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. Do you need this to work with ffmpeg, or is GStreamer also OK? 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
