Cannot record games on linux

[hughperkins]

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Issues

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• description of an issue,

If I try running the example script https://github.com/mwydmuch/ViZDoom/blob/master/examples/python/record_episodes.py on linux, then no replay files are recorded. If I run game.send_game_command('stop') every step, then a replay file is created, but with basically no gameplay in, i.e. hexdump -C ends with something like:

00000660  53 75 70 65 72 53 68 6f  74 67 75 6e 00 57 65 61  |SuperShotgun.Wea|
00000670  70 6f 6e 00 57 65 61 70  6f 6e 47 69 76 65 72 00  |pon.WeaponGiver.|
00000680  5a 6f 72 63 68 50 72 6f  70 75 6c 73 6f 72 00 00  |ZorchPropulsor..|
00000690  43 4f 4d 50 00 00 00 04  00 00 00 00 42 4f 44 59  |COMP........BODY|
000006a0  00 00 00 14 02 3f 20 38  02 02 02 02 02 02 02 02  |.....? 8........|
000006b0  02 01 11 80 08 18 00 07                           |........|
000006b8

If I run this command when `.is_episode_finished() returns True, then it is already too late: no replay file gets recorded.

I could predict when the episode is just about to finish, by looking at timeout, or if health is low, but that seems unreliable.

Looking for a reliable way to record games on a linux instance please.

• ViZDoom version you are using,

1.1.13

• information about your OS platform, distribution and environment (GCC, Python, Java, Lua versions etc.),

Ubuntu 22.04
python 3.10.4

• if you have a problem with installation/building, post pip, CMake and Make output etc.,
• if you encountered a crash, post vizdoom-crash.log that should be created in your working directory,
• if you encountered a crash or bug, provide information about scenarios you are using and configuration of the ViZDoom environment,
• any additional information, configuration, code or data that might be helpful.

To reproduce the bug:

• on linux, install a python 3.10 env, with vizdoom in
• run the script from the repository, `python examples/python/record_episodes.py
• the script will crash, because of missing replay