syncing two video files

[Vincent Vega]

hi guys, i never had to do this before, so would appreciate any guidance which free software would be most suitable:

i have two edits of the same original (and no longer available) video, they are very similar though don't match frame-per-frame in many places, but i need to combine video track from file1 with audio track from file2.

what i'd like to do, is be able to open and render each file, video with its audio, as full decoded frame image sequence (thumbnails) and audio waveform, with both files just stacked vertically for convenience to see how video frames align, and then manually delete subsets of frames, with their audio, in each file until both files are exact match, with video1 in sync with audio2 (ready for hq reencode and mux).

other words need interface like this
thumbnails: [video1/frame1] [video1/frame2] etc...
audio1 waveform
thumbnails: [video2/frame1] [video2/frame2] etc...
audio2 waveform
<-> horizontal scroll <->

[raffriff42]

[dumb reply deleted]

[Vincent Vega]

dude question was if there was free software for that

[Mug Funky]

I did exactly what you describe for the Astroboy and Kimba DVDs.

not sure about free NLEs, but i used (at the time - it's going back a while) premiere with avisynth input. this way if one of the sources had obvious speed problems (like 24/23.98/25 or even drifting clocks), i could correct the majority with convertfps on the _audio_ source clip, and minimize the number of cuts i had to make to the _video_ source clip.

bottom line - set the top clip to either half-cropped or half-transparent to allow the clip underneath to show. then just cut and re-sync the top clip as needed. best done on scenechanges if you can manage it.

davinci resolve is free and will do what you need (and more!) and has good internal framerate conversion so you probably wont need avisynth input (which may not work with resolve).

[Vincent Vega]

thank you for reply, i will try that davinci -)