在下面的示例中我们尝试过，但是没有运气
在更改（按Tab或单击鼠标）时，此代码可以正常工作。按下Enter键，它将执行两次。
请帮助我解决此问题。
ffmpeg -i tos.mp4 -threads 4 -preset fast -c:v libx264 -profile:v main -level 4.0 -s:v 640x360 -b:v 512k -pix_fmt yuv420p -refs 3 -bf 3 -g 75 -keyint_min 25 -b_strategy 1 -flags +cgop -sc_threshold 0 -movflags negative_cts_offsets+faststart -an -y temp-v1.mp4
ffmpeg -i tos.mp4 -threads 4 -preset fast -c:v libx264 -profile:v main -level 4.0 -s:v 1280x720 -b:v 1500k -pix_fmt yuv420p -refs 3 -bf 3 -g 75 -keyint_min 25 -b_strategy 1 -flags +cgop -sc_threshold 0 -movflags negative_cts_offsets+faststart -an -y temp-v2.mp4
ffmpeg -i tos.mp4 -threads 4 -preset fast -c:v libx264 -profile:v main -level 4.0 -s:v 1920x1080 -b:v 2100k -pix_fmt yuv420p -refs 3 -bf 3 -g 75 -keyint_min 25 -b_strategy 1 -flags +cgop -sc_threshold 0 -movflags negative_cts_offsets+faststart -an -y temp-v3.mp4
ffmpeg -i tos.mp4 -threads 4 -c:a aac -strict experimental -b:a 128k -maxrate:a 128k -bufsize:a 128k -af aresample=44100 -ar 44100 -ac 2 -vn -y temp-a1.mp4
MP4Box -dash 264600 -frag 264600 -dash-scale 44100 -bound -mem-frags -rap -profile dashavc264:live -min-buffer 12000 -bs-switching no -sample-groups-traf -single-traf -subsegs-per-sidx -1 -segment-name $RepresentationID$/$Number$$Init=i$ -out manifest.mpd temp-v1.mp4#trackID=1:id=v1:period=p0 temp-v2.mp4#trackID=1:id=v2:period=p0 temp-v3.mp4#trackID=1:id=v3:period=p0 temp-a1.mp4#trackID=1:id=a1:period=p0