05648: Games with multiple resolutions: When a game switches resolution, the screen gets cut off in -aviwrite mode

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
05648	Misc.	Minor	Always	Jul 31, 2014, 01:27	Oct 12, 2014, 18:53

Tester	ScHlAuChi	View Status	Public	Platform	MAME (Unofficial Binary)
Assigned To		Resolution	Open	OS	Windows Vista/7/8 (64-bit)
Status [?]	Acknowledged			Driver
Version	0.150	Fixed in Version		Build	Normal
		Fixed in Git Commit		Github Pull Request #

Summary	05648: Games with multiple resolutions: When a game switches resolution, the screen gets cut off in -aviwrite mode
Description	Mame determines the resolution of a game at runtime, so when you start recording in a lower resolution and the game switches to a higher resolution, the screen is cut off. The ideal behavior would be that the AVI gets split when there is a resolution change like what happens when you use MNGwrite!
Steps To Reproduce	Start flamegun.zip Start a new game and enter Level 1 Start recording a movie file (Mame will determine the games resolution to be 320x240) Finish the level and wait for the stat screen. (The stat screen is 640x480) The stat screen will not be visible in the AVI
Additional Information	If aviwrite works the same way as MNGwrite, the bug is fixed!
Github Commit

Flags
Regression Version
Affected Sets / Systems	Games with multiple resolutions

Attached Files

No.10886 Haze Senior Tester Jul 31, 2014, 19:37	well the basic problem is that AVI files can't contain multiple resolutions and refresh rates in the same stream, I'm not sure any popular video container can because it's a very uncommon requirement. the only way you're going to get a single AVI out of -aviwrite is if an option to output a pre-scaled (MAME view?) interpolated to-framerate video rather than 1:1 pixels even the mngwrite behavior isn't really desirable for things doing frequent changes.
No.10888 NekoEd Senior Tester Jul 31, 2014, 23:06	Marking feature request for further direction.
No.11051 xinyingho Tester Oct 12, 2014, 18:53	I think that mkv is one of those few containers that allow for dynamic resolution change.