Re: [FFmpeg-devel] libavcodec: add timer bitstream filter [v2]
Hi Alexander, ‐‐‐ Original Message ‐‐‐ On Wednesday, 7 de August de 2019 10:01, Andreas Håkon wrote: > Hi Alexander, > > ‐‐‐ Original Message ‐‐‐ > On Wednesday, 7 de August de 2019 0:24, Alexander Strasser eclip...@gmx.net > wrote: > > > Hi Andreas! > > On 2019-08-05 17:25 +, Andreas Håkon wrote: > > > > > On Monday, 5 de August de 2019 17:31, Moritz Barsnick barsn...@gmx.net > > > wrote: > > > > [...] > > > > Sorry for the noise. IIRC the naming was previously discussed. > > Can't remember the details right now. Unfortunately I don't have > > any good name suggestions too :( > > This is no objections, but at least to me the name timer sounds > > like some autonomous unit/process that can interrupt/call your > > process on defined/configured/subscribed intervals. Maybe it's > > just me... > > ...what do others think? > > It's nitial name was "retimer". After a suggestion I changed to "timer". > Other options can be "timestamp", "synchronizer", etc. > However, they're all a little vague. > > Therefore, I ask someone to present an appropriate name taking > into account the objective: shifting the PTS/DTS marks of a stream. > > You like "timeshift"? Check new version: https://patchwork.ffmpeg.org/patch/14302/ Regards. A.H. --- ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-devel] libavcodec: add timer bitstream filter [v2]
Hi Alexander,
‐‐‐ Original Message ‐‐‐
On Wednesday, 7 de August de 2019 0:24, Alexander Strasser
wrote:
> Hi Andreas!
>
> On 2019-08-05 17:25 +, Andreas Håkon wrote:
>
> > On Monday, 5 de August de 2019 17:31, Moritz Barsnick barsn...@gmx.net
> > wrote:
>
> [...]
>
> > > > +static const AVClass timer_class = {
> > > >
> > > > - .class_name = "timer",
> > >
> > > In about half of the existing BSFs, this would be called "timer_bsf". I
> > > don't care, I just look at other existing code. ;-)
> >
> > Good point! Other bitstream filters have this. I'll update it.
> > Thank you!
>
> Sorry for the noise. IIRC the naming was previously discussed.
> Can't remember the details right now. Unfortunately I don't have
> any good name suggestions too :(
>
> This is no objections, but at least to me the name timer sounds
> like some autonomous unit/process that can interrupt/call your
> process on defined/configured/subscribed intervals. Maybe it's
> just me...
>
> ...what do others think?
It's nitial name was "retimer". After a suggestion I changed to "timer".
Other options can be "timestamp", "synchronizer", etc.
However, they're all a little vague.
Therefore, I ask someone to present an appropriate name taking
into account the objective: shifting the PTS/DTS marks of a stream.
You like "timeshift"?
Regards.
A.H.
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Re: [FFmpeg-devel] libavcodec: add timer bitstream filter [v2]
Hi Andreas!
On 2019-08-05 17:25 +, Andreas Håkon wrote:
> On Monday, 5 de August de 2019 17:31, Moritz Barsnick
> wrote:
>
[...]
> > > +static const AVClass timer_class = {
> > > + .class_name = "timer",
> >
> > In about half of the existing BSFs, this would be called "timer_bsf". I
> > don't care, I just look at other existing code. ;-)
> >
>
> Good point! Other bitstream filters have this. I'll update it.
> Thank you!
Sorry for the noise. IIRC the naming was previously discussed.
Can't remember the details right now. Unfortunately I don't have
any good name suggestions too :(
This is no objections, but at least to me the name timer sounds
like some autonomous unit/process that can interrupt/call your
process on defined/configured/subscribed intervals. Maybe it's
just me...
...what do others think?
Alexander
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Re: [FFmpeg-devel] libavcodec: add timer bitstream filter [v2]
Hi Moritz,
‐‐‐ Original Message ‐‐‐
On Monday, 5 de August de 2019 17:31, Moritz Barsnick wrote:
> Hi Andreas,
>
> While trying to figure out how to add features I'd like to see into
> this ;-), some remarks:
>
> > +Apply an offset to the PTS/DTS timestamps.
> > +
> > +@table @option
> > +@item offset
> > +The offset value to apply to the PTS/DTS timestamps.
>
> For the unknowing, it might be useful to point out what sort of
> increments this is (i.e. not an actual "time" stamp or seconds).
The value are native PTS/DTS ticks, so a resolution of 90kHz.
So, you agree with something like this?
@item offset
"The absolute offset value to apply to the PTS/DTS timestamps
with a 90kHz resolution."
> [...]
> > + { "offset", NULL, OFFSET(offset), AV_OPT_TYPE_INT, { .i64 = 0 },
> > INT_MIN, INT_MAX, FLAGS },
>
> Considering PTS/DTS is int64, wouldn't it be useful for the offset also
> being int64 (and using limits INT64_MIN, INT64_MAX)?
Aah, I feel you like then to full cover all the possible values.
Then two changes are required:
1. Use int64 types.
2. Limit offset values from -((2^33)-1) to +((2^33)-1)
You agree with this?
> > +// TODO: Instead of using absolute timestamp offsets, use frame numbers
>
> Alternatively? Or perhaps also AV_OPT_TYPE_DURATION? TODO is for later,
> anyway...
Perhaps I'll remove the TODO comments. The reason to appear is because some
other developers in the mailing-list have pointed some interesting ideas for
this plugin in the future. I'm not sure to remove it or not.
> > + if (!s->first_debug_done) {
> > + av_log(ctx, AV_LOG_DEBUG, "Updated PTS/DTS (%"PRId64"/%"PRId64"
> > : %"PRId64"/%"PRId64") with offset:%d\\n",
> > + pkt->pts, pkt->dts, opts, odts, s->offset );
> > + }
> > + s->first_debug_done = 1;
>
> You should set the variable inside the if() block. otherwise it gets
> assigned on every packet.
Yes, a small optimization.
> > +static const AVClass timer_class = {
> > + .class_name = "timer",
>
> In about half of the existing BSFs, this would be called "timer_bsf". I
> don't care, I just look at other existing code. ;-)
>
Good point! Other bitstream filters have this. I'll update it.
Thank you!
Regards.
A.H.
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Re: [FFmpeg-devel] libavcodec: add timer bitstream filter [v2]
Hi Andreas,
On Fri, Aug 02, 2019 at 13:03:03 +, Andreas Håkon wrote:
While trying to figure out how to add features I'd like to see into
this ;-), some remarks:
> +Apply an offset to the PTS/DTS timestamps.
> +
> +@table @option
> +@item offset
> +The offset value to apply to the PTS/DTS timestamps.
For the unknowing, it might be useful to point out what sort of
increments this is (i.e. not an actual "time" stamp or seconds).
> +// TODO: Control time wrapping
[...]
> +int offset;
[...]
> +{ "offset", NULL, OFFSET(offset), AV_OPT_TYPE_INT, { .i64 = 0 },
> INT_MIN, INT_MAX, FLAGS },
Considering PTS/DTS is int64, wouldn't it be useful for the offset also
being int64 (and using limits INT64_MIN, INT64_MAX)?
> +// TODO: Instead of using absolute timestamp offsets, use frame numbers
Alternatively? Or perhaps also AV_OPT_TYPE_DURATION? TODO is for later,
anyway...
> +if (!s->first_debug_done) {
> +av_log(ctx, AV_LOG_DEBUG, "Updated PTS/DTS (%"PRId64"/%"PRId64" :
> %"PRId64"/%"PRId64") with offset:%d\n",
> +pkt->pts, pkt->dts, opts, odts, s->offset );
> +}
> +s->first_debug_done = 1;
You should set the variable inside the if() block. otherwise it gets
assigned on every packet.
> +static const AVClass timer_class = {
> +.class_name = "timer",
In about half of the existing BSFs, this would be called "timer_bsf". I
don't care, I just look at other existing code. ;-)
Cheers,
Moritz
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Re: [FFmpeg-devel] libavcodec: add timer bitstream filter
Hi Paul, ‐‐‐ Original Message ‐‐‐ On Monday, 29 de July de 2019 21:19, Paul B Mahol wrote: > Documentation for bsf does document single option, thus is incomplete. Done: https://patchwork.ffmpeg.org/patch/14195/ Regards. A.H. --- ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-devel] libavcodec: add timer bitstream filter [v2]
Hi,
This new version completes the documentation.
Supersedes: https://patchwork.ffmpeg.org/patch/13743/
Regards.
A.H.
---From 9d115c9c049c5a1141ea83174794bf773359ebd0 Mon Sep 17 00:00:00 2001
From: Andreas Hakon
Date: Fri, 2 Aug 2019 13:55:48 +0100
Subject: [PATCH] libavcodec: add timer bitstream filter [v2]
This implements the new timer bitstream filter.
Signed-off-by: Andreas Hakon
---
doc/bitstream_filters.texi | 10 +
libavcodec/Makefile|1 +
libavcodec/bitstream_filters.c |1 +
libavcodec/timer_bsf.c | 86
4 files changed, 98 insertions(+)
create mode 100644 libavcodec/timer_bsf.c
diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi
index 50a1679..2d92eeb 100644
--- a/doc/bitstream_filters.texi
+++ b/doc/bitstream_filters.texi
@@ -644,6 +644,16 @@ codec) with metadata headers.
See also the @ref{mov2textsub} filter.
+@section timer
+
+Apply an offset to the PTS/DTS timestamps.
+
+@table @option
+@item offset
+The offset value to apply to the PTS/DTS timestamps.
+
+@end table
+
@section trace_headers
Log trace output containing all syntax elements in the coded stream
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index 3cd73fb..2c2f018 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1096,6 +1096,7 @@ OBJS-$(CONFIG_NULL_BSF) += null_bsf.o
OBJS-$(CONFIG_PRORES_METADATA_BSF)+= prores_metadata_bsf.o
OBJS-$(CONFIG_REMOVE_EXTRADATA_BSF) += remove_extradata_bsf.o
OBJS-$(CONFIG_TEXT2MOVSUB_BSF)+= movsub_bsf.o
+OBJS-$(CONFIG_TIMER_BSF) += timer_bsf.o
OBJS-$(CONFIG_TRACE_HEADERS_BSF) += trace_headers_bsf.o
OBJS-$(CONFIG_TRUEHD_CORE_BSF)+= truehd_core_bsf.o mlp_parse.o
mlp.o
OBJS-$(CONFIG_VP9_METADATA_BSF) += vp9_metadata_bsf.o
diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c
index 4630039..be6af05 100644
--- a/libavcodec/bitstream_filters.c
+++ b/libavcodec/bitstream_filters.c
@@ -51,6 +51,7 @@ extern const AVBitStreamFilter ff_null_bsf;
extern const AVBitStreamFilter ff_prores_metadata_bsf;
extern const AVBitStreamFilter ff_remove_extradata_bsf;
extern const AVBitStreamFilter ff_text2movsub_bsf;
+extern const AVBitStreamFilter ff_timer_bsf;
extern const AVBitStreamFilter ff_trace_headers_bsf;
extern const AVBitStreamFilter ff_truehd_core_bsf;
extern const AVBitStreamFilter ff_vp9_metadata_bsf;
diff --git a/libavcodec/timer_bsf.c b/libavcodec/timer_bsf.c
new file mode 100644
index 000..3f1c7f6
--- /dev/null
+++ b/libavcodec/timer_bsf.c
@@ -0,0 +1,86 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * This bitstream filter applies an offset to the PTS/DTS timestamps.
+ *
+ */
+
+// TODO: Control time wrapping
+// TODO: Instead of using absolute timestamp offsets, use frame numbers
+
+#include "avcodec.h"
+#include "bsf.h"
+
+#include "libavutil/opt.h"
+
+typedef struct TimerContext {
+const AVClass *class;
+int offset;
+int first_debug_done;
+} TimerContext;
+
+static int timer_filter(AVBSFContext *ctx, AVPacket *pkt)
+{
+int ret;
+TimerContext *s = ctx->priv_data;
+int64_t opts,odts;
+
+ret = ff_bsf_get_packet_ref(ctx, pkt);
+if (ret < 0)
+return ret;
+
+opts = pkt->pts;
+if (pkt->pts != AV_NOPTS_VALUE) {
+pkt->pts += s->offset;
+}
+odts = pkt->dts;
+if (pkt->dts != AV_NOPTS_VALUE) {
+pkt->dts += s->offset;
+}
+
+if (!s->first_debug_done) {
+av_log(ctx, AV_LOG_DEBUG, "Updated PTS/DTS (%"PRId64"/%"PRId64" :
%"PRId64"/%"PRId64") with offset:%d\n",
+pkt->pts, pkt->dts, opts, odts, s->offset );
+}
+s->first_debug_done = 1;
+
+return 0;
+}
+
+#define OFFSET(x) offsetof(TimerContext, x)
+#define FLAGS
(AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_BSF_PARAM)
+static const AVOption options[] = {
+{ "offset", NULL, OFFSET(offset), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN,
INT_MAX, FLAGS },
+{ NULL },
+};
+
+static const AVClass timer_class = {
+.class_name = "timer",
+.item_name = av_default_item_name,
+.option = options,
+
Re: [FFmpeg-devel] libavcodec: add timer bitstream filter
Documentation for bsf does document single option, thus is incomplete. On Mon, Jul 29, 2019 at 9:14 PM Andreas Håkon wrote: > Ping > > ‐‐‐ Original Message ‐‐‐ > On Wednesday, 24 de July de 2019 9:16, Andreas Håkon < > andreas.ha...@protonmail.com> wrote: > > > Hi, > > > > ‐‐‐ Original Message ‐‐‐ > > On Friday, 28 de June de 2019 10:44, Andreas Håkon < > andreas.ha...@protonmail.com> wrote: > > > >> Hi, > >> This is a refined version of the initial version for the new “timer” > BSF. > >> Supersedes: https://patchwork.ffmpeg.org/patch/13699/ > > > > Still waiting to receive comments (or acceptance). > > > > Regards. > > A.H. > > > > --- > ___ > ffmpeg-devel mailing list > ffmpeg-devel@ffmpeg.org > https://ffmpeg.org/mailman/listinfo/ffmpeg-devel > > To unsubscribe, visit link above, or email > ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe". ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-devel] libavcodec: add timer bitstream filter
Ping ‐‐‐ Original Message ‐‐‐ On Wednesday, 24 de July de 2019 9:16, Andreas Håkon wrote: > Hi, > > ‐‐‐ Original Message ‐‐‐ > On Friday, 28 de June de 2019 10:44, Andreas Håkon > wrote: > >> Hi, >> This is a refined version of the initial version for the new “timer” BSF. >> Supersedes: https://patchwork.ffmpeg.org/patch/13699/ > > Still waiting to receive comments (or acceptance). > > Regards. > A.H. > > --- ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-devel] libavcodec: add timer bitstream filter
Hi, ‐‐‐ Original Message ‐‐‐ On Friday, 28 de June de 2019 10:44, Andreas Håkon wrote: > Hi, > This is a refined version of the initial version for the new “timer” BSF. > Supersedes: https://patchwork.ffmpeg.org/patch/13699/ Still waiting to receive comments (or acceptance). Regards. A.H. --- ___ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-devel] libavcodec: add timer bitstream filter
Hi,
This is a refined version of the initial version for the new “timer” BSF.
Supersedes: https://patchwork.ffmpeg.org/patch/13699/
Changes from the last version:
1. Name changed from “delayer” to “timer”.
2. Enabled negative offset values (aka time advance).
3. Improved less verbose log functionality.
It will be updated in the future with more parameters. However, the idea is to
add it first as is.
Regards.
A.H.
---From db0f73bde33cfb52361d9905f16cd7ad773ece3d Mon Sep 17 00:00:00 2001
From: Andreas Hakon
Date: Fri, 28 Jun 2019 09:38:54 +0100
Subject: [PATCH] libavcodec: add timer bitstream filter
This implements the new timer bitstream filter.
Signed-off-by: Andreas Hakon
---
doc/bitstream_filters.texi |4 ++
libavcodec/Makefile|1 +
libavcodec/bitstream_filters.c |1 +
libavcodec/timer_bsf.c | 86
4 files changed, 92 insertions(+)
create mode 100644 libavcodec/timer_bsf.c
diff --git a/doc/bitstream_filters.texi b/doc/bitstream_filters.texi
index 40e8ada..777f4b6 100644
--- a/doc/bitstream_filters.texi
+++ b/doc/bitstream_filters.texi
@@ -629,6 +629,10 @@ codec) with metadata headers.
See also the @ref{mov2textsub} filter.
+@section timer
+
+Apply an offset to the PTS/DTS timestamps.
+
@section trace_headers
Log trace output containing all syntax elements in the coded stream
diff --git a/libavcodec/Makefile b/libavcodec/Makefile
index edccd73..0f2770a 100644
--- a/libavcodec/Makefile
+++ b/libavcodec/Makefile
@@ -1096,6 +1096,7 @@ OBJS-$(CONFIG_NULL_BSF) += null_bsf.o
OBJS-$(CONFIG_PRORES_METADATA_BSF)+= prores_metadata_bsf.o
OBJS-$(CONFIG_REMOVE_EXTRADATA_BSF) += remove_extradata_bsf.o
OBJS-$(CONFIG_TEXT2MOVSUB_BSF)+= movsub_bsf.o
+OBJS-$(CONFIG_TIMER_BSF) += timer_bsf.o
OBJS-$(CONFIG_TRACE_HEADERS_BSF) += trace_headers_bsf.o
OBJS-$(CONFIG_TRUEHD_CORE_BSF)+= truehd_core_bsf.o mlp_parse.o
mlp.o
OBJS-$(CONFIG_VP9_METADATA_BSF) += vp9_metadata_bsf.o
diff --git a/libavcodec/bitstream_filters.c b/libavcodec/bitstream_filters.c
index 4630039..be6af05 100644
--- a/libavcodec/bitstream_filters.c
+++ b/libavcodec/bitstream_filters.c
@@ -51,6 +51,7 @@ extern const AVBitStreamFilter ff_null_bsf;
extern const AVBitStreamFilter ff_prores_metadata_bsf;
extern const AVBitStreamFilter ff_remove_extradata_bsf;
extern const AVBitStreamFilter ff_text2movsub_bsf;
+extern const AVBitStreamFilter ff_timer_bsf;
extern const AVBitStreamFilter ff_trace_headers_bsf;
extern const AVBitStreamFilter ff_truehd_core_bsf;
extern const AVBitStreamFilter ff_vp9_metadata_bsf;
diff --git a/libavcodec/timer_bsf.c b/libavcodec/timer_bsf.c
new file mode 100644
index 000..3f1c7f6
--- /dev/null
+++ b/libavcodec/timer_bsf.c
@@ -0,0 +1,86 @@
+/*
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * This bitstream filter applies an offset to the PTS/DTS timestamps.
+ *
+ */
+
+// TODO: Control time wrapping
+// TODO: Instead of using absolute timestamp offsets, use frame numbers
+
+#include "avcodec.h"
+#include "bsf.h"
+
+#include "libavutil/opt.h"
+
+typedef struct TimerContext {
+const AVClass *class;
+int offset;
+int first_debug_done;
+} TimerContext;
+
+static int timer_filter(AVBSFContext *ctx, AVPacket *pkt)
+{
+int ret;
+TimerContext *s = ctx->priv_data;
+int64_t opts,odts;
+
+ret = ff_bsf_get_packet_ref(ctx, pkt);
+if (ret < 0)
+return ret;
+
+opts = pkt->pts;
+if (pkt->pts != AV_NOPTS_VALUE) {
+pkt->pts += s->offset;
+}
+odts = pkt->dts;
+if (pkt->dts != AV_NOPTS_VALUE) {
+pkt->dts += s->offset;
+}
+
+if (!s->first_debug_done) {
+av_log(ctx, AV_LOG_DEBUG, "Updated PTS/DTS (%"PRId64"/%"PRId64" :
%"PRId64"/%"PRId64") with offset:%d\n",
+pkt->pts, pkt->dts, opts, odts, s->offset );
+}
+s->first_debug_done = 1;
+
+return 0;
+}
+
+#define OFFSET(x) offsetof(TimerContext, x)
+#define FLAGS
(AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_AUDIO_PARAM|AV_OPT_FLAG_SUBTITLE_PARAM|AV_OPT_FLAG_BSF_PARAM)
+static const AVOption options[] = {
+{ "offset", NULL, OFFSET(offset), AV_OPT_TYPE_INT, { .i64
