On 9/4/16 5:27 PM, Charles wrote: > On 09/04/2016 10:52 AM, M N wrote: >> Gonzalo then how should I continue to read packets from input format >> context and write them to output format context? >> >> 04.09.2016, 05:14, "Charles" <[email protected]>: >>> On 09/03/2016 08:34 PM, Gonzalo Garramuño wrote: >>>> El 03/09/2016 a las 17:55, M J escribió: >>>>> Hi > > MJ, > I probably wasn't clear, each call is dependent on the return value of > the previous call. > i.e. if you did not get return 0 or EAGIN from send_packet you should > probably not call receive_frame > >>>>> >>>>> while(av_read_frame(input_ctx, pkts) == 0) >>>>> { >>>>> //decoding >>>>> int ret1 = avcodec_send_packet(input_codecCtx, pkts); >>>>> int ret2 = avcodec_receive_frame(input_codecCtx, rawFrame); > > Why don't you just print the return values. SEE av_strerror > https://ffmpeg.org/doxygen/3.1/group__lavu__error.html#ga5792b4a2d18d7d9cb0efbcfc335dce24 > > >>>>> >>>>> //encoding >>>>> avcodec_send_frame(output_codecCtx, rawFrame); >>>>> avcodec_receive_packet(output_codecCtx, pktr); > > These have return values also. > >>>>> >>>>> int ret = av_interleaved_write_frame(output_ctx, pktr); >>>>> } >>>>> ************************************************* >>>> Hi, MJ. > > Assuming everything is setup correctly, and 1 frame -> 1 packet && 1 > packet -> 1 frame > > while ( av_read_frame == 0 ) > if avcodec_send_packet == 0 > if avcodec_receive_frame == 0 > if avcodec_send_frame == 0 > if avcodec_receive_packet == 0 > av_interleaved_write_frame > > But, each of those IF's have multiple return values > What are you going to do if the return is AVERROR(EAGAIN) or AVERROR_EOF > What about the frame delay on the encoder? > > Thanks > cco Don't forget, maybe he's parsing an interleaved stream, and isn't paying attention to which stream each packet belongs to. > > > _______________________________________________ > Libav-user mailing list > [email protected] > http://ffmpeg.org/mailman/listinfo/libav-user
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