I'm new to ffmpeg and I was trying to find out how to convert a audio or video file from one format to another. I don't want to use CLI, I just want to know if I can use ffmpeg as a library and call a function to convert a file from one format to another. I went through the documentation and found functions avcodec_encode_audio and avcodec_encode_video but its not clear how I can use this to convert. A tutorial or an example will be very helpful.
Using ffmpeg convert a file from one format to another
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usually i do this by command line
here i/p file is input.mp4 which will be converted into out.mkv with having same codec of all elementary stream
NOTE: upper command will only work when the input.mp4 's all codec will be supported by .mkv container.
and if you are not concern with codec then use
this will convert mp4 to mkv (if necessary it will also change codec of output format)