ffmpeg：将两个单声道现场音频流组合为单个立体声流

Question

I have two live audio streams, they both are MONO streams. Now I want these two streams to merge in one stream and output to single new stream.

I am merging two input streams with following command:

ffmpeg -i rtmp://myIp:1935/live/stream1 -i rtmp://myIp:1935/live/stream2 -codec:a aac -strict -2 -filter_complex "[0:a][1:a]amerge" -f flv rtmp://myIp:1935/live/myStream

The above command works but when I listen to new stream ie myStream , both streams are able to listen but in separate channel . Means stream1 is only in Left channel and stream2 is only in Right channel .

What I want is, both input stream stream1 and stream2 should be available to both the channels (Left & Right).

I have tried lot but can't get success and I am not good at ffmpeg also. So Is there anyone who can help me in this ???

Answer 1

Basically you're on the right track with your approach. But you used the amerge filter (the same filter is named join in LIBAV). This filter combines individual mono streams into a single multichannel streams.

From your description, it looks rather that you want to achieve something different: you want to mix those two mono streams into a single mono stream. You can achieve that with the amix -Filter.