Cobalt端口媒體來源與漸進媒體

我的鈷港目前無法在Youtube上播放直播媒體。我總是收到「播放錯誤」頁面。經過一番調查，似乎在HTMLMediaElement :: LoadResource中，我們總是嘗試調用LoadProgressive，而linux-x11端口始終調用LoadMediaSource。我是否缺少配置？如果相關，我可以提供調試日誌。Cobalt端口媒體來源與漸進媒體

我在src/starboard/shared/starboard/media/media_can_play_mime_and_key_systems.cc中使用了SbMediaCanPlayMimeAndKeySystem的示例右舷實現。

下面是請求日誌：

[0616/124741:INFO:url_utils.cc(124)] Update URL to https://www.youtube.com/tv#/search?resume 
[0616/124742:INFO:fetcher_factory.cc(94)] Fetching: https://clients1.google.com/complete/search?client=yout[...] 
[0616/124745:INFO:url_utils.cc(124)] Update URL to https://www.youtube.com/tv#/watch/video/idle?v=ANM-dq5USTc&resume 
[0616/124745:WARNING:html_media_element.cc(837)] HTMLMediaElement::LoadInternal, nothing to load 
[0616/124746:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d4015"; width=426; height=240; framerate=30; bitrate=258000) -> probably/true 
[0616/124746:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401e"; width=640; height=360; framerate=30; bitrate=646000) -> probably/true 
[0616/124746:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401f"; width=854; height=480; framerate=30; bitrate=1171000) -> probably/true 
[0616/124746:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401f"; width=1280; height=720; framerate=30; bitrate=2326000) -> probably/true 
[0616/124746:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(audio/mp4; codecs="mp4a.40.5") -> not supported/false 
[0616/124746:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(audio/mp4; codecs="mp4a.40.2") -> not supported/false 
[0616/124746:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.42c00b"; width=256; height=144; framerate=30; bitrate=124000) -> probably/true 
[0616/124746:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9"; width=426; height=240; framerate=30; bitrate=236500) -> not supported/false 
[0616/124746:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9"; width=640; height=360; framerate=30; bitrate=421720) -> not supported/false 
[0616/124746:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9"; width=854; height=480; framerate=30; bitrate=768640) -> not supported/false 
[0616/124746:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9"; width=1280; height=720; framerate=30; bitrate=1521280) -> not supported/false 
[0616/124746:INFO:html_media_element.cc(213)] HTMLMediaElement::canPlayType(video/mp4; codecs="avc1.42001E, mp4a.40.2",) -> probably 
[0616/124746:INFO:html_media_element.cc(213)] HTMLMediaElement::canPlayType(application/x-mpegURL,) -> maybe 
[0616/124746:INFO:fetcher_factory.cc(94)] Fetching: https://s.youtube.com/api/stats/qoe?event=streamingstat[...] 
[0616/124746:INFO:html_media_element.cc(213)] HTMLMediaElement::canPlayType(application/x-mpegURL,) -> maybe 
[0616/124746:INFO:html_media_element.cc(213)] HTMLMediaElement::canPlayType(application/x-mpegURL,) -> maybe 
[0616/124746:INFO:fetcher_factory.cc(94)] Fetching: https://www.youtube.com/live_204?ns=yt&el=leanback&eurl[...] 
[0616/124746:WARNING:html_media_element.cc(837)] HTMLMediaElement::LoadInternal, nothing to load 
[0616/124746:INFO:html_media_element.cc(881)] HTMLMediaElement::LoadResource(https://manifest.googlevideo.com/api/manifest/hls_variant/file/index.m3u8?dover=8&ip=195.70.19.74&requiressl=yes&playlist_type=DVR&signature=0F9647CBEA834556179171D3A3FD2FEAEA373C3F.3DFC9F0879094D2E779724380C28DB9C63DDF9CE&gcr=ch&maudio=1&expire=1497632026&id=ANM-dq5USTc.6&ipbits=0&keepalive=yes&source=yt_live_broadcast&ratebypass=yes&ei=urhDWYCqDYuscvuaqJgN&itag=0&go=1&sparams=ei%2Cgcr%2Cgo%2Cid%2Cip%2Cipbits%2Citag%2Cmaudio%2Cplaylist_type%2Cratebypass%2Crequiressl%2Csource%2Cexpire&key=yt6&cpn=1nZ-rQ6kQLN1TFx9&ibw=1369843&c=TVHTML5&cver=5.20160729&ptk=ChannelsTVNigeria&oid=dxjKbku-XsIc5f9auPNeFQ&ptchn=EXGDNclvmg6RW0vipJYsTQ&pltype=contentlive, , 
[0616/124746:INFO:html_media_element.cc(873)] HTMLMediaElement::LoadInternal, using 'src' attribute url 
[0616/124746:INFO:shell_demuxer.cc(210)] this is a PROGRESSIVE playback. 
[2508:1202853151620:WARNING:thread_set_name.cc(36)] Thread name "ShellDemuxerBlockingThread" was truncated to "ShellDemuxerBlo" 
[0616/124746:WARNING:html_media_element.cc(990)] HTMLMediaElement::NoneSupported() error. 
[0616/124746:WARNING:html_media_element.cc(837)] HTMLMediaElement::LoadInternal, nothing to load 
[0616/124746:WARNING:html_media_element.cc(837)] HTMLMediaElement::LoadInternal, nothing to load 
[0616/124746:INFO:html_media_element.cc(881)] HTMLMediaElement::LoadResource(https://manifest.googlevideo.com/api/manifest/hls_variant/file/index.m3u8?dover=8&ip=195.70.19.74&requiressl=yes&playlist_type=DVR&signature=0F9647CBEA834556179171D3A3FD2FEAEA373C3F.3DFC9F0879094D2E779724380C28DB9C63DDF9CE&gcr=ch&maudio=1&expire=1497632026&id=ANM-dq5USTc.6&ipbits=0&keepalive=yes&source=yt_live_broadcast&ratebypass=yes&ei=urhDWYCqDYuscvuaqJgN&itag=0&go=1&sparams=ei%2Cgcr%2Cgo%2Cid%2Cip%2Cipbits%2Citag%2Cmaudio%2Cplaylist_type%2Cratebypass%2Crequiressl%2Csource%2Cexpire&key=yt6&cpn=1nZ-rQ6kQLN1TFx9&ibw=1369843&c=TVHTML5&cver=5.20160729&ptk=ChannelsTVNigeria&oid=dxjKbku-XsIc5f9auPNeFQ&ptchn=EXGDNclvmg6RW0vipJYsTQ&pltype=contentlive&playerfallback=1, , 
[0616/124746:INFO:shell_demuxer.cc(210)] this is a PROGRESSIVE playback. 
[0616/124746:INFO:html_media_element.cc(873)] HTMLMediaElement::LoadInternal, using 'src' attribute url 
[2513:1202853318166:WARNING:thread_set_name.cc(36)] Thread name "ShellDemuxerBlockingThread" was truncated to "ShellDemuxerBlo" 
[0616/124746:WARNING:html_media_element.cc(990)] HTMLMediaElement::NoneSupported() error. 
[0616/124746:INFO:fetcher_factory.cc(94)] Fetching: https://s.youtube.com/api/stats/qoe?event=streamingstat[...] 
[0616/124746:INFO:fetcher_factory.cc(94)] Fetching: https://www.youtube.com/live_204?ns=yt&el=leanback&eurl[...] 
[0616/124746:WARNING:html_media_element.cc(837)] HTMLMediaElement::LoadInternal, nothing to load

來源

2017-06-15 deji202

這可能是你SbMediaCanPlayMimeAndKeySystem（）實現的問題。

播放任何視頻之前，您應該看到幾個查詢日誌中這樣的：

[0615/083711:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401e"; width=640) -> probably/true 
[0615/083711:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401e"; width=99999) -> not supported/false 
[0615/083711:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9") -> not supported/false 
[0615/083711:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401e"; height=360) -> probably/true 
[0615/083711:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401e"; height=99999) -> not supported/false 
[0615/083711:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9") -> not supported/false 
[0615/083711:INFO:media_source.cc(331)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401e"; framerate=30) -> probably/true 
[0615/083711:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/mp4; codecs="avc1.4d401e"; framerate=9999) -> not supported/false 
[0615/083711:INFO:media_source.cc(322)] MediaSource::IsTypeSupported(video/webm; codecs="vp9") -> not supported/false

如果你能在這裏貼上這樣的日誌，我也許能有更好的猜測。

來源

2017-06-15 17:40:03 xiaoming

我已編輯請求的日誌的問題。 – deji202

這IsTypeSupported（）輸出看起來不錯。你有可能嘗試與linux-x64x11相同的流嗎？如果linux-x64x11正常工作，您是否可以檢查您的SbPlayer是否通過回調報告了任何錯誤消息，或者是否有任何SbPlayer *調用失敗？ – xiaoming

我曾嘗試從同一個源基礎運行linux-x64x11，它適用於直播流。我還注意到正在使用「ASYNC MEDIA SOURCE playback」，即LoadMediaSource（LoadProgressive在我的端口中被調用）。在這一點上，沒有SbPlayer被稱爲所以沒有可能的錯誤在這裏。我認爲主要問題是：有沒有一種配置可以讓鈷/ youtube始終使用「PROGRESSIVE」而不是「ASYNC MEDIA SOURCE」播放？ – deji202

Cobalt端口媒體來源與漸進媒體

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