On Mon, 31 Oct 2005 09:41:02 +0100, =?ISO-8859-1?Q?Lasse_V=E5gs=E6ther_Karlsen?= <[EMAIL PROTECTED]> wrote:
>David Rasmussen wrote: ><snip> >> If you must know, the above one-liner actually counts the number of >> frames in an MPEG2 file. I want to know this number for a number of >> files for various reasons. I don't want it to take forever. ><snip> > >Don't you risk getting more "frames" than the file actually have? What >if the encoded data happens to have the magic byte values for something >else? > Good point, but perhaps the bit pattern the OP is looking for is guaranteed (e.g. by some kind of HDLC-like bit or byte stuffing or escaping) not to occur except as frame marker (which might make sense re the problem of re-synching to frames in a glitched video stream). The OP probably knows. I imagine this thread would have gone differently if the title had been "How to count frames in an MPEG2 file?" and the OP had supplied the info about what marks a frame and whether it is guaranteed not to occur in the data ;-) Regards, Bengt Richter -- http://mail.python.org/mailman/listinfo/python-list
