ERROR: Postprocessing: Conversion failed!

[NickQ29]

Describe the bug
The app is consistently failing to merge the audio and video files for a very large video.

To Reproduce
Steps to reproduce the behavior:

1. Use this URL in Open Video Downloader: https://www.youtube.com/watch?v=c6QqFEb7AIg&
2. After several hours of ffmpeg attempting to merge the video and audio files once they are downloaded, an "Error: Unhandled error" message will appear and the app will stop. Clicking on the 'full error' button shows only this message: ERROR: Postprocessing: Conversion failed!

Expected behavior
I will get a functional video.

Additional info (please complete the following information):

• OS: Windows 10
• Application version: 2.5.4

Additional context
I have found mention of this on the main yt-dlp page, but I use this GUI specifically because I have no understanding of command-line usage and so can't figure out what to make of the mentions there. I likewise cannot use the v3 version as it does not appear to have a user interface at all.

The log from my second attempt at this is attached:
ytdl-log-4-23-2024-8-56.txt

[StefanLobbenmeier]

I have found mention of this on the main yt-dlp page

please link that issue then

[NickQ29]

I have found mention of this on the main yt-dlp page

please link that issue then

yt-dlp/yt-dlp#871

[StefanLobbenmeier]

Ok in the issue they said that it’s an ffmpeg issue, so there is not too much I can do there to fix it directly

but it seems there is a fix in the yt-dlp version of ffmpeg, so I think it makes sense to switch to that one for this application

As a workaround for now you can try replacing the ffmpeg binary yourself if you can find a working one

[NickQ29]

How exactly does that work? Is it just a matter of replacing the ffmpeg file in the app's binaries folder (screenshot) with the newer one or do some of the other files have to be replaced as well?

[StefanLobbenmeier]

Just that one should work fine 😄