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如何从 h.264 视频流中获取帧速率和比特率?我可以从 SPS NAL 单元获取宽度和高度,但不能获取帧速率。
vui_parametersSPS NAL 具有以下字段:timing_info_present_flag, num_units_in_tick, time_scale, fixed_frame_rate_flag- 它们一起定义流的帧速率(当/如果适用)。
vui_parameters
timing_info_present_flag
num_units_in_tick
time_scale
fixed_frame_rate_flag