Use AAC-LC when encoding stereo content at 80kbps and above or mono content above 40kbps, or when you want to support devices that only play AAC-LC, like the Roku or old iPods. AAC-LC allows mono and stereo, with sample rates from 8khz-96khz, and high bitrates (>300kbps). "he-aac" is the default value, which means that by default, 0-84kbps will use HE-AAC and 85kbps and up will use AAC-LC.ĪAC-LC ("Low Complexity") is the most common AAC profile, and virtually every AAC decoder supports AAC-LC. By default, Zencoder will pick the right profile based on the bitrate and number of channels used: stereo content under 40kbps will use HE-AAC v2 if max-aac-profile is set to "he-aac-v2" stereo content under 84kbps will use HE-AAC if max-aac-profile is set to "he-aac" and AAC-LC will be used for higher bitrate content, or if max-aac-profile is set to "aac-lc". The AAC audio codec has several profiles. Valid Values: aac-lc, he-aac, or he-aac-v2 (See this Apple document for more details.) For HLS outputs, we adjust the audio duration to account for the samples. The reason for this is a longer audio duration due to the fact that any time you encode aac, extra audio priming samples are added to the beginning of the audio stream. You may find that some of your videos the outputs are a few milliseconds longer than the inputs with black frames added at the end. Viewing the Brightcove System Status PageĪAC Settings This topic contains details for encoding settings related to AAC audio.Quality-Based Encoding Modes for Streaming.Using Zencoder with Google Cloud Storage. How Zencoder Saves Files When Uploads Fail.Getting Notifications When Videos Are Finished.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |