ср, 7 нояб. 2018 г. в 14:44, Paul B Mahol <[email protected]>:
> On 11/7/18, Vasiliy Volkov <[email protected]> wrote: > > ср, 7 нояб. 2018 г. в 14:14, Paul B Mahol <[email protected]>: > > > >> On 11/7/18, Vasiliy Volkov <[email protected]> wrote: > >> > Hi, again, > >> > > >> > we've encountered an issue with decoding audio streams. Sometimes > audio > >> > codec headers are not aligned to PES packets (we work with mpegts). So > >> when > >> > we try to decode such streams libav decoder fails, because he can't > >> > find > >> > where to start decoding process. For such task libav has parsers, > which > >> > need to be used for correct decoding arbitrary bitstreams: first you > >> > find > >> > position of header, next send to decoder. We've find that there are > >> exists > >> > private api for such task: libavcodec/mpegaudiodecheader.h but it's > >> > private, and using it in our project is not very clean way, and all > >> public > >> > API's requires to use avio* methods which we don't like to use. > >> > > >> > Is there any other of private API way to find audio frames headers > >> > positions? > >> > > >> > >> What is wrong with using parsers? > >> > > > > Parsers are private api and when we compile libav they are not included, > > so we need to copy header file into our project and then access -- it's > not > > good way. > > Why they are not included when you compile FFmpeg? > Paul, ok, we've found why they are not included :) Not all headers take into account in Makefile: libavcodec/Makefile HEADERS = ac3_parser.h \ adts_parser.h \ avcodec.h \ avdct.h \ avfft.h \ d3d11va.h \ dirac.h \ dv_profile.h \ dxva2.h \ jni.h \ mediacodec.h \ qsv.h \ vaapi.h \ vdpau.h \ version.h \ videotoolbox.h \ vorbis_parser.h \ xvmc.h \ And libavcodec/mpegaudiodecheader.h just not selected here. > > So what is the proper way? > > Proper way is to have parsers included, and to have them automatically > used. > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user >
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