View Full Version : Will maemo 5 bea able to play all kinds of video formats including HD?
sachin007
08-14-2009, 01:05 PM
My biggest gripe about the tablets until now are that they fail miserably at playing high quality videos. Considering that maemo 5 has bumped up specs can it handle HD video?
Thanks
I don't know about 'bumped up specs' on Maemo 5, but Cortex A8 + PowerVR SGX like on iPhone 3GS can record & playback 720p h.264 stream just fine.
GeneralAntilles
08-14-2009, 01:53 PM
h.264 at D1 should work just fine on the DSP. The have it decoding 720p on the Beagle with NEON.
attila77
08-14-2009, 02:19 PM
Another question is do you actually NEED hd playback, considering the screen resolution. I'm not ever sure about the convenience factor, as I learned via QTE that with transparent conversion you can reduce space requirements, increase copy speed and retain maximum (visible) quality at the same time.
ColdFusion
08-14-2009, 02:27 PM
Another question is do you actually NEED hd playback, considering the screen resolution. I'm not ever sure about the convenience factor, as I learned via QTE that with transparent conversion you can reduce space requirements, increase copy speed and retain maximum (visible) quality at the same time.
And battery too i guess.
I think the primary use for this is for external playback. Power shouldn't be a problem too, since it most likely will be used while being tethered and close to a power plug.
ColdFusion
08-14-2009, 02:44 PM
Yes, I admit that makes sense as a usecase.
Here's a video of 720p Video on OMAP3 Platform
http://www.youtube.com/watch?v=HRI0NUaWko8
http://www.youtube.com/watch?v=ERK6ETRytFM
sachin007
08-14-2009, 02:53 PM
Yes, I admit that makes sense as a usecase.
Here's a video of 720p Video on OMAP3 Platform
http://www.youtube.com/watch?v=HRI0NUaWko8
http://www.youtube.com/watch?v=ERK6ETRytFM
I wish we can play all those formats including divx, h.264, wmvhd, mpeg2 and mpeg 4
attila77
08-14-2009, 03:56 PM
I think the primary use for this is for external playback. Power shouldn't be a problem too, since it most likely will be used while being tethered and close to a power plug.
Silly question, but... any ideas what is the actual TV-out resolution that the RX51 is likely to be able to produce ?
lemmyslender
08-14-2009, 04:00 PM
If it's using RCA jacks as pictured, it would be limited to 480i, however if there is another adapter available (hdmi, component) it could be higher.
@attila77: no idea.
I'd imagine it should be designed to at least output 1080p.
mrojas
08-14-2009, 04:08 PM
AFAIK the RX-51 doesn't have a native HDMI output, could it use some kind of adapter?
sjgadsby
08-14-2009, 04:20 PM
AFAIK the RX-51 doesn't have a native HDMI output, could it use some kind of adapter?
The device hasn't been announced yet. We don't know for certain what kind of video output it has. The leaked images show a composite video cable, and the line drawings in the FCC filings might provide some hints as to what the connector looks like, but the question is still far from resolved.
If the RX-51 provides composite only, then interlaced SD video will be the limit. Your only HDMI adapter will be a bulky, and rather expensive, scaler.
If the RX-51 offers something better--component, RGB, Mini-DVI, Mini DisplayPort, Mini-HDMI, 3G-SDI--then you'll be able to explore the limits of the device's ability to push pixels to HD displays.
nikolajhendel
08-14-2009, 05:44 PM
Another question is do you actually NEED hd playback, considering the screen resolution. I'm not ever sure about the convenience factor, as I learned via QTE that with transparent conversion you can reduce space requirements, increase copy speed and retain maximum (visible) quality at the same time.
I don't follow - what's QTE transparent conversion. Is the idea that drag/dropping a video transcodes it instantaneously to a maemo5 "perfect fit" - sounds cool but not feasible.
Even though the device only has 800x480 - the attraction for me is to be able to copy over a video, without having to recode (as long as we stay in the 720p region).
attila77
08-14-2009, 06:11 PM
I don't follow - what's QTE transparent conversion. Is the idea that drag/dropping a video transcodes it instantaneously to a maemo5 "perfect fit" - sounds cool but not feasible.
Err. Why ? I did that a couple of month ago , check http://www.youtube.com/watch?v=QBJM0o7j4Rw towards the end (4:20), it's a bit of an overkill with the configurable front-end, but nonetheless, you do get plain and simple drag-and-drop action to get your movies in the desired format on the tablet. Doing it fully transparently (as in, filesystem level) is also possible (at least on Linux, no idea about Win/MacOS), but that would require more effort/time.
For some more details, see http://talk.maemo.org/showthread.php?t=28212 (development got sidetracked with all the summer activities, but definitely not abandoned).
Even though the device only has 800x480 - the attraction for me is to be able to copy over a video, without having to recode (as long as we stay in the 720p region).
That's what I'm saying. If recoding does NOT incur an additional step (effort) and you likely won't see any visual difference on the output (screen or likely even tv-out), than why is that a question at all ?
Here's a confirmation that Cortex A8 + PowerVR SGX can play 1080p stream with no problem:
http://www.engadget.com/2009/08/20/iphone-3gs-totally-capable-of-1080p-video-playback/
well ok, they show some glitchy videos there too, but I assume it's just codec incompatibilities. anyhoo, technically it's powerful enough decode and rescale the video stream on the fly.
sachin007
08-21-2009, 01:45 AM
Here's a confirmation that Cortex A8 + PowerVR SGX can play 1080p stream with no problem:
http://www.engadget.com/2009/08/20/iphone-3gs-totally-capable-of-1080p-video-playback/
well ok, they show some glitchy videos there too, but I assume it's just codec incompatibilities. anyhoo, technically it's powerful enough decode and rescale the video stream on the fly.
That post clearly shows that engadget is a apple fan boy... in the first place the iphone cannot play HD video.... why have that title and show that it cant?
On the other hand sachin, you shouldn't let being an apple hater cloud your judgement and senses. They've managed to play most 1080p trailers, but found 2 specific problematic files: the avatar trailer which shutdown the audio driver and a 720p file shot with their dslr. So in the video they only showed one sample of each.
sachin007
08-21-2009, 02:23 AM
@eldarmurtazin Can the RX-51 play all high bitrate videos without converting? Did you use a software to play other codecs?
@rajuvamsi007 yes, it can, but not sure whatwill be in the final version
Great.... no more video conversions :D
attila77
08-21-2009, 04:17 AM
Guys, that's no moon... It's not playing back 1080p - it just manages to get out info from a 1080p stream. That's a huge difference. With enough hackery we could probably make even the N810 'play 1080p streams', but the video displayed would have nothing to do with HD resolutions or quality.
I just hope there's better support for playing DVDs (with DRM) over network. I don't want to rip+convert it and I don't want to struggle with VLC to do it. My Popcorn Hour does this much better.
@volt: good luck with finding enough juice to make that practical.
@volt: good luck with finding enough juice to make that practical.
Funny, that's the same they say on the Popcorn Hour forums about running a decent web browser. It is made for streaming, and it streams very well considering the miniscule hardware platform. I have played directly over the net from a shared DVD, while doing the decrypting on the PCH side. As far as I can tell, the Popcorn Hour A-100 has a Sigma SMP8635 chip running on 300 Mhz. Decrypting DVDs has been done since the first DVD-roms were fitted into 200 Mhz Pentium MMXs. A Cortex CPU doesn't seem that weak compared to the PCH.
And all other arguments aside, there are no reasons why there could not be a PC side streaming server that does exactly what the VLC does, but optimized for the Maemo device. I have totally failed to get VLC streaming anything stable. Such software does exist for the PCH btw, and their community isn't that much bigger than this one.
It's not only a question about juice. It's a question about technology. Even today the N810 can play rips.
So, I don't need to find any juice, I need to find software :B
Funny, that's the same they say on the Popcorn Hour forums about running a decent web browser. It is made for streaming, and it streams very well considering the miniscule hardware platform. It can also play directly from DVD, while doing the decrypting on the PCH side. As far as I can tell, it has a Sigma SMP8635 chip running on 300 Mhz. Decrypting DVDs has been done since the first DVD-roms were fitted into 200 Mhz Pentium MMXs. A Cortex CPU doesn't seem that weak compared to the PCH.
And all other arguments aside, there are no reasons why there could not be a PC side streaming server that does exactly what the VLC does, but optimized for the Maemo device. I have totally failed to get VLC streaming anything stable. Such software does exist for the PCH btw, and their community isn't that much bigger than this one.
It's not only a question about juice. It's a question about technology. Even today the N810 can play rips.
So, I don't need to find any juice, I need to find software :B
Oh, the RX-51 would have no problem playing back 1080p video.
By 'juice' I meant power, portable power specifically. With the WiFi + decent screen brightness, cpu+gpu working overtime to decode and do any post processing job, I'm guessing it can do it for 3 to 4 hours tops.
PS: I have a PCH too. Very good device for the price, sucky UI though. I end up replacing it with XMBC on a mini ITX.
Oh, then I misunderstood you.
Well, two of the places I'd use it to watch video is in bed, and, ironically, in front of the TV. The TV is set to "Animal Planet" a tad too much for my liking.
So, yes, I don't know if it could display 3 hours of video on the train, but the ability to do so at all would be progress IMO.
mrojas
08-27-2009, 09:32 PM
The device hasn't been announced yet. We don't know for certain what kind of video output it has. The leaked images show a composite video cable, and the line drawings in the FCC filings might provide some hints as to what the connector looks like, but the question is still far from resolved.
If the RX-51 provides composite only, then interlaced SD video will be the limit. Your only HDMI adapter will be a bulky, and rather expensive, scaler.
If the RX-51 offers something better--component, RGB, Mini-DVI, Mini DisplayPort, Mini-HDMI, 3G-SDI--then you'll be able to explore the limits of the device's ability to push pixels to HD displays.
SOOOOOOOOOOOOO now that we know it doesn't have a native HDMI output, I wonder if the USB port could somehow be connected to an HDMI conversor (I have no idea if the bandwith required for HD video is there).
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