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fb835c100a
Deadlock occurs when splitting files if one stream received no buffer during
the first GOP of the next file. That can happen in that scenario for example:
1) The first GOP of video is collected, it has a duration of 10s.
max_in_running_time is set to 10s.
2) Other streams catchup and we receive the first subtitle buffer at ts=0 and
has a duration of 1min.
3) We receive the 2nd subtitle buffer with a ts=1min. in_running_time is set to
1min. That buffer is blocked in handle_mq_input() because
max_in_running_time is still 10s.
4) Since all in_running_time are now > 10s, max_out_running_time is now set to
10s. That first GOP gets recorded into the file. The muxer pop buffers out
of the mq, when it tries to pop a 2nd subtitle buffer it blocks because the
GstDataQueue is empty.
5) A 2nd GOP of video is collected and has a duration of 10s as well.
max_in_running_time is now 20s. Since subtitle's in_running_time is already
1min, that GOP is already complete.
6) But let's say we overran the max file size, we thus set state to
SPLITMUX_STATE_ENDING_FILE now. As soon as a buffer with ts > 10s (end of
previous GOP) arrives in handle_mq_output(), EOS event is sent downstream
instead. But since the subtitle queue is empty, that's never going to
happen. Pipeline is now deadlocked.
To fix this situation we have to:
- Send a dummy event through the queue to wakeup output thread.
- Update out_running_time to at least max_out_running_time so it sends EOS.
- Respect time order, so we set out_running_tim=max_in_running_time because
that's bigger than previous buffer and smaller than next.
https://bugzilla.gnome.org/show_bug.cgi?id=763711
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| alpha | ||
| apetag | ||
| audiofx | ||
| audioparsers | ||
| auparse | ||
| autodetect | ||
| avi | ||
| cutter | ||
| debugutils | ||
| deinterlace | ||
| dtmf | ||
| effectv | ||
| equalizer | ||
| flv | ||
| flx | ||
| goom | ||
| goom2k1 | ||
| icydemux | ||
| id3demux | ||
| imagefreeze | ||
| interleave | ||
| isomp4 | ||
| law | ||
| level | ||
| matroska | ||
| monoscope | ||
| multifile | ||
| multipart | ||
| replaygain | ||
| rtp | ||
| rtpmanager | ||
| rtsp | ||
| shapewipe | ||
| smpte | ||
| spectrum | ||
| udp | ||
| videobox | ||
| videocrop | ||
| videofilter | ||
| videomixer | ||
| wavenc | ||
| wavparse | ||
| y4m | ||
| Makefile.am | ||