fix #17687 MSMF slow webcam startup#20327
Merged
alalek merged 2 commits intoopencv:masterfrom Jun 30, 2021
Merged
Conversation
alalek
requested changes
Jun 29, 2021
Contributor
Author
|
@alalek, I used the name OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS for better readability, hope that's okay. |
alalek
approved these changes
Jun 30, 2021
Member
alalek
left a comment
There was a problem hiding this comment.
Well done! Thank you for contribution 👍
|
I have the same issue above link on emgucv 4.5.3.4721 Is there any way to set "OPENCV_VIDEOIO_MSMF_ENABLE_HW_TRANSFORMS" in C# while using emgucv ? |
Merged
a-sajjad72
pushed a commit
to a-sajjad72/opencv
that referenced
this pull request
Mar 30, 2023
* fixes MSMF slow webcam startup * add variable to change MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS at runtime
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
3 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Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be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.
resolves #17687
Fix issue #17687 using @ercarpio suggestion to set MF_READWRITE_ENABLE_HARDWARE_TRANSFORMS to false.
Without this fix, some webcams take a few minutes to startup using MSMF on Windows, whereas it should be instantaneous.
My webcam was having this delay issue and it solved for me as well. From my experiments there were no drawbacks so far.
Would appreciate more testing on this with broader range of webcams as I don't have many to test by myself.
Kindly request @mshabunin for review, as he asked this pull request.
Pull Request Readiness Checklist
See details at https://github.com/opencv/opencv/wiki/How_to_contribute#making-a-good-pull-request
Patch to opencv_extra has the same branch name.