concat list input for ffmpeg from dash m4s chunks

ffmpeg-concat-list.py

#!/usr/bin/env python

import sys 
import os

def ffmpegconcatlist(ts_list, isPlain):
    tslist = []
    for f in ts_list:
        f = f.strip()
        if not f or not os.stat(f).st_size:
            continue
        ts = os.path.basename(f)
        seq = int(ts.replace(".m4s", "").replace("./",""))
        tslist.append((seq,f))

    tslist = sorted(tslist, key=lambda o: o[0])

    result = []
    for o,f in tslist:
        if (isPlain):
            result.append(("{0}".format(f)) )
        else:
            result.append(("file '{0}'".format(f)) )
    return result

def test():
    data = """ 
    /a/b/c/d/9.ts
    aa/a/a/a/5.ts
    a/a/a/a/a/a/1.ts
    a/a/a/a/a/a/a/2.ts
    """
    print("\n".join(ffmpegconcatlist(data.splitlines())), False)

    data = """ 
    9.ts
    5.ts
    1.ts
    2.ts
    10.ts
    1000.ts
    1010.ts
    2010.ts
    3010.ts
    3013.ts
    """
    print("\n".join(ffmpegconcatlist(data.splitlines())), True)

if __name__ == "__main__":
    #test()
    result = []
    if len(sys.argv) > 1:
        if (sys.argv[1] == "-plain"):
            result = ffmpegconcatlist(sys.stdin.readlines(), True)
        else:
            print "error. incorrect params"
            sys.exit(1)
    else:
        result = ffmpegconcatlist(sys.stdin.readlines(), False)

    if (len(result) > 0): 
        print("\n".join(result))