Muting sound for parts of a video

[Norbert]

Hi all,

as a relatively new Avidemux user (I use 2.6.12 64-bits on Windows 7), I regularly perform re-encoding of H.264 mp4 files using AAC as sound, downloaded from a professional tv recorder (save.tv).  Most of my activities is using the Mplayer Delogo filter (which is kind of hidden in Video-Filters-Sharpness rather than in Video-Filters-Miscellaneous, as some available documentation still says), to get rid of annoying TV station logos and temporary on-screen text which have nothing to do with the video in question.

Now, sometimes, close to the end, the TV broadcasts contain a couple of seconds nasty sound saying e.g. "And now we will be broadcasting this next very interesting item..." which I like to erase from the sound.

I have been looking for a possibility to mute a part of a video. Haven't found an option, but a little extra work will do the trick: Set the Audio Output to AAC (Faac), then Filters-Gain-Gain mode:manual(dB) and select -10.0 which is the lowest value available.

The result is not mute but lesser volume. So I produce the same process 4 times in a row, creating 4 files subsequently, and in the end (the 4th file) I have so low a volume as sound that it may be considered mute.

Before that I'd tried to disable the audio track in Audio-Select Track, which however lead to a crash when trying to append the file chunk w/o audio track to the one before which has audio.

I hope this may be helpful to someone out there.

[Jan Gruuthuse]

You could when finished editing the video, import audio from the video clip drag and drop on audacity (windows requires audacity FFmpeg import/export library, found on Optional Downloads). Manipulate the audio selection (thinking effect filter: Karaoke) or whatever you want to do with it.
Export it back to the required codec and import this afterwards in to avidemux.