I use the following python code to split a FLV video file into a set of parts
,when finished ,only the first part video can be played ,the other parts are
corrupted.I wonder why and Is there some correct ways to split video files
import sys, os
kilobytes = 1024
megabytes = kilobytes * 1000
chunksize = int(1.4 * megabytes) # default: roughly a floppy
print(chunksize , type(chunksize ))
def split(fromfile, todir, chunksize=chunksize):
if not os.path.exists(todir): # caller handles errors
os.mkdir(todir) # make dir, read/write parts
else:
for fname in os.listdir(todir): # delete any existing files
os.remove(os.path.join(todir, fname))
partnum = 0
input = open(fromfile, 'rb') # use binary mode on Windows
while True: # eof=empty string from read
chunk = input.read(chunksize) # get next part <= chunksize
if not chunk: break
partnum += 1
filename = os.path.join(todir, ('part{}.flv'.format(partnum)))
fileobj = open(filename, 'wb')
fileobj.write(chunk)
fileobj.close() # or simply open().write()
input.close()
assert partnum <= 9999 # join sort fails if 5 digits
return partnum
if __name__ == '__main__':
fromfile = input('File to be split： ') # input if clicked
todir = input('Directory to store part files：')
print('Splitting', fromfile, 'to', todir, 'by', chunksize)
parts = split(fromfile, todir, chunksize)
print('Split finished:', parts, 'parts are in', todir)
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