Linux AppImage doesn't work with realesgran-plus --scaling-factor 2

[hyvenglaven]

Describe the bug
I am very new to the software and experimenting with different settings, with the goal to enhance older home videos. The examples provided in the --help menu work, but I run into errors when deviating from these. For instance, a scaling factor of 4 works for realesrgan-plus, but 2 does not.

To Reproduce

./Video2X-x86_64.AppImage -i standard-test.mp4 -o stardard-test-output.mp4 -s 2 -p realesrgan --realesrgan-model realesrgan-plus

Expected behavior
Not crashing.

Actual behavior
Crashes, with following message:

[2025-04-10 13:03:37] [info] Video2X version 6.4.0
[2025-04-10 13:03:37] [info] Processing file: standard-test.mp4
[2025-04-10 13:03:37] [info] Using Vulkan device: NVIDIA GeForce RTX 5070 Ti (0x2c05)
[2025-04-10 13:03:37] [info] Press [space] to pause/resume, [q] to abort.
[2025-04-10 13:03:37] [info] [FFmpeg] [libx264 @ 0x78004c3a7000] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[2025-04-10 13:03:37] [info] [FFmpeg] [libx264 @ 0x78004c3a7000] profile High, level 3.0, 4:2:0, 8-bit
[2025-04-10 13:03:37] [info] [FFmpeg] [libx264 @ 0x78004c3a7000] 264 - core 164 r3108 31e19f9 - H.264/MPEG-4 AVC codec - Copyleft 2003-2023 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=15 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=23 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
[2025-04-10 13:03:37] [error] Real-ESRGAN model param file not found: models/realesrgan/realesrgan-plus-x2.param
[2025-04-10 13:03:37] [critical] Failed to initialize filter: Operation not permitted
[2025-04-10 13:03:37] [critical] Video processing failed with error code -1

Environment:

• OS: Ubuntu 25.04 Beta
• GPU: e.g., NVIDIA GeForce RTX 5070 Ti
• Video2X Version: 6.4.0

Additional context
My attempt to run with -s 2 above was to improve the processing speed and reduce the output file size, which I'm also interested in as I was only getting ~ 1 fps on my GPU with -s 4.

If you have any general tips for initial settings that work well for enhancing/upscaling non-anime videos, and settings to tweak, that would be really helpful. I'm flying a bit blind, and I'm not sure which settings are most important, and which combinations are valid.

Thank you!

[k4yt3x]

That's because realesrgan-plus doesn't have a 2x model:

[k4yt3x]

I'm also interested in as I was only getting ~ 1 fps on my GPU with -s 4.

That's normal. This model is just slow.

realesr-generalv3 will be in the next version and it'll be faster than realesrgan-plus. Aside from that, there isn't much more you can do at this point.

[RikudouGoku]

I'm also interested in as I was only getting ~ 1 fps on my GPU with -s 4.

That's normal. This model is just slow.

realesr-generalv3 will be in the next version and it'll be faster than realesrgan-plus. Aside from that, there isn't much more you can do at this point.

Any ETA on when this will be available?

[k4yt3x]

@RikudouGoku It's already been added to the repo, just need to publish another release... I might have time to work on this project again soon, but I'm still not too sure. Too much stuff at work and other project atm.

[RikudouGoku]

@RikudouGoku It's already been added to the repo, just need to publish another release... I might have time to work on this project again soon, but I'm still not too sure. Too much stuff at work and other project atm.

If its already done, maybe you can publish an alpha/beta version of the appimage with it?

[k4yt3x]

@RikudouGoku It's already been added to the repo, just need to publish another release... I might have time to work on this project again soon, but I'm still not too sure. Too much stuff at work and other project atm.

If its already done, maybe you can publish an alpha/beta version of the appimage with it?

The build isn't fully automated yet and I've got uncommitted work locally... I'll need to finish up some work before I can make another release.

[RikudouGoku]

@RikudouGoku It's already been added to the repo, just need to publish another release... I might have time to work on this project again soon, but I'm still not too sure. Too much stuff at work and other project atm.

If its already done, maybe you can publish an alpha/beta version of the appimage with it?

The build isn't fully automated yet and I've got uncommitted work locally... I'll need to finish up some work before I can make another release.

Gotcha.

Is it possible for me to somehow add the model myself if I am using the appimage? I know nothing about this.

[k4yt3x]

@RikudouGoku it'll be difficult since the model files are bundled in. If you can compile the project though you can just use the latest HEAD on the master branch.

[RikudouGoku]

@RikudouGoku it'll be difficult since the model files are bundled in. If you can compile the project though you can just use the latest HEAD on the master branch.

I do not know how to do that. I will just wait for your next release I think. Really love Video2X so I am very grateful for what I already got.