index_flv.py 文件源码

def retimestamp_and_index_file(inpath, outpath=None, retimestamp=None):

    # no retimestamping needed
    if retimestamp is None:

        return index_file(inpath, outpath)

    # retimestamp the input in place and index
    elif retimestamp == 'inplace':
        from flvlib.scripts.retimestamp_flv import retimestamp_file_inplace

        log.debug("Retimestamping file `%s' in place", inpath)

        # retimestamp the file inplace
        if not retimestamp_file_inplace(inpath):
            log.error("Failed to retimestamp `%s' in place", inpath)
            return False

        return index_file(inpath, outpath)

    # retimestamp the input into a temporary file
    elif retimestamp == 'atomic':
        from flvlib.scripts.retimestamp_flv import retimestamp_file_atomically

        log.debug("Retimestamping file `%s' atomically", inpath)

        try:
            fd, temppath = tempfile.mkstemp()
            os.close(fd)
            # preserve the permission bits
            shutil.copymode(inpath, temppath)
        except EnvironmentError, (errno, strerror):
            log.error("Failed to create temporary file: %s", strerror)
            return False

        if not retimestamp_file_atomically(inpath, temppath):
            log.error("Failed to retimestamp `%s' atomically", inpath)
            # remove the temporary files
            force_remove(temppath)
            return False

        # index the temporary file
        if not index_file(temppath, outpath):
            force_remove(temppath)
            return False

        if not outpath:
            # If we were not writing directly to the output file
            # we need to overwrite the original
            try:
                shutil.move(temppath, inpath)
            except EnvironmentError, (errno, strerror):
                log.error("Failed to overwrite the original file with the "
                          "retimestamped and indexed version: %s", strerror)
                return False
        else:
            # if we were writing directly to the output file we need to remove
            # the retimestamped temporary file
            force_remove(temppath)

        return True