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You need to set buff_size = max_buffer_size in ffmpeg, and * 1.5, min_buffer_size and = max_buffer_size should be in 5% range with * 0.92, avg_buffer_size = max_buffer_size * 0.96, gop=60, fps=30 in ffmpeg to avoid MUST fix issues with Apple meadiastreamvalidator. |
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You will need to set minrate:maxrate = avgrate-5%:avgrate+5% and maxrate=bufsize :buffsize = 0.92:0.96:1:1.5 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" \ . . . -g 60 -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 9.5M6M \ -maxrate:v:0 10M \ -minrate:v:0 9M9.2M \ -bufsize:v:0 10M15M \ -b:a:0 192k \ -muxdelay 0 \ -muxpreload 0 \ . . . |