Unofficial OPPO BDP-83 Frequently Asked Questions

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Yes, it is quick and painless if you have high speed internet. Connecting your broadband, Freeview and TV. The On Screen Display has a special icon for this. Again, it should only require keypresses. See the Guide to the Progressive Scan Shootouts for details. On the other hand, due to the complexity of the Blu-ray standard and the evolving nature of the business, all player brands and models may still encounter compatibility issues from time to time.

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After a control point has discovered a device, the control point still knows very little about the device. For the control point to learn more about the device and its capabilities, or to interact with the device, the control point must retrieve the device's description from the location URL provided by the device in the discovery message.

The UPnP Device Description is expressed in XML and includes vendor-specific manufacturer information like the model name and number, serial number , manufacturer name, presentation URLs to vendor-specific web sites, etc. The description also includes a list of any embedded services. For each service, the Device Description document lists the URLs for control, eventing and service description. Each service description includes a list of the commands , or actions , to which the service responds, and parameters, or arguments , for each action; the description for a service also includes a list of variables ; these variables model the state of the service at run time , and are described in terms of their data type, range, and event characteristics.

Having retrieved a description of the device, the control point can send actions to a device's service. To do this, a control point sends a suitable control message to the control URL for the service provided in the device description. Much like function calls , the service returns any action-specific values in response to the control message.

The effects of the action, if any, are modeled by changes in the variables that describe the run-time state of the service. Another capability of UPnP networking is event notification , or eventing. A UPnP description for a service includes a list of actions the service responds to and a list of variables that model the state of the service at run time. The service publishes updates when these variables change, and a control point may subscribe to receive this information.

The service publishes updates by sending event messages. Event messages contain the names of one or more state variables and the current value of those variables. These messages are also expressed in XML.

A special initial event message is sent when a control point first subscribes; this event message contains the names and values for all evented variables and allows the subscriber to initialize its model of the state of the service. To support scenarios with multiple control points, eventing is designed to keep all control points equally informed about the effects of any action.

Therefore, all subscribers are sent all event messages, subscribers receive event messages for all "evented" variables that have changed, and event messages are sent no matter why the state variable changed either in response to a requested action or because the state the service is modeling changed.

The final step in UPnP networking is presentation. The degree to which each of these can be accomplished depends on the specific capabilities of the presentation page and device. These enhancements are created by adding capabilities to the MediaServer and MediaRenderer device classes, allowing a higher level of interoperability between products made by different manufacturers.

Some of the early devices complying with these standards were marketed by Philips under the Streamium brand name.

Since , versions 3 and 4 of the UPnP audio and video device control protocols have been published. It is a computer system or a similar digital appliance that stores digital media, such as photographs, movies, or music and shares these with other devices. UPnP AV media servers provide a service to UPnP AV client devices, so-called control points , for browsing the media content of the server and request the media server to deliver a file to the control point for playback.

UPnP media servers are available for most operating systems and many hardware platforms. Deep Color which ought to be called "greater than 8-bit color" provides a finer gradation of shades between the colors encoded on the disc.

It is conceivable that Deep Color might reduce banding in some images, although I never see banding in real films as opposed to cheaply produced logos and fx screens. Someone could produce a test pattern demonstrating the effect with and without, but I haven't seen one yet.

The sad truth is that Blu-ray and DVD use the same rather limited 8-bit greyscale and color gamut. Turning on Deep Color doesn't change that. Both disc formats record their images as 8-bit YCbCr 4: Using greater than 8-bit computations when doing Chroma Upsampling to restore full color resolution may do something to preserve a more accurate color image, but it is a very minor effect.

This works even while playback is paused. Whatever setting you choose is automatically saved in Setup. It does not work for media file subtitles.

Another restriction is that the shift is purely "up" and "down". Sometimes subtitles appear high on the display for example, so as not to obscure onscreen credits and it would be nice if these were shifted down when lower titles were shifted up, but the player does not currently do that. Subtitle shifting is a feature the Constant Image Height users like. It can be used to shift subtitles out of the black bars and onto the image itself.

Even though I use a simple flat panel without zoom, I find myself using the feature as well. I like the subtitles as low on the screen as possible. This feature is for use with the various Zoom modes.

Without it the On Screen Display is shifted off screen when zooming. Yes, i50 content is supported. The output depends on the player resolution and TV System settings:.

Obviously, your display must be capable of receiving a 50hz signal if you want to use one of those options. We do not have details on the frame rate conversion algorithms. See the List of Blu-ray movies authored in i Opinions vary, but the consensus seems to be that Blu-ray player picture quality is very similar among all players producing p images from p disc content, which is how almost all film-based movies are mastered on Blu-ray disc.

These comments from an industry insider may be of interest. Not everyone agrees that "Blu-ray player picture quality is very similar among all players producing p images from p disc content. I think the OPPO may be the best -- not trying to build up hype or exaggerate, I care about video very much and I am very very picky -- no BD player I know of so far has a image as clean and naturally sharp as this unit, and that includes players I have used that I have modified for HD-SDI.

It's all about the decoder and the decoder that OPPO used is from folks that know what they are doing; they are the best. DVD video must be deinterlaced before it can be scaled. There is a huge variety in progressive scan performance in DVD players. Particularly instructive articles on deinterlacing artifacts from that site are:. Sadly, the site is no longer maintained and many recent players have not been tested. Winston's Reviews is performing a similar function for Blu-ray players and he covers DVD performance.

I don't know what the limits are in getting the best possible picture out of the x pixels, but we must be close to the end. I would never claim that a DVD image can match a good Blu-ray image, but many times I have looked at images on these players and said "I can't believe this is standard definition.

On the other hand, the better quality DVD players are probably very close to one another. On the third hand, sometimes even small differences, once seen, tend to loom large in the mind and become bothersome. If you have multiple calibration discs and spend a lot of time using them and trying different color spaces and other things in an attempt to squeeze that last few percent of video quality out of DVD, you will probably appreciate the DVD performance of this player.

If you don't, then which chip set a player uses for deinterlacing and scaling DVD is not the most important consideration. Here are some timings reported during the beta period, as compared with the 40GB PS3 running firmware 2. On the early machines, from power off to tray eject using the Eject button is about 11 seconds. With more recent hardware people are reporting eject times of about 2 seconds.

Total boot up time is still about 11 seconds total. If BD-Live is enabled some discs will download stuff from the network while loading. For example, the Transformers disc takes over 2 minutes to load the first time, and about 25 seconds to load if you play it again without erasing the persistent storage. Iron Man is said to be another example. See Can BD-Live be turned off? This is the worst case; real world examples should be quicker.

In my own viewing I can sometimes detect a DVD layer change, but it is too quick to estimate the time. By way of comparison, using the same test, the PS3 V2. The drives have a limited amount of buffer memory and although players can buffer at the decoder, this is not as effective in concealing the layer change. The other beta testers report taking no special care in cleaning their rental discs and have had no troubles.

The "tier 0" titles in The New PQ Tier thread for Blu-Ray have been chosen for their sharpness and vividness of color; they "consistently offer reference level high-definition picture quality.

Note that many films are not meant to look exceedingly sharp or vivid and the director may employ all sorts of effects that keep them out of tier 0. Another rating thread that emphasizes director's intent and fidelity to the original version is the Film Reference and Analysis Thread. OPPO will provide an adapter cable to 2 pin to connect to a standard IR block upon request, or make your own:.

The fan does not run most of the time. During playback I never hear it, but I have the player in a cabinet behind doors. If the player has been running a while I hear the fan when the tray is ejected and the cabinet doors are open. It runs for a short time when a new disc begins playing but then goes silent again.

I have my OPPO sitting on top of the cabinet, in the open, just 10 feet away, and I never hear the fan, even after hours of use, except for brief instances when the fan control logic is resetting itself -- e.

With decent ventilation, whether enclosed in a cabinet or out in the open, the fan should be a non-issue for everyone. I have the BDP installed in probably the worst possible ventilation scenario which is sad for an HVAC engineer, but still true -- I keep telling myself it's to provide a test case rather than admitting that I haven't taken the time to improve on my cabinet. I also have three temperature sensors on the player: I can get the fan to run, but it involves ambient temperatures inside the player of around F or F and discharge air temperatures of up to F.

I do not hear the fan, though, even when I open the cabinet door while it is running. Mine sets on top of my Integra combi player and has 5 inches of clearance on top and is open to the sides and back; I never hear the fan and I never notice a heat issue. The Oppo BDP includes a fan. If I didn't tell you that you would likely never know. There simply isn't fan noise during playback. I have my Oppo sitting out in the open about 10 feet from where I sit.

The only time you ever hear the fan is when the fan control logic resets itself briefly, as for example during the loading of a disc.

I kid you not, some of the Beta testers have taken to mounting a mirror behind their Oppo so they can even tell when, if ever, the fan is spinning. I have mine on top of my Onkyo , and I never hear it kick on. I feel fan noise is really a non-issue for most folks.

I have been able to hear my fan come on at times, and once or twice, only during a quiet scene, was able to hear it from my sitting position watching a movie. This was only during 1 or 2 movies in particular, and only during a very quiet scene.

The other times I've heard it was only when a disc was not playing, but perhaps afterwards, when removing the disc when I was up close. There is a 3-way switch inside the battery compartment. Code set 1 is the same as used for the other players. If you use code set 2 or 3 the BDP will not obey the other remotes and its remote will not control the other players. Note that the physical switch setting on the remote must match the Setup value.

See Why did my remote stop working when I changed the code set? Send me your comments. We are sorry you have been experiencing this difficulty. As we suggested, you should be able to confirm the commands from the original remote. This will request 3 to 6 keypresses, and will not require you to learn the entire codeset. To do this, please follow these steps:. If there is a "remote address" you should be able to select or view this on the receiver itself without contacting OPPO. We almost certainly already have the codes in our database and you should not need to provide these.

The easiest way to is to try following the steps provided above. Again, it should only require keypresses. Yes, as an Excel. All three code sets are shown and the last tab has large-scale images of the remote, front and back. The primary benefit to RS control is that it allows the player to send feedback to the device that's controlling it. This would allow you to do things like have the control system dim the lights when a movie starts playing and turn them back up when the movie is paused or stopped, or display current track, elapsed time, etc.

Based on the RS documentation for the DVH, there are also additional commands, like direct access to the various fast forward speeds. These will usually have a remote that uses RF communication with a controller box that then sends out IR, RS, and other types of signals to the equipment being controlled. Most typical universal remotes like the Logitech Harmony don't have support for RS control of devices.

For Blu-ray this limit is mandated by AACS , so the decoder chip maker decided to make the hardware support up to i over component. This means non-encrypted DVD and other media files can be up-converted to i over component, but not p. Yes, although there are restrictions. This is because the decoder chip only outputs the native resolution of the disc in this mode.

Most BDs are p24, and there is no corresponding component output format for p This is what the manual says. The image looks good to me and the picture controls work as expected. This is a difficult case because the same Resolution control is used for both HDMI and component, which you can switch between but which have different capabilities.

These Blu-ray results over component presume that the disc does not have ICT , which as far as I know is not yet being used on Blu-ray. This is the intended operation.

During the beta test period there were "big" firmware updates that reset the settings and erased persistent memory. It's possible this could happen again in the future, so it would be a good idea to note your settings before an upgrade. That is what I do. Usually the player detects the presence of firmware when you insert the USB device. If it doesn't, sometimes cycling power on the player will help.

Note the list of recommended disc burning utilities at the bottom of the page linked there in the section called General instructions on working with ISO image files. Another utility often recommended for burning iso files is ImgBurn. Yes, it is quick and painless if you have high speed internet. I wouldn't recommend it otherwise.

The new firmware is BETA. BETA firmware won't install via the internet due to its risk of instability in performance or installation. The Firmware Notification Setup option is not On. Yes, in this PDF file: I would recommend YCbCr 4: This what the Auto setting gives you anyway and you might as well set it explcitily. Choosing a Color Space.

In theory, when every device in the chain is using 8 bits for all components, there should be no difference between RGB Video Level and the two YCbCr settings. This is chroma upsampled by the hardware decoder to YCbCr 4: These last two conversions can occur in the player, in the display, or in some intermediate box.

In practice I would try all the settings, calibrating for each one separately, to see if any looks better than the others. In the past there have been examples of displays that did not handle certain color spaces settings very well. I would hope this has improved with time. Converting between RGB and YCbCr is simple math and is lossless if the software uses enough bits of precision but the principle of "keep it simple" suggests sending a YCbCr signal to the display is less error-prone.

If the next device has a control for this it too should be set to Automatic i. If RGB is being used, this choice is not relevant. If the SDTV vs. HDTV color space stuff is wrong i. If your next device supports Deep Color then turn that on as well in the player. This will yield YCbCr 4: If the next device supports Deep Color and it appears to be working bug free, then you are done. Continue using YCbCr 4: If you are using YCbCr 4: If it accepts the signal, calibrate the video levels again for YCbCr 4: It makes this all fit by the trick of sending only half the horizontal color resolution: And if, so, it is worth giving that format a try -- what I call "Deep Color for the rest of us"!

This will typically be the case if the next device is engineered primarily for computer use, as with some projectors. Deinterlacing is required for DVD playback. Some extras on Blu-ray may be interlaced, and some main features like concert videos, but most Blu-ray titles are stored in a progressive format that does not need to be deinterlaced.

I have DVDs where changing the default deinterlacing mode can improve playback. An example is the TV series Honey West. For some reason the way this disc is authored makes it difficult for the player to detect and lock on to the correct cadence.

Forcing deinterlacing to Film Bias Mode gives a big improvement in image quality. Since this setting, like most others, can be made while the title is playing, you can quickly see whether or not the changes are an improvement. This applies to DVD, some Blu-ray extras and a few Blu-ray features, but most Blu-ray main features are stored in a progressive format and will not have either problem.

Sharpness is an odd adjustment. Unlike grayscale and color settings, which are the same regardless of distance, with sharpness what you see depends on your seating distance. Distance, visual acuity and display resolution and technology are all contributing factors.

This is apart from the issue of personal preference. There is an audience for "the sharper the better" but too much of a good thing and the image no longer looks like film or reality. Note that some receivers will not accept certain inputs while others are connected, so check that carefully. The manual has specific recommended settings for several configurations:.

If you are connecting to a receiver with 5. If you are connecting to a receiver with a coaxial or optical cable, see:. The Speaker Configuration and Downmix settings are used only for multi-channel analog output, that is: In order to use this feature you must have a receiver or processor that can decode DSD. To switch between the stereo mix and the multi-channel mix of an SACD disc, press the Audio button on the remote. In early firmware it was reported that repeated switching back and forth between the SACD stereo mix and the multi-channel mix with the Audio button could render the playback of a disc unstable.

In the context of an occasional switch the feature works normally. If the playback of a disc becomes unstable, eject the disc and start over. The result is lowered dynamic range and loss of sound information at low volumes. As stated in the manual , the volume control does not apply to digital bitstream audio, although setting volume to 0 will mute all audio. The 2-channel output uses a discrete stereo D-to-A converter. The 2-channel output is always downmixed multi-channel audio, and is independent from all audio settings in the player, with one exception:.

Use PCM in this case. By design this test produces sound only when using a 7. The author of the disc posted this to AVSForum:. We wanted to set it to silence. Regrettably, we should have mentioned this somewhere on the disc. This test should only be used if you have a 7.

For those people who are having troubles with the settings, we noticed some interaction between using the analog outputs and having the Secondary Audio turned on. We're glad people are enjoying the disc and am sorry for any confusion this has caused, but in a way, the trick is doing its job in illuminating when the 7. There are only downmix coefficients which are used to generate the "core". I'm not sure if this is handled on the fly in decoding or if an actual sub-stream is created during encoding.

On the Dolby TrueHD side for 7. I must admit, I am not clear on the permutations that decide if the core plays or if the downmix coefficients are used, but I would hope the core always plays if specified. The new "lossless" audio packing formats for Blu-ray Dolby TrueHD and DTS-HD MA are "lossless" in the sense that what comes out of the decoder is bit-for-bit identical to what went into the encoder in the first place when the studio created that track.

The result of decoding is high-bandwidth, multi-channel LPCM -- the simplest form of digital audio. The bottom line is that if you detect a quality difference in your setup, then you have likely discovered a bug or a user setup error -- either in the OPPO or in your AVR. Letting the OPPO do the decoding also makes it easier to take advantage of "secondary audio mixing" on Blu-ray discs.

All in all, you might as well just let the OPPO do all the decoding and just leave it that way. Which means the user need make no special adjustment in the receiver regardless of which output he is using from the OPPO.

Please note that it is not particularly useful to compare what the OPPO is doing to what other players do, as many other players screw this up in one way or another. Even players from the major "audiophile" manufacturers have been known to ship with LFE level bugs of one form or another. It is mixed in with the main audio so both tracks are audible together. Like BD-Live and excessively complicated menus, it is a marketing-driven Blu-ray feature that no one ever asked for. Yes, for some audio formats.

They show the different results for various formats and outputs when Secondary Audio is off and on. If you are concerned about Secondary Audio reducing your audio quality, do all of the following:. On the lower left of the screen, the normal audio icon is three overlapping circles. When Secondary Audio processing is enabled, the icon changes to a jagged waveform. Some discs are authored in such a way that you must turn features off and on through the disc's menus; not everything can be done with the remote.

Further, the disc's instructions state that U-Control can be toggled with the RED button; this works, but I've found you still get no SAP audio unless you do it with the menus. I've also encountered discs Serenity , for example where PIP and SAP cannot be toggled from the remote; everything has to be done from the disc menu or U-Control widget. Yes, as of firmware May 5 , press and hold the SAP button on the remote to switch Secondary Audio processing on and off. As to why you would want to, see Is audio quality reduced when using Secondary Audio?

This is likely related to your receiver not supporting HDMI repeating functionality. In such situations you will either need to turn on the television, or completely remove the HDMI cable from the back of the receiver to the television, or use digital coaxial or optical for CD-Audio playback.

You should also verify that your display supports p24 signals at multiples of 24hz. Some displays accept a 24hz signal but convert it to 60hz, which reintroduces the motion artifacts.

As it says there, if you force 24hz output and your display does not really accept it, you will get no video. And even though the disc is flakey, the OPPO will switch rapidly between film-based and video-based deinterlacing as necessary so things will look way better than you might be used to from playing such a disc on some other players. That's a transition that does not require a new HDMI handshake. When the resolution is set to Source Direct , the player acts as a transport , outputing the original resolution of the disc content with minimal additional processing.

When set to Source Direct the player does:. Note that your display must be capable of receiving a p24 signal, or you will get no video when playing Blu-ray with Source Direct.

These are the actual file name extensions the player can read. For example, the player will see and display a file called abc. Most of my testing was done with the downloadable divxtest. For more detail, see the results of the divxtest. There is also a comparison of media file test results for several OPPO players. A container is a file, an envelope to hold audio and video data. The audio and video is encoded by a standard codec , a program or format. But the video inside the container must be of a supported video codec or you won't get any video.

The audio inside the container must be of a supported audio codec or you won't get any audio. OPPO is aware of the need, but support for this must come from the decoder chip maker. As an aside, here is an article on creating DVD-A discs from. The chip maker balked at this due to copy protection concerns. Apparently "iso" means "illegal content" to the industry. I don't know why, but presume each container type has it's own API and development for each type has to be prioritized.

Files are shown in their physical ordering on the device, which is usually their creation order. Some mp3 players and other devices exhibit the same non-sorting behavior. Other functions are often requested, but we have no indication that they will ever be added: Netflix and other video service streaming, CD track information.

No, but OPPO sells an optional wireless adapter kit. The kit includes both transmitting and receiving adapters, so you can use it if you have high speed internet but no wireless access point. The documentation is online: The units are "pre-paired" with custom firmware. Digital Living Network Alliance DLNA "is a standard used by manufacturers of consumer electronics to allow entertainment devices within the home to share their content with each other across a home network.

The player only accepts and plays a limited number of file types. The server may offer more types but the player either will not see them, or they will be visible in the browser but not playable. Here are some servers people are using with the BDP If you have any usage notes on these please send me your comments:.

Supports high quality on-demand audio transcoding for a vast number of formats. By-folder navigation is available in the paid version. LaCie Network Space 2. We have specific reports confirming:. Offers folder, artist and album navigation. I had trouble with the configuration until I paid.

There seems to be little support for the product even when you do pay. The online forum is helpful but often has more questions than answers. I use it only for media files on the server. It supports some media feeds PhotoBucket, Handpicked Radio [? The data would have to be presented to the OPPO as a supported file type, which is probably an obstacle. Reencoding data on the fly is possible but probably a big burden on the server. Networking is a big topic, beyond the scope of this FAQ.

If anyone has links to online resources that address just this problem, please send me your comments. You have to have a working network connection between the player and the server. There may be firewall and security issues on your PC.

The server must be looking at the correct network interface. For me, Twonky works without specifying any additional parameters, but I have to startup Mediatomb as:. The OPPO has to be working correctly. DLNA support is still experimental and you may have to try an operation more than once to get it to work. Unofficial hacked firmware and hardware modified by third parties exist but are not discussed in this FAQ.

Using modified hardware or firmware voids your OPPO warranty. Any support must be provided by the third party making the modification. We may remove the mod if necessary for a repair but that is it. See the wiki article on regional lockout. We have no plans selling these units internationally or allowing the end user to adjust any regional controls. The people who own the technology, who write the contracts specifying how you may and may not use their property, will not allow region-free playback.

No one has told me, so I can only speculate. This is an opportunity for them to enforce their rights. It allows multiple devices to mess with each other more effectively. That sounds like Demo Mode. This will resynchronize the remote and the player. A confirmation message will appear on the front panel. When the On-Screen Display is showing, use the Page Up and Page Down buttons to cycle through title and chapter elapsed and remaining times. If you've been changing the remote codes, see Why did my remote stop working when I changed the code set?

Are you using any sort of IR repeater or extender? If so you need to be aware that the player has a multi-path rejection on the IR sensor so if it's receiving multiple signals it may reject them all. If you're using the IR input on the back, the front sensor might need to be covered. Else, it's probably the batteries. The backlit remote seems to use batteries faster than the older remotes. Operation can become intermittent even though the buttons are still lighting up. If you press and hold Enter on an older remote when the BDP tray is ejected it will will resync the player to code set 1, which will be a problem if you were using a different code set.

Or resync with the BDP remote if it happens. Why does it behave this way? It could not be otherwise, given you want a code set 1 as an option for compatibility with older players, and b the ability to resync the code set from the remote. The requirement to have the tray ejected when resyncing was added to make this problem less likely.

See the manual Media File Playback:. NTFS and other file systems are not supported. Most USB thumbs drives, portable hard disk drives and card readers conform to this device class.

It is reported that USB-powered 2. As OPPO advises, use external power. Settings are saved when the player is powered down, not when the setting changes are made. If you have some sort of irregular shutdown, for example if the player locks up, the recent setting changes may not be saved. This erases any custom settings you have applied, so note them down first.

Reapply any custom settings to Setup leave BD-Live off for now. Are you entirely on your own or do you get any help from the studio, a chip partner, or the BDA? What are the causes of the issues? Are the studios adding new features or is the existing spec too sloppy?

It's not just a matter of DRM updates, is it? There could be many causes. Most of the issues are related to Java and copyright protection. The BD-Java specs are very complicated and a lot of details are not well defined.

The Java implementation middleware in different players can come from different sources and each has some variation. The disc authoring tools may use a Java implementation and libraries from different vendors. The copyright protection mechanisms used by the studios are updated from time to time, and the players must be updated to support them. Is OPPO in a more difficult position than other vendors in this regard?

Do bigger companies get better support? Is this a problem for the BR industry, and is anyone doing anything to address it? This is indeed a problem for the Blu-ray industry. Since the release of the BDP, we have made some really good progress in placing the BDP into the studios and disc authoring houses so it becomes a part of the disc QA process. We and our chip maker are also involved in testing newly pressed discs although due to confidentiality and non-disclosure agreements I cannot provide any details on this front.

This type of cooperation will allow us to fix issues earlier on, or allow the studios to re-author the discs before mass production. Overall, we believe disc compatibility issues will be gradually reduced, and most issues will be resolved before the users get the discs.

On the other hand, due to the complexity of the Blu-ray standard and the evolving nature of the business, all player brands and models may still encounter compatibility issues from time to time.

Should that happen we believe that we will be the quickest to respond with firmware updates. UPnP is intended primarily for residential networks without enterprise class devices. As far as I understand from these posts 1 ; 2 , DLNA is a subset and restricted form of the UPnP standard and specifies less options and more strict formats.

Many features are optional. There is no baseline set of media formats that devices have to support. Video format support is a problem for pretty much all media devices. Utterly extraordinary readings of the standard were common. Minimalist implementations were the rule rather than the exception. The DLNA standards organization provided standardized tests suites that certified devices had to pass. But there is no requirement that they MUST be compatible. So surprise surprise more often than not, they are not compatible.

DLNA also had its problems. All at huge expense. All of which in turn precluded any sensible open-source DLNA implementation. So when it was all said and done, alhtough interoperability had improved dramatically, it still wasn't that great. UPnP provides all the basic control functions: Security and Digital Rights Management 3. Better specification of media files codecs, encryption, bit rate, etc.

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