[SOLVED] please teach me exact command to remove a part of audio

[dEnDrOn]

I use ffmpeg to convert my mp4 videos to mp3 using this command....

ffmpeg -i 'input file.mp4' -acodec libmp3lame -ab 64k -ar 44100 -ac 2 'output file.mp3'

there are some videos that have some starting dialogues and i need to remove audio for those particular seconds using ffmpeg.
How to do that ?
i want to keep same audio settings after cropping it.

Please show me what command do i use to do it...i can't figure it out using man page of ffmpeg

[marriedto51]

I wouldn't know how to do it using ffmeg, but have you considered using a graphical editor like avidemux instead?

You can install avidemux from the rpmfusion repositories: setting those up is easy if you follow the links from the yellow "Set-up Guides" at the top of the forum page.

[dEnDrOn]

Originally Posted by marriedto51

I wouldn't know how to do it using ffmeg, but have you considered using a graphical editor like avidemux instead?

You can install avidemux from the rpmfusion repositories: setting those up is easy if you follow the links from the yellow "Set-up Guides" at the top of the forum page.

avidemux is already installed on my system but i never used it.
Would you please tell me if it can crop first 20 seconds of an audio file and return the audio with exactly same quality?

---------- Post added at 05:00 PM ---------- Previous post was at 04:40 PM ----------

so, i figured it out finally....

correct command is ...

ffmpeg -ss 30 -acodec copy -i inputfile.mp3 outputfile.mp3

it copies the same setting as of original file and crops first 30 seconds of it.

[Dangermouse]

Just tried pitvi (in repos) and works quite well, just load the video and double click on the video line and you can raise or lower the volume to 0 etc.. in specific places, could be useful for more complicated editing, but if its for just the first 30s then your solution is much better and quicker.