Function ffmpeg_sys_next::av_bprint_strftime
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Append a formatted date and time to a print buffer.
param buf bprint buffer to use param fmt date and time format string, see strftime() param tm broken-down time structure to translate
@note due to poor design of the standard strftime function, it may produce poor results if the format string expands to a very long text and the bprint buffer is near the limit stated by the size_max option.