Re: 回复： low performance of gst plugin "androidmedia" with hardware decoder

[Andoni Morales]

2013/9/4 Andoni Morales <ylatuya at gmail.com>

>
>
>
> 2013/9/4 jojo <rjiejie at gmail.com>
>
>>  Hi,
>>
>> Yes, i am sure the androidmedia plugin is working in my testing,
>>
>> but i make a mistake, i am testing again in 1080P case, the CS(NV12 ->
>> RGBx) operation
>>
>> costs about 70ms average time per frame …. it is too much, i use the
>> ffmpegcolorspace plugin to do that, it's the limit of performance in my
>> case  :(
>>
>> is there acceleration API about for CS operation in android ? or how to
>> use the YUV format bitmap to display ?
>>
>> i think about this function is a standard module in HW/chip.
>>
>
> Most colorspace operations are handled by liborc, and it might be possible
> that since we don't build for neon it's taking a slower path.
>

Sorry, that's for 1.0 and not 0.10

Andoni

>
> Cheers,
> Andoni
>
>>
>> Thanks,
>>
>> - Jojo
>>
>> 在 2013年8月30日星期五，下午3:37，Sebastian Dröge 写道：
>>
>> On Do, 2013-08-29 at 16:10 +0800, jojo wrote:
>>
>> Hi,
>> I use plugin "androidmedia" to decode video in android platform with
>> AVC HW decoder,
>>
>>
>> my device is: IMX6Q-SDB
>>
>>
>> my pipe line is:
>>
>>
>> video pipeline: appsrc is-live=true do-timestamp=true
>> caps="video/x-h264, width=1920, height=800" name="appsrc" !
>> decodebin2 ! queue ! ffmpegcolorspace ! appsink caps="video/x-raw-rgb,
>> bpp = (int) 32, depth = (int) 24, endianness = (int) BIG_ENDIAN,
>> red_mask = (int) 0xFF000000, green_mask = (int) 0x00FF0000, blue_mask
>> = (int) 0x0000FF00, width = (int) [ 1, max ], height = (int) [ 1, max
>> ], framerate = (fraction) [ 0, max ]" name="appsink"
>>
>>
>>
>>
>> I collect time in "GstAppSinkCallbacks.new_buffer",
>>
>>
>> in 1080P at 30FPS local case,
>>
>>
>> the average decoding time is 50 ms,
>>
>>
>> if i remove the plugin "ffmpegcolorspace" from pipe line, it costs
>> about 47 ms also, why ?
>>
>>
>> i think the CS convert operation should take much more then 2 ms….
>>
>> someone have performance data for this plugin ?
>>
>>
>> and what's the best configuration about for this plugin ?
>>
>>
>> Do some profiling to see which step exactly takes so much time. Also how
>> do you measure this 50ms/47ms? Having the color format conversion to RGB
>> take just 3ms compared to everything else seems quite low.
>>
>> Are you sure that the androidmedia plugin is actually used in decodebin
>> here? If it is, another step that can take some time is that it
>> currently copies every frame once... but if the color format conversion
>> just need 3ms, the copying should take even less than that.
>> _______________________________________________
>> gstreamer-android mailing list
>> gstreamer-android at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-android
>>
>>
>>
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>>
>>
>
>
> --
> Andoni Morales Alastruey
>
> LongoMatch:The Digital Coach
> http://www.longomatch.ylatuya.es
>



-- 
Andoni Morales Alastruey

LongoMatch:The Digital Coach
http://www.longomatch.ylatuya.es
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