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splitmuxsink: Use first buffer TS as mux start time

Browse source 
Do not use last buffer TS + buffer duration because buffer duration
might be inaccurate, especially for frame rates like 30fps where a
rounding error is observed.

https://bugzilla.gnome.org/show_bug.cgi?id=773785
This commit is contained in:
Vivia Nikolaidou 2016-11-01 19:56:36 +02:00 committed by Jan Schmidt
parent 1a4393fb4d
commit bbd4dd2fb1
2 changed files with 15 additions and 11 deletions
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24
gst/multifile/gstsplitmuxsink.c
View file

@ -258,6 +258,8 @@ gst_splitmux_sink_init (GstSplitMuxSink * splitmux)
splitmux->max_files = DEFAULT_MAX_FILES;
splitmux->send_keyframe_requests = DEFAULT_SEND_KEYFRAME_REQUESTS;
splitmux->update_mux_start_time = FALSE;
GST_OBJECT_FLAG_SET (splitmux, GST_ELEMENT_FLAG_SINK);
}
@ -642,10 +644,10 @@ request_next_keyframe (GstSplitMuxSink * splitmux)
|| splitmux->threshold_bytes != 0)
return TRUE;
ev = gst_video_event_new_upstream_force_key_unit (splitmux->fragment_id *
ev = gst_video_event_new_upstream_force_key_unit (splitmux->mux_start_time +
splitmux->threshold_time, TRUE, 0);
GST_DEBUG_OBJECT (splitmux, "Requesting next keyframe at %" GST_TIME_FORMAT,
GST_TIME_ARGS (splitmux->fragment_id * splitmux->threshold_time));
GST_TIME_ARGS (splitmux->mux_start_time + splitmux->threshold_time));
return gst_pad_push_event (splitmux->reference_ctx->sinkpad, ev);
}
@ -772,12 +774,19 @@ handle_mq_output (GstPad * pad, GstPadProbeInfo * info, MqStreamCtx * ctx)
complete_or_wait_on_out (splitmux, ctx);
if (splitmux->update_mux_start_time && ctx->is_reference) {
splitmux->mux_start_time = buf_info->run_ts;
splitmux->update_mux_start_time = FALSE;
if (request_next_keyframe (splitmux) == FALSE)
GST_WARNING_OBJECT (splitmux,
"Could not request a keyframe. Files may not split at the exact location they should");
}
if (splitmux->muxed_out_time == GST_CLOCK_STIME_NONE ||
splitmux->muxed_out_time < buf_info->run_ts)
splitmux->muxed_out_time = buf_info->run_ts;
splitmux->muxed_out_bytes += buf_info->buf_size;
splitmux->last_frame_duration = buf_info->duration;
#ifndef GST_DISABLE_GST_DEBUG
{
@ -858,9 +867,6 @@ start_next_fragment (GstSplitMuxSink * splitmux)
(splitmux->reference_ctx->in_running_time > splitmux->muxed_out_time);
/* Store the overflow parameters as the basis for the next fragment */
splitmux->mux_start_time = splitmux->muxed_out_time;
if (splitmux->last_frame_duration != GST_CLOCK_STIME_NONE)
splitmux->mux_start_time += splitmux->last_frame_duration;
splitmux->mux_start_bytes = splitmux->muxed_out_bytes;
GST_DEBUG_OBJECT (splitmux,
@ -868,9 +874,6 @@ start_next_fragment (GstSplitMuxSink * splitmux)
GST_STIME_ARGS (splitmux->max_out_running_time));
send_fragment_opened_closed_msg (splitmux, TRUE);
if (request_next_keyframe (splitmux) == FALSE)
GST_WARNING_OBJECT (splitmux,
"Could not request a keyframe. Files may not split at the exact location they should");
GST_SPLITMUX_BROADCAST (splitmux);
}
@ -967,6 +970,7 @@ handle_gathered_gop (GstSplitMuxSink * splitmux)
queued_time > splitmux->threshold_time)))) {
splitmux->state = SPLITMUX_STATE_ENDING_FILE;
splitmux->update_mux_start_time = TRUE;
GST_INFO_OBJECT (splitmux,
"mq overflowed since last, draining out. max out TS is %"
GST_STIME_FORMAT, GST_STIME_ARGS (splitmux->max_out_running_time));
@ -1749,7 +1753,7 @@ gst_splitmux_sink_change_state (GstElement * element, GstStateChange transition)
splitmux->state = SPLITMUX_STATE_COLLECTING_GOP_START;
splitmux->max_in_running_time = GST_CLOCK_STIME_NONE;
splitmux->muxed_out_time = splitmux->mux_start_time =
splitmux->last_frame_duration = GST_CLOCK_STIME_NONE;
GST_CLOCK_STIME_NONE;
splitmux->muxed_out_bytes = splitmux->mux_start_bytes = 0;
splitmux->opening_first_fragment = TRUE;
GST_SPLITMUX_UNLOCK (splitmux);

2
gst/multifile/gstsplitmuxsink.h
View file

@ -122,10 +122,10 @@ struct _GstSplitMuxSink {
GstClockTimeDiff muxed_out_time;
guint64 muxed_out_bytes;
gboolean have_muxed_something;
gboolean update_mux_start_time;
GstClockTimeDiff mux_start_time;
guint64 mux_start_bytes;
GstClockTime last_frame_duration;
gboolean opening_first_fragment;
gboolean switching_fragment;