On Tue, Mar 3, 2026 at 8:56 PM Terje J. Hanssen via Cin <[email protected]> wrote:
I wonder if "Settings|Preferences|Performance|Use HW Device" is meant to set both gpu accelerated decoding and encoding (rendering)?
No, it for decoding only, encoding controlled by preset. (I briefly tied two in one of my experimental patchsets, but decided not to do this, because I like flexibility and my GPU does not support full Vulkan pipeline anyway)
and how does this possibly interact/work with selecting video preset, compression hwaccel methods or not?
Use HW Device has available 5 options: none, vaapi, vdpau, cuda, vulkan, while qsv is missing, reason?
Because this is not hwaccel device in sense you can't just call codec with this decode method set, you need to pick specific codec name at decoding. I can add this kind of decoding in similar way mediacodec decoding works, if you can test that.
I ran two av1_qsv rendering tests on Intel AlderLake/DG2 Using HW Device: None and vaapi respectively to exemplify this
using the latest Cinelerra Infinity - built: Mar 1 2026 06:30:41
1) Settings|Preferences|Performance|Use HW Device: None
file: hdv09_04.m2t
compression av1_qsv_8b420.mp4 # Requires specific GPU hardware encoding capability # as well as required software implementation. cin_pix_fmt=nv12 profile=main # global_quality=25
libva info: VA-API version 1.23.0 libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_22 libva info: va_openDriver() returns 0 libva info: VA-API version 1.23.0 libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_22 libva info: va_openDriver() returns 0
Render::render_single: Session finished. ** rendered 5972 frames in 18.274 secs, 326.803 fps audio0 pad 64 0 (64)
Fast and adequate quality/colors, although global quality may increase it somewhat.
2) Settings|Preferences|Performance|Use HW Device: vaapi (just to test)
file: hdv09_04.m2t
compression av1_qsv_8b420.mp4 # Requires specific GPU hardware encoding capability # as well as required software implementation. cin_pix_fmt=nv12 profile=main # global_quality=25
libva info: VA-API version 1.23.0 libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_22 libva info: va_openDriver() returns 0 libva info: VA-API version 1.23.0 libva info: Trying to open /usr/lib64/dri/iHD_drv_video.so libva info: Found init function __vaDriverInit_1_22 libva info: va_openDriver() returns 0
int FFVideoConvert::convert_picture_vframe(VFrame*, AVFrame*, AVFrame*): Error retrieving data from GPU to CPU file: /Videoklipp/AV1/hdv09_04.m2t int FFVideoConvert::convert_picture_vframe(VFrame*, AVFrame*, AVFrame*): Error retrieving data from GPU to CPU file: /Videoklipp/AV1/hdv09_04.m2t int FFVideoConvert::convert_picture_vframe(VFrame*, AVFrame*, AVFrame*): Error retrieving data from GPU to CPU
Hm, strange. Does this behave the same on other input files (h264, hevc, vp9 ..) ?
file: /Videoklipp/AV1/hdv09_04.m2t Render::render_single: Session finished. ** rendered 5972 frames in 33.049 secs, 180.701 fps audio0 pad 64 0 (64)
Decoder libdav1d does not support device type vaapi. HW device init failed, using SW decode. file:/Videoklipp/QSV/hdv09-04_cin_av1_qsv_8b420.mp4 err: Operation not permitted Decoder libdav1d does not support device type vaapi. HW device init failed, using SW decode. file:/Videoklipp/QSV/hdv09-04_cin_av1_qsv_8b420.mp4 err: Operation not permitted Total excess of backups: -50 Session time: 0:22:43 Cpu time: user: 0:01:24.375 sys: 0:00:14.084 unjoined tids / owner 3 00007f88517ff6c0 / 00007f88d16b96c0 12RenderEngine 00007f886b7fe6c0 / 00007f88d16b96c0 12RenderEngine 00007f88797fa6c0 / 00007f88d16b96c0 12RenderEngine
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