コバルトポートのメディアソースとプログレッシブメディア

Question

コバルトのポートは現在、YouTubeでライブストリームを再生できません。私はいつも "再生エラー"ページを受け取ります。 調査の結果、HTMLMediaElement :: LoadResourceでは、常にLoadProgressiveを呼び出そうとしていますが、linux-x11ポートは常にLoadMediaSourceを呼び出すようです。 設定がありませんか？私は関連する場合、デバッグログを提供することができます。

src/starboard/shared/starboard/media/media_can_play_mime_and_key_systems.ccに、SbMediaCanPlayMimeAndKeySystemのサンプルのスターボード実装を使用しています。以下は

は、要求されたログです：

[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 

Answer 1

それはあなたのSbMediaCanPlayMimeAndKeySystem（）実装に問題がある可能性があります。

すべてのビデオを再生する前に、あなたは次のようにログにいくつかのクエリが表示されるはずです。ここで、このようなログを貼り付けることができれば、私はより良い推測を持つことができるかもしれ

[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 

。