Re: [gentoo-user] intel HD graphics 4000 and viewing DVDs

[Jackson <wjiecheng@gmail.com>]

[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain; charset=gb18030; format=flowed, Size: 4133 bytes --]

On 12/02/2012 03:02 AM, Allan Gottlieb wrote:
> On Sat, Dec 01 2012, Florian Philipp wrote:
>
>> Am 28.07.2012 10:22, schrieb Florian Philipp:
>>> Am 27.07.2012 22:57, schrieb Michael Mol:
>>>> On Fri, Jul 27, 2012 at 4:39 PM, Florian Philipp
>>>> <lists@binarywings.net>  wrote:
>>>>> Am 27.07.2012 22:22, schrieb Michael Mol:
>>>>>> On Fri, Jul 27, 2012 at 4:10 PM, Allan Gottlieb<gottlieb@nyu.edu>  wrote:
>>>>>>> I am getting a new laptop. (likely dell 6430).
>>>>>>> The two graphics options are intel HD 4000 and nvidia NVS 5200M.
>>>>>>> Dell is as expected suggesting the 5200M.
>>>>>>>
>>>>>>> I do not need 3D or fast response.  Dell hinted that DVDs might not play
>>>>>>> with the intel HD 4000.  This seems weird to me as the 4000 is supposed
>>>>>>> to be a big improvement over the 3000 and I can't believe dell or others
>>>>>>> would have sold laptops that can't play dvds
>>>>>>>
>>>>>>> Any comments or experiences?
>>>>>> My Duron 750MHz was able to decode DVDs in realtime. After that, all
>>>>>> you're doing is blitting (or using xv) the frames to the screen. I
>>>>>> would be absolutely shocked if the Intel HD 4000 GPU couldn't handle
>>>>>> that basic of a 2D acceleration function.
>>>>>>
>>>>>> Now, DVDs use MPEG2. Blu-Ray uses h.264, which is a much harder beast
>>>>>> to decode in realtime. It's possible the HD 4000 GPU can't handle
>>>>>> hardware decode of h.264, but I don't know. I've never looked into it.
>>>>>> (Software decode of 1080p h.264 on my Phenom 9650 worked somewhat, but
>>>>>> highly active scenes would cause frame drops.)
>>>>>>
>>>>> I've experienced issues playing DVDs on fullscreen with the OSS radeon
>>>>> driver. Therefore I'm cautious of assumptions that something works
>>>>> simply because the input is easy to decode. Upscaling to large displays
>>>>> with high resolutions can be an issue.
>>>>>
>>>>> I'm not saying the Intel driver cannot handle it. I'm just saying you
>>>>> should try it or look for reports.
>>>> How high is 'high' resolution? I was upscaling to 1600x1200 using an a
>>>> Radeon 9600; that card would now be almost ten years old. A bit later,
>>>> I did the same on a 2.4GHz Pentium 4 using an i845-based Intel
>>>> graphics card. Here's the line from lspci, as run in May of 2007:
>>>>
>>>> 00:02.0 VGA compatible controller: Intel Corporation
>>>> 82845G/GL[Brookdale-G]/GE Chipset Integrated Graphics Device (rev 01)
>>>>
>>>> Hardware scaling a 2D image is one of the most trivial
>>>> hardware-accelerated options GPUs perform. If someone had difficulties
>>>> upscaling a 480p (roughly what DVDs are) to 1080p at 24 or 33fps, I
>>>> would be very highly suspicious of a software misconfiguration. That
>>>> kind of scaling should even be comfortably doable in software on any
>>>> modern x86-derived processor. (With the plausible exclusion of the
>>>> Atom CPU)
>>>>
>>> 1920x1080, on-board Radeon HD 4250. I haven't diagnosed it further
>>> (except of playing around with mplayer2 options) as it was easier to use
>>> the closed source driver.
>>>
>>> Regards,
>>> Florian Philipp
>>
>> I realize this thread is pretty stale but since I talked bullshit and
>> just now realized it, I want to correct myself:
>>
>> Since updating the kernel to 3.5 forced me to update the X server beyond
>> 1.11 which in turn forced me to update ati-drivers to a version that no
>> longer supported my Radeon HD 4250, I had to look into my issues with
>> the open source driver.
>>
>> It turns out, my problems had two reasons:
>> - I didn't enable KMS and DRM for radeon in the kernel
>> - I didn't have x11-drivers/radeon-ucode installed
>>
>> Both resulted in a fully functioning X server that
>> - could run glxgears just fine
>> - could (with some tuning) render videos in DVD quality with opengl output
>> - was too slow for videos in any higher resolution
>>
>> Regards,
>> Florian Philipp
> Thanks for the response.  I should say that I have indeed purchased the
> laptop with intel graphics and it works fine with DVDs.
>
> allan
>
>

My laptop HP g4-1057tu of HD 3000 GPU can handle hardware decode of 720P easily with vaapi-mplayer¡«¡«¡«¡«