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#410 CC options in GUI

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open-accepted
None
5
2013-06-07
2013-06-07
Jon Kar
No

It seems that latest MediaInfo does not support some Closed Captions (like EIA-708 or EIA-608).

VLC shows (and plays them), but MediaInfo says nothing about them.

Discussion

  • Jon Kar
    Jon Kar
    2013-06-07

    Sample file.

     
    Attachments
  • The sample you provided has no caption displayed by VLC.
    MediaInfo scans only the beginning and end of the file, so if the caption is too late (more than 1 minute), it is not detected (MediaInfo displays CC only if content is detected in the scanned bytes).
    By 608/708 design, it is not possible to detect the CC without parsing lot of data, so long.
    It is possible to scan the whole file with the command line version, and CC is usually displayed in that case.

    What is expected, with technical limitations in mind, with this request?

     
  • Jon Kar
    Jon Kar
    2013-06-07

    Sorry, my mistake. I have uploaded 10 Mb file instead of 20 Mb file.
    As you can see this file is 9s long and VLC shows CC, but MI does not. I would like MI to display it as well.
    http://snag.gy/FYhwN.jpg

     
    Attachments
  • Still no caption content (normal, there is nobody speaking).
    VLC says only that there is a caption stream (I bet your file does not have 4 caption services), but it does not say that there is content. by default, MI displays information only when content is detected.

    Do you mean you want something displayed even if there is no content (only padding) in the caption stream?
    There is an option for that, but currently only with command line.

     
  • Jon Kar
    Jon Kar
    2013-06-07

    The first caption is on 31st second (so theoretically MI should find it): http://snag.gy/rve7J.jpg

    It would be handy if MI could notify users that CC were found even if they are empty within the first minute or so. In other words, even if there is no content, it would be nice to know that caption stream is present.

    For example MI tells that all "EIA-708" have "Stream size :0.00 Byte (0%)". It is not true, but at least I know that this stream is present.

     
  • In other words, even if there is no content, it would be nice to know that caption stream is present.

    It is currently a lot hidden (I did not write yet the doc)
    Command line / DLL: --File_Eia608_DisplayEmptyStream=1 --File_Eia708_DisplayEmptyStream=1
    Graphical interface: not implemented yet.

    The first caption is on 31st second (so theoretically MI should find it):

    Argh, I said crap. I checked the code.
    There are currently 2 limits:
    - 30 seconds
    - 64 MB
    I think you are at the limit with your file.

    Both values can be changed by configuration (command line or DLL)

    Is your feature request for graphical interface?

    Both limits are changeable by configuration (still only command line).

     
  • Jon Kar
    Jon Kar
    2013-06-07

    It is great that at least command line allows to display it.

    Ultimately, possibility to do that in GUI would be very appreciated. Reason: when I get a new file the first thing I do is I load it into MI to see what it is made off. Thus I want to know as much as possible about it without going deep into command line.

     
    • summary: CC not supported --> CC options in GUI
    • status: open --> open-accepted
    • assigned_to: Jerome Martinez
     
  • Accepted.

    Warning: non-paid feature request are set to low priority, I don't know when I have time to handle it.
    If you desire to accelerate the development, don't hesitate to contact me for a quotation.