08918: kchampvs3: Karate Champ freezes when recording avi video while playing the game

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08918	Crash/Freeze	Minor	Always	Sep 17, 2024, 16:01	Oct 6, 2024, 08:55

Tester	rcoltrane	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Unable to reproduce	OS	Windows 10/11 (64-bit)
Status [?]	Closed			Driver	dataeast/kchamp.cpp
Version	0.266	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	08918: kchampvs3: Karate Champ freezes when recording avi video while playing the game
Description	Karate Champ freezes when attempting to record an .avi video while playing the game. This game has .inp playback issues and loses sync, so you have to record the gameplay video on the fly.
Steps To Reproduce	play the game with the aviwrite option enabled to record a video while you are playing the game. It randomly freezes at different points while you are playing it. Sometimes it even crashes, but not every time.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	kchampvs3

Attached Files

No.22333 Robbbert Senior Tester Sep 19, 2024, 06:15	I first tried by using an ordinary hard drive to store the avi and it does freeze a bit, but this is expected with such a large amount of data. Then I used a SSD instead and it was smooth, no issues. So I'd advise you to use the fastest drive you have to store the avi. It only takes a few seconds to record over a GB.
No.22334 hap Developer Sep 19, 2024, 07:03	Right, I don't think you stumbled on a bug. And I doubt it's only slow specifically on kchamp.cpp. The INP issue that you reported before: does it happen if you disable cheats and hiscore plugin? IIRC INP desyncs in MAME were fixed a long time ago. If it's only this driver, maybe an uninitialized variable somewhere, just guessing (didn't see any at first glance).
No.22344 Robbbert Senior Tester Sep 26, 2024, 08:10	Still waiting for OP to respond on the desync issue.
No.22361 Robbbert Senior Tester Oct 6, 2024, 08:55	Seems the OP lost interest or unable to provide the requested materials, so closing.