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Playback/Position fails when given a specific value on a specific file

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mattkhan:
this is a v peculiar possible bug

this only happens on linux, repeating the same on windows does not cause a problem
this only happens (for this specific value) with this file

for me, this is perfectly reproducible

* File > Open Media File > pick the attached file
* (optional) press pause (easier to see what position you hit but the same behaviour occurs whether paused or not)
* set the position
curl "http://127.0.0.1:12345/MCWS/v1/Playback/Position?Position=99999&Zone=-1&Token=xyz"
* works fine
* set the position again
curl "http://127.0.0.1:12345/MCWS/v1/Playback/Position?Position=100000&Zone=-1&Token=xyz"
* playback immediately ends
* start it again
curl "http://127.0.0.1:12345/MCWS/v1/Playback/Position?Position=100000&Zone=-1&Token=xyz"
* now it works fine
curl "http://127.0.0.1:12345/MCWS/v1/Playback/Position?Position=100000&Zone=-1&Token=xyz"
* playback ends again

basically it's just broken but I do not know if that is something about the length of the file that makes some bug easier to exploit. Certainly it makes it impossible to use this API call on this OS atm if it may spontaneously stop playback.

mattkhan:
this file is 6m 47s long (407s long)

the same behaviour occurs at approx the 360s mark

this is also ~89% of the way through the track

this could be coincidence but behaviour is repeatable so suggests a bug to me

mattkhan:
using the above 407.mp4 file, this does not fail completely deterministically (i.e. at the same ms) but the test does fail 100% of the time, i.e. playback abruptly terminates


--- Code: ---for i in {60..99}; do curl "http://127.0.0.1:52129/MCWS/v1/Playback/Position?Position=3${i}001&Token=xyz"; sleep 1;curl "http://127.0.0.1:52129/MCWS/v1/Playback/Position?Position=3${i}001&Token=xyz";sleep 1;done

--- End code ---

mattkhan:
tried a file 25:19 long (1519000ms), reliably dies around the ~148s mark (so about 30s to go)

mattkhan:
sample log


--- Code: ---66234449: 140519353075392: Sharing Plugins: CHTTPListenerWorker::HandleConnection: Start
66234449: 140519353075392: Sharing Plugins: CHTTPListenerWorker::HandleRequest: TCP: 127.0.0.1: GET: http://127.0.0.1:52129/MCWS/v1/Playback/Position?Position=1489001&Token=xyz
66234451: 140519353075392: Sharing Plugins: JRWebService::Process: Start
66234452: 140519353075392: Sharing Plugins: JRWebService::Process: URL: /MCWS/v1/Playback/Position?Position=1489001&Token=xyz
66234452: 140519353075392: Sharing Plugins: JRWebService::Process: Finish (0 ms)
66234452: 140519353075392: Sharing Plugins: VHTTPMessage::Write: Wrote 133 bytes
66234453: 140519353075392: Sharing Plugins: CHTTPRequestMessage::ReadPreamble: Failed to read Method
66234453: 140519353075392: Sharing Plugins: CHTTPListenerWorker::HandleConnection: Finish (3 ms)
66234453: 140519353075392: General: CReferenceCountedSocket::Close: SOCKET_DEBUG: closesocket() closing 44
66234467: 140524465092544: Playback: COSDWindow::Show: Start
66234467: 140524465092544: Playback: COSDWindow::Show: , -1, 0
66234470: 140524465092544: Playback: COSDWindow::UpdatePosition: Start
66234488: 140524465092544: Playback: COSDWindow::UpdatePosition: New position 0, 0, 0, 0
66234488: 140524465092544: Playback: COSDWindow::UpdatePosition: Finish (18 ms)
66234488: 140524465092544: Playback: CDisplayWnd::NotifyOSDHeight: Start
66234492: 140524465092544: Playback: CDisplayWnd::NotifyOSDHeight: New position 5, 389, 929, 993
66234492: 140524465092544: Playback: CDisplayWnd::NotifyOSDHeight: No OSD
66234492: 140524465092544: Playback: CDisplayWnd::NotifyOSDHeight: Finish (4 ms)
66234492: 140524465092544: Playback: COSDWindow::Show: Finish (25 ms)
66234492: 140524465092544: Playback: CJRVideoEngine::Seek: Start
66234495: 140519560660672: Playback: CJRVideoEngine::Thread: End of file reached.
66234506: 140519560660672: Playback: CJRVideoEngine::PerformSeek: Start
66234506: 140519560660672: Playback: CJRVideoEngine::PerformSeek: Finish (0 ms)
66234593: 140524465092544: Playback: CJRVideoEngine::Seek: Finish (100 ms)
66234594: 140519552267968: Playback: CJRMediaStreamVideo::Decode: Error receiving frame (-541478725)


--- End code ---

some internal overflow?

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