Anyone knows how to retrieve embedded subtitle language?

[g-newbie]

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[Tim-Philipp Müller-2]

On Wed, 2011-08-03 at 20:22 -0700, g-newbie wrote:

Hi,

> I need help here, on how to get the language of embedded subtitles in a MKV
> video file. So far, i can only get the subtitle type, which is S_TEXT_ASS,
> but can't find a way to get the languauge of the subtitle.

There will be a tag event before the first buffer with a
GST_TAG_LANGUAGE tag, if the language is known.

If you're using playbin2, you can get this information via

  GstTagList *tags;

  g_signal_emit_by_name (playbin2, "get-text-tags", n, &tags);
  ... process tags ...
  gst_tag_list_free (tags);

where n is the n-th subtitle stream counting from 0.

 Cheers
  -Tim


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[g-newbie]

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[Tim-Philipp Müller-2]

On Thu, 2011-08-04 at 01:29 -0700, g-newbie wrote:

> Thanks so much for the reply. But, i encounter compile error: "error:
> 'GST_TAG_LANGUAGE' undeclared (first use in this function)". Below is the
> code snippet on how i do it.
>   (snip)
> I've tried instead with GST_TAG_LANGUAGE_CODE, but it returns no such string
> the tag.

It should've been GST_TAG_LANGUAGE_CODE, sorry.

Do you get any tags at all though? Like many other things, the
"get-xyz-tags" action signal will most likely only work once you've set
the pipeline to PAUSED or PLAYING state *and* it has prerolled (ie. you
have gotten an ASYNC_DONE message on the pipeline's bus). You need to
wait for it to preroll, you can't just query it right after doing the
_set_state().

 Cheers
  -Tim

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[g-newbie]

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[yinxb]

have a look ISO639,a snapshot is

        {"zh",  "Chinese"},
        {"en",  "English"},
        {"ja",   "Japanese"},
        {"fr",   "French"},
        {"de",  "German"},
        {"ko",  "Korean"},
        {"ga",  "Irish"},
        {"it",   "Italian"},
        {"mn", "Mongolian"},
        {"es",  "Spanish"},
        {"pt",  "Portuguese"},
        {"ru",  "Russian"},
        {"sa",  "Sanskrit"},
        {"und", "Undetermined"},


在 2011-08-04四的 02:04 -0700，g-newbie写道：

> Hi, thanks. I think i missed out that part. After having the pipeline
> prerolled, is able to get tag for subtitle already. But it returns "und" for
> the GST_TAG_LANGUAGE_CODE, while my subtitle is in chinese language. Is this
> correct?
>
> --
> View this message in context: http://gstreamer-devel.966125.n4.nabble.com/Anyone-knows-how-to-retrieve-embedded-subtitle-language-tp3717597p3718050.html
> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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[Tim-Philipp Müller-2]

On Thu, 2011-08-04 at 02:04 -0700, g-newbie wrote:

> Hi, thanks. I think i missed out that part. After having the pipeline
> prerolled, is able to get tag for subtitle already. But it returns "und" for
> the GST_TAG_LANGUAGE_CODE, while my subtitle is in chinese language. Is this
> correct?

Depends, you'd have to check what information is contained in the file
headers.

Cheers
 -Tim

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