f8c8404a44
modified: Makefiles/Makefiles.vidGal.d/Makefile.webmCompress modified: Makefiles/Makefiles.vidGal.d/Makefile.webmCompress.cfg new file: galleryHelper/getFfmpegFlags.py
92 lines
2.6 KiB
Python
92 lines
2.6 KiB
Python
#!/usr/bin/env python3
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#
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# Command line use of 'ffprobe':
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#
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# ffprobe -loglevel quiet -print_format json \
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# -show_format -show_streams \
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# video-file-name.mp4
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#
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# man ffprobe # for more information about ffprobe
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#
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import subprocess as sp
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import json
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import sys
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import argparse
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def probe(vid_file_path):
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''' Give a json from ffprobe command line
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@vid_file_path : The absolute (full) path of the video file, string.
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'''
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if type(vid_file_path) != str:
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raise Exception('Give ffprobe a full file path of the video')
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return
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command = ["ffprobe",
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"-loglevel", "quiet",
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"-print_format", "json",
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"-show_format",
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"-show_streams",
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vid_file_path
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]
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pipe = sp.Popen(command, stdout=sp.PIPE, stderr=sp.STDOUT)
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out, err = pipe.communicate()
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return json.loads(out.decode('utf-8'))
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def duration(vid_file_path):
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''' Video's duration in seconds, return a float number
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'''
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_json = probe(vid_file_path)
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if 'format' in _json:
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if 'duration' in _json['format']:
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return float(_json['format']['duration'])
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if 'streams' in _json:
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# commonly stream 0 is the video
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for s in _json['streams']:
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if 'duration' in s:
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return float(s['duration'])
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# if everything didn't happen,
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# we got here because no single 'return' in the above happen.
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raise Exception('I found no duration')
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#return None
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def getPixelSize(bitrate):
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if(bitrate >= 500):
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return 480
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if(bitrate >= 250):
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return 360
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return 240
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if __name__ == "__main__":
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argParser = argparse.ArgumentParser(description='Calculate Bitrate and Pixelsize (height) for a encoding a video with limited (byte-)size')
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argParser.add_argument('inFile', help="file to be analysed")
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argParser.add_argument('flagToGet', help="Zielparameter wählen", choices=['pixelSize', 'videoBitrate'])
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argParser.add_argument('--audioBitrate', help="audio bitrate die abgezogen werden soll (in kbit/s)", default=0)
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argParser.add_argument('--targetSize', help="dateigröße der zieldatei in MB", default=10)
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argParser.add_argument('--overhead', help="prozentualer overhead in %", default=95)
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argParser.add_argument('--maxVidBitrate', help="Videobitrate, bei der gedeckelt werden soll", default=750)
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argv = argParser.parse_args()
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video_file_path = argv.inFile
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durationInSec = duration(video_file_path)
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videoBitrateInKbPerSec = argv.overhead/100 * (argv.targetSize * 1000 * 8)/durationInSec - argv.audioBitrate
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videoBitrateInKbPerSec = int(min(argv.maxVidBitrate, videoBitrateInKbPerSec))
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pixelSize = getPixelSize(videoBitrateInKbPerSec)
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if(argv.flagToGet == "pixelSize"):
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print(pixelSize)
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if(argv.flagToGet == "videoBitrate"):
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print(videoBitrateInKbPerSec)
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