On Thu, 30 Nov 2017, John Stebbins wrote:
---
fftools/ffplay.c | 21 ++++++++++++++++-----
1 file changed, 16 insertions(+), 5 deletions(-)
diff --git a/fftools/ffplay.c b/fftools/ffplay.c
index 10a917194d..152d220cdb 100644
--- a/fftools/ffplay.c
+++ b/fftools/ffplay.c
@@ -198,6 +198,8 @@ typedef struct Decoder {
int64_t next_pts;
AVRational next_pts_tb;
SDL_Thread *decoder_tid;
+ int drop_disposable;
+ int frame_drops_disposable;
} Decoder;
typedef struct VideoState {
@@ -660,10 +662,16 @@ static int decoder_decode_frame(Decoder *d, AVFrame
*frame, AVSubtitle *sub) {
ret = got_frame ? 0 : (pkt.data ? AVERROR(EAGAIN) :
AVERROR_EOF);
}
} else {
- if (avcodec_send_packet(d->avctx, &pkt) == AVERROR(EAGAIN)) {
- av_log(d->avctx, AV_LOG_ERROR, "Receive_frame and send_packet
both returned EAGAIN, which is an API violation.\n");
- d->packet_pending = 1;
- av_packet_move_ref(&d->pkt, &pkt);
+ if (d->avctx->codec_type == AVMEDIA_TYPE_VIDEO &&
+ d->drop_disposable &&
+ (pkt.flags & AV_PKT_FLAG_DISPOSABLE)) {
+ d->frame_drops_disposable++;
+ } else {
+ if (avcodec_send_packet(d->avctx, &pkt) ==
AVERROR(EAGAIN)) {
+ av_log(d->avctx, AV_LOG_ERROR, "Receive_frame and
send_packet both returned EAGAIN, which is an API violation.\n");
+ d->packet_pending = 1;
+ av_packet_move_ref(&d->pkt, &pkt);
+ }
}
}
av_packet_unref(&pkt);
@@ -1622,6 +1630,7 @@ retry:
frame_queue_next(&is->pictq);
goto retry;
}
+ is->viddec.drop_disposable = 0;
}
if (is->subtitle_st) {
@@ -1699,7 +1708,8 @@ display:
get_master_clock(is),
(is->audio_st && is->video_st) ? "A-V" : (is->video_st ? "M-V" : (is->audio_st ?
"M-A" : " ")),
av_diff,
- is->frame_drops_early + is->frame_drops_late,
+ is->frame_drops_early + is->frame_drops_late +
+ is->viddec.frame_drops_disposable,
aqsize / 1024,
vqsize / 1024,
sqsize,
@@ -1767,6 +1777,7 @@ static int get_video_frame(VideoState *is, AVFrame *frame)
is->frame_drops_early++;
av_frame_unref(frame);
got_picture = 0;
+ is->viddec.drop_disposable = 1;
}
}
}
The patch looks OK now, but as I mentioned earlier, please do not enable
this kind of frame dropping by default, either introduce a separate option
"hardframedrop", or make -framedrop an integer and use "2" for this kind
of hard dropping.
Regards,
Marton
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