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我試圖從mp4文件創建自適應流。我在流媒體方面擁有相當豐富的經驗，並且已經通過Silverlight成功實現了流暢的流媒體。我們希望爲HTML5中的所有工作提供解決方案。我正在追求DASH。所以這裏是我採取的步驟...DASH包（mpd）我提出onratechange事件後凍結
- 使用ffmpeg重新採樣mp4到不同的大小。
- 確保文件使用Bento4s mp4Fragment實用程序正確分段。
- 使用Bento4s mp4dash實用程序創建DASH mpd文件和關聯的段。
我已經做了大量的工作來學習這些工具中的每一個，並創建一個獲得輸出的過程，我認爲它會工作。創建可靠的DASH文物。但似乎我做錯了什麼。這裏是我運行的命令行的例子。
對於第一步，我創建了三個不同的文件......對於三種不同的速率和尺寸......（這些可能不是確切的命令行，它們來自舊筆記...但參數值是我的我確定使用）
ffmpeg -y -i C:\_SIMULATED_SHARE_C\ff\big_buck_bunny.mp4 -c:v libx264 -x264opts keyint=24:min-keyint=24:no-scenecut -b:v 1500k -maxrate 1500k -bufsize 1000k -vf "scale=-1:720" C:\_SIMULATED_SHARE_C\ff\output\outputfile720.mp4
ffmpeg -y -i C:\_SIMULATED_SHARE_C\ff\big_buck_bunny.mp4 -c:v libx264 -x264opts keyint=24:min-keyint=24:no-scenecut -b:v 800k -maxrate 800k -bufsize 500k -vf "scale=-1:540" C:\_SIMULATED_SHARE_C\ff\output\outputfile540.mp4
ffmpeg -y -i C:\_SIMULATED_SHARE_C\ff\big_buck_bunny.mp4 -c:v libx264 -x264opts keyint=24:min-keyint=24:no-scenecut -b:v 400k -maxrate 400k -bufsize 400k -vf "scale=-1:360" C:\_SIMULATED_SHARE_C\ff\output\outputfile360.mp4
因此，這給你三個需要分割的文件。所以我使用Bento4的mp4fragment實用程序對它們進行分段。該命令行很簡單，所以我不會提供一個示例。
我使用Bento4s mp4dash來創建短劃線。像這樣的東西...
"E:\\_INSTALL\\Bento4\\Bento4-SDK-1-4-3-607.x86-microsoft-win32-vs2010\\Bento4-SDK-1-4-3-607.x86-microsoft-win32-vs2010\\bin\\mp4dash.exe --mpd-name=\"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\dash\\something.mpd\" -f -o \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\dash\" \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\bunny360f.mp4\" \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\bunny540f.mp4\" \"\\\\d9fqt52\\_SIMULATED_SHARE_C\\ff\\output\\bunny720f.mp4\" "
這運行正常。然後創建mpd文件，一個帶段文件的音頻文件夾，一個帶有3個文件夾的視頻文件夾，每個文件夾都帶有段文件。
我可以配置IIS來播放mpd ok。以及分區文件。視頻播放良好...然後停止。它在50到60秒之間凍結。在它凍結之前，我可以確認引發了HTML5視頻標籤的onratechange事件。這是一個隨着遊戲速度改變而增加的事件。我沒有做任何改變，只是發生。
有問題的實際視頻大約1小時。另外我使用dash.js庫作爲播放器。
如果你能識別任何組件或細節，我應該改變，請讓我知道！
UPDATE ON 2016年3月7日
如這裏要求的是MPD的內容...
<?xml version="1.0" ?>
<MPD mediaPresentationDuration="PT51M51.909S" minBufferTime="PT0.80S" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" xmlns="urn:mpeg:dash:schema:mpd:2011">
<!-- Created with Bento4 mp4-dash.py, VERSION=1.6.0-607 -->
<Period>
<!-- Audio -->
<AdaptationSet lang="en" mimeType="audio/mp4" segmentAlignment="true" startWithSAP="1">
<SegmentTemplate duration="801" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4f" startNumber="1" timescale="1000"/>
<Representation audioSamplingRate="48000" bandwidth="132491" codecs="mp4a.40.2" id="audio/en">
<AudioChannelConfiguration schemeIdUri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="2"/>
</Representation>
</AdaptationSet>
<!-- Video -->
<AdaptationSet maxHeight="720" maxWidth="1280" mimeType="video/mp4" minHeight="540" minWidth="640" segmentAlignment="true" startWithSAP="1">
<SegmentTemplate duration="801" initialization="$RepresentationID$/init.mp4" media="$RepresentationID$/seg-$Number$.m4f" startNumber="1" timescale="1000"/>
<Representation bandwidth="785536" codecs="avc1.64001F" frameRate="30000/1001" height="540" id="video/1" scanType="progressive" width="960"/>
<Representation bandwidth="403537" codecs="avc1.64001E" frameRate="30000/1001" height="360" id="video/2" scanType="progressive" width="640"/>
<Representation bandwidth="1496514" codecs="avc1.64001F" frameRate="30000/1001" height="720" id="video/3" scanType="progressive" width="1280"/>
</AdaptationSet>
</Period>
</MPD>
UPDATE ON 2016年3月7日
這裏是控制檯輸出對於兩個不同的視頻，這些視頻在50至60年代之間因某種未知原因而停止拍攝
///ABS VIDEO
58393][rulesController] [RULES]: playbackTimeRule [Fragment:download,82,MediaSegment,0video] Default
dash.all.js:11 [58395][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,82,MediaSegment,0,video] Default
dash.all.js:11 [58401][indexHandler][audio] Getting the request for time: 82.082
dash.all.js:11 [58403][indexHandler][audio] Index for time 82.082 is 81
dash.all.js:11 [58405][indexHandler][audio] SegmentTemplate: 81.08099999999999/1361.235
dash.all.js:11 [58406][indexHandler][audio] SegmentTemplate: 82.082/1361.235
dash.all.js:11 [58407][rulesController] [RULES]: playbackTimeRule [Fragment:download,82,MediaSegment,0audio] Default
dash.all.js:11 [58417][fragmentLoader] loaded video:MediaSegment:82.082 (200, 18ms, 2ms)
dash.all.js:11 [58419][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,82,MediaSegment,0,audio] Default
dash.all.js:11 [58435][fragmentLoader] loaded audio:MediaSegment:82.082 (200, 14ms, 0ms)
dash.all.js:11 [59390][indexHandler][video] Getting the request for time: 83.083
dash.all.js:11 [59392][indexHandler][video] Index for time 83.083 is 82
dash.all.js:11 [59393][indexHandler][video] SegmentTemplate: 82.082/1361.235
dash.all.js:11 [59394][indexHandler][video] SegmentTemplate: 83.08299999999998/1361.235
dash.all.js:11 [59395][rulesController] [RULES]: playbackTimeRule [Fragment:download,83,MediaSegment,0video] Default
dash.all.js:11 [59396][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,83,MediaSegment,0,video] Default
dash.all.js:11 [59401][indexHandler][audio] Getting the request for time: 83.083
dash.all.js:11 [59403][indexHandler][audio] Index for time 83.083 is 82
dash.all.js:11 [59404][indexHandler][audio] SegmentTemplate: 82.082/1361.235
dash.all.js:11 [59406][indexHandler][audio] SegmentTemplate: 83.08299999999998/1361.235
dash.all.js:11 [59408][rulesController] [RULES]: playbackTimeRule [Fragment:download,83,MediaSegment,0audio] Default
dash.all.js:11 [59416][fragmentLoader] loaded video:MediaSegment:83.08299999999998 (200, 17ms, 1ms)
dash.all.js:11 [59418][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,83,MediaSegment,0,audio] Default
dash.all.js:11 [59437][fragmentLoader] loaded audio:MediaSegment:83.08299999999998 (200, 14ms, 1ms)
dash.all.js:11 [59902][scheduleController][video] Stalling Buffer
dash.all.js:11 [59903][bufferController][video] Waiting for more buffer before starting playback.
dash.all.js:11 [59906][scheduleController][audio] Stalling Buffer
dash.all.js:11 [59907][bufferController][audio] Waiting for more buffer before starting playback.
dash.all.js:11 [63684][playbackController] <video> ratechange: 0
///HOG VIDEO
[58250][rulesController] [RULES]: playbackTimeRule [Fragment:download,105,MediaSegment,0audio] Default
dash.all.js:11 [58266][fragmentLoader] loaded video:MediaSegment:84.105 (200, 28ms, 1ms)
dash.all.js:11 [58269][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,105,MediaSegment,0,audio] Default
dash.all.js:11 [58287][fragmentLoader] loaded audio:MediaSegment:84.105 (200, 14ms, 1ms)
dash.all.js:11 [58982][indexHandler][video] Getting the request for time: 84.906
dash.all.js:11 [58983][indexHandler][video] Index for time 84.906 is 105
dash.all.js:11 [58984][indexHandler][video] SegmentTemplate: 84.105/3111.909
dash.all.js:11 [58984][indexHandler][video] SegmentTemplate: 84.906/3111.909
dash.all.js:11 [58985][rulesController] [RULES]: playbackTimeRule [Fragment:download,106,MediaSegment,0video] Default
dash.all.js:11 [58986][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,106,MediaSegment,0,video] Default
dash.all.js:11 [58989][indexHandler][audio] Getting the request for time: 84.906
dash.all.js:11 [58990][indexHandler][audio] Index for time 84.906 is 105
dash.all.js:11 [58991][indexHandler][audio] SegmentTemplate: 84.105/3111.909
dash.all.js:11 [58992][indexHandler][audio] SegmentTemplate: 84.906/3111.909
dash.all.js:11 [58993][rulesController] [RULES]: playbackTimeRule [Fragment:download,106,MediaSegment,0audio] Default
dash.all.js:11 [59002][fragmentLoader] loaded video:MediaSegment:84.906 (200, 14ms, 1ms)
dash.all.js:11 [59003][rulesController] [RULES]: sameTimeRequestRule [Fragment:download,106,MediaSegment,0,audio] Default
dash.all.js:11 [59014][fragmentLoader] loaded audio:MediaSegment:84.906 (200, 8ms, 1ms)
dash.all.js:11 [59735][scheduleController][video] Stalling Buffer
dash.all.js:11 [59736][bufferController][video] Waiting for more buffer before starting playback.
dash.all.js:11 [59738][scheduleController][audio] Stalling Buffer
dash.all.js:11 [59739][bufferController][audio] Waiting for more buffer before starting playback.
dash.all.js:11 [61695][playbackController] <video> ratechange: 0
其實我不認爲onratechange事件不再比症狀爲播放速率確實在改變 - 它停止。我還應該注意到，我看不出有什麼錯誤。 –