VideoBox demo

Involved functions

Frame splitter

Operations:

• parses a video into a chunks of 25 frames per second (this is a default value, might be more or less)
• uploads chunks to temporary bucket
• sets up pre-signed URLs for pulling and pushing frames to the temporary bucket
• sets up pre-signed URLs for deleting frames from the temporary bucket
• sets up pre-signed URL for assembled video frame from frames chunk
• triggers a set of object-detect function (number of functions can be calculated by dividing total number of frames to FPS)
• triggers bucket-daemon a recursive function that will watch on temporary bucket until requirement match.

Deployment command:

fn routes create videobox /frame-splitter --image $FN_REGISTRY/frame-splitter:0.0.34 --format json --type async --timeout 3600 --idle-timeout 10 --memory 1000
fn routes config set videobox /frame-splitter NEXT_FUNC /object-detect

Object detection

Operations:

• loops over a list of image URLs
• downloads an image, does object detection and logo placement
• puts an image back to store
• triggers segment-assembler function

Deployment command:

fn routes create videobox /object-detect --image $FN_REGISTRY/object_detect:0.0.10 --format json --type async --timeout 3000 --idle-timeout 30 --memory 400
fn routes config set videobox /object_detect DETECT_PRECISION 0.4
fn routes config set videobox /object-detect NEXT_FUNC /segment-assembler

Segment assembler

Operations:

• pulls images in parallel
• creates a video capture
• uploads a video capture to the temporary bucket
• deletes frames from temporary bucket

Deployment command:

fn routes create videobox /segment-assembler --image $FN_REGISTRY/segment-assembler:0.0.20 --format json --type async --timeout 30 --idle-timeout 20 --memory 400

Bucket daemon

Experimental recursive function.

Operations:

• watches the temporary bucket until requirement match
• if requirement match, starts a segments-assembler function
• quits with exit code 0

Deployment command:

fn routes create videobox /bucket-daemon --image $FN_REGISTRY/bucket-daemon:0.0.4 --format json --type async --timeout 50 --idle-timeout 10 --memory 256
fn routes config set videobox /bucket-daemon NEXT_FUNC /segments-assembler
fn routes config set videobox /bucket-daemon BACKOFF_TIME 5

Segments assembler

Operations:

• reads video segments in parallel
• reads frames from each video segment
• writes frames back to original bucket with name prefix test-{temporary-bucket-name}

Deployment command:

fn routes create videobox /segments-assembler --image $FN_REGISTRY/segments-assembler:0.0.5 --format json --type async --timeout 3600 --idle-timeout 20 --memory 512
fn routes config set videobox /segments-assembler NEXT_FUNC /bucket-cleaner

Bucket cleaner

Operations:

• deletes bucket and its content

Deployment command:

fn routes create videobox /bucket-cleaner --image $FN_REGISTRY/bucket-cleaner:0.0.4 --format json --type async --timeout 360 --idle-timeout 10 --memory 256

Deploy them all

fn -v deploy --all --registry `whoami`