feat(cuda): support current CUDA contexts#2339
Merged
Merged
Conversation
WyattBlue
force-pushed
the
cuda-current-context
branch
from
61b46e9 to
fca1878
Compare
WyattBlue
added a commit
that referenced
this pull request
Jul 13, 2026
Passing an explicit cuda_context no longer requires restating primary_ctx/current_ctx; the flags are validated only when given. current_ctx=True without cuda_context now implies primary_ctx=False. Also document CudaContext and add a changelog entry for #2339.
WyattBlue
added a commit
that referenced
this pull request
Jul 13, 2026
Passing an explicit cuda_context no longer requires restating primary_ctx/current_ctx; the flags are validated only when given. current_ctx=True without cuda_context now implies primary_ctx=False. Also document CudaContext and add a changelog entry for #2339.
WyattBlue
added a commit
that referenced
this pull request
Jul 13, 2026
Passing an explicit cuda_context no longer requires restating primary_ctx/current_ctx; the flags are validated only when given. current_ctx=True without cuda_context now implies primary_ctx=False. Also document CudaContext and add a changelog entry for #2339.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
PyTorch may initialize the CUDA primary context before PyAV, causing FFmpeg's primary_ctx setup to fail with EOPNOTSUPP. Workaround is obvious but creating a separate context also adds memory and synchronization overhead.
This exposes FFmpeg's current_ctx option through CudaContext and VideoFrame.from_dlpack, allowing callers to reuse the active context. Existing defaults remain unchanged.