lr-mame 2010 and 7z format

mitu

@roslof What does 7z l avalnche.7z show ?

roslof

Path = avalnche.7z
Type = 7z
Physical Size = 4291
Headers Size = 199
Method = LZMA:16
Solid = +
Blocks = 1

   Date      Time    Attr         Size   Compressed  Name
------------------- ----- ------------ ------------  ------------------------
1996-12-24 23:32:00 .....         2048         4092  30611.c2
1996-12-24 23:32:00 .....         2048               30614.c3
1996-12-24 23:32:00 .....         2048               30612.d2
1996-12-24 23:32:00 .....         2048               30615.d3
1996-12-24 23:32:00 .....         2048               30613.e2
1996-12-24 23:32:00 .....         2048               30616.e3
------------------- ----- ------------ ------------  ------------------------
1996-12-24 23:32:00              12288         4092  6 files

mitu

@roslof said in lr-mame 2010 and 7z format:

Method = LZMA:16

that's different from my test ROM, which had

Method = LZMA2:21

Can you re-pack the file using the 7z on your RetroPie installation ? Just

unzip "$HOME/RetroPie/roms/mame-libretro/avalnche.zip" -d /tmp/avalnche
pushd /tmp/avalnche
7z a avalnche.7z *
cp avalnche.7z "$HOME/RetroPie/roms/mame-libretro"
popd

roslof

@mitu I'll do that, but ~~I did figure out that using method LZMA2 instead of LZMA works... :|~~ EDIT. This was incorrect. I had the emulator set for lr-mame...

Neither LZMA nor LZMA2 generated from either 7-Zip or the Pi's 7z launch for me with MAME2010.

FWIW, here is the output for the Pi .7z:

Listing archive: avalnche.7z

--
Path = avalnche.7z
Type = 7z
Physical Size = 4295
Headers Size = 203
Method = LZMA2:12k
Solid = +
Blocks = 1

   Date      Time    Attr         Size   Compressed  Name
------------------- ----- ------------ ------------  ------------------------
1996-12-24 23:32:00 ....A         2048         4092  30611.c2
1996-12-24 23:32:00 ....A         2048               30612.d2
1996-12-24 23:32:00 ....A         2048               30613.e2
1996-12-24 23:32:00 ....A         2048               30614.c3
1996-12-24 23:32:00 ....A         2048               30615.d3
1996-12-24 23:32:00 ....A         2048               30616.e3
------------------- ----- ------------ ------------  ------------------------
1996-12-24 23:32:00              12288         4092  6 files

roslof

This post is deleted!

mitu

@roslof using the same ROM (avalnche) I get the same error (files missing). Seems it's not fully .7z compliant or some compression parameters are different between the ROMs.

roslof

@mitu said in lr-mame 2010 and 7z format:

@roslof using the same ROM (avalnche) I get the same error (files missing). Seems it's not fully .7z compliant or some compression parameters are different between the ROMs.

Yes, something funky. Same ROM files work perfectly fine as a ZIP. But this also seems to be the case for all ROMs for me... Well, at least all the ones I've ever tested (maybe 30-40?).

pindapoe

I guess some bug is around this, not sense to me what is going on with .7z files

mitu

I've looked at the libretro core repository, it doesn't seem to be supporting .7z. We'll update the docs accordingly, I was about to refactor the MAME page anyway.
I found out why my test was working - I traced the core and it actually picked up the .zip file instead of the .7z, once I removed the original .zip, it stopped working.

pindapoe

@mitu Thanks for looking at it, keeping the files in zip format :)