绘制视频的编码比特率与播放位置的关系图 [英] draw graph of encoded bit rate of video vs play location

问题描述

我正在尝试测量通过网络播放视频时所需带宽的变化。为此，我需要绘制视频期间随时播放视频所需的带宽图表。

I am trying to measure the variation in the bandwidth required when a video is played over the network. For this purpose, i need to make a graph of the bandwidth required to play the video continuously at any time during the video.

我尝试使用gstreamer处理视频，但是它给了我已解码[未编码]视频的比特率，该比特率或多或少是恒定的。

I tried processing the video with gstreamer but it gives me the bit rate of the decoded[not encoded] video which is more or less constant.

有没有一种方法可以获取一段时间内视频的编码比特率？

Is there a way to get the encoded bit rate of a video over time?

推荐答案

由于我在这里没有答案，因此我将发布自己找到的解决方案，以便对他人有所帮助。

Since i got no answers here, i will post the solution that i found for myself so that it may help others.

Vlc python绑定向vlc媒体播放器公开python api。它们还提供MediaStats类，该类可用于确定视频统计信息。

Vlc python bindings expose a python api to the vlc media player. They also provide a MediaStats class that can be used to determine video statistics.

class MediaStats(_Cstruct):
_fields_ = [
    ('read_bytes',          ctypes.c_int  ),
    ('input_bitrate',       ctypes.c_float),
    ('demux_read_bytes',    ctypes.c_int  ),
    ('demux_bitrate',       ctypes.c_float),
    ('demux_corrupted',     ctypes.c_int  ),
    ('demux_discontinuity', ctypes.c_int  ),
    ('decoded_video',       ctypes.c_int  ),
    ('decoded_audio',       ctypes.c_int  ),
    ('displayed_pictures',  ctypes.c_int  ),
    ('lost_pictures',       ctypes.c_int  ),
    ('played_abuffers',     ctypes.c_int  ),
    ('lost_abuffers',       ctypes.c_int  ),
    ('sent_packets',        ctypes.c_int  ),
    ('sent_bytes',          ctypes.c_int  ),
    ('send_bitrate',        ctypes.c_float),
]

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