Raspi 4: omxdec to EGLImage decoding

[Nicolas Dufresne]

Le jeudi 01 août 2019 à 09:47 +0200, Gert Glass a écrit :
> Hi,
> 
> I'm trying to port my application from the Raspberry Pi 3 (raspbian
> jesse, gst 1.10.4) to the recently introduced Pi 4 (raspbian buster, gst
> 1.14.4).

On RPi 4 the preferred decoder is v4l2videodec.

> 
> The gst-launch equivalent of my apps pipeline is something like this:
> 
>   filesrc ... ! h264parse ! omxh264dec ! glupload ! glimagesink
> 
> Note that my app explictly needs the decoded frames rendered to EGLImages.
> 
> For some reason this stopped working with the new setup, I am not yet
> sure if this is related to drivers or changes in gstreamer itself, I now
> get the following non-helpful errors:
> 
> ERROR                    omx gstomx.c:1154:gst_omx_component_set_parameter:<omxh264dec-omxh264dec0> Set video_decode parameter at index 0x02000001: Bad parameter (0x80001005)
> ERROR                    omx gstomx.c:1333:gst_omx_port_update_port_definition:<omxh264dec-omxh264dec0> Updated video_decode port 130 definition: Bad parameter (0x80001005)
> WARN            videodecoder gstvideodecoder.c:732:gst_video_decoder_setcaps:<omxh264dec-omxh264dec0> Subclass refused caps
> ERROR                    omx gstomx.c:1154:gst_omx_component_set_parameter:<omxh264dec-omxh264dec0> Set video_decode parameter at index 0x02000001: Bad parameter (0x80001005)
> ERROR                    omx gstomx.c:1333:gst_omx_port_update_port_definition:<omxh264dec-omxh264dec0> Updated video_decode port 130 definition: Bad parameter (0x80001005)
> WARN            videodecoder gstvideodecoder.c:732:gst_video_decoder_setcaps:<omxh264dec-omxh264dec0> Subclass refused caps
> ERROR                    omx gstomx.c:1154:gst_omx_component_set_parameter:<omxh264dec-omxh264dec0> Set video_decode parameter at index 0x02000001: Bad parameter (0x80001005)
> ERROR                    omx gstomx.c:1333:gst_omx_port_update_port_definition:<omxh264dec-omxh264dec0> Updated video_decode port 130 definition: Bad parameter (0x80001005)
> WARN            videodecoder gstvideodecoder.c:732:gst_video_decoder_setcaps:<omxh264dec-omxh264dec0> Subclass refused caps
> ERROR                    omx gstomx.c:1154:gst_omx_component_set_parameter:<omxh264dec-omxh264dec0> Set video_decode parameter at index 0x02000001: Bad parameter (0x80001005)
> ERROR                    omx gstomx.c:1333:gst_omx_port_update_port_definition:<omxh264dec-omxh264dec0> Updated video_decode port 130 definition: Bad parameter (0x80001005)
> WARN            videodecoder gstvideodecoder.c:732:gst_video_decoder_setcaps:<omxh264dec-omxh264dec0> Subclass refused caps
> WARN               baseparse gstbaseparse.c:3611:gst_base_parse_loop:<h264parse0> error: Internal data stream error.
> WARN               baseparse gstbaseparse.c:3611:gst_base_parse_loop:<h264parse0> error: streaming stopped, reason not-negotiated (-4)
> 
> I have found that the v4l2h264dec seems to be able to create a similar
> pipeline, the following now works:
>   
>   filesrc ... ! h264parse ! v4l2h264dec ! glupload ! glimagesink
> 
> My remaining problem is that the v4l2h264dec/glupload pair do not use EGLImages from the 
> GstGLMemoryEGLAllocator, but instead uses the GstGLMemoryAllocator - I assume these are
> GL textures instead of EGLImages.
> 
> I noticed gstupload.c has significatly changed from 1.10 to 1.14, but there still seems to be
> a path available doing GST_GL_HAVE_PLATFORM_EGL.
> 
> I would be much obliged if someone could answer my questions:
> 
> - Is omxdec still supposed to be functional on the rpi4, and if so, what can be the cause of
>   the above erros?
> 
> - If omxdec is not the right way to go, should I megrate to v4l2dec, and if so, how do I get it
>   to use EGLImage buffers?
> 
> Thank you,
> 
> Gert
> 
> 
> _______________________________________________
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> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
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