Michael Bradshaw <mbradshaw@...> writes: > I've just been hunting down a bug in one of our programs, and I > tracked it down to the number of channels reported by ffmpeg. When I > first open the AVFormatContext and do avformat_find_stream_info(), I > can see that my audio stream's AVCodecContext has a reported > channel_layout of 3 (stereo) and channels == 2. However, when I call > avcodec_open2() to start decoding, it changes the streams' > AVCodecContext channel info so that channel_layout is 4 (mono) and > channels == 1! This is causing a crash in a later part of the program, > as one part of the program expects two channels and the other part > expects 1 channel. > > Two questions: > > 1) Is this "expected behavior" in any case, or is it a bug?
While I cannot really answer the question, I wonder what you expect when the number of channels really change: At least for AC-3 and AAC, this is not only allowed, but happens regularly (for example on DVB). So perhaps your application should expect a change... Carl Eugen _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user