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116 lines
4.6 KiB
Plaintext
116 lines
4.6 KiB
Plaintext
DXR3/H+ video/audio output plugins manual by David Holm
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=======================================================
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2001-12-28: There is a whole bunch of updates since the
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last time. For one thing, digital audio now
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works thanks to Steven Brookes.
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This is the first version to exclusively
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use the dxr3's hardware sync. It seems as if
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there are some bugs in the driver, so bugreports
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will be appreciated.
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Also, you will need to get the em8300 drivers
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from cvs unless a version newer than 0.9.0 has
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been released.
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Note1: Seeking won't work with -vc mpegpes!
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Note2: You now MUST use -ao dxr3 for proper
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a/v sync!
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2001-12-04: Thanks to Inaki Garci'a Etxebarria of
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zapping.sourceforge.net we have now
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abandoned rte since it caused problems for
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users who didn't rtfm and compiled it with
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ffmpeg support. Instead we are now using
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libmp1e which is a modified version of mp1e.
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2001-11-29: Thanks to Felix Buenemann I managed to
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optimize the odivx playback as well as add
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support for the rest of the codecs!
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1. Introduction
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The DXR3 and Hollywood+ are two not too different mpeg-(1/2) and ac3
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hardware playback cards that came at about the same time as the first
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dvd-rom drives hit the market. At that time most computers weren't
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powerful enough for synced software dvd playback. And even the faster
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(intel-based) computers had troubles with artifacts.
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Sigma Designs came up with the great idea to create a hardware
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mpeg-(1/2), ac3 decoder. Sigma Designs are known for their realmagic
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hardware (or they bought the company who came up with the first
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realmagic boards, I don't know which).
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Later Creative Labs thought, hey, we also wan't this product, and to
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distribute it with our dvd-drives (the DVD Encore packages if I recall
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correctly). So they bought the designs for the Hollywood plus and
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replaced the circuit used to produce a proper video feed for tv's
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called adv7170 or adv7175a depending on which h+ board you own with
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a bt865. The reason for this is beyond my understanding as this seems
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complete illogical to me, but I have had great experiences with
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bt(brooktree) circuits in the past, so I don't mind.
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Well, nowadays most people have no use for a mpeg-(1/2) or ac3
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hardware decoder since most computers these days have no problem doing
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this in software and have cycles left for posprocessing (removing of
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artefacts and other garbage produced by compression).
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These days, you have two uses for this card:
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1. You have a slow computer which you use for vcd/dvd playback
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2. You discover what I have done with the implementation of this as
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an audio/video output device for mplayer (read on and you'll find
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out).
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2. Requirements
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* First of all you will need the DXR3/H+ drivers properly installed.
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Version 0.9.0 or later
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* Run <mplayerdir>/configure and make sure that DXR3/H+ support = yes
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From here on compilation (of at least my code ;) should go without any
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problems.
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3. Usage
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After installation you will have two new outdevices in mplayer:
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-vo dxr3 For video output
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-ao dxr3 For audio output
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MPEG-1, MPEG-2, VCD and DVD Notes
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There are some notes to take into account here for optimum playback.
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When playing any mpeg-(1/2) file, this including usage of the "-dvd"
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and "-vcd" options you must either add the "-vc mpegpes" or edit
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codecs.conf and make sure videocodec mpegpes is listed above mpeg12.
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If you fail to do this you will only get software playback which kinda
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spoils most of the useful features of this card except for tv-out ;).
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Remember that if you edit the codecs.conf file and move the mpegpes
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section will have to specify "-vc mpeg12" if you want to playback
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any of these video types _without_ "-vo dxr3"!
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Use -ac hwac3 if you want AC3 audio to be handled by hardware (please
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send some feedback on this).
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DIVX Notes
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When playing divx's add "-vc odivx" for maximum performance.
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I've switched to mp1e from ffmpeg so it should be lightning fast now.
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libmp1e currently does not work on nonx86 processor and nonmmx processors.
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I'm in the process of fixing this.
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Other codecs:
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No "-vc <codec>" switches should be required as mplayer will autodetect.
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If you find an unsupported codec please contact me!
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* Avoid running mplayer as root or setuid root as rtc timing seems to
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slow down playback on the dxr3 for some users. I will look into this
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at a later point as this hardly qualifies as a severe bug *
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4. Contacting me
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You can contact me either by e-mailing me, <dholm@iname.com> or by using
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icq: 798427
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Feedback, bugreports and general suggestions are appreciated (preferably
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by e-mail). My name is David Holm for those of you who are incapable of
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reading a heading. ;)
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