ffmpeg buffer queue drop overflow, dropping -


i got 

buffer queue drop overflow, dropping

error when try run code 

ffmpeg.exe -i input.mkv -i logo.png -loop 1 -report -filter_complex "overlay=20:15,subtitles ='sub.srt'" -c:a copy -q:v 1 -f segment -segment_time 600 "out_%d.ts"

but if removed overlay in complex filter works find produce video without logo

the following command working without logo 

ffmpeg.exe -i input.mkv -i logo.png -loop 1 -report -filter_complex "subtitles ='sub.srt'" -c:a copy -q:v 1 -f segment -segment_time 600 "out_%d.ts"


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