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vpxenc: enforce strictly increasing pts

Browse source 
From vpx_codec_encode() documentation:
  "The presentation time stamp (PTS) MUST be strictly increasing."

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2405>
This commit is contained in:
Guillaume Desmottes 2022-05-11 16:20:42 +02:00
parent 10b837ae5e
commit aa3b6a11e0
2 changed files with 27 additions and 2 deletions
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26
subprojects/gst-plugins-good/ext/vpx/gstvpxenc.c
View file

@ -1611,6 +1611,10 @@ gst_vpx_enc_destroy_encoder (GstVPXEnc * encoder)
encoder->cfg.rc_twopass_stats_in.buf = NULL;
encoder->cfg.rc_twopass_stats_in.sz = 0;
}
encoder->last_pts = GST_CLOCK_TIME_NONE;
encoder->last_input_duration = GST_CLOCK_TIME_NONE;
g_mutex_unlock (&encoder->encoder_lock);
}
@ -1735,6 +1739,8 @@ gst_vpx_enc_set_format (GstVideoEncoder * video_encoder,
vpx_codec_destroy (&encoder->encoder);
encoder->inited = FALSE;
encoder->multipass_cache_idx++;
encoder->last_pts = GST_CLOCK_TIME_NONE;
encoder->last_input_duration = GST_CLOCK_TIME_NONE;
} else {
g_mutex_lock (&encoder->encoder_lock);
}
@ -2128,14 +2134,20 @@ gst_vpx_enc_drain (GstVideoEncoder * video_encoder)
vpx_codec_err_t status;
gint64 deadline;
vpx_codec_pts_t pts;
GstClockTime gst_pts = 0;
encoder = GST_VPX_ENC (video_encoder);
g_mutex_lock (&encoder->encoder_lock);
deadline = encoder->deadline;
if (GST_CLOCK_TIME_IS_VALID (encoder->last_pts))
gst_pts = encoder->last_pts;
if (GST_CLOCK_TIME_IS_VALID (encoder->last_input_duration))
gst_pts += encoder->last_input_duration;
pts =
gst_util_uint64_scale (encoder->last_pts,
gst_util_uint64_scale (gst_pts,
encoder->cfg.g_timebase.den,
encoder->cfg.g_timebase.num * (GstClockTime) GST_SECOND);
@ -2265,6 +2277,16 @@ gst_vpx_enc_handle_frame (GstVideoEncoder * video_encoder,
gst_segment_to_running_time (&video_encoder->input_segment,
GST_FORMAT_TIME, frame->pts);
/* vpx_codec_encode() enforces us to pass strictly increasing pts */
if (GST_CLOCK_TIME_IS_VALID (encoder->last_pts)
&& pts_rt <= encoder->last_pts) {
GST_WARNING_OBJECT (encoder,
"decreasing pts %" GST_TIME_FORMAT " previous buffer was %"
GST_TIME_FORMAT " enforce increasing pts", GST_TIME_ARGS (pts_rt),
GST_TIME_ARGS (encoder->last_pts));
pts_rt = encoder->last_pts + 1;
}
pts =
gst_util_uint64_scale (pts_rt,
encoder->cfg.g_timebase.den,
@ -2277,7 +2299,7 @@ gst_vpx_enc_handle_frame (GstVideoEncoder * video_encoder,
encoder->cfg.g_timebase.num * (GstClockTime) GST_SECOND);
if (duration > 0) {
encoder->last_pts += frame->duration;
encoder->last_input_duration = frame->duration;
} else {
/* We force the path ignoring the duration if we end up with a zero
* value for duration after scaling (e.g. duration value too small) */

3
subprojects/gst-plugins-good/ext/vpx/gstvpxenc.h
View file

@ -114,7 +114,10 @@ struct _GstVPXEnc
vpx_image_t image;
/* last input pts, in running time */
GstClockTime last_pts;
/* duration of the last input buffer */
GstClockTime last_input_duration;
GstVideoCodecState *input_state;
};