Prioritize hardware decoder for playbin2
Jim
restlessmindsstudio at gmail.com
Thu Feb 21 10:57:13 PST 2013
Hi Soeren,
Thanks for your time. I went ahead and tried setting the playbin2 flags
property to 0x163 and noticed a big difference in CPU usage, it looks like
it is now using the VPU based on the very low CPU usage. But after about 10
seconds the video started getting choppy and froze. So I changed the flags
to 0x063 (excluded the GST_PLAY_FLAG_BUFFERING flag) and now the video is
playing smoothly and the CPU usage is still low.
It's odd that disabling buffering would be helpful. Does that make any
sense? I do see that the default flags for playbin2 are:
"soft-volume+text+audio+video" (0x017) so by default buffering is not
enabled.
I think this solved my problem, thanks again!
Jim
-----Original Message-----
From:
gstreamer-devel-bounces+restlessmindsstudio=gmail.com at lists.freedesktop.org
[mailto:gstreamer-devel-bounces+restlessmindsstudio=gmail.com at lists.freedesk
top.org] On Behalf Of Soeren Grunewald
Sent: Thursday, February 21, 2013 8:55 AM
To: gstreamer-devel at lists.freedesktop.org
Subject: Re: Prioritize hardware decoder for playbin2
Hi Jim,
You can try and play with the playbin2 flags [1] e.g. set them to 0x163.
I remember that this solves my problem when I tried to use the openmax
plug-ins.
You can also try to use GST_DEBUG_DUMP_DOT_DIR [2] to visualize you
pipeline. This also might help you to figure out what went wrong.
--
Regards,
Soeren
[1]
http://gstreamer.freedesktop.org/data/doc/gstreamer/0.10.36/gst-plugins-base
-plugins/html/gst-plugins-base-plugins-playbin2.html#GstPlayFlags
[2] http://gstreamer.freedesktop.org/wiki/DumpingPipelineGraphs
On 02/19/2013 07:07 PM, Jim wrote:
> Hi Tim,
> Here's the output of gst-inspect for the hardware decoder. I missed it
> before but I now see it has a rank of GST_RANK_PRIMARY+1, which I
> would assume is high enough to be selected, but from what you said, it
> sounds like there's more to it than just the rank.
>
> Factory Details:
> Long name: VPU-based video decoder
> Class: Codec/Decoder/Video
> Description: Decode compressed video to raw data by using VPU
> Author(s): Multimedia Team <shmmmw at freescale.com>
> Rank: primary + 1 (257)
>
> Plugin Details:
> Name: vpu.imx
> Description: VPU-based video codec
> Filename: /usr/lib/gstreamer-0.10/libmfw_vpu.so
> Version: 3.0.1
> License: LGPL
> Source module: gst-fsl-plugins
> Binary package: Freescle Gstreamer Multimedia Plugins
> Origin URL: http://www.freescale.com
>
> GObject
> +----GstObject
> +----GstElement
> +----GstVpuDec
>
> Pad Templates:
> SINK template: 'sink'
> Availability: Always
> Capabilities:
> video/mpeg
> mpegversion: 4
> video/x-h264
> video/x-h263
> video/mpeg
> systemstream: false
> mpegversion: { 1, 2 }
> video/x-wmv
> wmvversion: 3
> format: WVC1
> video/x-wmv
> wmvversion: 3
> video/x-xvid
> video/x-vp8
> image/jpeg
>
> SRC template: 'src'
> Availability: Always
> Capabilities:
> video/x-raw-yuv
> format: NV12
> video/x-raw-yuv
> format: I420
> video/x-raw-yuv
> format: YV12
> video/x-raw-yuv
> format: TNVP
> video/x-raw-yuv
> format: TNVF
>
>
> Element Flags:
> no flags set
>
> Element Implementation:
> Has change_state() function: gst_vpudec_state_change
> Has custom save_thyself() function: gst_element_save_thyself
> Has custom restore_thyself() function: gst_element_restore_thyself
>
> Element has no clocking capabilities.
> Element has no indexing capabilities.
> Element has no URI handling capabilities.
>
> Pads:
> SRC: 'src'
> Implementation:
> Has custom eventfunc(): gst_vpudec_src_event
> Has custom queryfunc(): gst_pad_query_default
> Has custom iterintlinkfunc():
gst_pad_iterate_internal_links_default
> Has getcapsfunc(): gst_pad_get_fixed_caps_func
> Has acceptcapsfunc(): gst_pad_acceptcaps_default
> Pad Template: 'src'
> SINK: 'sink'
> Implementation:
> Has chainfunc(): gst_vpudec_chain
> Has custom eventfunc(): gst_vpudec_sink_event
> Has custom queryfunc(): gst_pad_query_default
> Has custom iterintlinkfunc():
gst_pad_iterate_internal_links_default
> Has setcapsfunc(): gst_vpudec_setcaps
> Has acceptcapsfunc(): gst_pad_acceptcaps_default
> Pad Template: 'sink'
>
> Element Properties:
> name : The name of the object
> flags: readable, writable
> String. Default: "vpudec0"
> low-latency : set low latency mode enable/disable for streaming
> case
> flags: readable, writable
> Boolean. Default: false
> framerate-nu : set framerate numerator
> flags: readable, writable
> Integer. Range: 1 - 2147483647 Default: 30
> framerate-de : set framerate denominator
> flags: readable, writable
> Integer. Range: 1 - 2147483647 Default: 1
> framedrop : enable adaptive frame drop for smoothly playback
> flags: readable, writable
> Boolean. Default: true
> frame-plus : set number of addtional frames for smoothly
playback
> flags: readable, writable
> Integer. Range: 1 - 2147483647 Default: 6
> output-format : set raw format for output
> flags: readable, writable
> Enum "vpudec_outputformat" Default: 0, "auto"
> (0): auto - auto
> (1): i420 - I420
> (2): yv12 - YV12
> (3): nv12 - NV12
> (4): tile - tiled format
> (5): tilefield - tiled field format
> framedrop-level-mask: set enable mask for drop policy 0x100: drop
> B/P frame; 0x200: drop B frame; 0xff mask of frame not display
> flags: readable, writable
> Unsigned Integer. Range: 0 - 1023 Default: 1023
> experimental-tsm : enable/disable experimental timestamp algorithm
> flags: readable, writable
> Boolean. Default: true
> profile : enable profile on vpudec
> flags: readable, writable
> Boolean. Default: false
>
>
> Thanks,
> Jim
>
> -----Original Message-----
> From:
> gstreamer-devel-bounces+restlessmindsstudio=gmail.com at lists.freedeskto
> gstreamer-devel-bounces+p.org
> [mailto:gstreamer-devel-bounces+restlessmindsstudio=gmail.com at lists.fr
> eedesk top.org] On Behalf Of Tim-Philipp Müller
> Sent: Tuesday, February 19, 2013 10:49 AM
> To: gstreamer-devel at lists.freedesktop.org
> Subject: Re: Prioritize hardware decoder for playbin2
>
> On Tue, 2013-02-19 at 10:39 -0700, Jim wrote:
>
> Hi,
>
>> Thanks for the reply. I was able to set the rank using the functions
>> you listed. But even after setting the rank to GST_RANK_PRIMARY + 2,
>> playbin2 is still not using the hardware decoder. I guess I'll have
>> to keep poking around.
>
> There are more things that need to be set right.
>
> The element factory class needs to have the right tags in it, and the
> template caps need to be correct.
>
> Perhaps you could paste the output of gst-inspect $yourdecoder ?
> (removing any specifics/names from the output if necessary).
>
> Cheers
> -Tim
>
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