1882205 - Add telemetry to measure first frame loaded time for video

Status: RESOLVED FIXED

(Core :: Audio/Video: Playback, task, P1)

Description

[Alastor Wu [:alwu]]

I'd like to add a probe to measure how long do we need to load the first video frame. I will add the measurement within MediaDecoder::FirstFrameLoaded.

In addition, as I'm planing to optimize the first frame loading time for the media engine playback, I will categorize the result by different playback type in order to understand how well the optimization would be doing and know the difference between it and non-media-engine playback.

(1) Non-MSE playback
(2) MSE playback
(3) EME playback
// Following are Windows-only
(4) Non-MSE media-engine playback
(5) MSE media-engine playback
(6) EME media-engine playback

Comment 1

[Alastor Wu [:alwu]]

Attachment: Bug 1882205 - part1 : add a probe to measure the first frame loaded time.

Comment 2

[Alastor Wu [:alwu]]

Attachment: Bug 1882205 - part2 : add glean test.

browser_glean_first_frame_loaded_time.js tests non-media engine
situation, and browser_wmfme_glean_first_frame_loaded_time.js tests
media engine situaion, which would only be run on wmfme task.

Depends on D202775

Comment 3

[Alastor Wu [:alwu]]

Attachment: data-review-request

Comment 4

[Chris H-C :chutten]

Comment on attachment 9388774 [details]
data-review-request

PRELIMINARY NOTES:

Permanent collections require a named individual to be responsible for caretaking, but the review request form only lists the media-alerts list. I'm assuming Alastor Wu as requestor will serve that role. (If not, please supply the name of a different individual who will serve)

DATA COLLECTION REVIEW RESPONSE:

Is there or will there be documentation that describes the schema for the ultimate data set available publicly, complete and accurate?

Yes.

Is there a control mechanism that allows the user to turn the data collection on and off?

Yes. This collection can be controlled through the product's preferences.

If the request is for permanent data collection, is there someone who will monitor the data over time?

Yes, Alastor Wu is responsible.

Using the category system of data types on the Mozilla wiki, what collection type of data do the requested measurements fall under?

Category 1, Technical.

Is the data collection request for default-on or default-off?

Default on for all channels.

Does the instrumentation include the addition of any new identifiers?

No.

Is the data collection covered by the existing Firefox privacy notice?

Yes.

Does the data collection use a third-party collection tool?

No.

---

Result: datareview+

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/b528eaee79d1
part1 : add a probe to measure the first frame loaded time. r=media-playback-reviewers,jolin
https://hg.mozilla.org/integration/autoland/rev/46f80f8c13ae
part2 : add glean test. r=padenot
https://hg.mozilla.org/integration/autoland/rev/42b42e60f35b
apply code formatting via Lando

Comment 6

[Cristian Tuns]

https://hg.mozilla.org/mozilla-central/rev/b528eaee79d1
https://hg.mozilla.org/mozilla-central/rev/46f80f8c13ae
https://hg.mozilla.org/mozilla-central/rev/42b42e60f35b