I confirm everything reported above, I did my own tests and everything is exactly as described. From the problem, to the solution.

I am using Bazzite with a "AMD Ryzen™ 9 7900X3D" and "AMD Radeon™ RX 7900 XTX"

The game runs again with experimental-10.0-20250515.

However cutscene videos with audio (like the intro) now displays a test pattern instead of the actual video like with Proton 9.0. The codecs used in the video file are vp9/opus in a WebM container. The videos without audio play normally.

Removing audio from the video file with ffmpeg (ffmpeg -i $input_file -c copy -an $output_file) allows the video to play normally without a test pattern.

For example, the intro video seen after starting the game (but now displays a test pattern) is located here: ~/.steam/steam/steamapps/common/Atelier Yumia/MASTER/ENG/movie/Avant.webm

The following video has no audio and plays normally: ~/.steam/steam/steamapps/common/Atelier Yumia/MASTER/CMN/movie/TUTO_BATTLE_ENCOUNT.webm This video file is seen in-game at Pause Menu -> Guide -> Help -> Combat -> Combat: Encounters

Just want to confirm/reiterate that this is still happening. Yumia is playable on Proton Experimental, but the videos with audio are still broken. Since everything works on Proton 9.0-4, there has been some sort of regression that broke the videos.

I also observed the same behaviour in other Atelier games, such as Atelier Ryza. They have the same issue of videos not playing in Proton 10/Proton Experimental, but everything works fine in 9.0-4.

I'd like to make a correction. I mistakenly thought I was using Proton 9.0-4. I was not. Dropping down to Proton 9.0-4 fixes the fmvs.

I am seeing this same issue. In case it helps troubleshoot.

General
Complete name                            : Avant.webm
Format                                   : WebM
Format version                           : Version 4
File size                                : 163 MiB
Duration                                 : 1 min 53 s
Overall bit rate                         : 12.0 Mb/s
Frame rate                               : 29.970 FPS
Encoded date                             : 2024-11-13 11:59:12 UTC
Writing application                      : TMPGEnc Video Mastering Works 7 Version 7.1.0.35
Writing library                          : TMPGEnc Video Mastering Works 7 Version 7.1.0.35

Video
ID                                       : 1
Format                                   : VP9
Format profile                           : 0
Codec ID                                 : V_VP9
Duration                                 : 1 min 53 s
Width                                    : 1 920 pixels
Height                                   : 1 080 pixels
Display aspect ratio                     : 16:9
Frame rate mode                          : Constant
Frame rate                               : 29.970 FPS
Color space                              : YUV
Chroma subsampling                       : 4:2:0
Bit depth                                : 8 bits
Default                                  : Yes
Forced                                   : No
Color range                              : Limited
Color primaries                          : BT.709
Transfer characteristics                 : BT.709
Matrix coefficients                      : BT.709

Audio
ID                                       : 2
Format                                   : Opus
Codec ID                                 : A_OPUS
Duration                                 : 1 min 53 s
Channel(s)                               : 2 channels
Channel layout                           : L R
Sampling rate                            : 48.0 kHz
Compression mode                         : Lossy
Default                                  : Yes
Forced                                   : No

[STREAM]
index=0
codec_name=vp9
codec_long_name=Google VP9
profile=Profile 0
codec_type=video
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
width=1920
height=1080
coded_width=1920
coded_height=1080
closed_captions=0
film_grain=0
has_b_frames=0
sample_aspect_ratio=1:1
display_aspect_ratio=16:9
pix_fmt=yuv420p
level=-99
color_range=tv
color_space=bt709
color_transfer=bt709
color_primaries=bt709
chroma_location=unspecified
field_order=unknown
refs=1
id=N/A
r_frame_rate=30000/1001
avg_frame_rate=30000/1001
time_base=1/1000
start_pts=0
start_time=0.000000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
DISPOSITION:non_diegetic=0
DISPOSITION:captions=0
DISPOSITION:descriptions=0
DISPOSITION:metadata=0
DISPOSITION:dependent=0
DISPOSITION:still_image=0
DISPOSITION:multilayer=0
[/STREAM]
[STREAM]
index=1
codec_name=opus
codec_long_name=Opus (Opus Interactive Audio Codec)
profile=unknown
codec_type=audio
codec_tag_string=[0][0][0][0]
codec_tag=0x0000
sample_fmt=fltp
sample_rate=48000
channels=2
channel_layout=stereo
bits_per_sample=0
initial_padding=312
id=N/A
r_frame_rate=0/0
avg_frame_rate=0/0
time_base=1/1000
start_pts=-7
start_time=-0.007000
duration_ts=N/A
duration=N/A
bit_rate=N/A
max_bit_rate=N/A
bits_per_raw_sample=N/A
nb_frames=N/A
nb_read_frames=N/A
nb_read_packets=N/A
extradata_size=19
DISPOSITION:default=1
DISPOSITION:dub=0
DISPOSITION:original=0
DISPOSITION:comment=0
DISPOSITION:lyrics=0
DISPOSITION:karaoke=0
DISPOSITION:forced=0
DISPOSITION:hearing_impaired=0
DISPOSITION:visual_impaired=0
DISPOSITION:clean_effects=0
DISPOSITION:attached_pic=0
DISPOSITION:timed_thumbnails=0
DISPOSITION:non_diegetic=0
DISPOSITION:captions=0
DISPOSITION:descriptions=0
DISPOSITION:metadata=0
DISPOSITION:dependent=0
DISPOSITION:still_image=0
DISPOSITION:multilayer=0
[/STREAM]
[FORMAT]
filename=Avant.webm
nb_streams=2
nb_programs=0
nb_stream_groups=0
format_name=matroska,webm
format_long_name=Matroska / WebM
start_time=-0.007000
duration=113.660000
size=170402935
bit_rate=11993871
probe_score=100
TAG:encoder=TMPGEnc Video Mastering Works 7 Version 7.1.0.35
TAG:creation_time=2024-11-13T11:59:12.314000Z
[/FORMAT]

@MLGBigSmoke35 Which Tekken game are you seeing this issue with? And could you give a bit more description about how to get to the particular sidequest? Could you please add a comment to the impacted Tekken game thread and tag me?

@MLGBigSmoke35 Which Tekken game are you seeing this issue with?

@alasky17 Atelier Yumia has a Tekken crossover DLC.

@MLGBigSmoke35 Which Tekken game are you seeing this issue with? And could you give a bit more description about how to get to the particular sidequest? Could you please add a comment to the impacted Tekken game thread and tag me?

Atelier Yumia had a collab with Tekken 8. https://store.steampowered.com/app/3742640/Atelier_Yumia_and_TEKKEN_Series_Collaboration_Pack/ The side quest starts after installing the dlc. After beating the boss you get an fmv cutscene. On proton experimental it shows the test pattern with no audio instead of playing the fmv properly.

Ohhhh - I had no idea, thank you!! That is even more likely the same regression then 🤞 It is still great to report all the locations of failing videos just in case since games have been known to have many different video types within the same game. Thank you again!

On Proton 9.0-4 I am able to view the video cutscenes, but there are a number of visual bugs that impede gameplay. One example is that during synthesis, a transparent Yumia's character model fills the entire screen and you cannot see the crafting interface through her. Another example is that during battle character models (such as Lenja, who isn't in my party at the time) will similarly fill up the entire screen with a transparent character model.

On Proton 9.0-4 I am able to view the video cutscenes, but there are a number of visual bugs that impede gameplay. One example is that during synthesis, a transparent Yumia's character model fills the entire screen and you cannot see the crafting interface through her. Another example is that during battle character models (such as Lenja, who isn't in my party at the time) will similarly fill up the entire screen with a transparent character model.

I have been playing Yumia on Proton 9.0-4 since Yumia's release and I never had these issues. Everything works just fine, no visual bugs at all, and everything in the crafting interface is visible. Maybe deleting the prefix and launching the game again for it to be recreated could help fix those problems.

The fix for the cutscene regression in 10.0 has now shipped with 10.0-2d. Folks should now be able to play this game (and the other Atelier games) with Proton 10. Thank you again for the report!

The fix for the cutscene regression in 10.0 has now shipped with 10.0-2d. Folks should now be able to play this game (and the other Atelier games) with Proton 10. Thank you again for the report!

I can confirm that the cutscenes seem indeed fixed with Proton 10-2 Beta! Intro video before the main menu is now playing properly with sound.

I can also confirm that Proton 10.0-2 (beta) resolves the video playback issues as well as all of the ghostly character models filling the screen when synthesizing and fighting.

FMV issue is currently broken on Proton Experimental (works on Proton 10.0-4), the game launches however it will crash during in-game FMV sequences (such as reviewing the in-game tutorials through the guide).

However it is working on Proton 10.0-4 and from GE-Proton 10-12 until 10-21 (breaks on GE-Proton 10-22)

@kisak-valve steam-3123410.tar.gz Attached

@kisak-valve I can confirm as of Proton Experimental (2026-03-13) this is now working again

@AndrewAU5 Great! And thank you for the original report alerting us to the regression :)