Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
06158 Misc. Minor Always Mar 11, 2016, 19:15 Mar 12, 2016, 19:26
Tester StHiryu View Status Public Platform MAMEUI
Assigned To Resolution No change required OS Windows Vista/7/8 (64-bit)
Status [?] Closed Driver
Version 0.171 Fixed in Version Build 64-bit
Summary 06158: cpc464, cpc6128, genesis, megadriv, snes, snespal (and more..): Wrong captured area size when recording avi output
Description In some systems, when you capture an avi output, the captured area is smaller or distorted regarding the area of the game when playing without capture video.
Steps To Reproduce Load a game with Record Avi output at MAMEUI or MESSUI in some systems like:

cpc464 and clones
genesis and clones
snes and clones
megatech and megaplay genesis based systems
nintendo supersystem
Additional Information Attached ingame and avi output snaps of some affected systems.
Regression Version
Affected Sets / Systems cpc464, cpc6128, genesis, megadriv, snes, snespal (and more..)
Attached Files
zip file icon (1,435,787 bytes) Mar 11, 2016, 19:15 Uploaded by StHiryu
Set of snaps with captured area
related to 06416Closed 32x, 32xe, 32xj: Output avi file with option -aviwrite saves cropped video 
User avatar
Mar 11, 2016, 21:12
Snapshots and AVI always default to 1:1, ie: the actual resolution used by the system.

You can use -snapsize to force a specific resolution that you wish to use and MAME will stretch or shrink the output to that size.
User avatar
Mar 12, 2016, 19:26
As mentioned, the internal resolutions are used to display 1:1 in snapshots and videos unless otherwise specified.
This is not a bug but a design of the system to ensure data is presented accurately.

Closing as this is intended behavior.