Installation went perfect, but Resolve shows no video

[kramer65]

Step 1: Are you in the right place?

• I have verified there are no duplicate active or recent bugs, questions, or requests.
• have verified that I am using the latest version of the playbook.

Step 2: Describe your environment

• Ansible version: ansible [core 2.17.7]
• Operating System: Ubuntu 24.04
• Ansible playbook: ?
• Role (if applicable): ?

Step 3: Describe the problem:

To start off, thanks for creating these playbooks! It's really appreciated! I installed the free version of Resolve with it with no errors. Resolve also starts without errors. When I drag a video I made with my phone into resolve and into the timeline, it shows audio, but no video. The video plays fine in any other video player on Ubuntu. Here's a screenshot of what I see:

Steps to reproduce:

1. Open Davinci Resolve
2. Open New Project
3. Drag video into timeline

Observed Results:

• I attached Davinci Resolve debug logs to this message

ResolveDebug.txt
resolve_graphics_log.txt

The relevant two lines I guess are these:

Failed to initialize OpenCL board manager for "Intel Iris Xe Graphics" (gpu:928ce290.7b092bf5): Failed to initialize OpenCL context
Codec (avc1) not Found in Repository

I found this thread about the missing AV1 codec, although later in the thread they say it has been added in Resolve 17.2. So then I tried converting my little video using a couple different codecs, but none of the ones I tried work. Here's what I tried.

ffmpeg -i input.mp4 -c:v dnxhd -profile:v dnxhr_hq -c:a pcm_s16le -vf "scale=1920:1080" output.mov
ffmpeg -i input.mp4 -c:v prores_ks -profile:v 3 -c:a pcm_s16le output2.mov
ffmpeg -i input.mp4 -c:v cfhd -q:v 1 -c:a pcm_s16le output3.mov
ffmpeg -i input.mp4 -c:v jpeg2000 -pix_fmt yuv422p -b:v 200M -c:a pcm_s16le output4.mxf
ffmpeg -i input.mp4 -c:v rawvideo -pix_fmt yuv420p -c:a pcm_s16le output5.avi
ffmpeg -i input.mp4 -c:v libx264 -pix_fmt yuv420p -profile:v high -level 4.2 -c:a aac -b:a 192k output6.mp4
ffmpeg -i input.mp4 -c:v dvvideo -s 720x576 -pix_fmt yuv420p -aspect 16:9 -c:a pcm_s16le output7.avi

Some of them do show a video track, but show no image in it. This is what I see now:

Would you have any idea what the source of this problem could be? Is it missing codecs? Is my Intel GPU the problem? Any tips would be really welcome! I really really want to start using DaVinci Resolve!

Expected Results:

• That it shows video :-)

Relevant Code:

I don't know of any relevant code.

Error/Log Output:

See attached files above

[leinardi]

Frankly I'm not an expert of DaVinci Resolve (I created the playbook to help a friend to install it, I don't use it). But, if I have to guess, I would say that it is a codec issue.
You could try to convert it this way, it worked for another user with a similar problem: #21 (comment)

I'm able to import mp4 videos, mkv doesn't work and I don't any preview of the video but it's caused by the encoding, I was able to fix that by reencoding my test video using ffmpeg -i input.mp4 -vcodec vp9 -acodec mp3 output.mp4 so I assume this is not caused by this installer but from the software itself or missing libraries on my end.

[zeyad-shaban]

Did you found the solution cuz i'm experience the same thing, i even got resolve studio and still can't decode the videos, nothing, i tried many codec formats but nothing is working

is it that i don't have nvidia gpu or something?

[leinardi]

Have you already tried this?
https://old.reddit.com/r/davinciresolve/comments/105prnw/resolve_video_playblack_shows_black_screen_when/j3c3csv/
https://old.reddit.com/r/davinciresolve/comments/rxja4q/got_davinci_working_on_linux_with_opencl_blank/
https://old.reddit.com/r/davinciresolve/comments/rxja4q/got_davinci_working_on_linux_with_opencl_blank/