.priv_data_size = sizeof(PNGEncContext),
.init = png_enc_init,
.encode2 = encode_frame,
+ .capabilities = CODEC_CAP_FRAME_THREADS | CODEC_CAP_INTRA_ONLY,
.pix_fmts = (const enum PixelFormat[]){
PIX_FMT_RGB24, PIX_FMT_RGBA,
PIX_FMT_RGB48BE, PIX_FMT_RGBA64BE,