John Rickman RISC OS Notes

Movie Video and Slideshow
# - slideshows
  !Variations
    has display with lots of different fades

  !Thump
    has simple display with no fades
    does not seem to have control over size of images
    to start slideshow -
    Menu on Thumbs:   >>Viewer >Slideshow

    set -
      >>Choices...
      >Viewer  Scale of new:100%
      Ignore pixel density [x]

    ***  fit screen uses 4:3 ratio - no good for widescreen monitor

   !Yassa
     needs looking into

# - movies

 Just to clarify, the complete FFmpeg package is simply a suite of
 audio/video converters. It supports a wide range of formats. The
 complete package is HUGE. What I have done is port the FFmpeg front-end
 program to RISC OS with a reasonable (but expanding) selection of format
 readers, but only a few format writers. The writers I have chosen are
 for formats that software available for RISC OS can display: PCM for
 audio; PNG and MPEG 1/2 for video. It can also copy (but not create) MP3
 streams.

 It works on Iyonix, A9home and StrongARM RiscPC. (It will not work
 properly on systems powered by ARM2 to ARM7 chips. It needs a StrongARM
 or later model of ARM chip.)

 What FFmpeg does NOT do is help you obtain videos in the first place. If
 you want to obtain videos from YouTube, you could use Murnong for that.
 (The Murnong project provided the initial impetus to port FFmpeg.) I do
 very little video work and don't access YouTube much. My internet access
 is relatively restricted. I released a port of FFmpeg simply so that
 people who already have access to videos in a variety of formats can
 convert and view them using only RISC OS software.

 I hope this clarifies what FFmpeg will do for you and what it won't.
 --
 Regards, Chris.


#  !FFmpeg

   ADFS::HardDisc5.$.DOCZ.miscellaneous.!ffmpeg/html

   - I have successfully converted AVI,MOV,WMV to MPEG

   errors:-
   set parameters 2:       -sameq -r 20

   but most likely will give error message:-

    [mpeg1video @ 0x6446c0]MPEG1/2 does not support 15/1 fps
    Error while opening codec for output stream #0.0 -
    maybe incorrect parameters such as bit_rate, rate, width or height

    solution - for 15/1 fps enter 30 into "frame rate"
    ******and for the moment turn off audio convert*******
    help suggests using AC3 but it does not work with the Wales avi

    There is a stronghelp manual for ffmpeg which covers common problems
    see "problems and solutions" link in footer

#  !MPlayer
   MPlayer - The Movie Player

   This RISC OS version was created by the GCCSDK Autobuilder

   See the "doc" subdir for more documentation or the official mplayer
   website at http://www.mplayerhq.hu

   Getting Started
   ---------------
   There is an obey file 'Example' included in the !MPlayer folder.
   Double-clicking on this will enable certain file types to be
   played automatically in mplayer.
   If nothing happens when you double-click a file try looking at the
   'stdout' and 'stderr' files in the !MPlayer folder.
   These may give a clue to the problem.

#  !Murnong -  download and convert YouTube films in one application.

   see help
   Formats        *.MOV - &BF8

   Mime: video/mpeg           RISCOS: BF8           Extns: mpeg mpg mpv
   Mime: video/x-mpeg2        RISCOS: BF8
   Mime: video/x-msvideo      RISCOS: FB2           Extns: avi
   Mime: video/quicktime      RISCOS: FB2           Extns: mov
   Mime: video/avi            RISCOS: FB2           Extns: avi
   Mime: video/msvideo        RISCOS: FB2           Extns: avi
   Mime: video/x-msvideo      RISCOS: FB2
   Mime: video/acorn-replay   RISCOS: AE7 Armovie   Extns: replayrpl

#  note from csa.app
   FFMpeg is really a well behaving, useful application.

   I found my Minolta .mov files have got an audio component
   pcm_s16be  7832 Hz.
   That is a stopper until I set the encoding sample rate to 22050,
   or if I select libmp3lame or ac3 I can drop to 11025.
   There doesn't seem to be any appreciable difference in size, the
   17MB .mov still reduces to approx 1.5MB (MPEG 1)