Solution: Upgrade to latest ffmpeg and faad library version and add “ -acodec libfaad “ in front of the “-i” switch. In fact it could well be that they’ll handle it as an invalid input file. It doesn’t look like this will be handled by ffmpeg very soon. 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. The message “Error while decoding stream #0.0” is repeated continuously.

Stream #0.1(eng): Audio: libmp3lame, 22050 Hz, 2 channels, s16, 64 kb/sĬhannel element 1.0 is not allocated I understand digital filters are not magic, but I'm looking for something more from ffmpeg's (or LADSPA's) repertoire to enhance the sound more, make it more resilient to noise, sporadic coughs, perhaps lose the acquired metallic aftersound.

To apply dynamic range compression and supposedly make the softer passages (above -70dB) louder and the louder ones more even. I'm currently using highpass-frequency=300,Īs that is the range speaking voice is most prominent in, bass=frequency=100:gain=-50,īandreject=frequency=200:width_type=h:width=200, What combination of ffmpeg audio filters am I best advised to use to enhance recorded speech? It makes sense to somewhat enhance the speech clarity, reduce background static and environmental noise, etc., in the most generic terms. Using ffmpeg, I'm recording a talk, its audio with a semi-distant microphone.

Scaling ffmpeg nodejs