摘要:之前對的標(biāo)簽有過一陣子研究,主要用來判斷視頻文件在播放時事件觸發(fā)的順序。羅列了下實際有用的事件屬性元數(shù)據(jù)包括時長,尺寸以及文本軌道當(dāng)前幀數(shù)據(jù)可用,可以播放當(dāng)前及至少下一幀是可以播放的
之前對html的video標(biāo)簽有過一陣子研究,主要用來判斷視頻文件在播放時事件觸發(fā)的順序。
羅列了下實際有用的事件屬性:
loadstart: happened after load() method. The UA begins looking for media data.
durationchange: get the duration info of the media
loadedmetadata: The UA has determined the duration and dimesion(元數(shù)據(jù)包括:時長,尺寸以及文本軌道)
loadeddata: 當(dāng)前幀數(shù)據(jù)可用,for the first time
progress: The UA is fetching media data
canplay: 可以播放當(dāng)前及至少下一幀是可以播放的, readyState is newly to HAVE_Future_DATA
canplaythrough: readyState is newly to HAVE_ENOUGH_DATA
play: paused is newly false, after()
pause: paused is newly true
playing: playback is ready to start after having been paused or delayed due to lack of media data(readyState is equal to or greater than HAVE_FUTURE_DATA)
abort: UA stops fetching media data before it is completely download but not due to an error
waiting: Playback has stopped because the next frame is not available but UA expects that frame to become avaiable in due course
suspend: UA is intentionally not fetching media data currently
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