static int avisynth_read_packet_video(AVFormatContext *s, AVPacket *pkt, int discard) { AviSynthContext *avs = s->priv_data; AVS_VideoFrame *frame; unsigned char *dst_p; const unsigned char *src_p; int n, i, plane, rowsize, planeheight, pitch, bits; const char *error; if (avs->curr_frame >= avs->vi->num_frames) return AVERROR_EOF; // This must happen even if the stream is discarded to prevent desync. n = avs->curr_frame++; if (discard) return 0; pkt->pts = n; pkt->dts = n; pkt->duration = 1; // Define the bpp values for the new AviSynth 2.6 colorspaces if (avs_is_yv24(avs->vi)) { bits = 24; } else if (avs_is_yv16(avs->vi)) { bits = 16; } else if (avs_is_yv411(avs->vi)) { bits = 12; } else if (avs_is_y8(avs->vi)) { bits = 8; bits = avs_bits_per_pixel(avs->vi); // Without cast to int64_t, calculation overflows at about 9k x 9k resolution. pkt->size = (((int64_t)avs->vi->width * (int64_t)avs->vi->height) * bits) / 8; if (!pkt->size) pkt->data = av_malloc(pkt->size); if (!pkt->data) frame = avs_library->avs_get_frame(avs->clip, n); error = avs_library->avs_clip_get_error(avs->clip); if (error) { av_log(s, AV_LOG_ERROR, "%s\n", error); dst_p = pkt->data; for (i = 0; i < avs->n_planes; i++) { plane = avs->planes[i]; src_p = avs_get_read_ptr_p(frame, plane); rowsize = avs_get_row_size_p(frame, plane); planeheight = avs_get_height_p(frame, plane); pitch = avs_get_pitch_p(frame, plane); // Flip RGB video. if (avs_is_rgb24(avs->vi) || avs_is_rgb(avs->vi)) { src_p = src_p + (planeheight - 1) * pitch; pitch = -pitch; dst_p += rowsize * planeheight; avs_library->avs_release_video_frame(frame); return 0;