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- 18. _M_e_d_i_a__R_e_c_o_r_d_e_r__T_o_o_l
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- The Media Recorder Tool (invoked from the command line as
- _m_e_d_i_a_r_e_c_o_r_d_e_r) is a graphical tool that allows you to record
- audio files, movie files or still images from the camera or
- other video source, microphone and workstation screen.
-
- Currently, the video capture modes of Media Recorder work on
- the following hardware:
-
- +o The O2 workstation
-
- +o The Octane workstation with Octane Video, Octane
- Compression, or Octane Personal Video option boards
-
- +o the Indy workstation, including the Indy Video and
- Cosmo Compress option boards
-
- +o the Indigo2 workstation with the Galileo, Indigo2
- Video, Indigo2 Video for IMPACT, or Cosmo Compress
- option boards.
- Audio capture is supported on all systems with an audio
- input.
-
- See the man page _m_e_d_i_a_r_e_c_o_r_d_e_r(1) or Media Recorder's on-
- line help for more information.
-
-
- 18.1 _C_h_a_n_g_e_s__a_n_d__A_d_d_i_t_i_o_n_s
-
-
- This section lists changes and additions to Media Recorder
- since the IRIX 6.2 release.
-
- +o The Media Recorder Tool replaces the old Capture Tool,
- found on IRIX 5.x and 6.2. Media Recorder contains
- many new features, user interface improvements,
- improved reliability and performance compared to the
- Capture Tool.
-
- The command name _c_a_p_t_u_r_e and its command line syntax
- have been retained for backwards compatibility, but
- their use is strongly deprecated. Please refer to the
- manual page for _m_e_d_i_a_r_e_c_o_r_d_e_r(_1) and update your
- scripts accordingly. Note that _m_e_d_i_a_r_e_c_o_r_d_e_r(_1) offers
- new features not supported by _c_a_p_t_u_r_e, which may be
- accessed only through the new command line syntax.
-
- +o Media Recorder directly supports motion JPEG
- compression hardware, such as the Cosmo Compress board
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- and the motion JPEG capabilities built into the O2
- workstation.
-
- +o Media Recorder allows you to record movie files from
- the workstation screen.
-
- Screen recording via software (the X server) is
- supported on all systems. On SGI systems with optional
- or built-in video capability, such as the O2
- workstation, the Indy/Indigo2 with the Cosmo Compress
- option, or the Octane with Octane Personal Video, you
- can record QuickTime movies with motion JPEG
- compression from the workstation screen.
-
- +o Media Recorder provides greatly improved video
- recording performance and audio-video synchronization
- as compared to the Capture Tool.
-
- +o Media Recorder is now capable of using multiple disk
- volumes at once to achieve higher rate captures, given
- the appropriate hardware. See the _m_e_d_i_a_r_e_c_o_r_d_e_r(_1)
- manual page for more details.
-
- +o Media Recorder can also take advantage of IRIX
- scheduling priorities to achieve better video capture.
- See the _m_e_d_i_a_r_e_c_o_r_d_e_r(_1) manual page for more details.
-
- +o Media Recorder fully supports the IRIX Interactive
- Desktop(TM). Newly recorded media files appear as
- icons right inside the Media Recorder display. You can
- rename them or drag them to other applications. You
- can also choose the directory in which to record files
- by dragging a desktop folder into the icon pocket in
- the Media Recorder display.
-
- +o Media Recorder now allows you to choose audio and video
- jacks directly from within the application. The Audio
- and Video control panels can still be used to set
- signal timing (NTSC vs. PAL) and to adjust audio input
- levels.
-
- +o There is a new user interface for selecting regions of
- the screen, which is improved over that provided by the
- Capture Tool.
-
- +o You can now set a time delay before recording starts,
- allowing you to grab screenshots of menus and other
- mouse-sensitive tasks.
-
- +o The user interface for choosing movie parameters has
- been greatly improved compared to the Capture Tool.
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- You can now choose from a list of "smart presets"
- appropriate to specific recording tasks. You can still
- control all aspects of the capture, if you so choose.
-
- +o Media Recorder now supports Copy and Paste to other
- applications, include Media Maker and Sound Track.
-
- +o The still image feature now supports several popular
- formats, including JPEG, GIF and TIFF. You can also
- view captured images in place, rather than in a
- separate window.
-
- +o The audio recording feature now supports AIFF and WAVE
- file formats. It also supports four-channel and
- eight-channel recording.
-
- +o Media Recorder now provides estimates of the amount of
- time remaining, based upon data rate and free disk
- space, while capture is in progress.
-
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- 18.2 _B_u_g__F_i_x_e_s
-
-
- This section lists problems in Media Recorder which have
- been fixed since the IRIX 6.4 release.
-
- +o The command line options have been enhanced. You can
- now specify compression, color packing, and interlacing
- settings for movie files, specify screen recording
- options, and direct the tool to record without human
- intervention. For more details, see the _m_e_d_i_a_r_e_c_o_r_d_e_r
- manual page.
-
- +o There have been several minor user interface
- improvements. The Clip Bin has been reworked to look
- and behave more like other desktop media applications
- such as _m_o_v_i_e_m_a_k_e_r. You can now freely adjust the size
- of the Clip Bin relative to the viewing area. More
- prompts have been added in areas to help those
- unfamiliar with the tool, and Media Recorder now
- visually highlights the chosen recording mode (movie,
- image or audio) onscreen.
-
- +o There are new new menu options to launch external
- editors, players, conversion and info displays on media
- files. For more details, see the online user
- documenation.
-
- +o Support for Apple's QuickTime Motion JPEG-A format has
- been included. This Motion JPEG format is compatible
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- with QuickTime running on non-SGI platforms. The SGI
- Motion JPEG format has been preserved, for
- compatibility with applications running on earlier
- releases of IRIX.
-
- +o Media Recorder's ability to perform data conversions
- when writing movie files has been enhanced. This allows
- you to select movie parameters, such as size, color
- space, interlacing, and compression settings, without
- regard for the capabilities of your system's underlying
- video hardware. Media Recorder will take advantage of
- hardware capabilities, such as color space conversion
- and Motion JPEG compression, and perform software
- format conversion only when necessary.
-
- +o If recording aborts because audio or video was dropped,
- you will still get a useful media file. Previous
- versions of the tool would discard the file if audio or
- video was dropped while recording.
-
- +o Audio recording and waveform display now uses less CPU
- time than earlier versions of the tool.
-
- +o The Movie Settings dialog now accurately displays the
- dimensions for the final movie file, based upon the
- current video signal being recorded.
-
- +o Media Recorder now displays time elapsed as well as
- time remaining when recording video and audio files.
-
- +o Fixed startup problems when Media Recorder was invoked
- multiple times concurrently on systems equipped with
- video.
-
- +o Added support for the Octane Personal Video hardware
- option.
-
- +o Other minor bug fixes to improve reliability in error
- situations, and with certain video option boards.
-
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- 18.3 _K_n_o_w_n__P_r_o_b_l_e_m_s__a_n_d__W_o_r_k_a_r_o_u_n_d_s
-
-
- This section lists known problems in Media Recorder. Also,
- please see the _m_e_d_i_a_r_e_c_o_r_d_e_r manual page for more usage
- notes.
-
- +o Since the system has limited video resources, it is
- best to avoid running more than one application that
- uses video. In particular, you shouldn't run Live
-
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- Video Input (_v_i_d_e_o_i_n from the command line) at the same
- time as running _m_e_d_i_a_r_e_c_o_r_d_e_r. Nor should you attempt
- to run two instances of _m_e_d_i_a_r_e_c_o_r_d_e_r both capturing
- video at once.
-
- +o When switching to quarter sized video, it is possible
- to make the window so small that the buttons overlap
- one another. To work around this problem, make the
- window larger.
-
- +o It can take up to a second for video to start or stop
- recording after you press the Record button.
-
- +o If you completely fill the disk while recording a
- movie, you often cannot get a usable movie file. This
- is because there is insufficient temporary disk space
- available to create the final movie file. To work
- around this problem, set up your scratch disks on a
- different drive or filesystem than the one which will
- contain the final movie file. Alternately, you can
- avoid the practice of recording video right up until
- the moment the disk is full.
-
- +o If you are creating JPEG compressed movies on O2, and
- you customize the capture "Task Settings" from the
- "Tasks -> Show Task Settings" menu, then you must take
- care to ensure that the "Advanced Options ->
- Interlacing" pop-up menu is set to "Two Fields".
- Otherwise, mediarecorder may crash or hang when it
- performs its "post-processing" operation. A movie that
- is captured with "Two Field" interlacing may be
- converted to non-intlaced "One Frame" format by using
- moviemaker or dmconvert.
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