Hm, i can't find something like ffrkmpp* functions in my .h files of ffmpeg.
Could this be a bug of ffmpeg? (I added --enable-rkmpp flag when I was building ffmpeg) >Среда, 11 апреля 2018, 18:05 +04:00 от Henri Zikken <zik...@xs4all.nl>: > >Please note I don’t have any experience with the lib, it was something I found >with a fast google search. > >FFMpeg does support hardware encoding, see: >https://ffmpeg.org/pipermail/ffmpeg-devel/2017-June/212339.html > >So you could do it that way as well. As far as I can tell, it would indeed >entail compiling ffmpeg with the mentioned flag, and then use the alternate >functions for everything, as you see in that changeset. > >So, instead of avcodec_open2, you would use ffrkmpp_open_decoder and so forth. > >I have no experience with using this. But if you look at that patchset which >adds the rockchip support, it should be pretty obvious. > >Regards, > >Henri Zikken > >Van: Libav-user < libav-user-boun...@ffmpeg.org > Namens Anton Prikazchikov >Verzonden: woensdag 11 april 2018 15:59 >Aan: "This list is about using libavcodec, libavformat, libavutil,libavdevice >and libavfilter." < libav-user@ffmpeg.org > >Onderwerp: Re: [Libav-user] How to use rkmpp decoder? > >Thanks for answer! > >I will be testing the lib which you sent. > >But still, do you know what mean "--enable-rkmpp" flag? I thought that ffmpeg >supports hardware decoding too. >>Среда, 11 апреля 2018, 17:37 +04:00 от Henri Zikken < zik...@xs4all.nl >: >>The packet you get, is raw stream data. If you want to decode it, you have to >>send the packet tot he decoder, and then receive back pcm frames from it. >>However, you don’t want to do that, as you want to use the hardware to >>decode, not ffmpeg. So this is why it’s kind of useless to put ffmpeg in it, >>as you want to do everything ffmpeg does, in hardware. >> >>I’d consider using one of the multiple available rtp libs, like this one: >>http://research.edm.uhasselt.be/jori/page/CS/Jrtplib.html >> >>to receive the stream, and then the mpp software to do the decoding/encoding >>and so forth. FFMpeg would be bloated and overly complicated as ‘just an rtp >>receiver’. >> >>Regards, >> >>Henri Zikken >> >>Van: Libav-user < libav-user-boun...@ffmpeg.org > Namens Anton Prikazchikov >>Verzonden: woensdag 11 april 2018 13:05 >>Aan: "This list is about using libavcodec, libavformat, libavutil,libavdevice >>and libavfilter." < libav-user@ffmpeg.org > >>Onderwerp: Re: [Libav-user] How to use rkmpp decoder? >> >>I need an avpacket because i read rtcp stream using by ffmpeg and receive >>from the rtcp stream an avpacket. Mpp can't read rtcp stream as i know. >> >>Also I saw that ffmpeg have "--enable-rkmpp" flag a t the configuration >>stage. And if I'm not mistaken this flag have to enable decoding using by >>rkmpp, but I can't run it... What must this flag do? >> >>>Basically the packet->data is just the raw data. You can just pass this on >>>to your mpp packet as the buffer. Packet->size gives you the size. >>I tried to add the received packet->data to mpppacket, but it doesn't work. >>Also i want to clarify d oes the packet->data accurately contain unmodified >>H264 data?(I receive H264 data stream) >>>Вторник, 10 апреля 2018, 21:16 +04:00 от Henri Zikken < zik...@xs4all.nl >: >>>I don’t see why you would want an avpacket in the first place, then. As >>>ffmpeg won’t do the decoding, why bother with ffmpeg? >>> >>>Basically the packet->data is just the raw data. You can just pass this on >>>to your mpp packet as the buffer. Packet->size gives you the size. >>> >>>Regards, >>> >>>Henri Zikken >>> >>> >>>Van: Libav-user < libav-user-boun...@ffmpeg.org > Namens Anton Prikazchikov >>>Verzonden: dinsdag 10 april 2018 08:34 >>>Aan: "This list is about using libavcodec, libavformat, >>>libavutil,libavdevice and libavfilter." < libav-user@ffmpeg.org > >>>Onderwerp: Re: [Libav-user] How to use rkmpp decoder? >>> >>>My purpose is decoding a received from RTCP stream h264 AVPacket-s to >>>AVFrame-s using by hardware of rk3399 (Rockchip RK3399 is a processor for >>>computing(aarch64, Rockchip platform)) >>> >>>I found that rk3399 has mpp. Media Process Platform(mpp) is the video codec >>>parser and Hardware Abstraction Layer library for the Rockchip platforms. >>>Mpp provides C API for decoding h264 video files using by hardware of >>>Rockchip platform. >>> >>>And now i am thinking that the problem is converting from AVPacket(contain >>>H264 data from RTCP stream) to MppPacket(this packet i will send to hardware >>>decoder) >>> >>>Thanks, >>>Anton Prikazchikov >>>>Понедельник, 9 апреля 2018, 20:06 +04:00 от Henri Zikken < zik...@xs4all.nl >>>>>: >>>>Ok, the rk339 is soms sort of computer. You are receiving a stream on that >>>>computer. Now you wish to decode that stream. >>>> >>>>What is your purpose? What do you mean by decoding a stream? What has MPP >>>>got to do witht his all? >>>> >>>>Ffmpeg can decode H264. See the docs for a full example of this: >>>> >>>>https://ffmpeg.org/doxygen/trunk/decoding__encoding_8c-source.html >>>> >>>>You need more than just including .h files. The .h files can be seen as >>>>‘descriptions of stuff to be found somewhere else’. So having the .h files >>>>might make it compile, but then it won’t link or won’t run due to missing >>>>files. >>>> >>>>You need the compiled .so, .a or .dll files. So you need to compile ffmpeg >>>>yourself, or find the binaries suitable for your system. >>>> >>>>Regards, >>>> >>>>Henri Zikken >>>> >>>>Van: Libav-user < libav-user-boun...@ffmpeg.org > Namens Anton >>>>Prikazchikov >>>>Verzonden: maandag 9 april 2018 16:27 >>>>Aan: libav-user@ffmpeg.org >>>>Onderwerp: [Libav-user] How to use rkmpp decoder? >>>> >>>>Hello, >>>> >>>>I have rk3399 and installed mpp( https://github.com/rockchip-linux/mpp ). >>>> >>>>I am receiving rtsp stream using by ffmpeg(C++). >>>>And now I have to decode h264 video using by mpp but I don't understand how >>>>to do this. >>>> >>>>I found https://github.com/FFmpeg/FFmpeg/blob/master/libavcodec/rkmppdec.c >>>> and try to use this code for decoding. >>>>I stopped on the code line below: >>>>ret = ff_decode_get_packet (avctx, &pkt); >>>> >>>>This function requires .h files from ffmpeg which i have not in my compiled >>>>version. Could someone prompt can I add some flags at configuration stage >>>>for .h files or somthing else?(I don't want take these files from github >>>>src) >>>> >>>>Or maybe is there a better way for h264 decoding using by hw? >>>> >>>>Thanks, >>>>Anton Prikazchikov >>>>_______________________________________________ >>>>Libav-user mailing list >>>>Libav-user@ffmpeg.org >>>>http://ffmpeg.org/mailman/listinfo/libav-user >>> >>>_______________________________________________ >>>Libav-user mailing list >>>Libav-user@ffmpeg.org >>>http://ffmpeg.org/mailman/listinfo/libav-user >> >> >>С Уважением, >>Приказчиков Антон >>_______________________________________________ >>Libav-user mailing list >>Libav-user@ffmpeg.org >>http://ffmpeg.org/mailman/listinfo/libav-user >_______________________________________________ >Libav-user mailing list >Libav-user@ffmpeg.org >http://ffmpeg.org/mailman/listinfo/libav-user
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