If this is the average bitrate of the file, it is certainly possible that it has variances in it, which double the bitrate requirements in certain parts.
See First person to stream gets all the banwidth - #7 by OttoKerner for details.
If this is the average bitrate of the file, it is certainly possible that it has variances in it, which double the bitrate requirements in certain parts.
See First person to stream gets all the banwidth - #7 by OttoKerner for details.