Hello all, I'm using avconv with the <https://libav.org/libavfilter.html#amix> amix function to add a watermark to an MP3 file:
avconv -i audio.mp3 -i wmark.mp3 -filter_complex amix=duration=first output.mp3 (Here, audio.mp3 is the file I want to watermark, and wmark.mp3 is the watermark itself. It contains a very low-volume watermark audible for a computer, but inaudible noise to the human ear.) However, it would be great if I could make the watermark very short. Not to limit disk usage, but so that I can recognise the watermark even when I just have a short part of the output file, later. Is it possible to make avconv repeat one input stream until the other is finished? For example, if IN1=abcdef and IN2=ab, the output would be the mix of abcdef and ababab. Is that possible? Thank you very much in advance. Kind regards, Camil Staps
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