ffmpeg_bitrate_stats 0.1

要求

• Python3.6
• FFmpeg:
  • 从their website
  下载静态生成
  • 将ffprobe可执行文件放入$PATH
• pip3 install -r requirements.txt

安装

pip install ffmpeg_bitrate_stats

或者克隆此存储库，然后使用 python -m ffmpeg_bitrate_stats

用法

脚本输出一组比特率统计信息，包括聚合 用于预定义窗口。这些窗口可以是基于时间的，也可以是 基于GOP（用于视频流）。选择基于时间的窗口时， 可以以秒为单位指定块的大小。

输出为STDOUT，因此可以将其重定向到一个或另一个文件 脚本

见ffmpeg_bitrate_stats -h：

usage: ffmpeg_bitrate_stats [-h] [-n] [-v] [-s {video,audio}]
                               [-a {time,gop}] [-c CHUNK_SIZE]
                               [-of {json,csv}]
                               input

positional arguments:
  input                 input file

optional arguments:
  -h, --help            show this help message and exit
  -n, --dry-run         Do not run command, just show what would be done
                        (default: False)
  -v, --verbose         Show verbose output (default: False)
  -s {video,audio}, --stream-type {video,audio}
                        Stream type to analyze (default: video)
  -a {time,gop}, --aggregation {time,gop}
                        Window for aggregating statistics, either time-based
                        (per-second) or per GOP (default: time)
  -c CHUNK_SIZE, --chunk-size CHUNK_SIZE
                        Custom aggregation window size in seconds (default:
                        1.0)
  -of {json,csv}, --output-format {json,csv}
                        output in which format (default: json)

输出

输出可以是json，它包括每个块的各个字段， 或者csv，它为每个块重复每一行。CSV遵循 “整洁”的数据概念，所以有点多余

速率以千位每秒为单位，使用SI前缀（即，千= 1000）。

字段说明：

• input_file：输入文件的路径
• stream_type：使用的流类型（视频、音频）
• avg_fps：平均fps（帧数除以持续时间）
• num_frames：帧数
• avg_bitrate：平均比特率
• avg_bitrate_over_chunks：在 大块
• ^ TT12}$：在块
上计算的最大比特率
• min_bitrate：在块上计算的最小比特率
• max_bitrate_factor：峰值和平均值之间的关系
• bitrate_per_chunk：每个块的个别比特率
• aggregation：使用的聚合类型
• chunk_size：块的大小（聚合为“时间”时）
• duration：流的总持续时间（最后一帧DTS减去 第一个DTS）

json示例：

➜ ffmpeg_bitrate_stats -a time -c 30 -of json BigBuckBunny.mp4
{
    "input_file": "BigBuckBunny.mp4",
    "stream_type": "video",
    "avg_fps": 60.002,
    "num_frames": 38072,
    "avg_bitrate": 8002.859,
    "avg_bitrate_over_chunks": 7849.263,
    "max_bitrate": 14565.117,
    "min_bitrate": 3876.533,
    "max_bitrate_factor": 1.82,
    "bitrate_per_chunk": [
        8960.89,
        8036.678,
        6099.959,
        4247.879,
        7276.979,
        5738.383,
        7740.339,
        7881.705,
        7572.594,
        8387.719,
        9634.343,
        9939.488,
        9365.104,
        5061.071,
        14565.117,
        9725.483,
        4573.873,
        7765.041,
        9796.135,
        12524.024,
        3876.533,
        3914.455
    ],
    "aggregation": "time",
    "chunk_size": 30.0,
    "duration": 634.517
}

CSV示例：

➜  ffmpeg_bitrate_stats -a time -c 30 -of csv BigBuckBunny.mp4
input_file,chunk_index,stream_type,avg_fps,num_frames,avg_bitrate,avg_bitrate_over_chunks,max_bitrate,min_bitrate,max_bitrate_factor,bitrate_per_chunk,aggregation,chunk_size,duration
BigBuckBunny.mp4,0,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,8960.89,time,30.0,634.517
BigBuckBunny.mp4,1,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,8036.678,time,30.0,634.517
BigBuckBunny.mp4,2,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,6099.959,time,30.0,634.517
BigBuckBunny.mp4,3,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,4247.879,time,30.0,634.517
BigBuckBunny.mp4,4,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,7276.979,time,30.0,634.517
BigBuckBunny.mp4,5,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,5738.383,time,30.0,634.517
BigBuckBunny.mp4,6,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,7740.339,time,30.0,634.517
BigBuckBunny.mp4,7,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,7881.705,time,30.0,634.517
BigBuckBunny.mp4,8,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,7572.594,time,30.0,634.517
BigBuckBunny.mp4,9,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,8387.719,time,30.0,634.517
BigBuckBunny.mp4,10,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,9634.343,time,30.0,634.517
BigBuckBunny.mp4,11,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,9939.488,time,30.0,634.517
BigBuckBunny.mp4,12,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,9365.104,time,30.0,634.517
BigBuckBunny.mp4,13,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,5061.071,time,30.0,634.517
BigBuckBunny.mp4,14,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,14565.117,time,30.0,634.517
BigBuckBunny.mp4,15,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,9725.483,time,30.0,634.517
BigBuckBunny.mp4,16,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,4573.873,time,30.0,634.517
BigBuckBunny.mp4,17,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,7765.041,time,30.0,634.517
BigBuckBunny.mp4,18,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,9796.135,time,30.0,634.517
BigBuckBunny.mp4,19,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,12524.024,time,30.0,634.517
BigBuckBunny.mp4,20,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,3876.533,time,30.0,634.517
BigBuckBunny.mp4,21,video,60.002,38072,8002.859,7849.263,14565.117,3876.533,1.82,3914.455,time,30.0,634.517

许可证

ffmpeg_比特率统计，版权所有（c）2019 Werner Robitz

特此免费向任何获得 本软件和相关文档文件的副本 “软件”），无限制地处理软件，包括 但不限于使用、复制、修改、合并、发布， 分发、再授权和/或出售软件副本，以及 允许向其提供软件的人员这样做，但须遵守 以下条件：

上述版权公告及本许可公告须包括在内 在软件的所有副本或大部分中

软件按“原样”提供，不作任何形式的保证 或默示的，包括但不限于 适销性、适合特定目的和不侵权。 在任何情况下，作者或版权持有人均不对任何 索赔、损害赔偿或其他责任，无论是在合同诉讼中， 侵权行为或其他，由 软件或软件中的使用或其他交易