3 * ported to MPlayer by Arpi <arpi@thot.banki.hu>
4 * ported to libavcodec by Nick Kurshev <nickols_k@mail.ru>
6 * Copyright (C) 2002 the xine project
7 * Copyright (C) 2002 the ffmpeg project
9 * SVQ1 Encoder (c) 2004 Mike Melanson <melanson@pcisys.net>
11 * This file is part of Libav.
13 * Libav is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
18 * Libav is distributed in the hope that it will be useful,
19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
23 * You should have received a copy of the GNU Lesser General Public
24 * License along with Libav; if not, write to the Free Software
25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
30 * Sorenson Vector Quantizer #1 (SVQ1) video codec.
31 * For more information of the SVQ1 algorithm, visit:
32 * http://www.pcisys.net/~melanson/codecs/
38 #include "mpegvideo.h"
46 extern const uint8_t ff_mvtab[33][2];
48 static VLC svq1_block_type;
49 static VLC svq1_motion_component;
50 static VLC svq1_intra_multistage[6];
51 static VLC svq1_inter_multistage[6];
52 static VLC svq1_intra_mean;
53 static VLC svq1_inter_mean;
55 /* motion vector (prediction) */
56 typedef struct svq1_pmv_s {
61 static const uint8_t string_table[256] = {
62 0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54,
63 0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D,
64 0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06,
65 0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F,
66 0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0,
67 0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9,
68 0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2,
69 0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B,
70 0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9,
71 0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0,
72 0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B,
73 0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2,
74 0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D,
75 0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44,
76 0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F,
77 0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16,
78 0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB,
79 0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92,
80 0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9,
81 0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0,
82 0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F,
83 0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36,
84 0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D,
85 0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64,
86 0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26,
87 0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F,
88 0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74,
89 0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D,
90 0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82,
91 0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB,
92 0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0,
93 0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9
96 #define SVQ1_PROCESS_VECTOR()\
97 for (; level > 0; i++) {\
98 /* process next depth */\
104 /* divide block if next bit set */\
105 if (get_bits1 (bitbuf) == 0)\
107 /* add child nodes */\
108 list[n++] = list[i];\
109 list[n++] = list[i] + (((level & 1) ? pitch : 1) << ((level / 2) + 1));\
112 #define SVQ1_ADD_CODEBOOK()\
113 /* add codebook entries to vector */\
114 for (j=0; j < stages; j++) {\
115 n3 = codebook[entries[j]] ^ 0x80808080;\
116 n1 += ((n3 & 0xFF00FF00) >> 8);\
117 n2 += (n3 & 0x00FF00FF);\
120 /* clip to [0..255] */\
121 if (n1 & 0xFF00FF00) {\
122 n3 = ((( n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
124 n1 |= (((~n1 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
125 n1 &= (n3 & 0x00FF00FF);\
128 if (n2 & 0xFF00FF00) {\
129 n3 = ((( n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
131 n2 |= (((~n2 >> 15) & 0x00010001) | 0x01000100) - 0x00010001;\
132 n2 &= (n3 & 0x00FF00FF);\
135 #define SVQ1_DO_CODEBOOK_INTRA()\
136 for (y=0; y < height; y++) {\
137 for (x=0; x < (width / 4); x++, codebook++) {\
142 dst[x] = (n1 << 8) | n2;\
147 #define SVQ1_DO_CODEBOOK_NONINTRA()\
148 for (y=0; y < height; y++) {\
149 for (x=0; x < (width / 4); x++, codebook++) {\
151 /* add mean value to vector */\
152 n1 = ((n3 & 0xFF00FF00) >> 8) + n4;\
153 n2 = (n3 & 0x00FF00FF) + n4;\
156 dst[x] = (n1 << 8) | n2;\
161 #define SVQ1_CALC_CODEBOOK_ENTRIES(cbook)\
162 codebook = (const uint32_t *) cbook[level];\
164 bit_cache = get_bits (bitbuf, 4*stages);\
165 /* calculate codebook entries for this vector */\
166 for (j=0; j < stages; j++) {\
167 entries[j] = (((bit_cache >> (4*(stages - j - 1))) & 0xF) + 16*j) << (level + 1);\
169 mean -= (stages * 128);\
170 n4 = ((mean + (mean >> 31)) << 16) | (mean & 0xFFFF);
172 static int svq1_decode_block_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) {
176 const uint32_t *codebook;
180 unsigned x, y, width, height, level;
181 uint32_t n1, n2, n3, n4;
183 /* initialize list for breadth first processing of vectors */
186 /* recursively process vector */
187 for (i=0, m=1, n=1, level=5; i < n; i++) {
188 SVQ1_PROCESS_VECTOR();
190 /* destination address and vector size */
191 dst = (uint32_t *) list[i];
192 width = 1 << ((4 + level) /2);
193 height = 1 << ((3 + level) /2);
195 /* get number of stages (-1 skips vector, 0 for mean only) */
196 stages = get_vlc2(bitbuf, svq1_intra_multistage[level].table, 3, 3) - 1;
199 for (y=0; y < height; y++) {
200 memset (&dst[y*(pitch / 4)], 0, width);
202 continue; /* skip vector */
205 if ((stages > 0) && (level >= 4)) {
207 "Error (svq1_decode_block_intra): invalid vector: stages=%i level=%i\n",
209 return -1; /* invalid vector */
212 mean = get_vlc2(bitbuf, svq1_intra_mean.table, 8, 3);
215 for (y=0; y < height; y++) {
216 memset (&dst[y*(pitch / 4)], mean, width);
219 SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_intra_codebooks);
220 SVQ1_DO_CODEBOOK_INTRA()
227 static int svq1_decode_block_non_intra (GetBitContext *bitbuf, uint8_t *pixels, int pitch ) {
231 const uint32_t *codebook;
235 int x, y, width, height, level;
236 uint32_t n1, n2, n3, n4;
238 /* initialize list for breadth first processing of vectors */
241 /* recursively process vector */
242 for (i=0, m=1, n=1, level=5; i < n; i++) {
243 SVQ1_PROCESS_VECTOR();
245 /* destination address and vector size */
246 dst = (uint32_t *) list[i];
247 width = 1 << ((4 + level) /2);
248 height = 1 << ((3 + level) /2);
250 /* get number of stages (-1 skips vector, 0 for mean only) */
251 stages = get_vlc2(bitbuf, svq1_inter_multistage[level].table, 3, 2) - 1;
253 if (stages == -1) continue; /* skip vector */
255 if ((stages > 0) && (level >= 4)) {
257 "Error (svq1_decode_block_non_intra): invalid vector: stages=%i level=%i\n",
259 return -1; /* invalid vector */
262 mean = get_vlc2(bitbuf, svq1_inter_mean.table, 9, 3) - 256;
264 SVQ1_CALC_CODEBOOK_ENTRIES(ff_svq1_inter_codebooks);
265 SVQ1_DO_CODEBOOK_NONINTRA()
270 static int svq1_decode_motion_vector (GetBitContext *bitbuf, svq1_pmv *mv, svq1_pmv **pmv) {
274 for (i=0; i < 2; i++) {
276 /* get motion code */
277 diff = get_vlc2(bitbuf, svq1_motion_component.table, 7, 2);
281 if(get_bits1(bitbuf)) diff= -diff;
284 /* add median of motion vector predictors and clip result */
286 mv->y = sign_extend(diff + mid_pred(pmv[0]->y, pmv[1]->y, pmv[2]->y), 6);
288 mv->x = sign_extend(diff + mid_pred(pmv[0]->x, pmv[1]->x, pmv[2]->x), 6);
294 static void svq1_skip_block (uint8_t *current, uint8_t *previous, int pitch, int x, int y) {
299 src = &previous[x + y*pitch];
302 for (i=0; i < 16; i++) {
303 memcpy (dst, src, 16);
309 static int svq1_motion_inter_block (MpegEncContext *s, GetBitContext *bitbuf,
310 uint8_t *current, uint8_t *previous, int pitch,
311 svq1_pmv *motion, int x, int y) {
318 /* predict and decode motion vector */
325 pmv[1] = &motion[(x / 8) + 2];
326 pmv[2] = &motion[(x / 8) + 4];
329 result = svq1_decode_motion_vector (bitbuf, &mv, pmv);
335 motion[(x / 8) + 2].x =
336 motion[(x / 8) + 3].x = mv.x;
338 motion[(x / 8) + 2].y =
339 motion[(x / 8) + 3].y = mv.y;
341 if(y + (mv.y >> 1)<0)
343 if(x + (mv.x >> 1)<0)
346 src = &previous[(x + (mv.x >> 1)) + (y + (mv.y >> 1))*pitch];
349 s->dsp.put_pixels_tab[0][((mv.y & 1) << 1) | (mv.x & 1)](dst,src,pitch,16);
354 static int svq1_motion_inter_4v_block (MpegEncContext *s, GetBitContext *bitbuf,
355 uint8_t *current, uint8_t *previous, int pitch,
356 svq1_pmv *motion,int x, int y) {
363 /* predict and decode motion vector (0) */
370 pmv[1] = &motion[(x / 8) + 2];
371 pmv[2] = &motion[(x / 8) + 4];
374 result = svq1_decode_motion_vector (bitbuf, &mv, pmv);
379 /* predict and decode motion vector (1) */
386 pmv[1] = &motion[(x / 8) + 3];
388 result = svq1_decode_motion_vector (bitbuf, &motion[0], pmv);
393 /* predict and decode motion vector (2) */
395 pmv[2] = &motion[(x / 8) + 1];
397 result = svq1_decode_motion_vector (bitbuf, &motion[(x / 8) + 2], pmv);
402 /* predict and decode motion vector (3) */
403 pmv[2] = &motion[(x / 8) + 2];
404 pmv[3] = &motion[(x / 8) + 3];
406 result = svq1_decode_motion_vector (bitbuf, pmv[3], pmv);
411 /* form predictions */
412 for (i=0; i < 4; i++) {
413 int mvx= pmv[i]->x + (i&1)*16;
414 int mvy= pmv[i]->y + (i>>1)*16;
416 ///XXX /FIXME clipping or padding?
422 src = &previous[(x + (mvx >> 1)) + (y + (mvy >> 1))*pitch];
425 s->dsp.put_pixels_tab[1][((mvy & 1) << 1) | (mvx & 1)](dst,src,pitch,8);
427 /* select next block */
429 current += 8*(pitch - 1);
438 static int svq1_decode_delta_block (MpegEncContext *s, GetBitContext *bitbuf,
439 uint8_t *current, uint8_t *previous, int pitch,
440 svq1_pmv *motion, int x, int y) {
445 block_type = get_vlc2(bitbuf, svq1_block_type.table, 2, 2);
447 /* reset motion vectors */
448 if (block_type == SVQ1_BLOCK_SKIP || block_type == SVQ1_BLOCK_INTRA) {
451 motion[(x / 8) + 2].x =
452 motion[(x / 8) + 2].y =
453 motion[(x / 8) + 3].x =
454 motion[(x / 8) + 3].y = 0;
457 switch (block_type) {
458 case SVQ1_BLOCK_SKIP:
459 svq1_skip_block (current, previous, pitch, x, y);
462 case SVQ1_BLOCK_INTER:
463 result = svq1_motion_inter_block (s, bitbuf, current, previous, pitch, motion, x, y);
467 av_dlog(s->avctx, "Error in svq1_motion_inter_block %i\n", result);
470 result = svq1_decode_block_non_intra (bitbuf, current, pitch);
473 case SVQ1_BLOCK_INTER_4V:
474 result = svq1_motion_inter_4v_block (s, bitbuf, current, previous, pitch, motion, x, y);
478 av_dlog(s->avctx, "Error in svq1_motion_inter_4v_block %i\n", result);
481 result = svq1_decode_block_non_intra (bitbuf, current, pitch);
484 case SVQ1_BLOCK_INTRA:
485 result = svq1_decode_block_intra (bitbuf, current, pitch);
492 static void svq1_parse_string (GetBitContext *bitbuf, uint8_t *out) {
496 out[0] = get_bits (bitbuf, 8);
498 seed = string_table[out[0]];
500 for (i=1; i <= out[0]; i++) {
501 out[i] = get_bits (bitbuf, 8) ^ seed;
502 seed = string_table[out[i] ^ seed];
506 static int svq1_decode_frame_header (GetBitContext *bitbuf,MpegEncContext *s) {
509 skip_bits(bitbuf, 8); /* temporal_reference */
512 s->pict_type= get_bits (bitbuf, 2)+1;
516 if (s->pict_type == AV_PICTURE_TYPE_I) {
519 if (s->f_code == 0x50 || s->f_code == 0x60) {
520 int csum = get_bits (bitbuf, 16);
522 csum = ff_svq1_packet_checksum (bitbuf->buffer, bitbuf->size_in_bits>>3, csum);
524 // av_log(s->avctx, AV_LOG_INFO, "%s checksum (%02x) for packet data\n",
525 // (csum == 0) ? "correct" : "incorrect", csum);
528 if ((s->f_code ^ 0x10) >= 0x50) {
531 svq1_parse_string (bitbuf, msg);
533 av_log(s->avctx, AV_LOG_INFO, "embedded message: \"%s\"\n", (char *) msg);
536 skip_bits (bitbuf, 2);
537 skip_bits (bitbuf, 2);
540 /* load frame size */
541 frame_size_code = get_bits (bitbuf, 3);
543 if (frame_size_code == 7) {
544 /* load width, height (12 bits each) */
545 s->width = get_bits (bitbuf, 12);
546 s->height = get_bits (bitbuf, 12);
548 if (!s->width || !s->height)
551 /* get width, height from table */
552 s->width = ff_svq1_frame_size_table[frame_size_code].width;
553 s->height = ff_svq1_frame_size_table[frame_size_code].height;
558 if (get_bits1 (bitbuf) == 1) {
559 skip_bits1 (bitbuf); /* use packet checksum if (1) */
560 skip_bits1 (bitbuf); /* component checksums after image data if (1) */
562 if (get_bits (bitbuf, 2) != 0)
566 if (get_bits1 (bitbuf) == 1) {
568 skip_bits (bitbuf, 4);
570 skip_bits (bitbuf, 2);
572 while (get_bits1 (bitbuf) == 1) {
573 skip_bits (bitbuf, 8);
580 static int svq1_decode_frame(AVCodecContext *avctx,
581 void *data, int *data_size,
584 const uint8_t *buf = avpkt->data;
585 int buf_size = avpkt->size;
586 MpegEncContext *s=avctx->priv_data;
587 uint8_t *current, *previous;
588 int result, i, x, y, width, height;
589 AVFrame *pict = data;
592 /* initialize bit buffer */
593 init_get_bits(&s->gb,buf,buf_size*8);
595 /* decode frame header */
596 s->f_code = get_bits (&s->gb, 22);
598 if ((s->f_code & ~0x70) || !(s->f_code & 0x60))
601 /* swap some header bytes (why?) */
602 if (s->f_code != 0x20) {
603 uint32_t *src = (uint32_t *) (buf + 4);
605 for (i=0; i < 4; i++) {
606 src[i] = ((src[i] << 16) | (src[i] >> 16)) ^ src[7 - i];
610 result = svq1_decode_frame_header (&s->gb, s);
614 av_dlog(s->avctx, "Error in svq1_decode_frame_header %i\n",result);
617 avcodec_set_dimensions(avctx, s->width, s->height);
619 //FIXME this avoids some confusion for "B frames" without 2 references
620 //this should be removed after libavcodec can handle more flexible picture types & ordering
621 if(s->pict_type==AV_PICTURE_TYPE_B && s->last_picture_ptr==NULL) return buf_size;
623 if( (avctx->skip_frame >= AVDISCARD_NONREF && s->pict_type==AV_PICTURE_TYPE_B)
624 ||(avctx->skip_frame >= AVDISCARD_NONKEY && s->pict_type!=AV_PICTURE_TYPE_I)
625 || avctx->skip_frame >= AVDISCARD_ALL)
628 if(ff_MPV_frame_start(s, avctx) < 0)
631 pmv = av_malloc((FFALIGN(s->width, 16)/8 + 3) * sizeof(*pmv));
635 /* decode y, u and v components */
636 for (i=0; i < 3; i++) {
639 width = FFALIGN(s->width, 16);
640 height = FFALIGN(s->height, 16);
641 linesize= s->linesize;
643 if(s->flags&CODEC_FLAG_GRAY) break;
644 width = FFALIGN(s->width/4, 16);
645 height = FFALIGN(s->height/4, 16);
646 linesize= s->uvlinesize;
649 current = s->current_picture.f.data[i];
651 if(s->pict_type==AV_PICTURE_TYPE_B){
652 previous = s->next_picture.f.data[i];
654 previous = s->last_picture.f.data[i];
657 if (s->pict_type == AV_PICTURE_TYPE_I) {
659 for (y=0; y < height; y+=16) {
660 for (x=0; x < width; x+=16) {
661 result = svq1_decode_block_intra (&s->gb, ¤t[x], linesize);
664 av_log(s->avctx, AV_LOG_INFO, "Error in svq1_decode_block %i (keyframe)\n",result);
668 current += 16*linesize;
672 memset (pmv, 0, ((width / 8) + 3) * sizeof(svq1_pmv));
674 for (y=0; y < height; y+=16) {
675 for (x=0; x < width; x+=16) {
676 result = svq1_decode_delta_block (s, &s->gb, ¤t[x], previous,
677 linesize, pmv, x, y);
680 av_dlog(s->avctx, "Error in svq1_decode_delta_block %i\n",result);
688 current += 16*linesize;
693 *pict = s->current_picture.f;
698 *data_size=sizeof(AVFrame);
705 static av_cold int svq1_decode_init(AVCodecContext *avctx)
707 MpegEncContext *s = avctx->priv_data;
711 ff_MPV_decode_defaults(s);
714 s->width = (avctx->width+3)&~3;
715 s->height = (avctx->height+3)&~3;
716 s->codec_id= avctx->codec->id;
717 avctx->pix_fmt = PIX_FMT_YUV410P;
718 avctx->has_b_frames= 1; // not true, but DP frames and these behave like unidirectional b frames
719 s->flags= avctx->flags;
720 if (ff_MPV_common_init(s) < 0) return -1;
722 INIT_VLC_STATIC(&svq1_block_type, 2, 4,
723 &ff_svq1_block_type_vlc[0][1], 2, 1,
724 &ff_svq1_block_type_vlc[0][0], 2, 1, 6);
726 INIT_VLC_STATIC(&svq1_motion_component, 7, 33,
727 &ff_mvtab[0][1], 2, 1,
728 &ff_mvtab[0][0], 2, 1, 176);
730 for (i = 0; i < 6; i++) {
731 static const uint8_t sizes[2][6] = {{14, 10, 14, 18, 16, 18}, {10, 10, 14, 14, 14, 16}};
732 static VLC_TYPE table[168][2];
733 svq1_intra_multistage[i].table = &table[offset];
734 svq1_intra_multistage[i].table_allocated = sizes[0][i];
735 offset += sizes[0][i];
736 init_vlc(&svq1_intra_multistage[i], 3, 8,
737 &ff_svq1_intra_multistage_vlc[i][0][1], 2, 1,
738 &ff_svq1_intra_multistage_vlc[i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC);
739 svq1_inter_multistage[i].table = &table[offset];
740 svq1_inter_multistage[i].table_allocated = sizes[1][i];
741 offset += sizes[1][i];
742 init_vlc(&svq1_inter_multistage[i], 3, 8,
743 &ff_svq1_inter_multistage_vlc[i][0][1], 2, 1,
744 &ff_svq1_inter_multistage_vlc[i][0][0], 2, 1, INIT_VLC_USE_NEW_STATIC);
747 INIT_VLC_STATIC(&svq1_intra_mean, 8, 256,
748 &ff_svq1_intra_mean_vlc[0][1], 4, 2,
749 &ff_svq1_intra_mean_vlc[0][0], 4, 2, 632);
751 INIT_VLC_STATIC(&svq1_inter_mean, 9, 512,
752 &ff_svq1_inter_mean_vlc[0][1], 4, 2,
753 &ff_svq1_inter_mean_vlc[0][0], 4, 2, 1434);
758 static av_cold int svq1_decode_end(AVCodecContext *avctx)
760 MpegEncContext *s = avctx->priv_data;
762 ff_MPV_common_end(s);
767 AVCodec ff_svq1_decoder = {
769 .type = AVMEDIA_TYPE_VIDEO,
770 .id = AV_CODEC_ID_SVQ1,
771 .priv_data_size = sizeof(MpegEncContext),
772 .init = svq1_decode_init,
773 .close = svq1_decode_end,
774 .decode = svq1_decode_frame,
775 .capabilities = CODEC_CAP_DR1,
776 .flush = ff_mpeg_flush,
777 .pix_fmts = (const enum PixelFormat[]){ PIX_FMT_YUV410P, PIX_FMT_NONE },
778 .long_name = NULL_IF_CONFIG_SMALL("Sorenson Vector Quantizer 1 / Sorenson Video 1 / SVQ1"),