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You need to set buff_size = max_buffer_size in ffmpeg, and = min_buffer_size and max= avg_buffer_size should be in 5% range with avg_buffer_size in ffmpeg to avoid MUST fix issues with Apple meadiastreamvalidator. |
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You will need to set minrate:avgrate:maxrate = avgrate-2.5%:avgrate+2.5% and avgrate=bufsize :buffsize = 1:1:1:1 with ffmpeg to avoid above case. The ffmpeg options you should do is something like below:
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ffmpeg -i "/tmp/ck_ffmpeg/2021-09-22_305fde4e/src.mp4" \ . . . -filter:v:0 "scale=iw*sar*min(1920/(iw*sar)\,1080/ih):ih*min(1920/(iw*sar)\,1080/ih), pad=1920:1080:(ow-iw)/2:(oh-ih)/2, format=yuv420p, fps=30" \ -b:v:0 9.75M9M \ -maxrate:v:0 10M9M \ -minrate:v:0 9.5M9M \ -bufsize:v:0 9.75M9M \ -b:a:0 192k \ -muxdelay 0 \ -muxpreload 0 \ . . . |