[FFmpeg-cvslog] avformat/matroskaenc: Improve Cues in case of no video
Andreas Rheinhardt
git at videolan.org
Tue Apr 21 08:22:37 EEST 2020
ffmpeg | branch: master | Andreas Rheinhardt <andreas.rheinhardt at gmail.com> | Sun Dec 29 03:14:53 2019 +0100| [945b92873061c66b82df892887cd9baf8146857b] | committer: Andreas Rheinhardt
avformat/matroskaenc: Improve Cues in case of no video
The Matroska muxer currently only adds CuePoints in three cases:
a) For video keyframes. b) For the first audio frame in a new Cluster if
in DASH-mode. c) For subtitles. This means that ordinary Matroska audio
files won't have any Cues which impedes seeking.
This commit changes this. For every track in a file without video track
it is checked and tracked whether a Cue entry has already been added
for said track for the current Cluster. This is used to add a Cue entry
for each first packet of each track in each Cluster.
Implements #3149.
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt at gmail.com>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=945b92873061c66b82df892887cd9baf8146857b
---
libavformat/matroskaenc.c | 21 ++++++++++++---------
tests/ref/fate/aac-autobsf-adtstoasc | 4 ++--
tests/ref/fate/matroska-flac-extradata-update | 4 ++--
tests/ref/lavf/mka | 4 ++--
4 files changed, 18 insertions(+), 15 deletions(-)
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index 116b89fb4d..a65221e143 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -2123,6 +2123,10 @@ static void mkv_end_cluster(AVFormatContext *s)
MatroskaMuxContext *mkv = s->priv_data;
end_ebml_master_crc32(s->pb, &mkv->cluster_bc, mkv, MATROSKA_ID_CLUSTER, 0, 1);
+ if (!mkv->have_video) {
+ for (unsigned i = 0; i < s->nb_streams; i++)
+ mkv->tracks[i].has_cue = 0;
+ }
mkv->cluster_pos = -1;
avio_write_marker(s->pb, AV_NOPTS_VALUE, AVIO_DATA_MARKER_FLUSH_POINT);
}
@@ -2225,7 +2229,7 @@ static int mkv_check_new_extra_data(AVFormatContext *s, AVPacket *pkt)
return 0;
}
-static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_cue)
+static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt)
{
MatroskaMuxContext *mkv = s->priv_data;
AVIOContext *pb;
@@ -2271,10 +2275,12 @@ static int mkv_write_packet_internal(AVFormatContext *s, AVPacket *pkt, int add_
ret = mkv_write_block(s, pb, MATROSKA_ID_SIMPLEBLOCK, pkt, keyframe);
if (ret < 0)
return ret;
- if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && (par->codec_type == AVMEDIA_TYPE_VIDEO && keyframe || add_cue)) {
+ if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && keyframe &&
+ (par->codec_type == AVMEDIA_TYPE_VIDEO || !mkv->have_video && !track->has_cue)) {
ret = mkv_add_cuepoint(mkv, pkt->stream_index, ts,
mkv->cluster_pos, relative_packet_pos, -1);
if (ret < 0) return ret;
+ track->has_cue = 1;
}
} else {
if (par->codec_id == AV_CODEC_ID_WEBVTT) {
@@ -2340,8 +2346,7 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
// on seeing key frames.
start_new_cluster = keyframe;
} else if (mkv->is_dash && codec_type == AVMEDIA_TYPE_AUDIO &&
- (mkv->cluster_pos == -1 ||
- cluster_time > mkv->cluster_time_limit)) {
+ cluster_time > mkv->cluster_time_limit) {
// For DASH audio, we create a Cluster based on cluster_time_limit
start_new_cluster = 1;
} else if (!mkv->is_dash &&
@@ -2365,9 +2370,7 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
// check if we have an audio packet cached
if (mkv->cur_audio_pkt.size > 0) {
- // for DASH audio, a CuePoint has to be added when there is a new cluster.
- ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt,
- mkv->is_dash ? start_new_cluster : 0);
+ ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
av_packet_unref(&mkv->cur_audio_pkt);
if (ret < 0) {
av_log(s, AV_LOG_ERROR,
@@ -2382,7 +2385,7 @@ static int mkv_write_packet(AVFormatContext *s, AVPacket *pkt)
if (pkt->size > 0)
ret = av_packet_ref(&mkv->cur_audio_pkt, pkt);
} else
- ret = mkv_write_packet_internal(s, pkt, 0);
+ ret = mkv_write_packet_internal(s, pkt);
return ret;
}
@@ -2410,7 +2413,7 @@ static int mkv_write_trailer(AVFormatContext *s)
// check if we have an audio packet cached
if (mkv->cur_audio_pkt.size > 0) {
- ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt, 0);
+ ret = mkv_write_packet_internal(s, &mkv->cur_audio_pkt);
if (ret < 0) {
av_log(s, AV_LOG_ERROR,
"Could not write cached audio packet ret:%d\n", ret);
diff --git a/tests/ref/fate/aac-autobsf-adtstoasc b/tests/ref/fate/aac-autobsf-adtstoasc
index f1c6f889d4..d9191fb37f 100644
--- a/tests/ref/fate/aac-autobsf-adtstoasc
+++ b/tests/ref/fate/aac-autobsf-adtstoasc
@@ -1,5 +1,5 @@
-9d0c81ce285a84c0137316004d091d95 *tests/data/fate/aac-autobsf-adtstoasc.matroska
-6620 tests/data/fate/aac-autobsf-adtstoasc.matroska
+76a14cc1b3292c7f724006d56b7e2eac *tests/data/fate/aac-autobsf-adtstoasc.matroska
+6648 tests/data/fate/aac-autobsf-adtstoasc.matroska
#extradata 0: 2, 0x0030001c
#tb 0: 1/1000
#media_type 0: audio
diff --git a/tests/ref/fate/matroska-flac-extradata-update b/tests/ref/fate/matroska-flac-extradata-update
index dfb2851b0f..16b268c4a8 100644
--- a/tests/ref/fate/matroska-flac-extradata-update
+++ b/tests/ref/fate/matroska-flac-extradata-update
@@ -1,5 +1,5 @@
-83aca2772c52f6f802cac288f889382b *tests/data/fate/matroska-flac-extradata-update.matroska
-2019 tests/data/fate/matroska-flac-extradata-update.matroska
+5f6a67a45906f1bc7dd11d840470b0e4 *tests/data/fate/matroska-flac-extradata-update.matroska
+2071 tests/data/fate/matroska-flac-extradata-update.matroska
#extradata 0: 34, 0x7acb09e7
#extradata 1: 34, 0x7acb09e7
#extradata 2: 34, 0x443402dd
diff --git a/tests/ref/lavf/mka b/tests/ref/lavf/mka
index b3c4117d92..24ccef51fd 100644
--- a/tests/ref/lavf/mka
+++ b/tests/ref/lavf/mka
@@ -1,3 +1,3 @@
-0d48d93057f14704f6b839bb15e7328a *tests/data/lavf/lavf.mka
-43552 tests/data/lavf/lavf.mka
+df7155d4333e9993c9ea2a9d53868881 *tests/data/lavf/lavf.mka
+43580 tests/data/lavf/lavf.mka
tests/data/lavf/lavf.mka CRC=0x3a1da17e
More information about the ffmpeg-cvslog
mailing list