Roku captions: app setting or player mode?
Missing Roku captions? Check the app setting, Roku mode and title track before resetting everything.
Writer — IPTV and streaming technology
NAGOU OLIVIRIER, FREDERIC
NAGOU OLIVIRIER, FREDERIC specializes in IPTV and streaming technology, with 7 years of experience. At Mavlenzo, he covers Fire TV, Google TV, Android TV and Smart TV devices, applications, network setup, 4K/HDR and technical troubleshooting.
Writing languages: French, English
Background and approach
NAGOU OLIVIRIER, FREDERIC specializes in IPTV technology, connected devices and streaming solutions, with 7 years of experience in the field.
His expertise covers Amazon Fire TV, Google TV, Android TV, Apple TV and Smart TV environments, as well as streaming applications, network setup and audiovisual delivery technologies.
At Mavlenzo, he focuses on technical guides, installation procedures, device comparisons and troubleshooting playback, buffering, connectivity and compatibility problems.
He also follows 4K and HDR technology, network performance and settings that affect streaming quality. His editorial goal is to make technical subjects accessible through structured explanations, practical advice and verifiable information.
Areas of focus
- Fire TV, Google TV and Apple TV guides
- IPTV applications and installation
- Wi-Fi, Ethernet and troubleshooting
- 4K, HDR, codecs and compatibility
- Device comparisons and testing
Sources, testing and corrections
Our editorial work uses identified sources and prioritizes official documentation for service, application and device specifications. Documented instructions are distinguished from hands-on procedures and tests actually performed.
When an article presents a test, it should state the conditions and limitations. New information or a reported error may lead to a correction.
Report an error or contact the editorial teamPublished articles
Netflix 4K: compare the TV app and HDMI player
Does your TV app show 4K while your HDMI player shows HD? Compare the labels and picture using a worksheet for two titles on two routes.
Netflix narration or VoiceOver on Apple TV? Choose the setting
A voice narrates scenes or reads menus? Separate the Netflix audio track from VoiceOver on Apple TV 4K and choose the matching setting.
Samsung TV: record the four correct identifiers
Model code, serial number, TV software and app version: find the right value before a download or support request.
Netflix parental controls: choose the right setting for each profile
Maturity rating, blocked title or PIN: choose the right Netflix control and check the other profiles. A practical worksheet for Canadian households.
Netflix download blocked: identify the limit before deleting
Expired title, download allowance, too many devices or a last-download warning: identify the Netflix message and consequences before removing your files.
Samsung TV app not working: choose before resetting
A Samsung TV app closes or will not open? Compare restart, app deletion and Smart Hub reset, their effects and the check to repeat before erasing settings.
Crave and ICI TOU.TV: TV app, Chromecast or AirPlay in Canada?
Compare Crave and ICI TOU.TV viewing routes: ad-supported casting limits, LG apps, integrated or external Chromecast, and relevant receiver help.
AirPlay not working? Choose the next useful check
Missing button, missing TV or playback failure? Choose AirPlay checks for your iPhone or iPad, then prepare a useful support worksheet.
Roku remote pairing: choose the right buttons and checks
Simple or voice remote, with or without a pairing button? Choose the right Roku steps and separate pairing, remote restart, TV volume and app access.
Netflix NW-2-5: choose the right connection checks
Choose useful Netflix NW-2-5 checks for your device and network, record the results and prepare a clear worksheet for your Internet provider.
Apple TV no sound: choose the right diagnostic route
Apple TV box, app or AirPlay? Choose the checks for your setup, compare symptoms and prepare useful details for support.