As someone who works in TV, my initial response is to adjust it in VLC on playback, but that won't save the file with the corrected audio; only play it corrected. You could open the file in a video editor, Like Davinci Resolve on Linux and slide the audio track. However, this will almost certainly cause the whole video to be re-saved and re-encoded when you save the file, which will affect the video quality. Similarly, you may be able to use Avidemux (https://avidemux.sourceforge.net/download.html) to adjust the lipsync. See https://www.simplehelp.net/2018/05/29/how-to-fix-out-of-sync-audio-video-in-an-mkv-mp4-or-avi/ for a tutorial.
Gibson Prichard Nashville, TN [email protected] On Tue, Sep 19, 2023 at 6:35 PM Curt Lundgren <[email protected]> wrote: > My brother sent me an MP4 file, about 900 MB, where the audio is at least > a second ahead of video. I'd like to process the file so lip sync is > proper, but my search engine fu is coming up short. ffmpeg seems like it > would have the capability, but I haven't found a clue in the documentation > or the man page. > > The video does not need to be changed in any way, but if possible, I'd > like to boost the audio gain by as much as 10 db. > > I'd prefer to do this on a Linux machine, something running from command > line would be ideal. Does anyone have a clue how this can be accomplished? > > Thanks > Curt Lundgren > > -- > -- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To post to this group, send email to [email protected] > To unsubscribe from this group, send email to > [email protected] > For more options, visit this group at > http://groups.google.com/group/nlug-talk?hl=en > > --- > You received this message because you are subscribed to the Google Groups > "NLUG" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/nlug-talk/CADPPtrp%3Dqnd%3DzFSQXAxjNfPQfZALp1RaXve0tpgt0fCsVTxhiA%40mail.gmail.com > <https://groups.google.com/d/msgid/nlug-talk/CADPPtrp%3Dqnd%3DzFSQXAxjNfPQfZALp1RaXve0tpgt0fCsVTxhiA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- -- You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en --- You received this message because you are subscribed to the Google Groups "NLUG" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/nlug-talk/CA%2BJ3mBCvF9JTjaUNm054fN3GSdgWRb9RefGJ9jbyEgOEfOpvSQ%40mail.gmail.com.
