I finished my first animation on Krita today, but when I tried rendering it (as an mp4 file) It failed to encode the art panels, and it only played the music that I had attached. Is there anything I can do to fix this?

Which operating system and which version of krita are you using? (The latest version is 4.1.5)

Does your animation play well in krita with no noticable problems? How big is it in terms of image size and number of frames?

When you do Render Animation, what status messages do you see on the screen when it's rendering?

In the Render Animation Window, where have you set the FFMpeg utility to be located? I'd recommend that you download and use the FFMpeg utility from ffmpeg.org and choose the static build for your OS because that's always worked for me on Linux and on Windows.

Can you try doing a small and simple animation to see if that renders properly with no problems?

Well.. I'm using the latest version.. After digging around yesterday, I found out that my animation can't be played in all my video players that come with computer! It will only play if you upload it to youtube or something.

I used a windows 10

About 110 frames

After I click render, all the images get saved successfully, but when it tries to encode it stays at 0% and closes automatically.. I think it is encoding, but for some reason it doesn't want to play on movies and tv or windows media player. (When I open the file, Movies and TV opens automatically, but it only plays the audio with a black screen. But like I said before, it still plays if you upload it to youtube. Although if you upload it on discord, nobody on their phone can watch it. Honestly it's not that big of a problem anymore, but I'd like to know if I can get it to play in Movies and TV/ Windows Media Player, just so I can preview what I've made so far (It's skips a few frames in Krita, and the music plays slowly at first. About after 3 of starting starting the animation, the music tries to catch up later by playing faster.. Hence making the music choppy when previewing.)

P.S It encoded correctly once before. The file that was encoded correctly had a preview image, while the one that hadn't been encoded correctly, had a blue clapperboard for a preview image.

And this is my animation/s.. https://www.youtube.com/watch?v=ni4r6rjtw2I https://www.youtube.com/watch?v=Yiu2JEWtnPU It's kind of embarrassing.. lol. But I really want to make an animation based off my fan fiction, this is just a stepping stone anyway. I started animating about 1 week ago, and I started digital art 4 weeks ago. https://www.deviantart.com/immortalized-galaxy if you want to see anything I've been doing. I honestly don't know why I'm putting this here... Welp.. Anyway thanks for the feedback.

I have noticed a lot of the video players on Windows don't support many formats. It looks like you have figured out that based off your tests.

What I end up doing is either two things...
1. Drag the video in a web browser like Google Chrome. That has better video support than the default Windows video players
2. Download a better video player that supports more things. VLC is pretty much the best I have found (and free). https://www.videolan.org/vlc/index.html

Alright, thank you, VLC Media player worked!

Also one more thing before I close this post, do you know if there is a way to add multiple music files in Krita, and edit them? Should you use a music editor like Audacity of something? Maybe I should just ask this question in a new post, oh well.

I'd agree with scottpetrovic about the VLC player.

Just to do a check, if you like, you could upload your animation .kra file via dropbox or google-drive or https://uploadfiles.io and I'll download it and render it to .mp4 to report on what I see for rendering and for video playback.

P.S. "I started animating about 1 week ago, and I started digital art 4 weeks ago." - You've done very well. Please keep going.

P.P.S I've just read your reply (I was composing mine). I'm glad VLC works for you.

Audacity is great for stitching music clips together and for mixing down multiple tracks. I'd recommend it.

Alright, I'll try it out ^^ Hopefully it's not too hard to coordinate the change in music with my animation, is there some way to edit in audacity so that the music fades in and out with each music change? (I really need to open a new topic on this)

Audacity has all sorts of facilities including Fade In and Fade Out of a selected range. These are in the Effect menu item. It's free so it only costs your time to play with it and learn how to use it. There's probably an Audacity users forum somewhere and YouTube has many tutorials for it. Good Luck.