[FFmpeg-devel] Test case for Closed caption decoder.
Michael Niedermayer
michaelni at gmx.at
Mon May 4 17:20:15 CEST 2015
On Mon, May 04, 2015 at 05:30:05PM +0530, Anshul wrote:
>
>
> On 05/04/2015 05:27 PM, Anshul wrote:
> >
> >
> >On 05/04/2015 03:09 AM, Michael Niedermayer wrote:
> >>On Sun, May 03, 2015 at 08:53:14PM +0200, Clément Bœsch wrote:
> >>>On Sun, May 03, 2015 at 06:46:15PM +0530, Anshul wrote:
> >>>>
> >>>>On 05/02/2015 08:24 PM, Clément Bœsch wrote:
> >>>>>On Tue, Apr 28, 2015 at 07:50:15PM +0530, Anshul wrote:
> >>>>>>On 04/28/2015 02:14 PM, Clément Bœsch wrote:
> >>>>>>>Then FATE test patch should be applied after the CC patch.
> >>>>>>>
> >>>>>>New patch attached. I have used other ass api.
> >>>>>>>>+fate-sub-cc: CMD = fmtstdout ass -f lavfi -i "movie=$(TARGET_SAMPLES)/sub/Closedcaption_atsc_rollup.ts[out0+subcc]"
> >>>>>>>>
> >>>>>>>BTW, do we really need to go through libavfilter to extract the cc?
> >>>>>>Yes, there is no other way then libavfilter that I know.
> >>>>>>Closed caption was
> >>>>>>possible only after nicolas patch.
> >>>>>>if you want more details, Why libavfilter was chosen,
> >>>>>>you might need to read
> >>>>>>last year's mail chain.
> >>>>>>there has been long debate on it. so I don't want to
> >>>>>>indulge myself again in
> >>>>>>it.
> >>>>>>>>+
> >>>>>>>> FATE_SUBTITLES_ASS-$(call DEMDEC, JACOSUB,
> >>>>>>>>JACOSUB) += fate-sub-jacosub
> >>>>>>>> fate-sub-jacosub: CMD = fmtstdout ass -i
> >>>>>>>>$(TARGET_SAMPLES)/sub/JACOsub_capability_tester.jss
> >>>>>>>>diff --git a/tests/ref/fate/sub-cc b/tests/ref/fate/sub-cc
> >>>>>>>>new file mode 100644
> >>>>>>>>index 0000000..035a51a
> >>>>>>>>--- /dev/null
> >>>>>>>>+++ b/tests/ref/fate/sub-cc
> >>>>>>>>@@ -0,0 +1,38 @@
> >>>>>>>>+[Script Info]
> >>>>>>>>+; Script generated by FFmpeg/Lavc
> >>>>>>>>+ScriptType: v4.00+
> >>>>>>>>+PlayResX: 384
> >>>>>>>>+PlayResY: 288
> >>>>>>>>+
> >>>>>>>>+[V4+ Styles]
> >>>>>>>>+Format: Name, Fontname, Fontsize, PrimaryColour,
> >>>>>>>>SecondaryColour, OutlineColour, BackColour, Bold,
> >>>>>>>>Italic, Underline, StrikeOut, ScaleX, ScaleY,
> >>>>>>>>Spacing, Angle, BorderStyle, Outline, Shadow,
> >>>>>>>>Alignment, MarginL, MarginR, MarginV, Encoding
> >>>>>>>>+Style: Default,Arial,16,&Hffffff,&Hffffff,&H0,&H0,0,0,0,0,100,100,0,0,1,1,0,2,10,10,10,0
> >>>>>>>>+
> >>>>>>>>+[Events]
> >>>>>>>>+Format: Layer, Start, End, Style, Name, MarginL,
> >>>>>>>>MarginR, MarginV, Effect, Text
> >>>>>>>>+Dialogue: 0,0:00:36.87,0:00:38.37,Default,,0,0,0,,( explosion )
> >>>>>>>>+Dialogue: 0,0:00:38.37,0:00:40.51,Default,,0,0,0,,(
> >>>>>>>>explosion )\N( inaudible radio chatter )
> >>>>>>>>+Dialogue: 0,0:00:40.51,0:00:41.88,Default,,0,0,0,,(
> >>>>>>>>inaudible radio chatter )\N>> Safety remains our
> >>>>>>>>number one
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:41.88,0:00:43.34,Default,,0,0,0,,>> Safety
> >>>>>>>>remains our number one\Npriority.
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:43.34,0:00:44.51,Default,,0,0,0,,priority.\N>>
> >>>>>>>>BP can talk about safety all
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:44.51,0:00:45.88,Default,,0,0,0,,>> BP can
> >>>>>>>>talk about safety all\Nthey want, but they're not
> >>>>>>>>going
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:45.88,0:00:47.95,Default,,0,0,0,,they want,
> >>>>>>>>but they're not going\Nto become a safer company.
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:47.95,0:00:49.52,Default,,0,0,0,,to become a
> >>>>>>>>safer company.\N>> They base everything on risk.
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:49.52,0:00:50.65,Default,,0,0,0,,>> They base
> >>>>>>>>everything on risk.\N"How many lives can we afford
> >>>>>>>>to
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:50.65,0:00:51.65,Default,,0,0,0,,"How many
> >>>>>>>>lives can we afford to\Nlose before we need to deal
> >>>>>>>>with
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:51.65,0:00:52.55,Default,,0,0,0,,lose before
> >>>>>>>>we need to deal with\Nthis?"
> >>>>>>>>+Dialogue: 0,0:00:52.55,0:00:53.25,Default,,0,0,0,,this?"\N>> 9-1.
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:53.25,0:00:55.22,Default,,0,0,0,,>> 9-1.\N>>
> >>>>>>>>Yes, this plant just blew up!
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:55.22,0:00:57.19,Default,,0,0,0,,>> Yes, this
> >>>>>>>>plant just blew up!\N>> From Texas and Alaska to the
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:57.19,0:00:58.39,Default,,0,0,0,,>> From
> >>>>>>>>Texas and Alaska to the\NGulf of Mexico...
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:00:58.39,0:01:00.19,Default,,0,0,0,,Gulf of
> >>>>>>>>Mexico...\N>> BP apologized again...
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:00.19,0:01:02.33,Default,,0,0,0,,>> BP
> >>>>>>>>apologized again...\N>> ... Apology after apology.
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:02.33,0:01:03.10,Default,,0,0,0,,>> ...
> >>>>>>>>Apology after apology.\N>> They pledged repeatedly
> >>>>>>>>to
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:03.10,0:01:05.40,Default,,0,0,0,,>> They
> >>>>>>>>pledged repeatedly to\Nrun a safer operation, yet
> >>>>>>>>they
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:05.40,0:01:07.17,Default,,0,0,0,,run a safer
> >>>>>>>>operation, yet they\Ncontinued to cut costs.
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:07.17,0:01:08.67,Default,,0,0,0,,continued to
> >>>>>>>>cut costs.\N>> We have a facility here that
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:08.67,0:01:10.17,Default,,0,0,0,,>> We have a
> >>>>>>>>facility here that\Ncould produce a cloud of gas
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:10.17,0:01:11.57,Default,,0,0,0,,could
> >>>>>>>>produce a cloud of gas\Nthat would make this place
> >>>>>>>>look
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:11.57,0:01:13.04,Default,,0,0,0,,that would
> >>>>>>>>make this place look\Nlike Hiroshima.
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:13.04,0:01:15.21,Default,,0,0,0,,like
> >>>>>>>>Hiroshima.\N>> What went wrong at BP?
> >>>>>>>>+Dialogue:
> >>>>>>>>0,0:01:15.21,0:01:17.11,Default,,0,0,0,,>> What went
> >>>>>>>>wrong at BP?\N>> The culture of BP management
> >>>>>>>This output looks better.
> >>>>>>>
> >>>>>>>
> >>>>>>>
> >>>>>>>_______________________________________________
> >>>>>>>ffmpeg-devel mailing list
> >>>>>>>ffmpeg-devel at ffmpeg.org
> >>>>>>>http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
> >>>>>> From 13dedb5bd7df3efd88f6a3b0dbc521e869d8f6a2 Mon Sep
> >>>>>>17 00:00:00 2001
> >>>>>>From: Anshul Maheshwari <er.anshul.maheshwari at gmail.com>
> >>>>>>Date: Tue, 28 Apr 2015 19:41:28 +0530
> >>>>>>Subject: [PATCH] Correcting jumbled ass of captions
> >>>>>>
> >>>>>>Signed-off-by: Anshul Maheshwari <er.anshul.maheshwari at gmail.com>
> >>>>>>---
> >>>>>> libavcodec/ccaption_dec.c | 6 +++++-
> >>>>>> 1 file changed, 5 insertions(+), 1 deletion(-)
> >>>>>>
> >>>>>>diff --git a/libavcodec/ccaption_dec.c b/libavcodec/ccaption_dec.c
> >>>>>>index da43ca6..540e17f 100644
> >>>>>>--- a/libavcodec/ccaption_dec.c
> >>>>>>+++ b/libavcodec/ccaption_dec.c
> >>>>>>@@ -338,6 +338,10 @@ static int
> >>>>>>reap_screen(CCaptionSubContext *ctx, int64_t pts)
> >>>>>> }
> >>>>>> }
> >>>>>>+ if(screen->row_used) {
> >>>>>>+ ctx->buffer.len -= 2;
> >>>>>>+ ctx->buffer.str[ctx->buffer.len] = 0;
> >>>>>>+ }
> >>>>>Please add an extra check about the ctx->buffer.len being >= 2
> >>>>>
> >>>>>> ctx->startv_time = pts;
> >>>>>> ctx->end_time = pts;
> >>>>>> return ret;
> >>>>>>@@ -550,7 +554,7 @@ static int decode(AVCodecContext
> >>>>>>*avctx, void *data, int *got_sub, AVPacket *avp
> >>>>>> int start_time =
> >>>>>>av_rescale_q(ctx->start_time, avctx->time_base,
> >>>>>>(AVRational){ 1, 100 });
> >>>>>> int end_time = av_rescale_q(ctx->end_time,
> >>>>>>avctx->time_base, (AVRational){ 1, 100 });
> >>>>>> av_dlog(ctx, "cdp writing data
> >>>>>>(%s)\n",ctx->buffer.str);
> >>>>>>- ret = ff_ass_add_rect(sub, ctx->buffer.str,
> >>>>>>start_time, end_time - start_time , 0);
> >>>>>>+ ret = ff_ass_add_rect_bprint(sub,
> >>>>>>&ctx->buffer, start_time, end_time - start_time);
> >>>>>> if (ret < 0)
> >>>>>> return ret;
> >>>>>> sub->pts = av_rescale_q(ctx->start_time,
> >>>>>>avctx->time_base, AV_TIME_BASE_Q);
> >>>>>LGTM otherwise
> >>>>>
> >>>>New patch attached.
> >>>>
> >>>>-Anshul
> >>>> From 5e801ff90102f886507213bab7a7e1e827e5b2ab Mon Sep 17
> >>>>00:00:00 2001
> >>>>From: Anshul Maheshwari <er.anshul.maheshwari at gmail.com>
> >>>>Date: Sun, 3 May 2015 18:37:40 +0530
> >>>>Subject: [PATCH] correcting line breaks in cc
> >>>>
> >>>>Signed-off-by: Anshul Maheshwari <er.anshul.maheshwari at gmail.com>
> >>>>---
> >>>> libavcodec/ccaption_dec.c | 6 +++++-
> >>>> 1 file changed, 5 insertions(+), 1 deletion(-)
> >>>>
> >>>>diff --git a/libavcodec/ccaption_dec.c b/libavcodec/ccaption_dec.c
> >>>>index da43ca6..264d21c 100644
> >>>>--- a/libavcodec/ccaption_dec.c
> >>>>+++ b/libavcodec/ccaption_dec.c
> >>>>@@ -338,6 +338,10 @@ static int
> >>>>reap_screen(CCaptionSubContext *ctx, int64_t pts)
> >>>> }
> >>>> }
> >>>>+ if(screen->row_used && ctx->buffer.len >= 2 ) {
> >>>>+ ctx->buffer.len -= 2;
> >>>>+ ctx->buffer.str[ctx->buffer.len] = 0;
> >>>>+ }
> >>>> ctx->startv_time = pts;
> >>>> ctx->end_time = pts;
> >>>> return ret;
> >>>>@@ -550,7 +554,7 @@ static int decode(AVCodecContext *avctx,
> >>>>void *data, int *got_sub, AVPacket *avp
> >>>> int start_time = av_rescale_q(ctx->start_time,
> >>>>avctx->time_base, (AVRational){ 1, 100 });
> >>>> int end_time = av_rescale_q(ctx->end_time,
> >>>>avctx->time_base, (AVRational){ 1, 100 });
> >>>> av_dlog(ctx, "cdp writing data (%s)\n",ctx->buffer.str);
> >>>>- ret = ff_ass_add_rect(sub, ctx->buffer.str,
> >>>>start_time, end_time - start_time , 0);
> >>>>+ ret = ff_ass_add_rect_bprint(sub, &ctx->buffer,
> >>>>start_time, end_time - start_time);
> >>>> if (ret < 0)
> >>>> return ret;
> >>>> sub->pts = av_rescale_q(ctx->start_time,
> >>>>avctx->time_base, AV_TIME_BASE_Q);
> >>>LGTM (apart from the style, but the whole file is broken in that regard
> >>>anyway)
> >>patch applied
> >>
> >>[...]
> >>
> >>
> >Actual test case patch is still not applied. we applied line break
> >patch which was by-product of the actual patch.
> >I am attaching patch again here.
> >
> >-Anshul
> Here is link of video which need to copied in the correct place.
> http://gsocdev.ccextractor.org/~anshul/test_video/Closedcaption_rollup.ts
this is 31mb, that does not seem reasonable for a subtitle test,
please provide a smaller file, like one without unused/untested
video streams or a shorter one
also fate fails with the patch applied
probably line endings arent preserved somewhere, probably best to
push to github and post a link
--- ./tests/ref/fate/sub-cc 2015-05-04 16:28:48.471575601 +0200
+++ tests/data/fate/sub-cc 2015-05-04 17:09:24.243626916 +0200
@@ -1,38 +1,38 @@
-[Script Info]
-; Script generated by FFmpeg/Lavc
-ScriptType: v4.00+
-PlayResX: 384
-PlayResY: 288
-
-[V4+ Styles]
-Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
-Style: Default,Arial,16,&Hffffff,&Hffffff,&H0,&H0,0,0,0,0,100,100,0,0,1,1,0,2,10,10,10,0
-
-[Events]
-Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
-Dialogue: 0,0:00:36.87,0:00:38.37,Default,,0,0,0,,( explosion )
-Dialogue: 0,0:00:38.37,0:00:40.51,Default,,0,0,0,,( explosion )\N( inaudible radio chatter )
-Dialogue: 0,0:00:40.51,0:00:41.88,Default,,0,0,0,,( inaudible radio chatter )\N>> Safety remains our number one
-Dialogue: 0,0:00:41.88,0:00:43.34,Default,,0,0,0,,>> Safety remains our number one\Npriority.
-Dialogue: 0,0:00:43.34,0:00:44.51,Default,,0,0,0,,priority.\N>> BP can talk about safety all
-Dialogue: 0,0:00:44.51,0:00:45.88,Default,,0,0,0,,>> BP can talk about safety all\Nthey want, but they're not going
-Dialogue: 0,0:00:45.88,0:00:47.95,Default,,0,0,0,,they want, but they're not going\Nto become a safer company.
-Dialogue: 0,0:00:47.95,0:00:49.52,Default,,0,0,0,,to become a safer company.\N>> They base everything on risk.
-Dialogue: 0,0:00:49.52,0:00:50.65,Default,,0,0,0,,>> They base everything on risk.\N"How many lives can we afford to
-Dialogue: 0,0:00:50.65,0:00:51.65,Default,,0,0,0,,"How many lives can we afford to\Nlose before we need to deal with
-Dialogue: 0,0:00:51.65,0:00:52.55,Default,,0,0,0,,lose before we need to deal with\Nthis?"
-Dialogue: 0,0:00:52.55,0:00:53.25,Default,,0,0,0,,this?"\N>> 9-1.
-Dialogue: 0,0:00:53.25,0:00:55.22,Default,,0,0,0,,>> 9-1.\N>> Yes, this plant just blew up!
-Dialogue: 0,0:00:55.22,0:00:57.19,Default,,0,0,0,,>> Yes, this plant just blew up!\N>> From Texas and Alaska to the
-Dialogue: 0,0:00:57.19,0:00:58.39,Default,,0,0,0,,>> From Texas and Alaska to the\NGulf of Mexico...
-Dialogue: 0,0:00:58.39,0:01:00.19,Default,,0,0,0,,Gulf of Mexico...\N>> BP apologized again...
-Dialogue: 0,0:01:00.19,0:01:02.33,Default,,0,0,0,,>> BP apologized again...\N>> ... Apology after apology.
-Dialogue: 0,0:01:02.33,0:01:03.10,Default,,0,0,0,,>> ... Apology after apology.\N>> They pledged repeatedly to
-Dialogue: 0,0:01:03.10,0:01:05.40,Default,,0,0,0,,>> They pledged repeatedly to\Nrun a safer operation, yet they
-Dialogue: 0,0:01:05.40,0:01:07.17,Default,,0,0,0,,run a safer operation, yet they\Ncontinued to cut costs.
-Dialogue: 0,0:01:07.17,0:01:08.67,Default,,0,0,0,,continued to cut costs.\N>> We have a facility here that
-Dialogue: 0,0:01:08.67,0:01:10.17,Default,,0,0,0,,>> We have a facility here that\Ncould produce a cloud of gas
-Dialogue: 0,0:01:10.17,0:01:11.57,Default,,0,0,0,,could produce a cloud of gas\Nthat would make this place look
-Dialogue: 0,0:01:11.57,0:01:13.04,Default,,0,0,0,,that would make this place look\Nlike Hiroshima.
-Dialogue: 0,0:01:13.04,0:01:15.21,Default,,0,0,0,,like Hiroshima.\N>> What went wrong at BP?
-Dialogue: 0,0:01:15.21,0:01:17.11,Default,,0,0,0,,>> What went wrong at BP?\N>> The culture of BP management
+[Script Info]
+; Script generated by FFmpeg/Lavc
+ScriptType: v4.00+
+PlayResX: 384
+PlayResY: 288
+
+[V4+ Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, OutlineColour, BackColour, Bold, Italic, Underline, StrikeOut, ScaleX, ScaleY, Spacing, Angle, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, Encoding
+Style: Default,Arial,16,&Hffffff,&Hffffff,&H0,&H0,0,0,0,0,100,100,0,0,1,1,0,2,10,10,10,0
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 0,0:00:36.87,0:00:38.37,Default,,0,0,0,,( explosion )
+Dialogue: 0,0:00:38.37,0:00:40.51,Default,,0,0,0,,( explosion )\N( inaudible radio chatter )
+Dialogue: 0,0:00:40.51,0:00:41.88,Default,,0,0,0,,( inaudible radio chatter )\N>> Safety remains our number one
+Dialogue: 0,0:00:41.88,0:00:43.34,Default,,0,0,0,,>> Safety remains our number one\Npriority.
+Dialogue: 0,0:00:43.34,0:00:44.51,Default,,0,0,0,,priority.\N>> BP can talk about safety all
+Dialogue: 0,0:00:44.51,0:00:45.88,Default,,0,0,0,,>> BP can talk about safety all\Nthey want, but they're not going
+Dialogue: 0,0:00:45.88,0:00:47.95,Default,,0,0,0,,they want, but they're not going\Nto become a safer company.
+Dialogue: 0,0:00:47.95,0:00:49.52,Default,,0,0,0,,to become a safer company.\N>> They base everything on risk.
+Dialogue: 0,0:00:49.52,0:00:50.65,Default,,0,0,0,,>> They base everything on risk.\N"How many lives can we afford to
+Dialogue: 0,0:00:50.65,0:00:51.65,Default,,0,0,0,,"How many lives can we afford to\Nlose before we need to deal with
+Dialogue: 0,0:00:51.65,0:00:52.55,Default,,0,0,0,,lose before we need to deal with\Nthis?"
+Dialogue: 0,0:00:52.55,0:00:53.25,Default,,0,0,0,,this?"\N>> 9-1.
+Dialogue: 0,0:00:53.25,0:00:55.22,Default,,0,0,0,,>> 9-1.\N>> Yes, this plant just blew up!
+Dialogue: 0,0:00:55.22,0:00:57.19,Default,,0,0,0,,>> Yes, this plant just blew up!\N>> From Texas and Alaska to the
+Dialogue: 0,0:00:57.19,0:00:58.39,Default,,0,0,0,,>> From Texas and Alaska to the\NGulf of Mexico...
+Dialogue: 0,0:00:58.39,0:01:00.19,Default,,0,0,0,,Gulf of Mexico...\N>> BP apologized again...
+Dialogue: 0,0:01:00.19,0:01:02.33,Default,,0,0,0,,>> BP apologized again...\N>> ... Apology after apology.
+Dialogue: 0,0:01:02.33,0:01:03.10,Default,,0,0,0,,>> ... Apology after apology.\N>> They pledged repeatedly to
+Dialogue: 0,0:01:03.10,0:01:05.40,Default,,0,0,0,,>> They pledged repeatedly to\Nrun a safer operation, yet they
+Dialogue: 0,0:01:05.40,0:01:07.17,Default,,0,0,0,,run a safer operation, yet they\Ncontinued to cut costs.
+Dialogue: 0,0:01:07.17,0:01:08.67,Default,,0,0,0,,continued to cut costs.\N>> We have a facility here that
+Dialogue: 0,0:01:08.67,0:01:10.17,Default,,0,0,0,,>> We have a facility here that\Ncould produce a cloud of gas
+Dialogue: 0,0:01:10.17,0:01:11.57,Default,,0,0,0,,could produce a cloud of gas\Nthat would make this place look
+Dialogue: 0,0:01:11.57,0:01:13.04,Default,,0,0,0,,that would make this place look\Nlike Hiroshima.
+Dialogue: 0,0:01:13.04,0:01:15.21,Default,,0,0,0,,like Hiroshima.\N>> What went wrong at BP?
+Dialogue: 0,0:01:15.21,0:01:17.11,Default,,0,0,0,,>> What went wrong at BP?\N>> The culture of BP management
Test sub-cc failed. Look at tests/data/fate/sub-cc.err for details.
make: *** [fate-sub-cc] Error 1
make: *** Waiting for unfinished jobs....
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
The educated differ from the uneducated as much as the living from the
dead. -- Aristotle
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