Embedded subtitle are disabled for decodebin2

Thu Apr 10 03:44:29 PDT 2014

Hello,

I am using next pipeline to play video file with embedded subtitle on a
i.MX6 board with GStreamer 0.10.35:
gst-launch  filesrc location=/mnt/sda1/Claymore.mkv ! decodebin2 name=demux
! subtitleoverlay name=overlay  ! ffmpegcolorspace ! mfw_ipucsc !
mfw_v4lsink  demux.  ! queue ! overlay.

The problem is that decodebin2 ignores the embedded subtitle. In the logs it
can be seen that audio and video tracks are enabled but subtitle tracks are
disabled. Is there a way I can enable the embedded subtitles? Is this
happening because I am missing some codecs for subtitles?

//The logs
[0m[1;34m	      file:///mnt/sda1/Claymore.mkv
[0m[1;34m	Idx File:
[0m[1;34m	      /root/.aiur/.mnt.sda1.Claymore.mkv.aidx
[0m[1;34m	Seekable  : Yes
[0m[1;34m	Size(byte): 211312391

[0m[1;34mMovie Info:
[0m[1;34m	Seekable  : Yes
[0m[1;34m	Live      : No
[0m[1;34m	Duration  : 0:22:50.721000000
[0m[1;34m	ReadMode  : Track
[0m[1;34m	Track     : 5

[0m[1;34mTrack 00 [video_000000] Enabled
[0m[1;34m	Duration: 0:22:50.721000000
[0m[1;34m	Language: und
[0m[1;34m	Mime:
[0m[1;34m	      video/x-h264, parsed=(boolean)true, width=(int)720,
height=(int)400, framerate=(
[0m[1;34m	      fraction)29/1,
codec_data=(buffer)00000001674d40339e2101686742000007d20001d4c11e
[0m[1;34m	      3065400000000168ee3c80
[0m[1;32mvpudec versions :)
[0m[1;32m	plugin: 3.0.5
[0m[1;32m	wrapper: 1.0.28(VPUWRAPPER_ARM_LINUX Build on Oct 22 2013
15:28:56)
[0m[1;32m	vpulib: 5.4.10
[0m[1;32m	firmware: 2.1.8.34588
[0m[1;34mTrack 01 [audio_000000] Enabled
[0m[1;34m	Duration: 0:22:50.721000000
[0m[1;34m	Language: eng
[0m[1;34m	Mime:
[0m[1;34m	      audio/mpeg, mpegversion=(int)1, framed=(boolean)true,
channels=(int)2, rate=(int
[0m[1;34m	      )48000, bitrate=(int)0
[0m[1;34mTrack 02 [audio_000001] Enabled
[0m[1;34m	Duration: 0:22:50.721000000
[0m[1;34m	Language: jpn
[0m[1;34m	Mime:
[0m[1;34m	      audio/mpeg, mpegversion=(int)1, framed=(boolean)true,
channels=(int)2, rate=(int
[0m[1;34m	      )48000, bitrate=(int)0
[0m[1;34mTrack 03 [subtitle]: Disabled
[0m[1;34m	Codec: 0, SubCodec: 0
[0m[1;34mTrack 04 [subtitle]: Disabled
[0m[1;34m	Codec: 0, SubCodec: 0
[0m[1;34mBeep: 3.0.5 

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