On 30.06.20 14:59, Ezequiel Garcia wrote: > Hi Martin, > > On Tue, 2020-06-30 at 13:16 +0200, Martin Kepplinger wrote: >> Hi Ezequiel, >> >> On the Librem 5 (imx8mq) I try to decode a (h264) full hd video file >> using the VPU. >> >> I'm running the following tree that doesn't change much, but adds the >> VPU dts description: >> https://source.puri.sm/martin.kepplinger/linux-next/-/commits/5.8-rc3/librem5___vpu >> (output of "v4l-ctl --all" at the bottom). >> > > OK, this means the VPU is enabled with the Hantro driver, so far so good. > >> >> I now run your version of ffmpeg: >> https://gitlab.collabora.com/ezequiel/ffmpeg/-/commits/stateless-mpeg2-vp8-h264-v4 >> (with minor build fixes) but simply doing "ffplay <file>" seems like not >> using /dev/video0 >> >> Is this supposed to work? If so, do I need to know anything about ffmpeg >> to be able to test this? How do you verify that the v4l2 mem2mem device >> (vpu) is being used? >> > > Not sure what state the branch is on, and also IIRC you should use that together > with mpv for proper zero-copy operation. > > I think the libre elec community can help you with that, as they maintain > proper ffmpeg/mpv branches. thanks for the hint. > > Do you need this to work with ffmpeg, or is GStreamer also OK? gstreamer would be equally fine (or easier as I've used that before) for me. Last time I checked I think I'd have to build many more libraries from source in order to test though. That's the only reason why I've tried ffmpeg. > > Thanks, > Ezequiel > >> thanks a lot, >> martin >> >> >> >> purism@pureos:~/ffmpeg_sources/ffmpeg$ v4l2-ctl --all >> Driver Info: >> Driver name : hantro-vpu >> Card type : nxp,imx8mq-vpu-dec >> Bus info : platform: hantro-vpu >> Driver version : 5.8.0 >> Capabilities : 0x84204000 >> Video Memory-to-Memory Multiplanar >> Streaming >> Extended Pix Format >> Device Capabilities >> Device Caps : 0x04204000 >> Video Memory-to-Memory Multiplanar >> Streaming >> Extended Pix Format >> Media Driver Info: >> Driver name : hantro-vpu >> Model : hantro-vpu >> Serial : >> Bus info : platform: hantro-vpu >> Media version : 5.8.0 >> Hardware revision: 0x00000000 (0) >> Driver version : 5.8.0 >> Interface Info: >> ID : 0x0300000c >> Type : V4L Video >> Entity Info: >> ID : 0x00000001 (1) >> Name : nxp,imx8mq-vpu-dec-source >> Function : V4L2 I/O >> Pad 0x01000002 : 0: Source >> Link 0x02000008: to remote pad 0x1000004 of entity >> 'nxp,imx8mq-vpu-dec-proc': Data, Enabled, Immutable >> Priority: 2 >> Format Video Capture Multiplanar: >> Width/Height : 48/48 >> Pixel Format : 'NV12' (Y/CbCr 4:2:0) >> Field : None >> Number of planes : 1 >> Flags : >> Colorspace : JPEG >> Transfer Function : Default >> YCbCr/HSV Encoding: Default >> Quantization : Default >> Plane 0 : >> Bytes per Line : 48 >> Size Image : 3456 >> Format Video Output Multiplanar: >> Width/Height : 48/48 >> Pixel Format : 'MG2S' (MPEG-2 Parsed Slice Data) >> Field : None >> Number of planes : 1 >> Flags : >> Colorspace : JPEG >> Transfer Function : Default >> YCbCr/HSV Encoding: Default >> Quantization : Default >> Plane 0 : >> Bytes per Line : 0 >> Size Image : 4608 >> >> Codec Controls >> >> mpeg_2_slice_parameters 0x009909fa (unknown): type=103 >> flags=has-payload >> mpeg_2_quantization_matrices 0x009909fb (unknown): type=104 >> flags=has-payload >> h264_profile 0x00990a6b (menu) : min=0 max=4 >> default=2 value=2 >> h264_sequence_parameter_set 0x00990ce8 (unknown): type=110 >> flags=has-payload >> h264_picture_parameter_set 0x00990ce9 (unknown): type=111 >> flags=has-payload >> h264_scaling_matrix 0x00990cea (unknown): type=112 >> flags=has-payload >> h264_slice_parameters 0x00990ceb (unknown): type=113 >> flags=has-payload >> h264_decode_parameters 0x00990cec (unknown): type=114 >> flags=has-payload >> h264_decode_mode 0x00990ced (menu) : min=1 max=1 >> default=1 value=1 >> h264_start_code 0x00990cee (menu) : min=1 max=1 >> default=1 value=1 >> vp8_frame_header 0x009910d0 (unknown): type=301 >> flags=has-payload > >
