libmpeg2? I use ffmpeg2 with mplayer to decode my HDTV ts stream,but the effect seems not so good. The video and audio may lose synchronization after a period of time. And works well for SDTV program.
On Fri, Feb 29, 2008 at 3:33 AM, Keith Winstein <[EMAIL PROTECTED]> wrote: > Hi Krishna, > > There's no exact formula -- it's very hard to exactly quantify the > performance of a general-purpose computer. > > In general, the bigger the frame (in resolution), the more work it'll take > to decode. > > The bigger the frame (in number of bits used to code it), the longer it'll > take to decode as well, I think. > > I think more use of motion compensation probably also slows down decoding. > > My guess would be that, on a PC of recent vintage, libmpeg2 can decode any > Main Profile @ High Level bitstream in real time. > > So if your stream is > - 4:2:0 > - with fewer than 63 million luminance samples per second, > - fewer than 80 megabits/sec, > - <= 1920 samples, <= 1152 lines, <= 60 fps, > - needs a VBV buffer of less than 1.2 megabytes, > - and uses <= 4608 bits per macroblock with two exceptions per row, > > my guess is that libmpeg2 can decode it in real time on a recent PC. If > you're looking to predict computational needs more accurately based on the > encoding parameters, those should be the sorts of parameters you'd want to > track and profile against. > > Best, > Keith > > > > On Thu, 28 Feb 2008, Krishna Prasad wrote: > > > Hello Keith > > > > I have a small clarification regarding the relationship between the > Decoding > > Time and FrameSize. I would like to know what exactly is the relationship > > between both the parameters in a GOP and for a set of GOP'S in a MPEG2 > video > > stream ?. > > > > Regards > > Krishna Prasad > > > > ------------------------------------------------------------------------- > This SF.net email is sponsored by: Microsoft > Defy all challenges. Microsoft(R) Visual Studio 2008. > http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ > _______________________________________________ > Libmpeg2-devel mailing list > Libmpeg2-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/libmpeg2-devel > ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Libmpeg2-devel mailing list Libmpeg2-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libmpeg2-devel
