As stated before, optimization is a very resource-intensive process. With about a 50% reduction in traffic, the function is very effective. CPU Intel(R) Xeon(R) CPU E3-1230 v3 3.30GHz (8 processors).OS CentOS 6.2 (Linux version 2.6.86_64 ( mockbuild.The following is the result of a performance test with various images with a HitRatio of 0%. jpg / dims / resize / 100 x100 / optimizeĪll the other DIMS functions use a lot of system resources, but optimization is the most resource-intensive process. Let’s understand how STON will behave according to the following client request. If the keyframe interval is larger than The keyframe interval is used to split the video.If the keyframe interval is close to If the keyframe is 9 seconds and is 10 seconds, the largest multiple of the 9 (the keyframe) that does not exceed 10 (the duration) will be used to split the video (in this case, 9).If the keyframe interval is smaller than If the keyframe is 3 seconds and is 20 seconds, the largest multiple of the 3 (the keyframe) that does not exceed 20 (the duration) will be used to split the video (in this case, 18).#EXTM3U #EXT-X-TARGETDURATION:10 #EXT-X-VERSION:3 #EXT-X-MEDIA-SEQUENCE:0 #EXTINF:11.637, / video. However, as the play time gets longer, more derivative files will be created, making it harder to manage.
In this case, STON will copy the origin files as is and provide them to the clients. If your content is intended solely for iPad, Apple TV, iPhone 4 and later, and Mac OS X computers, you should use Main Level 3.1.įor existing methods, the following origin files are necessary for Pseudo-Streaming and HLS. If your app runs on older versions of iPhone or iPod touch, however, you should use H.264 Baseline 3.0 for compatibility. Note: iPad, iPhone 3G, and iPod touch (2nd generation and later) support H.264 Baseline 3.1. MP3 (MPEG-1 Audio Layer 3) 8 kHz to 48 kHz, stereo audioĪC-3 (for Apple TV, in pass-through mode only) HE-AAC or AAC-LC up to 48 kHz, stereo audio H.264 Baseline Level 3.0, Baseline Level 3.1, Main Level 3.1, and High Profile Level 4.1. What are the specifics of the video and audio formats supported?Īlthough the protocol specification does not limit the video and audio formats, the current Apple implementation supports the following formats:
The video/audio encoding format given by Apple at the time of writing (0) is shown below. If a file is not encoded for HLS, the video may freeze or the audio may not play. Therefore, smooth playback is only possible for MP4 files encoded for HLS. MP4HLS is not a transcoding that converts elementary streams (video or audio).
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