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This is documented in various bugs (see ffmpeg issues #800, #871, #999, #1733…). The reason for the problem as I understood it is that the ffmpeg-builtin AAC codec cannot handle an audio stream stream with index “1.0”. Still the input video is playable in all standard players (VLC, in Windows…). The resulting video is either unplayable or has no sound.
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The message “Error while decoding stream #0.0” is repeated continuously.
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Stream #0.1(eng): Audio: libmp3lame, 22050 Hz, 2 channels, s16, 64 kb/sĬhannel element 1.0 is not allocated
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