Get the KidiZoom® audio & video codec parameters

# get audio codec information$ ffprobe -hide_banner references/VOICE/V0110.WAVInput#0, wav, from 'references/VOICE/V0110.WAV':  Duration: 00:00:04.64, bitrate: 352 kb/s    Stream#0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s# get video codec information$ ffprobe -hide_banner references/DCIM/100VTECH/100_0010.AVIInput#0, avi, from 'references/DCIM/100VTECH/100_0010.AVI':  Metadata:    ISRC: Generplus    artist: Generplus    copyright: Generplus    date: 2010-06-29  Duration: 00:00:02.80, start: 0.000000, bitrate: 1423 kb/s    Stream#0:0: Video: mjpeg (MJPG / 0x47504A4D), yuvj422p(pc, bt470bg/unknown/unknown), 320x240, 1196 kb/s, 15 fps, 15 tbr, 15 tbn, 15 tbc    Stream#0:1: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 22050 Hz, 1 channels, s16, 352 kb/s

Convert videos to KidiZoom® avi video files

# IMPORTANT Please adjust input and output filenames belowexport input_filename="your_input_video_filename_with_extension"export output_filename="100_0042.AVI"# IMPORTANT you may need to adjust -q:v for having around 1.3Mbits/s)export video="-vcodec mjpeg -vf scale=320:240 -r 15 -pix_fmt yuvj422p -q:v 4"export audio="-acodec pcm_s16le -ar 22050 -ac 1"export extra="-map_metadata -1 -fflags +bitexact -metadata ISRC=Generplus -metadata artist=Generplus -metadata copyright=Generplus -metadata date=2010-06-29 -y"ffmpeg -i${input_filename}${video}${audio}${extra}${output_filename}

Convert audios to KidiZoom® wav audio files

# IMPORTANT Please adjust input and output filenames belowexport input_filename="your_input_audio_filename_with_extension"export output_filename="V0042.WAV"# mono, 22050Hz, pcm signed 16bit little endian, no metadataexport filename="your_input_audio_filename_with_extension"export audio="-acodec pcm_s16le -ar 22050 -ac 1"export extra="-map_metadata -1 -fflags +bitexact -y"ffmpeg -i${input_filename}${audio}${extra}${output_filename}

Extra: Use ffmpeg for creating the animated gif

wget https://upload.wikimedia.org/wikipedia/commons/transcoded/c/c0/Big_Buck_Bunny_4K.webm/Big_Buck_Bunny_4K.webm.480p.webm# IMPORTANT Please adjust input and output filenames belowexport background_image_filename="images/kidizoom_back.png"export input_filename="Big_Buck_Bunny_4K.webm.480p.webm"export output_filename="images/kidizoom_back_with_video.gif"# we keep only 20s, seeking first to 318s, resize to 144x112, only 10fpsffmpeg -ss 318 -t 20 -i${input_filename} -vf"fps=10,scale=144x112:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0 tmp.gif# we add a background and put the gif video at (216, 144)ffmpeg -t 20 -loop 1 -i${background_image_filename} -i tmp.gif -filter_complex"overlay=216:144" -loop 0${output_filename}

Any questions or comments are welcome 🐦