Allow a theme or plugin to inspect and ultimately change the media summary.
jetpack_media_summary_output
jetpack_media_summary_output-
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filter jetpack_enable_carousel_statsFilter if Jetpack should enable stats collection on carousel views
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filter jetpack_sso_allowed_username_generate_retriesDetermines how many times the SSO module can attempt to randomly generate a user.
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filter jetpack_sync_full_sync_intervalAllows overriding of the full sync cron schedule which defaults to once every 5 minutes.
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filter jetpack_sync_incremental_sync_intervalAllows overriding of the default incremental sync cron schedule which defaults to once every 5 minutes.
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filter jetpack_sync_idc_optinAllows sites to opt in for IDC mitigation which blocks the site from syncing to WordPress.com when the home URL or site URL do not match what WordPress.com expects. The default value is either true, or the value of JETPACK_SYNC_IDC_OPTIN constant if set.
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filter jetpack_sync_before_enqueue_{$current_filter}Modify or reject the data within an action before it is enqueued locally.
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filter jetpack_sync_before_enqueue_{$action_name}Modify or reject the data within an action before it is enqueued locally.
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filter jetpack_sync_prevent_sending_post_dataFilters whether to prevent sending post data to .com Passing true to the filter will prevent the post data from being sent to the WordPress.com. Instead we pass data that will still enable us to do a checksum against the Jetpacks data but will prevent us from displaying the data on in the API as well as other services.
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action jetpack_sync_processed_actionsAllows us to keep track of all the actions that have been sent. Allows us to calculate the progress of specific actions.
Jetpack Developer Resources 