[FFmpeg-devel] Test case for Closed caption decoder.

Anshul anshul.ffmpeg at gmail.com
Tue Apr 28 16:20:15 CEST 2015

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.
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> ffmpeg-devel at ffmpeg.org
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