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Media Debugging Tips: Difference between revisions
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= Diagnosing and Reporting Media Playback Issues in Firefox = | |||
== Basic Media Playback Issues == | |||
For simple playback issues (videos on popular sites that fail to play back properly), the first place to start is to check the [https://firefox-source-docs.mozilla.org/devtools-user/web_console/ web developer console] for error messages related to format issues. If you see messages here related to media playback errors, please file a [https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Audio%2FVideo Bugzilla report], note any errors you see in the console, and please include the URL to the video you're experiencing issues with. | For simple playback issues (videos on popular sites that fail to play back properly), the first place to start is to check the [https://firefox-source-docs.mozilla.org/devtools-user/web_console/ web developer console] for error messages related to format issues. If you see messages here related to media playback errors, please file a [https://bugzilla.mozilla.org/enter_bug.cgi?product=Core&component=Audio%2FVideo Bugzilla report], note any errors you see in the console, and please include the URL to the video you're experiencing issues with. | ||
== Playback Performance Issues == | |||
For playback performance issues and general media playback problems, capturing and reporting a Firefox Performance Profile can help Mozilla developers diagnose the issue. Please visit [https://profiler.firefox.com/ profiler.firefox.com] to access the profiling feature in Firefox. We also have a [https://firefox-source-docs.mozilla.org/performance/reporting_a_performance_problem.html Firefox Profiler Getting Started Guide] to learn how to record a profile. Note, before recording, please select the 'Media' setting in the profiler toolbar dropdown menu. Once you have a profile recorded of the media playback issue, you can post the resulting profile url to your Bugzilla report for analysis. | For playback performance issues and general media playback problems, capturing and reporting a Firefox Performance Profile can help Mozilla developers diagnose the issue. Please visit [https://profiler.firefox.com/ profiler.firefox.com] to access the profiling feature in Firefox. We also have a [https://firefox-source-docs.mozilla.org/performance/reporting_a_performance_problem.html Firefox Profiler Getting Started Guide] to learn how to record a profile. Note, before recording, please select the 'Media' setting in the profiler toolbar dropdown menu. Once you have a profile recorded of the media playback issue, you can post the resulting profile url to your Bugzilla report for analysis. | ||
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8) Copy the resulting profile URL and post this to your Bugzilla report.<br /> | 8) Copy the resulting profile URL and post this to your Bugzilla report.<br /> | ||
== Advanced Diagnosis == | |||
In some cases developers will ask reporters to capture detailed media processing logs. This can help diagnose low level content format problems or incompatibilities. If you have already reported a bug in Bugzilla, you can capturing detailed logging as well to help diagnose. | In some cases developers will ask reporters to capture detailed media processing logs. This can help diagnose low level content format problems or incompatibilities. If you have already reported a bug in Bugzilla, you can capturing detailed logging as well to help Mozilla engineers diagnose the problem. | ||
=== General Media Playback Logging Steps === | |||
1) Open a tab and visit about:logging<br /> | 1) Open a tab and visit about:logging<br /> | ||
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These instructions in video: https://paul.cx/public/about-logging-presentation.webm | These instructions in video: https://paul.cx/public/about-logging-presentation.webm | ||
=== DRM Related Logging Steps === | |||
For DRM content (Amazon Prime, Netflix) it can be helpful to generate EME related logging. The steps to produce these logs are bit more involved compared to basic media playback logging but are worth the effort when tracking down these types of issues. Try these steps:<br/> | For DRM content (Amazon Prime, Netflix) it can be helpful to generate EME related logging. The steps to produce these logs are bit more involved compared to basic media playback logging but are worth the effort when tracking down these types of issues. Try these steps:<br/> | ||