@Nikita: No, it's built into an FPGA. @Puneet: That's working much better now.
I've also managed to include the Neon libraries correctly and have noticed a decent speed improvement, so am much happier. Now, of course, I need to make it twice as fast again, but that's going to need a different CPU, I think. Cheers, Simon On 8 September 2016 at 11:44, Nikita Orlov <[email protected]> wrote: > I see. Do you have exactly model name of cpu? > > 08.09.2016, 13:40, "Simon Brown" <[email protected]>: > > That's excellent - thank you. I had changed number of threads, but only > after the codec was opened. > > > > The CPU is a dual core Cortex-A9 running at 950MHz. There is no > hardware coprocessor, so was hoping to eek out what I could from this. > > > > I know FFMpeg has some Neon options (and the libraries have been built > with HAVE_NEON=1, but does anyone know how much of the H.264 decoder has > Neon code, if any? > > > > Cheers, > > Simon > > > > On 8 September 2016 at 11:11, Puneet Kapoor <[email protected]> > wrote: > >> I had a similar question sometime back. > >> Try following this thread: https://ffmpeg.org/ > pipermail/libav-user/2016-July/009365.html see if it helps you. > >> > >> Cheers > >> > >> On Thu, Sep 8, 2016 at 11:36 AM, Nikita Orlov <[email protected]> > wrote: > >>> Hi! > >>> > >>> Which cpu do you use? Most probably there is hardware decoder. Current > cpu usually can decode 4K@30 > >>> some FullHD@30 at least. > >>> > >>> Another thing, that maybe can suit your case, is to prepare video > optimized for decode. > >>> Very simple optimization is to use simplest profile - baseline. I > believe that there are some other options > >>> to increase decoding speed, you have to google them. > >>> > >>> 08.09.2016, 00:41, "Simon Brown" <[email protected]>: > >>>> Thank you - I tried that, but got no noticeable difference. > >>>> > >>>> On 7 September 2016 at 16:59, Kristijonas Malisauskas < > [email protected]> wrote: > >>>>> First thing i would suggest doing is setting your AVCodecContext to > use more threads > >>>>> > >>>>> for ex: videoCtx->thread_count = 4; > >>>>> > >>>>> On Wed, Sep 7, 2016 at 3:05 PM, Simon Brown <[email protected]> > wrote: > >>>>>> I'm running a decode operation using doc/examples/demuxing_decoding.c > I'm running on an Arm A9 with Neon enabled. Sending a 1280x720p stream at > 24fps it can only decode about 15fps. Is there any way of speeding up the > decode operation? > >>>>>> > >>>>>> Regards, > >>>>>> Simon > >>>>>> _______________________________________________ > >>>>>> Libav-user mailing list > >>>>>> [email protected] > >>>>>> http://ffmpeg.org/mailman/listinfo/libav-user > >>>>> > >>>>> _______________________________________________ > >>>>> Libav-user mailing list > >>>>> [email protected] > >>>>> http://ffmpeg.org/mailman/listinfo/libav-user > >>>> , > >>>> > >>>> _______________________________________________ > >>>> Libav-user mailing list > >>>> [email protected] > >>>> http://ffmpeg.org/mailman/listinfo/libav-user > >>> > >>> -- > >>> Nikita Orlov > >>> Skype: nik_stet > >>> QQ: 2717846083 > >>> > >>> _______________________________________________ > >>> Libav-user mailing list > >>> [email protected] > >>> http://ffmpeg.org/mailman/listinfo/libav-user > >> > >> _______________________________________________ > >> Libav-user mailing list > >> [email protected] > >> http://ffmpeg.org/mailman/listinfo/libav-user > > > > , > > > > _______________________________________________ > > Libav-user mailing list > > [email protected] > > http://ffmpeg.org/mailman/listinfo/libav-user > > -- > Nikita Orlov > Skype: nik_stet > QQ: 2717846083 > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user >
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