Hi, Thanks for your reply.

Yes and understood, let me clarify. The output file is for my colorist to grade within Resolve - did think however, it would play locally.

Have already rendered as MP4 and plays fine, so likely what you indicated, will not play even locally as ProRes

...So input file back into Resolve and audio is out of sync when playing within media timeline

If you import your rendered ProRes file in Vegas, any sync problem?

You may also try to remux your ProRes file using ffmpeg.

Good recommendation in troubleshooting chain. Importing ProRes file back into Vegas continues to have same sync issue - audio about 3-4 seconds behind video.

As I understand, Remuxing is mainly about replacing poor quality audio with better quality or replacement version, had not hear about it specific to sync, but then found this: http://alien.slackbook.org/blog/fixing-audio-sync-with-ffmpeg/

Had not used in years, still command line - not well versed with the process. Wondering if Streamclip would also facilitate.

Thanks

Importing ProRes file back into Vegas continues to have same sync issue - audio about 3-4 seconds behind video.

Sounds like a Vegas bug then.

I personally use Xmediarecode which is a ffmpeg free GUI.

The best way to remux would be to render your project audio in wav then remux it with the 1st rendered file. Remuxing should remove the first audio file and keep only the 2nd eith the above ffmpeg GUI.

For ffmpeg command line, there are 2 steps:

1- demux

ffmpeg -i input.mov - c:v copy - an input_demux.mov

2-Remux with new audio

ffmpeg -i input_demux.mov -i input.wav -c:v copy -c:a copy output.mov

You can save those 2 command lines in a cmd file. The batch file must be in the same folder as the video to process (ffmpeg as well)

Hope that helps.

One of several, also can't export Resolve or Media Composer projects without freezing

The best way to remux would be to render your project audio in wav then remux it with the 1st rendered file.

Understood above action.

For actions below:

1. Download the application, done
2. Go to DOS prompt and enter the command lines listed below? Hit return after each entry?
3. Save those two in a command cmd file, please elaborate
4. C:v gather that is the path specific to the folder? e.g. D: projectfoldername?
5. Does the file name replace input.wav and output.mov

Thanks, not a command guy.

For ffmpeg command line, there are 2 steps:

1- demux

ffmpeg -i input.mov - c:v copy - an input_demux.mov

2-Remux with new audio

ffmpeg -i input_demux.mov -i input.wav -c:v copy -c:a copy output.mov

You can save those 2 command lines in a cmd file. The batch file must be in the same folder as the video to process (ffmpeg as well)

To make it simple, copy the 2 above command lines in Notepad and save the file with a cmd extension. By doing that you don't need to open a command prompt. Just double click the cmd file to launch the process.

-c:v is the command for video encoding, copy in that case, -c:a is audio.

Yes, replace input.mov and input.wav by respectively your video and audio file name. Change output.mov as you like as well.

For simplicity sake, all the files (video,audio,cmd files and ffmpeg.exe) must be in the same folder.

There is an error in the first command line, thanks to auto correction...

It should be

ffmpeg -i input.mov -c:v copy -an input_demux.mov