| Summary: | [GStreamer][MSE] Cannot play first 5 seconds of reddit video | ||||||
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| Product: | WebKit | Reporter: | Michael Catanzaro <mcatanzaro> | ||||
| Component: | Media | Assignee: | Nobody <webkit-unassigned> | ||||
| Status: | RESOLVED DUPLICATE | ||||||
| Severity: | Normal | CC: | bugs-noreply, mcatanzaro, philn | ||||
| Priority: | P2 | ||||||
| Version: | WebKit Nightly Build | ||||||
| Hardware: | PC | ||||||
| OS: | Linux | ||||||
| Attachments: |
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Description
Michael Catanzaro
2023-02-14 14:43:36 PST
Created attachment 464988 [details]
gst debug log, manually copied out of terminal scrollback
0:00:07.778926253 2 0x7f32f4009060 WARN hlsdemux gsthlsdemux.c:811:gst_hls_demux_process_manifest:<hlsdemux0> error: Could not fetch media playlist: Failed to download 'https://v.redd.it/97irrwku18ia1/HLS_AUDIO_64_K.m3u8' 0:00:07.778953565 2 0x7f32f4009060 WARN adaptivedemux gstadaptivedemux.c:690:gst_adaptive_demux_sink_event:<hlsdemux0> error: Invalid manifest. Again this hlsdemux thing... (In reply to Philippe Normand from comment #2) > 0:00:07.778926253 2 0x7f32f4009060 WARN hlsdemux > gsthlsdemux.c:811:gst_hls_demux_process_manifest:<hlsdemux0> error: Could > not fetch media playlist: Failed to download > 'https://v.redd.it/97irrwku18ia1/HLS_AUDIO_64_K.m3u8' > 0:00:07.778953565 2 0x7f32f4009060 WARN adaptivedemux > gstadaptivedemux.c:690:gst_adaptive_demux_sink_event:<hlsdemux0> error: > Invalid manifest. > > Again this hlsdemux thing... I'll send a PR to downrank hlsdemux, but I can still reproduce the issue here, suspecting a MSE bug now... There's this in the log:
0:00:09.110062115 2 0x55fe008bf1d0 DEBUG webkitmse MediaPlayerPrivateGStreamerMSE.cpp:229:seek:<MSE-media-player-11> Requested seek to {6.0175279999999995}
0:00:09.110124624 2 0x55fe008bf1d0 DEBUG webkitmediasrc WebKitMediaSourceGStreamer.cpp:725:webKitMediaSrcSendEvent:<webkitmediasrc0> Handling seek event: seek event: 0x7f17ec003310, time 99:99:99.999999999, seq-num 2623, GstEventSeek, rate=(double)1, format=(GstFormat)time, flags=(GstSeekFlags)GST_SEEK_FLAG_FLUSH, cur-type=(GstSeekType)set, cur=(gint64)6017528000, stop-type=(GstSeekType)none, stop=(gint64)0, trickmode-interval=(guint64)0;
Not sure yet, but wondering if this could be a bug on JS side... We need to know what triggers this spurious seek.
(In reply to Michael Catanzaro from comment #0) > And I swear that worked fine yesterday. P.S. The problem was I forgot that I replaced WEBKIT_FORCE_SANDBOX=0 with WEBKIT_DISABLE_SANDBOX_THIS_IS_DANGEROUS=1. I added a warning if you make that mistake, but only in the old API version, so didn't notice. There's a 6 seconds gap in the video stream... dunno why... 0:00:13.085547933 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc8006240, pts 0:00:00.000000000, dts 0:00:00.000000000, dur 0:00:00.033333333, size 21772, offset 0, offset_end none, flags 0x640 0:00:13.086617331 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc800f000, pts 0:00:00.033333333, dts 0:00:00.033333333, dur 0:00:00.033333333, size 2379, offset 21772, offset_end none, flags 0x2200 0:00:13.086748721 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc8006120, pts 0:00:00.066666666, dts 0:00:00.066666666, dur 0:00:00.033333333, size 2436, offset 24151, offset_end none, flags 0x2200 0:00:13.086869289 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3c8c009c60, pts 0:00:00.100000000, dts 0:00:00.100000000, dur 0:00:00.033333333, size 2867, offset 26587, offset_end none, flags 0x2200 0:00:13.086954903 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cec004c60, pts 0:00:00.133333333, dts 0:00:00.133333333, dur 0:00:00.033333333, size 2890, offset 29454, offset_end none, flags 0x2200 0:00:13.087026737 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc800f120, pts 0:00:00.166666666, dts 0:00:00.166666666, dur 0:00:00.033333333, size 2628, offset 32344, offset_end none, flags 0x2200 0:00:13.087114543 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc800f480, pts 0:00:00.200000000, dts 0:00:00.200000000, dur 0:00:00.033333333, size 2933, offset 34972, offset_end none, flags 0x2200 0:00:13.087203013 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc800f240, pts 0:00:00.233333333, dts 0:00:00.233333333, dur 0:00:00.033333333, size 2846, offset 37905, offset_end none, flags 0x2200 0:00:13.087335168 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc800f360, pts 0:00:00.266666666, dts 0:00:00.266666666, dur 0:00:00.033333333, size 2556, offset 40751, offset_end none, flags 0x2200 0:00:14.367678067 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc8049000, pts 0:00:06.000000000, dts 0:00:06.000000000, dur 0:00:00.033333333, size 25893, offset 621008, offset_end none, flags 0x600 0:00:14.368395124 38 0x233e6a0 TRACE webkitmediasrc WebKitMediaSourceGStreamer.cpp:539:webKitMediaSrcLoop:<webkitmediasrc0:src_V0> Pushing buffer downstream: buffer: 0x7f3cc8031000, pts 0:00:06.033333333, dts 0:00:06.033333333, dur 0:00:00.033333333, size 2247, offset 646901, offset_end none, flags 0x2200 Odd, because the same video works fine in Firefox. :/ With current main of WebKit and GStreamer I cannot reproduce this issue. You'd need https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3867 backported in your runtime and the corresponding WebKit patch. *** This bug has been marked as a duplicate of bug 251866 *** |