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I am trying to transcode an audio of video. I have a live stream(video-h264, audio-mp2). I need to convert an audio to aac codec and stream it. I don't want to waste a lot of resource for video processing. How can I do it with ffmpeg? (I have already tried with copy option.)

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This is what I use to convert mkv's so that they work on my Chromecast with AAC audio:

ffmpeg -i $1 -vcodec copy -c:a aac -strict experimental output-transcoded.mkv
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    You don't need -strict experimental to use the encoder aac unless your ffmpeg is outdated. – llogan May 27 '17 at 3:45
  • OK. Cheers. I will remove that part and see if it still works. I actually copied it from another post somewhere a while ago. – bitofagoob May 27 '17 at 5:57

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