diff options
Diffstat (limited to 'fftools/ffmpeg.c')
| -rw-r--r-- | fftools/ffmpeg.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/fftools/ffmpeg.c b/fftools/ffmpeg.c index e5fbd479a8..aaaf241314 100644 --- a/fftools/ffmpeg.c +++ b/fftools/ffmpeg.c @@ -237,7 +237,7 @@ static void sub2video_push_ref(InputStream *ist, int64_t pts) } } -void sub2video_update(InputStream *ist, AVSubtitle *sub) +void sub2video_update(InputStream *ist, int64_t heartbeat_pts, AVSubtitle *sub) { AVFrame *frame = ist->sub2video.frame; int8_t *dst; @@ -254,7 +254,12 @@ void sub2video_update(InputStream *ist, AVSubtitle *sub) AV_TIME_BASE_Q, ist->st->time_base); num_rects = sub->num_rects; } else { - pts = ist->sub2video.end_pts; + /* If we are initializing the system, utilize current heartbeat + PTS as the start time, and show until the following subpicture + is received. Otherwise, utilize the previous subpicture's end time + as the fall-back value. */ + pts = ist->sub2video.initialize ? + heartbeat_pts : ist->sub2video.end_pts; end_pts = INT64_MAX; num_rects = 0; } @@ -269,6 +274,7 @@ void sub2video_update(InputStream *ist, AVSubtitle *sub) sub2video_copy_rect(dst, dst_linesize, frame->width, frame->height, sub->rects[i]); sub2video_push_ref(ist, pts); ist->sub2video.end_pts = end_pts; + ist->sub2video.initialize = 0; } static void sub2video_heartbeat(InputStream *ist, int64_t pts) @@ -291,9 +297,11 @@ static void sub2video_heartbeat(InputStream *ist, int64_t pts) /* do not send the heartbeat frame if the subtitle is already ahead */ if (pts2 <= ist2->sub2video.last_pts) continue; - if (pts2 >= ist2->sub2video.end_pts || - (!ist2->sub2video.frame->data[0] && ist2->sub2video.end_pts < INT64_MAX)) - sub2video_update(ist2, NULL); + if (pts2 >= ist2->sub2video.end_pts || ist2->sub2video.initialize) + /* if we have hit the end of the current displayed subpicture, + or if we need to initialize the system, update the + overlayed subpicture and its start/end times */ + sub2video_update(ist2, pts2 + 1, NULL); for (j = 0, nb_reqs = 0; j < ist2->nb_filters; j++) nb_reqs += av_buffersrc_get_nb_failed_requests(ist2->filters[j]->filter); if (nb_reqs) @@ -307,7 +315,7 @@ static void sub2video_flush(InputStream *ist) int ret; if (ist->sub2video.end_pts < INT64_MAX) - sub2video_update(ist, NULL); + sub2video_update(ist, INT64_MAX, NULL); for (i = 0; i < ist->nb_filters; i++) { ret = av_buffersrc_add_frame(ist->filters[i]->filter, NULL); if (ret != AVERROR_EOF && ret < 0) @@ -2507,7 +2515,7 @@ static int transcode_subtitles(InputStream *ist, AVPacket *pkt, int *got_output, return ret; if (ist->sub2video.frame) { - sub2video_update(ist, &subtitle); + sub2video_update(ist, INT64_MIN, &subtitle); } else if (ist->nb_filters) { if (!ist->sub2video.sub_queue) ist->sub2video.sub_queue = av_fifo_alloc(8 * sizeof(AVSubtitle)); |