![]() Proof (note the location of the “(default)” tag): ffprobe -hide_banner input.mp4 Not all media players honor default audio stream - for example Media Player Classic don't honor it (but you may set the preference by the language of audio streams), while VLC Media Player and FFplay do. In general, remove the “default” disposition from all audio streams except one, and set it for it. set it to the audio stream 1 (by setting it to “default”: -disposition:a:1 default).remove the “default” disposition from it (by setting it to 0: -disposition:a:0 0) and.Supposing the input video has 2 audio streams, and the default audio stream is 0, we need to Use FFmpeg: ffmpeg -i input.mp4 -map 0 -c copy -disposition:a:0 0 -disposition:a:1 default output.mp4Īudio tracks (streams) are numbered from 0.
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