Recording GIFs is broken

[lunjesse]

Summary

Making GIFs using the GIF writer for gameboy (color) games, using either Gamebetta or GBHawk cores, creates gifs showing only a solid black screen instead of what was on screen. Example:

Repro

1. Open BizHawk
2. Open some gameboy rom
3. Go to File > AVI/WAV > Config and Record AVI/WAV
4. Select the "Gif writer" option. Name the file whatever you want.
5. Press OK on the dialogue boxes.
6. Let the emulator run for a bit
7. Go to File > AVI/WAV > Stop AVI/WAV

Check the resultant gif. It would appear as a black screen instead of gameplay footage.

Output

What I get:

What 2.4 gives instead:

Host env.

• Latest interim: 9dc32fc

[ThunderAxe31]

I also had a black screen when recording GIFs for a PSX game, in the latest devbuild.

[nattthebear]

The first gif is (or appears to have been) recorded with OSD capture off, but the second has OSD capture on. Of course both modes should work, but can you confirm which mode you're using?

[lunjesse]

The first gif is (or appears to have been) recorded with OSD capture off, but the second has OSD capture on. Of course both modes should work, but can you confirm which mode you're using?

I just tried both modes; they both fail to make a non blank gif.

[YoshiRulz]

I'd say it's malformed or corrupted rather than empty as it looks like this on my machine.

[adelikat]

Confirmed the behavior for NesHawk as well. Edited title since it is not GBC specific