[mythtv-commits] Ticket #12546: Captions not recognized in MPEG-4 recordings (was: Captions not recognized in MP4 recordings)

MythTV noreply at mythtv.org
Thu Dec 3 20:36:50 UTC 2015


#12546: Captions not recognized in MPEG-4 recordings
--------------------------------+------------------------
 Reporter:  gravityhammer@…     |          Owner:
     Type:  Patch - Feature     |         Status:  new
 Priority:  minor               |      Milestone:  0.28
Component:  3rd Party - FFMPEG  |        Version:  0.27.5
 Severity:  medium              |     Resolution:
 Keywords:  MPEG-4 captions     |  Ticket locked:  0
--------------------------------+------------------------
Changes (by dekarl):

 * status:  assigned => new
 * component:  MythTV - General => 3rd Party - FFMPEG
 * owner:  jpoet =>
 * keywords:  MP4 captions => MPEG-4 captions
 * type:  Bug Report - General => Patch - Feature


Old description:

> Comcast recently moved to MP4 encoding on many channels here, and Myth is
> unable to recognize that there are captions in the file.  VLC plays the
> captions.
>
> From mediainfo:
> Text #1
> ID                                       : 4268 (0x10AC)-CC1
> Menu ID                                  : 1 (0x1)
> Format                                   : EIA-608
> Muxing mode                              : SCTE 128 / DTVCC Transport
> Muxing mode, more info                   : Muxed in Video #1
> Duration                                 : 1h 2mn
> Bit rate mode                            : Constant
> Stream size                              : 0.00 Byte (0%)
>
> Text #2
> ID                                       : 4268 (0x10AC)-1
> Menu ID                                  : 1 (0x1)
> Format                                   : EIA-708
> Muxing mode                              : SCTE 128 / DTVCC Transport
> Muxing mode, more info                   : Muxed in Video #1
> Duration                                 : 1h 2mn
> Bit rate mode                            : Constant
> Stream size                              : 0.00 Byte (0%)
>
> Text #3
> ID                                       : 4268 (0x10AC)-2
> Menu ID                                  : 1 (0x1)
> Format                                   : EIA-708
> Muxing mode                              : SCTE 128 / DTVCC Transport
> Muxing mode, more info                   : Muxed in Video #1
> Duration                                 : 1h 2mn
> Bit rate mode                            : Constant
> Stream size                              : 0.00 Byte (0%)
>
> A clip of a problematic recording is here:
> http://www.filetolink.com/4bd9ced67e
>
> mythbackend --version
> Please attach all output as a file in bug reports.
> MythTV Version : 68e51d6fd4fa25e985b21cb3a5b5ca6fce9aca9d
> MythTV Branch : fixes/0.27
> Network Protocol : 77
> Library API : 0.27.20151025-1
> QT Version : 4.8.5
> Options compiled in:
>  linux release use_hidesyms using_alsa using_oss using_backend
> using_bindings_python using_bindings_php using_frontend using_hdhomerun
> using_ceton using_hdpvr using_ivtv using_libcrypto using_libfftw3
> using_libxml2 using_libudf using_mheg using_opengl using_opengl_video
> using_qtwebkit using_qtscript using_qtdbus using_taglib using_v4l2
> using_x11 using_xrandr using_xv using_mythlogserver using_bindings_python
> using_bindings_php using_mythtranscode using_opengl using_vdpau
> using_ffmpeg_threads using_mheg using_libxml2 using_libudf

New description:

 Comcast recently moved to MPEG-4 encoding on many channels here, and Myth
 is unable to recognize that there are captions in the file.  VLC plays the
 captions.

 From mediainfo:
 Text #1
 ID                                       : 4268 (0x10AC)-CC1
 Menu ID                                  : 1 (0x1)
 Format                                   : EIA-608
 Muxing mode                              : SCTE 128 / DTVCC Transport
 Muxing mode, more info                   : Muxed in Video #1
 Duration                                 : 1h 2mn
 Bit rate mode                            : Constant
 Stream size                              : 0.00 Byte (0%)

 Text #2
 ID                                       : 4268 (0x10AC)-1
 Menu ID                                  : 1 (0x1)
 Format                                   : EIA-708
 Muxing mode                              : SCTE 128 / DTVCC Transport
 Muxing mode, more info                   : Muxed in Video #1
 Duration                                 : 1h 2mn
 Bit rate mode                            : Constant
 Stream size                              : 0.00 Byte (0%)

 Text #3
 ID                                       : 4268 (0x10AC)-2
 Menu ID                                  : 1 (0x1)
 Format                                   : EIA-708
 Muxing mode                              : SCTE 128 / DTVCC Transport
 Muxing mode, more info                   : Muxed in Video #1
 Duration                                 : 1h 2mn
 Bit rate mode                            : Constant
 Stream size                              : 0.00 Byte (0%)

 A clip of a problematic recording is here:
 http://www.filetolink.com/4bd9ced67e

 mythbackend --version
 Please attach all output as a file in bug reports.
 MythTV Version : 68e51d6fd4fa25e985b21cb3a5b5ca6fce9aca9d
 MythTV Branch : fixes/0.27
 Network Protocol : 77
 Library API : 0.27.20151025-1
 QT Version : 4.8.5
 Options compiled in:
  linux release use_hidesyms using_alsa using_oss using_backend
 using_bindings_python using_bindings_php using_frontend using_hdhomerun
 using_ceton using_hdpvr using_ivtv using_libcrypto using_libfftw3
 using_libxml2 using_libudf using_mheg using_opengl using_opengl_video
 using_qtwebkit using_qtscript using_qtdbus using_taglib using_v4l2
 using_x11 using_xrandr using_xv using_mythlogserver using_bindings_python
 using_bindings_php using_mythtranscode using_opengl using_vdpau
 using_ffmpeg_threads using_mheg using_libxml2 using_libudf

--

Comment:

 Unassigning as per http://lists.mythtv.org/pipermail/mythtv-
 users/2015-November/383200.html
 This feature patch against FFmpeg needs someone who adopts it and submits
 it upstream. Then it'll land in MythTV with the next FFmpeg sync.

 Any volunteers?

--
Ticket URL: <https://code.mythtv.org/trac/ticket/12546#comment:10>
MythTV <http://www.mythtv.org>
MythTV Media Center


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