preset ultrafast -pix_fmt yuv420p -b:v 1935k -r 30.0 -c:a aac -b:a 128k -ac 1 -f tee -map 0:v -map 0:a "'C:\Users\xxx\2020-06-10_17-27-07.mp4'|[f=fifo:fifo_format=flv:drop_pkts_on_overflow=1:attempt_recovery=1:recovery_wait_time=1]rtmp://xx.xx.xx.xxx:1935/live/xxxx"
17:27:09 | [frame= 39 fps=0.0 q=15.0 size=N/A time=00:00:00.95 bitrate=N/A dup=23 drop=0 speed= 1.9x ]
17:27:10 | [frame= 54 fps= 54 q=22.0 size=N/A time=00:00:01.44 bitrate=N/A dup=23 drop=0 speed=1.43x ]
...
17:30:09 | [frame= 5418 fps= 30 q=22.0 size=N/A time=00:03:00.44 bitrate=N/A dup=24 drop=0 speed= 1x ]
17:30:10 | [frame= 5430 fps= 30 q=20.0 size=N/A time=00:03:00.95 bitrate=N/A dup=26 drop=0 speed= 1x ]
17:30:10 | [frame= 5447 fps= 30 q=23.0 size=N/A time=00:03:01.44 bitrate=N/A dup=28 drop=4 speed= 1x ]
17:30:11 | [frame= 5463 fps= 30 q=23.0 size=N/A time=00:03:01.95 bitrate=N/A dup=28 drop=4 speed= 1x ]
...
17:48:55 | [frame=39141 fps= 30 q=21.0 size=N/A time=00:21:44.46 bitrate=N/A dup=40 drop=15 speed= 1x ]
17:48:55 | [frame=39176 fps= 30 q=12.0 size=N/A time=00:21:45.43 bitrate=N/A dup=60 drop=15 speed= 1x ]
17:48:55 | [frame=39199 fps= 30 q=12.0 size=N/A time=00:21:46.20 bitrate=N/A dup=82 drop=15 speed= 1x ]
17:48:56 | [frame=39205 fps= 30 q=18.0 size=N/A time=00:21:46.40 bitrate=N/A dup=82 drop=38 speed= 1x ]
17:48:56 | [frame=39205 fps= 30 q=18.0 size=N/A time=00:21:47.22 bitrate=N/A dup=82 drop=38 speed= 1x ]
17:48:57 | [frame=39205 fps= 30 q=18.0 size=N/A time=00:21:47.73 bitrate=N/A dup=82 drop=38 speed= 1x ]
...
18:01:05 | [frame=39205 fps= 19 q=18.0 size=N/A time=00:33:56.24 bitrate=N/A dup=82 drop=38 speed= 1x ]