Pimoroni Pico DV - Raw Audio/Video Player

[Gadgetoid]

This AV player for the Pimoroni Pico DV uses straight-forward (ish) ffmpeg commands to convert any AV source into the raw formats required to blast directly at the i2s hardware/framebuffer.

I've tried to make this appropriate for inclusion in this repository, but I'll understand if you feel I need to stick it elsewhere!

Requires:

• pico-sdk - https://github.com/raspberrypi/pico-sdk
• pico-extras - https://github.com/raspberrypi/pico-extras (for i2s audio)
• pimoroni-pico - https://github.com/pimoroni/pimoroni-pico (for sdcard)
• this repository ( until merged: git clone https://github.com/Gadgetoid/PicoDVI -b av-player )

These should all be cloned alongside each other.

Building:

cd PicoDVI/software
mkdir build
cd build
cmake .. -DDVI_DEFAULT_SERIAL_CONFIG=pimoroni_demo_hdmi_cfg -DPICO_SDK_PATH=../../../pico-sdk -DPICO_SDK_POST_LIST_DIRS=`pwd`/../../../pico-extras
make raw_av_player -j

Warning

This example (and any other example for Pico DVI) requires that your HDMI display is capable of displaying the output signal and supports the configured timings.

By default this example uses dvi_timing_800x480p_60hz (I should probably change that) which you'll probably need to change to dvi_timing_640x480p_60hz.

You can do this by changing the line: #define DVI_TIMING dvi_timing_800x480p_60hz in main.cpp

Running:

Needs a FAT32-formatted SD card with audio/video files on:

Convert video to raw RGB656 litte-endian using ffmpeg, eg:

ffmpeg -i BigBuckBunny_640x360.m4v -vf scale=400:240,fps=12 -c:v rawvideo -pix_fmt rgb565le BigBuckBunny2.rgb

Convert audio to raw, signed, 16-bit, little-endian mono using ffmpeg, eg:

ffmpeg -i BigBuckBunny_640x360.m4v -f s16le -acodec pcm_s16le -ar 22050 -ac 1 BigBuckBunny2.pcm

Place these files on the SD card, insert, fire up, cross your fingers!

Notes

I'm mindful that this example brings a lot of baggage with the Pimoroni Pico libraries- therefore I have (hopefully) made CMake fail gracefully when these are not available and raw_av_player just wont be available as a target.