[Libav-user] Speeding up H264 decoding

[Nikita Orlov]

I see. Do you have exactly model name of cpu?

08.09.2016, 13:40, "Simon Brown" <simon.k.brown at gmail.com>:
> 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 <puneet.cse.iitd at gmail.com> 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 <nikitos1550 at yandex.ru> wrote:
>>> Hi!
>>>
>>> Which cpu do you use? Most probably there is hardware decoder. Current cpu usually can decode 4K at 30
>>> some FullHD at 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" <simon.k.brown at gmail.com>:
>>>> Thank you - I tried that, but got no noticeable difference.
>>>>
>>>> On 7 September 2016 at 16:59, Kristijonas Malisauskas <km at sportcaster.dk> 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 <simon.k.brown at gmail.com> 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
>>>>>> Libav-user at ffmpeg.org
>>>>>> http://ffmpeg.org/mailman/listinfo/libav-user
>>>>>
>>>>> _______________________________________________
>>>>> Libav-user mailing list
>>>>> Libav-user at ffmpeg.org
>>>>> http://ffmpeg.org/mailman/listinfo/libav-user
>>>> ,
>>>>
>>>> _______________________________________________
>>>> Libav-user mailing list
>>>> Libav-user at ffmpeg.org
>>>> http://ffmpeg.org/mailman/listinfo/libav-user
>>>
>>> --
>>> Nikita Orlov
>>> Skype: nik_stet
>>> QQ: 2717846083
>>>
>>> _______________________________________________
>>> Libav-user mailing list
>>> Libav-user at ffmpeg.org
>>> http://ffmpeg.org/mailman/listinfo/libav-user
>>
>> _______________________________________________
>> Libav-user mailing list
>> Libav-user at ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/libav-user
>
> ,
>
> _______________________________________________
> Libav-user mailing list
> Libav-user at ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/libav-user

-- 
Nikita Orlov
Skype: nik_stet
QQ: 2717846083