Hi all, I'm working on a small piece, well smallish, of code that is to read audio data from a stream, encode it into another format and writing it to another stream. I.e. not reading and writing to any files. The formats involved are FLV and WAV. I am trying to convert an incoming FLV stream to WAV.
I've been looking at the examples and I think I have the big picture. Probably missing some though, so please feel free to point me in the right direction. Any hints and suggestions are greatly appreciated. My first realization was to make use use of the 'init_put_byte' and ' av_open_input_stream' functions in ffmpeg. So I started fiddling around with these in my code and I almost get it working. Well, I see that my little thing reads from a stream and detects the audio, and a null video stream (FLV is video, but we are only making use of the audio portion). Well, so far, so good. I do now realize that I will have to deal with threads in moving any further. So, to my question: could you please give some advice on how correctly structure the code? I.e. what do I need to do codewise for a minimal implementation? I have looked at the examples bundled with ffmpeg and ffmpeg-java, and I think I've got the big picture as mentioned above, in which order to makes calls to the ffmpeg libs, etc. Unfortunately they all take files as input... and produces either a file output or displaying a videos in a window frame ... I realize, despite my lack of proficiency in C/C++ and threads, that I need a separate thread to read bytes (or chunks of bytes) from the input stream. Also, I might need a thread for writing to the output stream. So I guess the main thread should start these two threads. Is there anything to be considered when writing to a stream, instead of a file? I have checked out the source for both ffmpeg and mplayer as reference (also checking out ffmpeg-java as there are some good examples, but file based, e.g. ConverterExample.java which does what I want but I need streams...not files). Are there any particular source files recommended to look into for my little case? Thanks in advance, Robert _______________________________________________ libav-user mailing list [email protected] https://lists.mplayerhq.hu/mailman/listinfo/libav-user
