Program to visually sync audio and video?

[rayden54]

I've been using a combination of Audacity and AVI Mux GUI to try to sync an external audio file to a video. It seems like it's more time consuming than need be. Audio syncing is already a lot of guessing, but I can't tell how close I am without exporting the audio track and then muxing it with the original file first. I still need to be able to see the waveform, but it's more important that it appears to sync up than that the waveforms match. I don't really need to be able to edit the audio (although cut/pasting would be nice). Is there a program that'll let me do that? I know there's something similar for subtitles. I checked "audio editing" under tools, but I'm not too sure what I'm looking for.

[manono]

I don't know why you'd need to see a waveform, but I just play the two together in Media Player Classic Home Cinema (give them both the same name, like movie.avi and movie.ac3). Then use the +/- keys to adjust the delay until it 'feels' right. Use that delay when muxing or remove it entirely using DelayCut.

[Safesurfer]

There's Syncview for AVI/WAV files.

[faramith]

i use Videostudio PRO to sync spanish audio into japanese raw episodes

[AlanHK]

One way is with Avisynth.

Load the file and use AudioGraph to show the waveform, and then adjust DelayAudio to get it right.
E.g., sync muzzle flashes with gun shots, door slams, etc.

e.g.:

FFmpegSource2("vid.mkv",atrack=-1,fpsnum=-1,fpsden=1)
ConverttoRGB24().AudioGraph(1)
DelayAudio(0.2)

Once you get the right delay, you can then edit the audio and mux the corrected version with the video to fix it.