This might be what you are looking for: AVStream *avformat_new_stream(AVFormatContext *s, const AVCodec *c);
Specify the correct codec when adding streams to the AVFormatContext created by avformat_alloc_output_context2(). On Mon, Jun 7, 2021 at 11:39 PM Mythili Vishalini Anbazhagan < [email protected]> wrote: > Hi, > I'm using ffmpeg libav library for live streaming via RTMP. I want to know > how to give my choice of audio and video codec for the particular format in > avformat_alloc_output_context2. > > In Detail: > The following command works perfectly for me. > ffmpeg -re -stream_loop -1 -i ~/Downloads/Microsoft_Surface.mp4 -vcodec > copy -c:a aac -b:a 160k -ar 44100 -strict -2 -f flv -flvflags > no_duration_filesize rtmp://192.168.1.7/live/surface > In the output, I have set my audio codec to be aac and copied the video > codec from input, which is H264. > I want to emulate this in the library, but don't know how to. > avformat_alloc_output_context2, with parameter format name as "flv", sets > oformat audio codec to ADPCM_SWF and video codec to FLV1. How to change > that to AAC and H264 ? > > So far, used av_guess_format to construct AVOutputFormat. It accepts only > format as input. And I don't know where to mention audio and video codec. > Also tried giving filename to avformat_alloc_output_context2 with the rest > of the parameters NULL. The file has AAC audio and H264 video. But still > ffmpeg loads oformat with ADPCM_SWF audio and FLV1 video codecs. > > Any hint/guidance is hugely appreciated. Thank you. > > _______________________________________________ > 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". >
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