mirror of
https://github.com/c0decracker/video-splitter.git
synced 2026-01-23 10:25:54 +00:00
979e0b9ed1
Add the --split-{chunks,filesize} options to split
to a number of chunks / split with chunks of capped
size.
For --split-filesize, also adding two auxiliary
options:
--chunk-strategy={eager,even}
--filesize-factor=<float>
220 lines
8.7 KiB
Python
220 lines
8.7 KiB
Python
#!/usr/bin/env python
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import csv
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import subprocess
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import math
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import json
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import os
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import shlex
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from optparse import OptionParser
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def split_by_manifest(filename, manifest, vcodec="copy", acodec="copy",
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extra="", **kwargs):
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""" Split video into segments based on the given manifest file.
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Arguments:
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filename (str) - Location of the video.
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manifest (str) - Location of the manifest file.
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vcodec (str) - Controls the video codec for the ffmpeg video
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output.
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acodec (str) - Controls the audio codec for the ffmpeg video
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output.
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extra (str) - Extra options for ffmpeg.
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"""
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if not os.path.exists(manifest):
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print "File does not exist: %s" % manifest
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raise SystemExit
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with open(manifest) as manifest_file:
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manifest_type = manifest.split(".")[-1]
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if manifest_type == "json":
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config = json.load(manifest_file)
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elif manifest_type == "csv":
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config = csv.DictReader(manifest_file)
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else:
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print "Format not supported. File must be a csv or json file"
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raise SystemExit
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split_cmd = ["ffmpeg", "-i", filename, "-vcodec", vcodec,
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"-acodec", acodec, "-y"] + shlex.split(extra)
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try:
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fileext = filename.split(".")[-1]
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except IndexError as e:
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raise IndexError("No . in filename. Error: " + str(e))
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for video_config in config:
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split_str = ""
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split_args = []
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try:
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split_start = video_config["start_time"]
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split_length = video_config.get("end_time", None)
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if not split_length:
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split_length = video_config["length"]
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filebase = video_config["rename_to"]
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if fileext in filebase:
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filebase = ".".join(filebase.split(".")[:-1])
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split_args += ["-ss", str(split_start), "-t",
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str(split_length), filebase + "." + fileext]
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print "########################################################"
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print "About to run: "+" ".join(split_cmd+split_args)
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print "########################################################"
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subprocess.check_output(split_cmd+split_args)
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except KeyError as e:
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print "############# Incorrect format ##############"
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if manifest_type == "json":
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print "The format of each json array should be:"
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print "{start_time: <int>, length: <int>, rename_to: <string>}"
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elif manifest_type == "csv":
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print "start_time,length,rename_to should be the first line "
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print "in the csv file."
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print "#############################################"
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print e
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raise SystemExit
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def get_video_length(filename):
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output = subprocess.check_output(("ffprobe", "-v", "error", "-show_entries", "format=duration", "-of", "default=noprint_wrappers=1:nokey=1", filename)).strip()
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video_length = int(float(output))
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print "Video length in seconds: "+str(video_length)
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return video_length
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def ceildiv(a, b):
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return int(math.ceil(a / float(b)))
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def split_by_seconds(filename, split_length, vcodec="copy", acodec="copy",
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extra="", video_length=None, **kwargs):
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if split_length and split_length <= 0:
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print "Split length can't be 0"
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raise SystemExit
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if not video_length:
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video_length = get_video_length(filename)
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split_count = ceildiv(video_length, split_length)
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if(split_count == 1):
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print "Video length is less then the target split length."
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raise SystemExit
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split_cmd = ["ffmpeg", "-i", filename, "-vcodec", vcodec, "-acodec", acodec] + shlex.split(extra)
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try:
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filebase = ".".join(filename.split(".")[:-1])
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fileext = filename.split(".")[-1]
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except IndexError as e:
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raise IndexError("No . in filename. Error: " + str(e))
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for n in range(0, split_count):
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split_args = []
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if n == 0:
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split_start = 0
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else:
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split_start = split_length * n
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split_args += ["-ss", str(split_start), "-t", str(split_length),
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filebase + "-" + str(n+1) + "-of-" + \
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str(split_count) + "." + fileext]
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print "About to run: "+" ".join(split_cmd+split_args)
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subprocess.check_output(split_cmd+split_args)
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def main():
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parser = OptionParser()
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parser.add_option("-f", "--file",
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dest = "filename",
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help = "File to split, for example sample.avi",
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type = "string",
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action = "store"
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)
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parser.add_option("-s", "--split-size",
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dest = "split_length",
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help = "Split or chunk size in seconds, for example 10",
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type = "int",
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action = "store"
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)
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parser.add_option("-c", "--split-chunks",
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dest = "split_chunks",
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help = "Number of chunks to split to",
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type = "int",
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action = "store"
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)
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parser.add_option("-S", "--split-filesize",
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dest = "split_filesize",
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help = "Split or chunk size in bytes (approximate)",
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type = "int",
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action = "store"
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)
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parser.add_option("--filesize-factor",
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dest = "filesize_factor",
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help = "with --split-filesize, use this factor in time to" \
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" size heuristics [default: %default]",
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type = "float",
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action = "store",
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default = 0.95
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)
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parser.add_option("--chunk-strategy",
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dest = "chunk_strategy",
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help = "with --split-filesize, allocate chunks according to" \
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" given strategy (eager or even)",
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type = "choice",
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action = "store",
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choices = ['eager', 'even'],
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default = 'eager'
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)
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parser.add_option("-m", "--manifest",
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dest = "manifest",
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help = "Split video based on a json manifest file. ",
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type = "string",
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action = "store"
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)
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parser.add_option("-v", "--vcodec",
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dest = "vcodec",
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help = "Video codec to use. ",
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type = "string",
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default = "copy",
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action = "store"
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)
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parser.add_option("-a", "--acodec",
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dest = "acodec",
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help = "Audio codec to use. ",
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type = "string",
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default = "copy",
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action = "store"
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)
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parser.add_option("-e", "--extra",
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dest = "extra",
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help = "Extra options for ffmpeg, e.g. '-e -threads 8'. ",
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type = "string",
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default = "",
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action = "store"
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)
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(options, args) = parser.parse_args()
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def bailout():
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parser.print_help()
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raise SystemExit
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if not options.filename:
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bailout()
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if options.manifest:
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split_by_manifest(**(options.__dict__))
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else:
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video_length = None
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if not options.split_length:
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video_length = get_video_length(options.filename)
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file_size = os.stat(options.filename).st_size
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split_filesize = None
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if options.split_filesize:
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split_filesize = int(options.split_filesize * options.filesize_factor)
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if split_filesize and options.chunk_strategy == 'even':
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options.split_chunks = ceildiv(file_size, split_filesize)
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if options.split_chunks:
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options.split_length = ceildiv(video_length, options.split_chunks)
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if not options.split_length and split_filesize:
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options.split_length = int(split_filesize / float(file_size) * video_length)
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if not options.split_length:
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bailout()
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split_by_seconds(video_length=video_length, **(options.__dict__))
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if __name__ == '__main__':
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main()
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