If you only want to copy the input, there is no need to transcode. You can simply duplicate the input packets, one packet goes to the decoder so it can be shown, the other goes to the muxer for the recorder when someone presses the record button. You can save to whatever format you want but input may not be playable from the start until it reaches the key frame. Deep packet copy can be achieved with the following code:
AVPacket packet; av_init_packet(&packet); av_packet_ref(packet, src); av_packet_make_writable(&packet); You can based on the decoded frames, mark a key frame packet and start saving from there. On Wed, Jan 1, 2020 at 10:06 AM Audric Ackermann <[email protected]> wrote: > Ok thank you. > As I do not control the input parameters I will go for the transcode > option. Is there an easy way to duplicate all required decoder parameters > to the encoder? > > Like doing this, but with all important params in one step: > > Thanks > > outst->codec->width = this->codec_ctx->width; > outst->codec->height = this->codec_ctx->height; > outst->codec->pix_fmt = this->codec_ctx->pix_fmt; > outst->codec->time_base = this->codec_ctx->time_base; > _______________________________________________ > Libav-user mailing list > [email protected] > https://ffmpeg.org/mailman/listinfo/libav-user > > To unsubscribe, visit link above, or email > [email protected] with subject "unsubscribe". -- Regards Strahinja Radman
_______________________________________________ Libav-user mailing list [email protected] https://ffmpeg.org/mailman/listinfo/libav-user To unsubscribe, visit link above, or email [email protected] with subject "unsubscribe".
