I tried obs-studio-29.1.0-1.fc36.x86_64 and it crashed just after clicking Settings button on the right of the main window. Below is an error message.

error: Encoder ID 'ffmpeg_openh264' not found
terminate called after throwing an instance of 'std::logic_error'
  what():  basic_string: construction from null is not valid
Aborted (core dumped)

Full log file is here. https://obsproject.com/logs/WHLiDCZRhiH85xKs

@kamae does it work after you do sudo dnf swap ffmpeg ffmpeg-free --allowerasing? Or if you have libavcodec-freeworld installed, does it work after you uninstall it?

(RPM Fusion's ffmpeg doesn't have openh264 enabled :/ )

I'm sorry, I had ffmpeg from rpmfusion on my system. After sudo dnf swap ffmpeg ffmpeg-free --allowerasing, the issue does not happen.

@kamae could you give positive karma then?

I'm not successfully recording a video using openh264 on obs. I'm suspecting it's a bug in ffmpeg-free because there is an error when I tried to decode an H.264 video using ffmpeg-free on Fedora 36. The package openh264 provides /usr/lib64/libopenh264.so.6, not 7 on Fedora 36.

[libopenh264 @ 0x7f618c0040c0] libopenh264.so.7: cannot open shared object file: No such file or directory: libopenh264.so.7 is missing, openh264 support will be disabled

Other functionality on obs-studio looks ok.

The package openh264 provides /usr/lib64/libopenh264.so.6, not 7 on Fedora 36. Please ignore this error. This was because I have not updated openh264.

Instead, I noticed the Auto-Configuration Wizard shows an error when configuring .

1. Run OBS with a command XDG_CONFIG_HOME=$(mktemp -d) obs.
2. Choose Optimize just for recording, I will not be streaming on the Auto-Configuration Wizard., Click Next 2 times.
3. You will see an error Failed to start up encoder. Log says a warning below.

warning: [FFmpeg aac encoder: 'test_aac'] Couldn't find encoder

Maybe it's due to ffmpeg-free not providing an encoder aac but libfdk_aac only. Assuming libfdk_aac is always provided, modification like below would resolve the issue.

diff --git a/UI/window-basic-auto-config-test.cpp b/UI/window-basic-auto-config-test.cpp
index 2d89d7347..cf7faa3c9 100644
--- a/UI/window-basic-auto-config-test.cpp
+++ b/UI/window-basic-auto-config-test.cpp
@@ -201,7 +201,7 @@ void AutoConfigTestPage::TestBandwidthThread()
        OBSEncoderAutoRelease vencoder = obs_video_encoder_create(
                "obs_x264", "test_x264", nullptr, nullptr);
        OBSEncoderAutoRelease aencoder = obs_audio_encoder_create(
-               "ffmpeg_aac", "test_aac", nullptr, 0, nullptr);
+               "libfdk_aac", "test_aac", nullptr, 0, nullptr);
        OBSServiceAutoRelease service = obs_service_create(
                serverType, "test_service", nullptr, nullptr);

@@ -569,7 +569,7 @@ bool AutoConfigTestPage::TestSoftwareEncoding()
        OBSEncoderAutoRelease vencoder = obs_video_encoder_create(
                "obs_x264", "test_x264", nullptr, nullptr);
        OBSEncoderAutoRelease aencoder = obs_audio_encoder_create(
-               "ffmpeg_aac", "test_aac", nullptr, 0, nullptr);
+               "libfdk_aac", "test_aac", nullptr, 0, nullptr);
        OBSOutputAutoRelease output =
                obs_output_create("null_output", "null", nullptr, nullptr);

why did someone push this to stable? so many problems ...