The VideoLAN Forums

Posted: **14 Jan 2021 01:13**

If I look at the list of modules with vlc -l there are lots of duplicates. In most cases the descriptions are different. How do I specify the right one in the command-line? For example there are two different modules called mmal_vout. I try to get help with vlc -p mmal_vout --advanced --help-verbose but I don't know which one it's talking about.

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$ vlc -l | grep mmal
VLC media player 3.0.11 Vetinari (revision 3.0.11-0-gdc0c5ced72)
  mmal_vout              mmal_vout
  mmal_vout              MMAL-based vout plugin for Raspberry Pi
  mmal_avcodec           MMAL buffered avcodec 
  mmal_deinterlace       MMAL-based deinterlace filter plugin
  mmal_codec             MMAL-based decoder plugin for Raspberry Pi
  mmal_codec             MMAL resizing conversion filter
  mmal_codec             Video pictures blending for MMAL
  mmal_codec             Video pictures blending for neon
  mmal_converter         MMAL OpenGL surface converter
  mmal_xsplitter         MMAL x11 splitter for Raspberry Pi

Posted: **14 Jan 2021 14:45**

There should never be two modules with the same name and same capability. Otherwise there are no ways to specify which one.

Posted: **14 Jan 2021 16:18**

I found the --list-verbose option today. It looks like most of these have different capabilities, but I'm still not sure how to specify one. For example mmal_codec is both decoder, converter, blending (120), and blending (110). I'm not sure what the numbers mean here.
One of the mmal_vout entries shows no capabilities, so should I assume that one is not being used? The reason I'm asking is I'm trying to debug an issue where I sometimes get no video output, so I'm wondering if it's choosing the wrong one.

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  mmal_vout              mmal_vout
  mmal_vout              MMAL-based vout plugin for Raspberry Pi
   c vout display (16)
  mmal_avcodec           MMAL buffered avcodec 
   c video decoder (80)
  mmal_deinterlace       MMAL-based deinterlace filter plugin
   s deinterlace
   c video filter (900)
  mmal_codec             MMAL-based decoder plugin for Raspberry Pi
   s mmal_decoder
   c video decoder (90)
  mmal_codec             MMAL resizing conversion filter
   s mmal_converter
   c video converter (900)
  mmal_codec             Video pictures blending for MMAL
   s mmal_blend
   c video blending (120)
  mmal_codec             Video pictures blending for neon
   s neon_blend
   c video blending (110)
  mmal_converter         MMAL OpenGL surface converter
   s mmal_gl_converter
   c glconv (900)
  mmal_xsplitter         MMAL x11 splitter for Raspberry Pi
   s mmal_x11
   c vout display (300)

The VideoLAN Forums

Multiple modules by the same name

Multiple modules by the same name

Re: Multiple modules by the same name

Re: Multiple modules by the same name