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VAAPI H.264 Encoding Fails (SIGABRT in i965 driver) on Intel Haswell GPU (HD 4400) with HEVC Input #5968
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opened 2026-02-05 11:53:45 +03:00 by OVERLORD
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Reference: immich-app/immich#5968
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Originally created by @andresichelero on GitHub (May 6, 2025).
I have searched the existing issues, both open and closed, to make sure this is not a duplicate report.
The bug
When Immich attempts to transcode an input video file originally encoded with HEVC (H.265), targeting H.264 output using VAAPI acceleration, the FFmpeg process consistently crashes. The crash occurs after VAAPI has successfully initialized with the correct i965 driver but during the setup or initial processing phase of the h264_vaapi encoder. The crash manifests as a SIGABRT signal received by FFmpeg, originating from an assertion failure within the i965 driver code -
Assertion \obj_surface->fourcc == VA_FOURCC_NV12' failed.Current Behavior:
Troubleshooting Done:
Could the bundled VAAPI drivers/libraries within the immich-server image, particularly the i965 driver used by the Jellyfin FFmpeg build, be investigated or updated to resolve this crash on older-but-VAAPI-capable Intel hardware like Haswell? Alternatively, could the base image dependencies be fixed to allow installation of standard Debian bookworm VAAPI packages without conflict?
The OS that Immich Server is running on
Ubuntu Server 24.04.2 LTS Codename: noble
Version of Immich Server
v1.132.3
Version of Immich Mobile App
Not used
Platform with the issue
Your docker-compose.yml content
Your .env content
Reproduction steps
Relevant log output
Additional information
Hardware and Software info:
Immich Transcoding Settings (Admin UI):
@mertalev commented on GitHub (May 6, 2025):
I think the issue is that the input video is 10-bit while your processor only supports 8-bit processing. The assertion means the input is in p010 or similar rather than nv12. It should work if you enable tone-mapping as this is currently done in software when hardware decoding is disabled. However, this is not a processor generation we're optimizing for and the behavior here can change in the future. It's much faster to move the tone-mapping to the hardware instead and only do the decoding in software, at which point this issue will reoccur.
@andresichelero commented on GitHub (May 6, 2025):
Thanks for the suggestion regarding 10-bit input. However, I've investigated further and confirmed the issue also occurs with an 8-bit HEVC input file.
I triggered the transcoding again with Hardware Decoding OFF and Tone Mapping ON (set to Hable). The FFmpeg process still crashed with the exact same
SIGABRTand assertion failure:ffmpeg: i965_gpe_utils.c:518: gen7_gpe_set_surface2_state: Assertion 'obj_surface->fourcc == VA_FOURCC_NV12' failed.Here is the
mediainfooutput for the specific 8-bit HEVC video that caused the crash this time:And here are the relevant FFmpeg logs showing the crash with this 8-bit input and Tone Mapping enabled:
This confirms the problem is not specific to 10-bit input and seems to be a more general issue with the HEVC -> H.264 pipeline using the bundled i965 driver on Haswell hardware, even when the input is standard 8-bit. Anyway, I understand that this hardware generation is not a priority in terms of optimization, so please assign the level of urgency you deem appropriate. Thanks again for taking the time to look into this.
@mertalev commented on GitHub (May 6, 2025):
Hmm, that's interesting. Can you set the log level to debug, try transcoding again and share the FFmpeg command outputted in the logs?
@andresichelero commented on GitHub (May 6, 2025):
Sure! I've set
IMMICH_LOG_LEVEL=debugin the.envfile and restarted the containers. I then triggered the transcoding for another 8-bit HEVC video file and here it is:@mertalev commented on GitHub (May 6, 2025):
Can you run this and confirm if it succeeds?
@andresichelero commented on GitHub (May 6, 2025):
Thanks for providing the specific command to test. I ran it inside the
immich_servercontainer as requested.The command failed, but with a different error than the previous
SIGABRT/ assertion failure. This time, the error occurred during the FFmpeg filtergraph initialization phase.Here is the full output:
Error messages:
Impossible to convert between the formats supported by the filter 'Parsed_hwupload_0' and the filter 'auto_scale_0'[vf#0:0 @ 0x647c7c181f80] Error reinitializing filters![vf#0:0 @ 0x647c7c181f80] Task finished with error code: -38 (Function not implemented)It appears the failure is happening within FFmpeg's filter setup, rather than the previous crash inside the i965 driver itself.
@andresichelero commented on GitHub (May 6, 2025):
I also ran the same command with debug instead of verbose and got a bit more info:
@mertalev commented on GitHub (May 6, 2025):
How about if you switch the order of
format=nv12andhwupload:@andresichelero commented on GitHub (May 6, 2025):
Wow, that absolutely did the trick! 🎉
Solution: adding the
format=nv12filter to the ffmpeg command, with filter order set to-vf format=nv12,hwupload=extra_hw_frames=64.Can confirm that the resultant file is working too. The only logs about the filters now is
[format_out_0_1 @ 0x748c98002740] auto-inserting filter 'auto_aresample_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_1'mediainfofrom the result file (for reference if needed):Thank you for your help! I really appreciate you taking the time to guide me through the troubleshooting steps and providing the specific commands to test.