----- Original Message ----- > From: "Wiebe Cazemier" <[email protected]> > To: "This list is about using libavcodec, libavformat, libavutil, libavdevice > and libavfilter." <[email protected]> > Sent: Monday, 12 February, 2018 16:36:45 > Subject: Re: [Libav-user] Speeding up codec detection of raw bitstream
> ----- Original Message ----- >> From: "Carl Eugen Hoyos" <[email protected]> >> To: "This list is about using libavcodec, libavformat, libavutil, libavdevice >> and libavfilter." <[email protected]> >> Sent: Monday, 12 February, 2018 14:56:02 >> Subject: Re: [Libav-user] Speeding up codec detection of raw bitstream >>> >>> I was able to register only AC3 by creating an AVCodec with 'AVCodec* >>> avcodec_find_decoder (enum AVCodecID id)' and using avcodec_register >> >> What I meant was: >> Did you test to only enable the needed demuxers (and decoders) at build time? >> >> Carl Eugen > > No, actually. Is there a reason to think that makes a difference? I was able to improve matters. I did: avFormatContext->probesize = 4096; before calling 'avformat_open_input(&avFormatContext, NULL, NULL, NULL)'. It now detects it within quarter of a second. There is also 'avFormatContext->max_analyze_duration', and even though that speeds up AC3 detection, it still hangs forever on DTS. There are still a few quirks to work out when switching codec, but I think 'll manage. _______________________________________________ Libav-user mailing list [email protected] http://ffmpeg.org/mailman/listinfo/libav-user
