/* * MPEG-4 encoder * Copyright (c) 2000,2001 Fabrice Bellard * Copyright (c) 2002-2010 Michael Niedermayer * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include "libavutil/attributes.h" #include "libavutil/log.h" #include "libavutil/mem.h" #include "libavutil/opt.h" #include "libavutil/thread.h" #include "codec_internal.h" #include "mpegvideo.h" #include "h263.h" #include "h263enc.h" #include "mathops.h" #include "mpeg4video.h" #include "mpeg4videodata.h" #include "mpeg4videodefs.h" #include "mpeg4videoenc.h" #include "mpegvideoenc.h" #include "profiles.h" #include "put_bits.h" #include "version.h" /** * Minimal fcode that a motion vector component would need. */ static uint8_t fcode_tab[MAX_MV*2+1]; /* The uni_DCtab_* tables below contain unified bits+length tables to encode DC * differences in MPEG-4. Unified in the sense that the specification specifies * this encoding in several steps. */ static uint8_t uni_DCtab_lum_len[512]; static uint8_t uni_DCtab_chrom_len[512]; static uint16_t uni_DCtab_lum_bits[512]; static uint16_t uni_DCtab_chrom_bits[512]; /* Unified encoding tables for run length encoding of coefficients. * Unified in the sense that the specification specifies the encoding in several steps. */ static uint32_t uni_mpeg4_intra_rl_bits[64 * 64 * 2 * 2]; static uint8_t uni_mpeg4_intra_rl_len[64 * 64 * 2 * 2]; static uint32_t uni_mpeg4_inter_rl_bits[64 * 64 * 2 * 2]; static uint8_t uni_mpeg4_inter_rl_len[64 * 64 * 2 * 2]; //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 + (run) * 256 + (level)) //#define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) + (level) * 64) #define UNI_MPEG4_ENC_INDEX(last, run, level) ((last) * 128 * 64 + (run) * 128 + (level)) /* MPEG-4 * inter * max level: 24/6 * max run: 53/63 * * intra * max level: 53/16 * max run: 29/41 */ typedef struct Mpeg4EncContext { MPVMainEncContext m; /// number of bits to represent the fractional part of time int time_increment_bits; } Mpeg4EncContext; static inline Mpeg4EncContext *mainctx_to_mpeg4(MPVMainEncContext *m) { return (Mpeg4EncContext*)m; } /** * Return the number of bits that encoding the 8x8 block in block would need. * @param[in] block_last_index last index in scantable order that refers to a non zero element in block. */ static inline int get_block_rate(MPVEncContext *const s, int16_t block[64], int block_last_index, const uint8_t scantable[64]) { int last = 0; int j; int rate = 0; for (j = 1; j <= block_last_index; j++) { const int index = scantable[j]; int level = block[index]; if (level) { level += 64; if ((level & (~127)) == 0) { if (j < block_last_index) rate += s->intra_ac_vlc_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; else rate += s->intra_ac_vlc_last_length[UNI_AC_ENC_INDEX(j - last - 1, level)]; } else rate += s->ac_esc_length; last = j; } } return rate; } /** * Restore the ac coefficients in block that have been changed by decide_ac_pred(). * This function also restores s->c.block_last_index. * @param[in,out] block MB coefficients, these will be restored * @param[in] dir ac prediction direction for each 8x8 block * @param[out] st scantable for each 8x8 block * @param[in] zigzag_last_index index referring to the last non zero coefficient in zigzag order */ static inline void restore_ac_coeffs(MPVEncContext *const s, int16_t block[6][64], const int dir[6], const uint8_t *st[6], const int zigzag_last_index[6]) { int i, n; memcpy(s->c.block_last_index, zigzag_last_index, sizeof(int) * 6); for (n = 0; n < 6; n++) { int16_t *ac_val = &s->c.ac_val[0][0] + s->c.block_index[n] * 16; st[n] = s->c.intra_scantable.permutated; if (dir[n]) { /* top prediction */ for (i = 1; i < 8; i++) block[n][s->c.idsp.idct_permutation[i]] = ac_val[i + 8]; } else { /* left prediction */ for (i = 1; i < 8; i++) block[n][s->c.idsp.idct_permutation[i << 3]] = ac_val[i]; } } } /** * Predict the dc. * @param n block index (0-3 are luma, 4-5 are chroma) * @param dir_ptr pointer to an integer where the prediction direction will be stored */ static int mpeg4_pred_dc(MpegEncContext *s, int n, int *dir_ptr) { const int16_t *const dc_val = s->dc_val + s->block_index[n]; const int wrap = s->block_wrap[n]; /* B C * A X */ const int a = dc_val[-1]; const int b = dc_val[-1 - wrap]; const int c = dc_val[-wrap]; int pred; // There is no need for out-of-slice handling here, as all values are set // appropriately when a new slice is opened. if (abs(a - b) < abs(b - c)) { pred = c; *dir_ptr = 1; /* top */ } else { pred = a; *dir_ptr = 0; /* left */ } return pred; } /** * Return the optimal value (0 or 1) for the ac_pred element for the given MB in MPEG-4. * This function will also update s->c.block_last_index and s->c.ac_val. * @param[in,out] block MB coefficients, these will be updated if 1 is returned * @param[in] dir ac prediction direction for each 8x8 block * @param[out] st scantable for each 8x8 block * @param[out] zigzag_last_index index referring to the last non zero coefficient in zigzag order */ static inline int decide_ac_pred(MPVEncContext *const s, int16_t block[6][64], const int dir[6], const uint8_t *st[6], int zigzag_last_index[6]) { int score = 0; int i, n; const int8_t *const qscale_table = s->c.cur_pic.qscale_table; memcpy(zigzag_last_index, s->c.block_last_index, sizeof(int) * 6); for (n = 0; n < 6; n++) { int16_t *ac_val, *ac_val1; score -= get_block_rate(s, block[n], s->c.block_last_index[n], s->c.intra_scantable.permutated); ac_val = &s->c.ac_val[0][0] + s->c.block_index[n] * 16; ac_val1 = ac_val; if (dir[n]) { const int xy = s->c.mb_x + s->c.mb_y * s->c.mb_stride - s->c.mb_stride; /* top prediction */ ac_val -= s->c.block_wrap[n] * 16; if (s->c.first_slice_line || s->c.qscale == qscale_table[xy] || n == 2 || n == 3) { /* same qscale */ for (i = 1; i < 8; i++) { const int level = block[n][s->c.idsp.idct_permutation[i]]; block[n][s->c.idsp.idct_permutation[i]] = level - ac_val[i + 8]; ac_val1[i] = block[n][s->c.idsp.idct_permutation[i << 3]]; ac_val1[i + 8] = level; } } else { /* different qscale, we must rescale */ for (i = 1; i < 8; i++) { const int level = block[n][s->c.idsp.idct_permutation[i]]; block[n][s->c.idsp.idct_permutation[i]] = level - ROUNDED_DIV(ac_val[i + 8] * qscale_table[xy], s->c.qscale); ac_val1[i] = block[n][s->c.idsp.idct_permutation[i << 3]]; ac_val1[i + 8] = level; } } st[n] = s->c.permutated_intra_h_scantable; } else { const int xy = s->c.mb_x - 1 + s->c.mb_y * s->c.mb_stride; /* left prediction */ ac_val -= 16; if (s->c.mb_x == 0 || s->c.qscale == qscale_table[xy] || n == 1 || n == 3) { /* same qscale */ for (i = 1; i < 8; i++) { const int level = block[n][s->c.idsp.idct_permutation[i << 3]]; block[n][s->c.idsp.idct_permutation[i << 3]] = level - ac_val[i]; ac_val1[i] = level; ac_val1[i + 8] = block[n][s->c.idsp.idct_permutation[i]]; } } else { /* different qscale, we must rescale */ for (i = 1; i < 8; i++) { const int level = block[n][s->c.idsp.idct_permutation[i << 3]]; block[n][s->c.idsp.idct_permutation[i << 3]] = level - ROUNDED_DIV(ac_val[i] * qscale_table[xy], s->c.qscale); ac_val1[i] = level; ac_val1[i + 8] = block[n][s->c.idsp.idct_permutation[i]]; } } st[n] = s->c.permutated_intra_v_scantable; } for (i = 63; i > 0; i--) // FIXME optimize if (block[n][st[n][i]]) break; s->c.block_last_index[n] = i; score += get_block_rate(s, block[n], s->c.block_last_index[n], st[n]); } if (score < 0) { return 1; } else { restore_ac_coeffs(s, block, dir, st, zigzag_last_index); return 0; } } /** * modify mb_type & qscale so that encoding is actually possible in MPEG-4 */ void ff_clean_mpeg4_qscales(MPVEncContext *const s) { ff_clean_h263_qscales(s); if (s->c.pict_type == AV_PICTURE_TYPE_B) { int8_t *const qscale_table = s->c.cur_pic.qscale_table; int odd = 0; /* ok, come on, this isn't funny anymore, there's more code for * handling this MPEG-4 mess than for the actual adaptive quantization */ for (int i = 0; i < s->c.mb_num; i++) { int mb_xy = s->c.mb_index2xy[i]; odd += qscale_table[mb_xy] & 1; } if (2 * odd > s->c.mb_num) odd = 1; else odd = 0; for (int i = 0; i < s->c.mb_num; i++) { int mb_xy = s->c.mb_index2xy[i]; if ((qscale_table[mb_xy] & 1) != odd) qscale_table[mb_xy]++; if (qscale_table[mb_xy] > 31) qscale_table[mb_xy] = 31; } for (int i = 1; i < s->c.mb_num; i++) { int mb_xy = s->c.mb_index2xy[i]; if (qscale_table[mb_xy] != qscale_table[s->c.mb_index2xy[i - 1]] && (s->mb_type[mb_xy] & CANDIDATE_MB_TYPE_DIRECT)) { s->mb_type[mb_xy] |= CANDIDATE_MB_TYPE_BIDIR; } } } } /** * Encode the dc value. * @param n block index (0-3 are luma, 4-5 are chroma) */ static inline void mpeg4_encode_dc(PutBitContext *s, int level, int n) { /* DC will overflow if level is outside the [-255,255] range. */ level += 256; if (n < 4) { /* luminance */ put_bits(s, uni_DCtab_lum_len[level], uni_DCtab_lum_bits[level]); } else { /* chrominance */ put_bits(s, uni_DCtab_chrom_len[level], uni_DCtab_chrom_bits[level]); } } /** * Encode the AC coefficients of an 8x8 block. */ static inline void mpeg4_encode_ac_coeffs(const int16_t block[64], const int last_index, int i, const uint8_t *const scan_table, PutBitContext *const ac_pb, const uint32_t *const bits_tab, const uint8_t *const len_tab) { int last_non_zero = i - 1; /* AC coefs */ for (; i < last_index; i++) { int level = block[scan_table[i]]; if (level) { int run = i - last_non_zero - 1; level += 64; if ((level & (~127)) == 0) { const int index = UNI_MPEG4_ENC_INDEX(0, run, level); put_bits(ac_pb, len_tab[index], bits_tab[index]); } else { // ESC3 put_bits(ac_pb, 7 + 2 + 1 + 6 + 1 + 12 + 1, (3 << 23) + (3 << 21) + (0 << 20) + (run << 14) + (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); } last_non_zero = i; } } /* if (i <= last_index) */ { int level = block[scan_table[i]]; int run = i - last_non_zero - 1; level += 64; if ((level & (~127)) == 0) { const int index = UNI_MPEG4_ENC_INDEX(1, run, level); put_bits(ac_pb, len_tab[index], bits_tab[index]); } else { // ESC3 put_bits(ac_pb, 7 + 2 + 1 + 6 + 1 + 12 + 1, (3 << 23) + (3 << 21) + (1 << 20) + (run << 14) + (1 << 13) + (((level - 64) & 0xfff) << 1) + 1); } } } static void mpeg4_encode_blocks_inter(MPVEncContext *const s, const int16_t block[6][64], PutBitContext *ac_pb) { /* encode each block */ for (int n = 0; n < 6; ++n) { const int last_index = s->c.block_last_index[n]; if (last_index < 0) continue; mpeg4_encode_ac_coeffs(block[n], last_index, 0, s->c.intra_scantable.permutated, ac_pb, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); } } static void mpeg4_encode_blocks_intra(MPVEncContext *const s, const int16_t block[6][64], const int intra_dc[6], const uint8_t * const *scan_table, PutBitContext *dc_pb, PutBitContext *ac_pb) { /* encode each block */ for (int n = 0; n < 6; ++n) { mpeg4_encode_dc(dc_pb, intra_dc[n], n); const int last_index = s->c.block_last_index[n]; if (last_index <= 0) continue; mpeg4_encode_ac_coeffs(block[n], last_index, 1, scan_table[n], ac_pb, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); } } static inline int get_b_cbp(MPVEncContext *const s, int16_t block[6][64], int motion_x, int motion_y, int mb_type) { int cbp = 0, i; if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) { int score = 0; const int lambda = s->lambda2 >> (FF_LAMBDA_SHIFT - 6); for (i = 0; i < 6; i++) { if (s->coded_score[i] < 0) { score += s->coded_score[i]; cbp |= 1 << (5 - i); } } if (cbp) { int zero_score = -6; if ((motion_x | motion_y | s->dquant | mb_type) == 0) zero_score -= 4; // 2 * MV + mb_type + cbp bit zero_score *= lambda; if (zero_score <= score) cbp = 0; } for (i = 0; i < 6; i++) { if (s->c.block_last_index[i] >= 0 && ((cbp >> (5 - i)) & 1) == 0) { s->c.block_last_index[i] = -1; s->c.bdsp.clear_block(s->block[i]); } } } else { for (i = 0; i < 6; i++) { if (s->c.block_last_index[i] >= 0) cbp |= 1 << (5 - i); } } return cbp; } // FIXME this is duplicated to h263.c static const int dquant_code[5] = { 1, 0, 9, 2, 3 }; static void mpeg4_encode_mb(MPVEncContext *const s, int16_t block[][64], int motion_x, int motion_y) { int cbpc, cbpy, pred_x, pred_y; PutBitContext *const pb2 = s->data_partitioning ? &s->pb2 : &s->pb; PutBitContext *const tex_pb = s->data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_B ? &s->tex_pb : &s->pb; PutBitContext *const dc_pb = s->data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_I ? &s->pb2 : &s->pb; const int interleaved_stats = (s->c.avctx->flags & AV_CODEC_FLAG_PASS1) && !s->data_partitioning; if (!s->c.mb_intra) { int i, cbp; if (s->c.pict_type == AV_PICTURE_TYPE_B) { /* convert from mv_dir to type */ static const int mb_type_table[8] = { -1, 3, 2, 1, -1, -1, -1, 0 }; int mb_type = mb_type_table[s->c.mv_dir]; if (s->c.mb_x == 0) { for (i = 0; i < 2; i++) s->c.last_mv[i][0][0] = s->c.last_mv[i][0][1] = s->c.last_mv[i][1][0] = s->c.last_mv[i][1][1] = 0; } av_assert2(s->dquant >= -2 && s->dquant <= 2); av_assert2((s->dquant & 1) == 0); av_assert2(mb_type >= 0); /* nothing to do if this MB was skipped in the next P-frame */ if (s->c.next_pic.mbskip_table[s->c.mb_y * s->c.mb_stride + s->c.mb_x]) { // FIXME avoid DCT & ... s->c.mv[0][0][0] = s->c.mv[0][0][1] = s->c.mv[1][0][0] = s->c.mv[1][0][1] = 0; s->c.mv_dir = MV_DIR_FORWARD; // doesn't matter s->c.qscale -= s->dquant; // s->c.mb_skipped = 1; return; } cbp = get_b_cbp(s, block, motion_x, motion_y, mb_type); if ((cbp | motion_x | motion_y | mb_type) == 0) { /* direct MB with MV={0,0} */ av_assert2(s->dquant == 0); put_bits(&s->pb, 1, 1); /* mb not coded modb1=1 */ if (interleaved_stats) { s->misc_bits++; s->last_bits++; } return; } put_bits(&s->pb, 1, 0); /* mb coded modb1=0 */ put_bits(&s->pb, 1, cbp ? 0 : 1); /* modb2 */ // FIXME merge put_bits(&s->pb, mb_type + 1, 1); // this table is so simple that we don't need it :) if (cbp) put_bits(&s->pb, 6, cbp); if (cbp && mb_type) { if (s->dquant) put_bits(&s->pb, 2, (s->dquant >> 2) + 3); else put_bits(&s->pb, 1, 0); } else s->c.qscale -= s->dquant; if (!s->c.progressive_sequence) { if (cbp) put_bits(&s->pb, 1, s->c.interlaced_dct); if (mb_type) // not direct mode put_bits(&s->pb, 1, s->c.mv_type == MV_TYPE_FIELD); } if (interleaved_stats) s->misc_bits += get_bits_diff(s); if (!mb_type) { av_assert2(s->c.mv_dir & MV_DIRECT); ff_h263_encode_motion_vector(s, motion_x, motion_y, 1); } else { av_assert2(mb_type > 0 && mb_type < 4); if (s->c.mv_type != MV_TYPE_FIELD) { if (s->c.mv_dir & MV_DIR_FORWARD) { ff_h263_encode_motion_vector(s, s->c.mv[0][0][0] - s->c.last_mv[0][0][0], s->c.mv[0][0][1] - s->c.last_mv[0][0][1], s->f_code); s->c.last_mv[0][0][0] = s->c.last_mv[0][1][0] = s->c.mv[0][0][0]; s->c.last_mv[0][0][1] = s->c.last_mv[0][1][1] = s->c.mv[0][0][1]; } if (s->c.mv_dir & MV_DIR_BACKWARD) { ff_h263_encode_motion_vector(s, s->c.mv[1][0][0] - s->c.last_mv[1][0][0], s->c.mv[1][0][1] - s->c.last_mv[1][0][1], s->b_code); s->c.last_mv[1][0][0] = s->c.last_mv[1][1][0] = s->c.mv[1][0][0]; s->c.last_mv[1][0][1] = s->c.last_mv[1][1][1] = s->c.mv[1][0][1]; } } else { if (s->c.mv_dir & MV_DIR_FORWARD) { put_bits(&s->pb, 1, s->c.field_select[0][0]); put_bits(&s->pb, 1, s->c.field_select[0][1]); } if (s->c.mv_dir & MV_DIR_BACKWARD) { put_bits(&s->pb, 1, s->c.field_select[1][0]); put_bits(&s->pb, 1, s->c.field_select[1][1]); } if (s->c.mv_dir & MV_DIR_FORWARD) { for (i = 0; i < 2; i++) { ff_h263_encode_motion_vector(s, s->c.mv[0][i][0] - s->c.last_mv[0][i][0], s->c.mv[0][i][1] - s->c.last_mv[0][i][1] / 2, s->f_code); s->c.last_mv[0][i][0] = s->c.mv[0][i][0]; s->c.last_mv[0][i][1] = s->c.mv[0][i][1] * 2; } } if (s->c.mv_dir & MV_DIR_BACKWARD) { for (i = 0; i < 2; i++) { ff_h263_encode_motion_vector(s, s->c.mv[1][i][0] - s->c.last_mv[1][i][0], s->c.mv[1][i][1] - s->c.last_mv[1][i][1] / 2, s->b_code); s->c.last_mv[1][i][0] = s->c.mv[1][i][0]; s->c.last_mv[1][i][1] = s->c.mv[1][i][1] * 2; } } } } if (interleaved_stats) s->mv_bits += get_bits_diff(s); mpeg4_encode_blocks_inter(s, block, &s->pb); if (interleaved_stats) s->p_tex_bits += get_bits_diff(s); } else { /* s->c.pict_type == AV_PICTURE_TYPE_B */ cbp = get_p_cbp(s, block, motion_x, motion_y); if ((cbp | motion_x | motion_y | s->dquant) == 0 && s->c.mv_type == MV_TYPE_16X16) { const MPVMainEncContext *const m = slice_to_mainenc(s); /* Check if the B-frames can skip it too, as we must skip it * if we skip here why didn't they just compress * the skip-mb bits instead of reusing them ?! */ if (m->max_b_frames > 0) { int x, y, offset; const uint8_t *p_pic; x = s->c.mb_x * 16; y = s->c.mb_y * 16; offset = x + y * s->c.linesize; p_pic = s->new_pic->data[0] + offset; s->c.mb_skipped = 1; for (int i = 0; i < m->max_b_frames; i++) { const uint8_t *b_pic; int diff; const MPVPicture *pic = m->reordered_input_picture[i + 1]; if (!pic || pic->f->pict_type != AV_PICTURE_TYPE_B) break; b_pic = pic->f->data[0] + offset; if (!pic->shared) b_pic += INPLACE_OFFSET; if (x + 16 > s->c.width || y + 16 > s->c.height) { int x1, y1; int xe = FFMIN(16, s->c.width - x); int ye = FFMIN(16, s->c.height - y); diff = 0; for (y1 = 0; y1 < ye; y1++) { for (x1 = 0; x1 < xe; x1++) { diff += FFABS(p_pic[x1 + y1 * s->c.linesize] - b_pic[x1 + y1 * s->c.linesize]); } } diff = diff * 256 / (xe * ye); } else { diff = s->sad_cmp[0](NULL, p_pic, b_pic, s->c.linesize, 16); } if (diff > s->c.qscale * 70) { // FIXME check that 70 is optimal s->c.mb_skipped = 0; break; } } } else s->c.mb_skipped = 1; if (s->c.mb_skipped == 1) { /* skip macroblock */ put_bits(&s->pb, 1, 1); if (interleaved_stats) { s->misc_bits++; s->last_bits++; } return; } } put_bits(&s->pb, 1, 0); /* mb coded */ cbpc = cbp & 3; cbpy = cbp >> 2; cbpy ^= 0xf; if (s->c.mv_type == MV_TYPE_16X16) { if (s->dquant) cbpc += 8; put_bits(&s->pb, ff_h263_inter_MCBPC_bits[cbpc], ff_h263_inter_MCBPC_code[cbpc]); put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); if (s->dquant) put_bits(pb2, 2, dquant_code[s->dquant + 2]); if (!s->c.progressive_sequence) { if (cbp) put_bits(pb2, 1, s->c.interlaced_dct); put_bits(pb2, 1, 0); } if (interleaved_stats) s->misc_bits += get_bits_diff(s); /* motion vectors: 16x16 mode */ ff_h263_pred_motion(&s->c, 0, 0, &pred_x, &pred_y); ff_h263_encode_motion_vector(s, motion_x - pred_x, motion_y - pred_y, s->f_code); } else if (s->c.mv_type == MV_TYPE_FIELD) { if (s->dquant) cbpc += 8; put_bits(&s->pb, ff_h263_inter_MCBPC_bits[cbpc], ff_h263_inter_MCBPC_code[cbpc]); put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); if (s->dquant) put_bits(pb2, 2, dquant_code[s->dquant + 2]); av_assert2(!s->c.progressive_sequence); if (cbp) put_bits(pb2, 1, s->c.interlaced_dct); put_bits(pb2, 1, 1); if (interleaved_stats) s->misc_bits += get_bits_diff(s); /* motion vectors: 16x8 interlaced mode */ ff_h263_pred_motion(&s->c, 0, 0, &pred_x, &pred_y); pred_y /= 2; put_bits(&s->pb, 1, s->c.field_select[0][0]); put_bits(&s->pb, 1, s->c.field_select[0][1]); ff_h263_encode_motion_vector(s, s->c.mv[0][0][0] - pred_x, s->c.mv[0][0][1] - pred_y, s->f_code); ff_h263_encode_motion_vector(s, s->c.mv[0][1][0] - pred_x, s->c.mv[0][1][1] - pred_y, s->f_code); } else { av_assert2(s->c.mv_type == MV_TYPE_8X8); put_bits(&s->pb, ff_h263_inter_MCBPC_bits[cbpc + 16], ff_h263_inter_MCBPC_code[cbpc + 16]); put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); if (!s->c.progressive_sequence && cbp) put_bits(pb2, 1, s->c.interlaced_dct); if (interleaved_stats) s->misc_bits += get_bits_diff(s); for (i = 0; i < 4; i++) { /* motion vectors: 8x8 mode*/ ff_h263_pred_motion(&s->c, i, 0, &pred_x, &pred_y); ff_h263_encode_motion_vector(s, s->c.cur_pic.motion_val[0][s->c.block_index[i]][0] - pred_x, s->c.cur_pic.motion_val[0][s->c.block_index[i]][1] - pred_y, s->f_code); } } if (interleaved_stats) s->mv_bits += get_bits_diff(s); mpeg4_encode_blocks_inter(s, block, tex_pb); if (interleaved_stats) s->p_tex_bits += get_bits_diff(s); } } else { int cbp; int dc_diff[6]; // dc values with the dc prediction subtracted int dir[6]; // prediction direction int zigzag_last_index[6]; const uint8_t *scan_table[6]; int i; for (int i = 0; i < 6; i++) { int pred = mpeg4_pred_dc(&s->c, i, &dir[i]); int scale = i < 4 ? s->c.y_dc_scale : s->c.c_dc_scale; pred = FASTDIV((pred + (scale >> 1)), scale); dc_diff[i] = block[i][0] - pred; s->c.dc_val[s->c.block_index[i]] = av_clip_uintp2(block[i][0] * scale, 11); } if (s->c.avctx->flags & AV_CODEC_FLAG_AC_PRED) { s->c.ac_pred = decide_ac_pred(s, block, dir, scan_table, zigzag_last_index); } else { for (i = 0; i < 6; i++) scan_table[i] = s->c.intra_scantable.permutated; } /* compute cbp */ cbp = 0; for (i = 0; i < 6; i++) if (s->c.block_last_index[i] >= 1) cbp |= 1 << (5 - i); cbpc = cbp & 3; if (s->c.pict_type == AV_PICTURE_TYPE_I) { if (s->dquant) cbpc += 4; put_bits(&s->pb, ff_h263_intra_MCBPC_bits[cbpc], ff_h263_intra_MCBPC_code[cbpc]); } else { if (s->dquant) cbpc += 8; put_bits(&s->pb, 1, 0); /* mb coded */ put_bits(&s->pb, ff_h263_inter_MCBPC_bits[cbpc + 4], ff_h263_inter_MCBPC_code[cbpc + 4]); } put_bits(pb2, 1, s->c.ac_pred); cbpy = cbp >> 2; put_bits(pb2, ff_h263_cbpy_tab[cbpy][1], ff_h263_cbpy_tab[cbpy][0]); if (s->dquant) put_bits(dc_pb, 2, dquant_code[s->dquant + 2]); if (!s->c.progressive_sequence) put_bits(dc_pb, 1, s->c.interlaced_dct); if (interleaved_stats) s->misc_bits += get_bits_diff(s); mpeg4_encode_blocks_intra(s, block, dc_diff, scan_table, dc_pb, tex_pb); if (interleaved_stats) s->i_tex_bits += get_bits_diff(s); s->i_count++; /* restore ac coeffs & last_index stuff * if we messed them up with the prediction */ if (s->c.ac_pred) restore_ac_coeffs(s, block, dir, scan_table, zigzag_last_index); } } /** * add MPEG-4 stuffing bits (01...1) */ void ff_mpeg4_stuffing(PutBitContext *pbc) { int length = 8 - (put_bits_count(pbc) & 7); put_bits(pbc, length, (1 << (length - 1)) - 1); } /* must be called before writing the header */ void ff_set_mpeg4_time(MPVEncContext *const s) { if (s->c.pict_type == AV_PICTURE_TYPE_B) { ff_mpeg4_init_direct_mv(&s->c); } else { s->c.last_time_base = s->c.time_base; s->c.time_base = FFUDIV(s->c.time, s->c.avctx->time_base.den); } } static void mpeg4_encode_gop_header(MPVMainEncContext *const m) { MPVEncContext *const s = &m->s; int64_t hours, minutes, seconds; int64_t time; put_bits32(&s->pb, GOP_STARTCODE); time = s->c.cur_pic.ptr->f->pts; if (m->reordered_input_picture[1]) time = FFMIN(time, m->reordered_input_picture[1]->f->pts); time = time * s->c.avctx->time_base.num; s->c.last_time_base = FFUDIV(time, s->c.avctx->time_base.den); seconds = FFUDIV(time, s->c.avctx->time_base.den); minutes = FFUDIV(seconds, 60); seconds = FFUMOD(seconds, 60); hours = FFUDIV(minutes, 60); minutes = FFUMOD(minutes, 60); hours = FFUMOD(hours , 24); put_bits(&s->pb, 5, hours); put_bits(&s->pb, 6, minutes); put_bits(&s->pb, 1, 1); put_bits(&s->pb, 6, seconds); put_bits(&s->pb, 1, !!(s->c.avctx->flags & AV_CODEC_FLAG_CLOSED_GOP)); put_bits(&s->pb, 1, 0); // broken link == NO ff_mpeg4_stuffing(&s->pb); } static void mpeg4_encode_visual_object_header(MPVMainEncContext *const m) { MPVEncContext *const s = &m->s; int profile_and_level_indication; int vo_ver_id; if (s->c.avctx->profile != AV_PROFILE_UNKNOWN) { profile_and_level_indication = s->c.avctx->profile << 4; } else if (m->max_b_frames || s->c.quarter_sample) { profile_and_level_indication = 0xF0; // adv simple } else { profile_and_level_indication = 0x00; // simple } if (s->c.avctx->level != AV_LEVEL_UNKNOWN) profile_and_level_indication |= s->c.avctx->level; else profile_and_level_indication |= 1; // level 1 if (profile_and_level_indication >> 4 == 0xF) vo_ver_id = 5; else vo_ver_id = 1; // FIXME levels put_bits32(&s->pb, VOS_STARTCODE); put_bits(&s->pb, 8, profile_and_level_indication); put_bits32(&s->pb, VISUAL_OBJ_STARTCODE); put_bits(&s->pb, 1, 1); put_bits(&s->pb, 4, vo_ver_id); put_bits(&s->pb, 3, 1); // priority put_bits(&s->pb, 4, 1); // visual obj type== video obj put_bits(&s->pb, 1, 0); // video signal type == no clue // FIXME ff_mpeg4_stuffing(&s->pb); } static void mpeg4_encode_vol_header(Mpeg4EncContext *const m4, int vo_number, int vol_number) { MPVEncContext *const s = &m4->m.s; int vo_ver_id, vo_type, aspect_ratio_info; if (m4->m.max_b_frames || s->c.quarter_sample) { vo_ver_id = 5; vo_type = ADV_SIMPLE_VO_TYPE; } else { vo_ver_id = 1; vo_type = SIMPLE_VO_TYPE; } put_bits32(&s->pb, 0x100 + vo_number); /* video obj */ put_bits32(&s->pb, 0x120 + vol_number); /* video obj layer */ put_bits(&s->pb, 1, 0); /* random access vol */ put_bits(&s->pb, 8, vo_type); /* video obj type indication */ put_bits(&s->pb, 1, 1); /* is obj layer id= yes */ put_bits(&s->pb, 4, vo_ver_id); /* is obj layer ver id */ put_bits(&s->pb, 3, 1); /* is obj layer priority */ aspect_ratio_info = ff_h263_aspect_to_info(s->c.avctx->sample_aspect_ratio); put_bits(&s->pb, 4, aspect_ratio_info); /* aspect ratio info */ if (aspect_ratio_info == FF_ASPECT_EXTENDED) { av_reduce(&s->c.avctx->sample_aspect_ratio.num, &s->c.avctx->sample_aspect_ratio.den, s->c.avctx->sample_aspect_ratio.num, s->c.avctx->sample_aspect_ratio.den, 255); put_bits(&s->pb, 8, s->c.avctx->sample_aspect_ratio.num); put_bits(&s->pb, 8, s->c.avctx->sample_aspect_ratio.den); } put_bits(&s->pb, 1, 1); /* vol control parameters= yes */ put_bits(&s->pb, 2, 1); /* chroma format YUV 420/YV12 */ put_bits(&s->pb, 1, s->c.low_delay); put_bits(&s->pb, 1, 0); /* vbv parameters= no */ put_bits(&s->pb, 2, RECT_SHAPE); /* vol shape= rectangle */ put_bits(&s->pb, 1, 1); /* marker bit */ put_bits(&s->pb, 16, s->c.avctx->time_base.den); if (m4->time_increment_bits < 1) m4->time_increment_bits = 1; put_bits(&s->pb, 1, 1); /* marker bit */ put_bits(&s->pb, 1, 0); /* fixed vop rate=no */ put_bits(&s->pb, 1, 1); /* marker bit */ put_bits(&s->pb, 13, s->c.width); /* vol width */ put_bits(&s->pb, 1, 1); /* marker bit */ put_bits(&s->pb, 13, s->c.height); /* vol height */ put_bits(&s->pb, 1, 1); /* marker bit */ put_bits(&s->pb, 1, s->c.progressive_sequence ? 0 : 1); put_bits(&s->pb, 1, 1); /* obmc disable */ if (vo_ver_id == 1) put_bits(&s->pb, 1, 0); /* sprite enable */ else put_bits(&s->pb, 2, 0); /* sprite enable */ put_bits(&s->pb, 1, 0); /* not 8 bit == false */ put_bits(&s->pb, 1, s->mpeg_quant); /* quant type = (0 = H.263 style) */ if (s->mpeg_quant) { ff_write_quant_matrix(&s->pb, s->c.avctx->intra_matrix); ff_write_quant_matrix(&s->pb, s->c.avctx->inter_matrix); } if (vo_ver_id != 1) put_bits(&s->pb, 1, s->c.quarter_sample); put_bits(&s->pb, 1, 1); /* complexity estimation disable */ put_bits(&s->pb, 1, s->rtp_mode ? 0 : 1); /* resync marker disable */ put_bits(&s->pb, 1, s->data_partitioning); if (s->data_partitioning) put_bits(&s->pb, 1, 0); /* no rvlc */ if (vo_ver_id != 1) { put_bits(&s->pb, 1, 0); /* newpred */ put_bits(&s->pb, 1, 0); /* reduced res vop */ } put_bits(&s->pb, 1, 0); /* scalability */ ff_mpeg4_stuffing(&s->pb); /* user data */ if (!(s->c.avctx->flags & AV_CODEC_FLAG_BITEXACT)) { put_bits32(&s->pb, USER_DATA_STARTCODE); ff_put_string(&s->pb, LIBAVCODEC_IDENT, 0); } } /* write MPEG-4 VOP header */ static int mpeg4_encode_picture_header(MPVMainEncContext *const m) { Mpeg4EncContext *const m4 = mainctx_to_mpeg4(m); MPVEncContext *const s = &m->s; uint64_t time_incr; int64_t time_div, time_mod; put_bits_assume_flushed(&s->pb); if (s->c.pict_type == AV_PICTURE_TYPE_I) { if (!(s->c.avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER)) { if (s->c.avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT) // HACK, the reference sw is buggy mpeg4_encode_visual_object_header(m); if (s->c.avctx->strict_std_compliance < FF_COMPLIANCE_VERY_STRICT || s->picture_number == 0) // HACK, the reference sw is buggy mpeg4_encode_vol_header(m4, 0, 0); } mpeg4_encode_gop_header(m); } s->partitioned_frame = s->data_partitioning && s->c.pict_type != AV_PICTURE_TYPE_B; put_bits32(&s->pb, VOP_STARTCODE); /* vop header */ put_bits(&s->pb, 2, s->c.pict_type - 1); /* pict type: I = 0 , P = 1 */ time_div = FFUDIV(s->c.time, s->c.avctx->time_base.den); time_mod = FFUMOD(s->c.time, s->c.avctx->time_base.den); time_incr = time_div - s->c.last_time_base; // This limits the frame duration to max 1 day if (time_incr > 3600*24) { av_log(s->c.avctx, AV_LOG_ERROR, "time_incr %"PRIu64" too large\n", time_incr); return AVERROR(EINVAL); } while (time_incr--) put_bits(&s->pb, 1, 1); put_bits(&s->pb, 1, 0); put_bits(&s->pb, 1, 1); /* marker */ put_bits(&s->pb, m4->time_increment_bits, time_mod); /* time increment */ put_bits(&s->pb, 1, 1); /* marker */ put_bits(&s->pb, 1, 1); /* vop coded */ if (s->c.pict_type == AV_PICTURE_TYPE_P) { put_bits(&s->pb, 1, s->c.no_rounding); /* rounding type */ } put_bits(&s->pb, 3, 0); /* intra dc VLC threshold */ if (!s->c.progressive_sequence) { put_bits(&s->pb, 1, !!(s->c.cur_pic.ptr->f->flags & AV_FRAME_FLAG_TOP_FIELD_FIRST)); put_bits(&s->pb, 1, s->c.alternate_scan); } // FIXME sprite stuff put_bits(&s->pb, 5, s->c.qscale); if (s->c.pict_type != AV_PICTURE_TYPE_I) put_bits(&s->pb, 3, s->f_code); /* fcode_for */ if (s->c.pict_type == AV_PICTURE_TYPE_B) put_bits(&s->pb, 3, s->b_code); /* fcode_back */ return 0; } static av_cold void init_uni_dc_tab(void) { int level, uni_code, uni_len; for (level = -256; level < 256; level++) { int size, v, l; /* find number of bits */ size = 0; v = abs(level); while (v) { v >>= 1; size++; } if (level < 0) l = (-level) ^ ((1 << size) - 1); else l = level; /* luminance */ uni_code = ff_mpeg4_DCtab_lum[size][0]; uni_len = ff_mpeg4_DCtab_lum[size][1]; if (size > 0) { uni_code <<= size; uni_code |= l; uni_len += size; if (size > 8) { uni_code <<= 1; uni_code |= 1; uni_len++; } } uni_DCtab_lum_bits[level + 256] = uni_code; uni_DCtab_lum_len[level + 256] = uni_len; /* chrominance */ uni_code = ff_mpeg4_DCtab_chrom[size][0]; uni_len = ff_mpeg4_DCtab_chrom[size][1]; if (size > 0) { uni_code <<= size; uni_code |= l; uni_len += size; if (size > 8) { uni_code <<= 1; uni_code |= 1; uni_len++; } } uni_DCtab_chrom_bits[level + 256] = uni_code; uni_DCtab_chrom_len[level + 256] = uni_len; } } static av_cold void init_uni_mpeg4_rl_tab(RLTable *rl, uint32_t *bits_tab, uint8_t *len_tab) { // Type 3 escape method. The escape code is the same for both VLCs // (0x3, seven bits), so it is hardcoded. memset(len_tab, 30, 2 * 2 * 64 * 64); len_tab += 64; bits_tab += 64; for (int run = 0; run < 64; ++run) { for (int level = 1;; ++level) { // Escape code type 3 not last run (6 bits) marker marker unsigned code = (3 << 23) | (3 << 21) | (0 << 20) | (run << 14) | (1 << 13) | 1; // first the negative levels bits_tab[UNI_MPEG4_ENC_INDEX(0, run, -level)] = code | (-level & 0xfff) << 1; bits_tab[UNI_MPEG4_ENC_INDEX(1, run, -level)] = bits_tab[UNI_MPEG4_ENC_INDEX(0, run, -level)] | (1 << 20) /* last */; if (level == 64) // positive levels have a range of 1..63 break; bits_tab[UNI_MPEG4_ENC_INDEX(0, run, level)] = code | level << 1; bits_tab[UNI_MPEG4_ENC_INDEX(1, run, level)] = bits_tab[UNI_MPEG4_ENC_INDEX(0, run, level)] | (1 << 20) /* last */; } // Is this needed at all? len_tab[UNI_MPEG4_ENC_INDEX(0, run, 0)] = len_tab[UNI_MPEG4_ENC_INDEX(1, run, 0)] = 0; } uint8_t max_run[2][32] = { 0 }; #define VLC_NUM_CODES 102 // excluding the escape av_assert2(rl->n == VLC_NUM_CODES); for (int i = VLC_NUM_CODES - 1, max_level, cur_run = 0; i >= 0; --i) { int run = rl->table_run[i], level = rl->table_level[i]; int last = i >= rl->last; unsigned code = rl->table_vlc[i][0] << 1; int len = rl->table_vlc[i][1] + 1; bits_tab[UNI_MPEG4_ENC_INDEX(last, run, level)] = code; len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] = len; bits_tab[UNI_MPEG4_ENC_INDEX(last, run, -level)] = code | 1; len_tab [UNI_MPEG4_ENC_INDEX(last, run, -level)] = len; if (!max_run[last][level]) max_run[last][level] = run + 1; av_assert2(run + 1 <= max_run[last][level]); int run3 = run + max_run[last][level]; int len3 = len + 7 + 2; if (run3 < 64 && len3 < len_tab[UNI_MPEG4_ENC_INDEX(last, run3, level)]) { unsigned code3 = code | (0x3 << 2 | 0x2) << len; bits_tab[UNI_MPEG4_ENC_INDEX(last, run3, level)] = code3; len_tab [UNI_MPEG4_ENC_INDEX(last, run3, level)] = len3; bits_tab[UNI_MPEG4_ENC_INDEX(last, run3, -level)] = code3 | 1; len_tab [UNI_MPEG4_ENC_INDEX(last, run3, -level)] = len3; } // table_run and table_level are ordered so that all the entries // with the same last and run are consecutive and level is ascending // among these entries. By traversing downwards we therefore automatically // encounter max_level of a given run first, needed for escape method 1. if (run != cur_run) { max_level = level; cur_run = run; } else av_assert2(max_level > level); code |= 0x3 << (len + 1); len += 7 + 1; level += max_level; av_assert2(len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] >= len); bits_tab[UNI_MPEG4_ENC_INDEX(last, run, level)] = code; len_tab [UNI_MPEG4_ENC_INDEX(last, run, level)] = len; bits_tab[UNI_MPEG4_ENC_INDEX(last, run, -level)] = code | 1; len_tab [UNI_MPEG4_ENC_INDEX(last, run, -level)] = len; } } static av_cold void mpeg4_encode_init_static(void) { init_uni_dc_tab(); init_uni_mpeg4_rl_tab(&ff_mpeg4_rl_intra, uni_mpeg4_intra_rl_bits, uni_mpeg4_intra_rl_len); init_uni_mpeg4_rl_tab(&ff_h263_rl_inter, uni_mpeg4_inter_rl_bits, uni_mpeg4_inter_rl_len); for (int f_code = MAX_FCODE; f_code > 0; f_code--) { for (int mv = -(16 << f_code); mv < (16 << f_code); mv++) fcode_tab[mv + MAX_MV] = f_code; } } static av_cold int encode_init(AVCodecContext *avctx) { static AVOnce init_static_once = AV_ONCE_INIT; Mpeg4EncContext *const m4 = avctx->priv_data; MPVMainEncContext *const m = &m4->m; MPVEncContext *const s = &m->s; int ret; if (avctx->width >= (1<<13) || avctx->height >= (1<<13)) { av_log(avctx, AV_LOG_ERROR, "dimensions too large for MPEG-4\n"); return AVERROR(EINVAL); } m->encode_picture_header = mpeg4_encode_picture_header; s->encode_mb = mpeg4_encode_mb; m->fcode_tab = fcode_tab + MAX_MV; s->min_qcoeff = -2048; s->max_qcoeff = 2047; s->intra_ac_vlc_length = uni_mpeg4_intra_rl_len; s->intra_ac_vlc_last_length = uni_mpeg4_intra_rl_len + 128 * 64; s->inter_ac_vlc_length = uni_mpeg4_inter_rl_len; s->inter_ac_vlc_last_length = uni_mpeg4_inter_rl_len + 128 * 64; s->luma_dc_vlc_length = uni_DCtab_lum_len; s->ac_esc_length = 7 + 2 + 1 + 6 + 1 + 12 + 1; s->c.y_dc_scale_table = ff_mpeg4_y_dc_scale_table; s->c.c_dc_scale_table = ff_mpeg4_c_dc_scale_table; ff_qpeldsp_init(&s->c.qdsp); if ((ret = ff_mpv_encode_init(avctx)) < 0) return ret; ff_thread_once(&init_static_once, mpeg4_encode_init_static); if (avctx->time_base.den > (1 << 16) - 1) { av_log(avctx, AV_LOG_ERROR, "timebase %d/%d not supported by MPEG 4 standard, " "the maximum admitted value for the timebase denominator " "is %d\n", avctx->time_base.num, avctx->time_base.den, (1 << 16) - 1); return AVERROR(EINVAL); } m4->time_increment_bits = av_log2(avctx->time_base.den - 1) + 1; if (avctx->flags & AV_CODEC_FLAG_GLOBAL_HEADER) { avctx->extradata = av_malloc(1024); if (!avctx->extradata) return AVERROR(ENOMEM); init_put_bits(&s->pb, avctx->extradata, 1024); mpeg4_encode_visual_object_header(m); mpeg4_encode_vol_header(m4, 0, 0); // ff_mpeg4_stuffing(&s->pb); ? flush_put_bits(&s->pb); avctx->extradata_size = put_bytes_output(&s->pb); } return 0; } void ff_mpeg4_init_partitions(MPVEncContext *const s) { uint8_t *start = put_bits_ptr(&s->pb); uint8_t *end = s->pb.buf_end; int size = end - start; int pb_size = (((intptr_t)start + size / 3) & (~3)) - (intptr_t)start; int tex_size = (size - 2 * pb_size) & (~3); set_put_bits_buffer_size(&s->pb, pb_size); init_put_bits(&s->tex_pb, start + pb_size, tex_size); init_put_bits(&s->pb2, start + pb_size + tex_size, pb_size); } void ff_mpeg4_merge_partitions(MPVEncContext *const s) { const int pb2_len = put_bits_count(&s->pb2); const int tex_pb_len = put_bits_count(&s->tex_pb); const int bits = put_bits_count(&s->pb); if (s->c.pict_type == AV_PICTURE_TYPE_I) { put_bits(&s->pb, 19, DC_MARKER); s->misc_bits += 19 + pb2_len + bits - s->last_bits; s->i_tex_bits += tex_pb_len; } else { put_bits(&s->pb, 17, MOTION_MARKER); s->misc_bits += 17 + pb2_len; s->mv_bits += bits - s->last_bits; s->p_tex_bits += tex_pb_len; } flush_put_bits(&s->pb2); flush_put_bits(&s->tex_pb); set_put_bits_buffer_size(&s->pb, s->pb2.buf_end - s->pb.buf); ff_copy_bits(&s->pb, s->pb2.buf, pb2_len); ff_copy_bits(&s->pb, s->tex_pb.buf, tex_pb_len); s->last_bits = put_bits_count(&s->pb); } void ff_mpeg4_encode_video_packet_header(MPVEncContext *const s) { int mb_num_bits = av_log2(s->c.mb_num - 1) + 1; put_bits(&s->pb, ff_mpeg4_get_video_packet_prefix_length(s->c.pict_type, s->f_code, s->b_code), 0); put_bits(&s->pb, 1, 1); put_bits(&s->pb, mb_num_bits, s->c.mb_x + s->c.mb_y * s->c.mb_width); put_bits(&s->pb, 5 /* quant_precision */, s->c.qscale); put_bits(&s->pb, 1, 0); /* no HEC */ } #define OFFSET(x) offsetof(MPVEncContext, x) #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM static const AVOption options[] = { { "data_partitioning", "Use data partitioning.", FF_MPV_OFFSET(data_partitioning), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, { "alternate_scan", "Enable alternate scantable.", OFFSET(c.alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, { "mpeg_quant", "Use MPEG quantizers instead of H.263", OFFSET(mpeg_quant), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, 1, VE }, FF_MPV_COMMON_BFRAME_OPTS FF_MPV_COMMON_OPTS FF_MPV_COMMON_MOTION_EST_OPTS FF_MPEG4_PROFILE_OPTS { NULL }, }; static const AVClass mpeg4enc_class = { .class_name = "MPEG4 encoder", .item_name = av_default_item_name, .option = options, .version = LIBAVUTIL_VERSION_INT, }; const FFCodec ff_mpeg4_encoder = { .p.name = "mpeg4", CODEC_LONG_NAME("MPEG-4 part 2"), .p.type = AVMEDIA_TYPE_VIDEO, .p.id = AV_CODEC_ID_MPEG4, .priv_data_size = sizeof(Mpeg4EncContext), .init = encode_init, FF_CODEC_ENCODE_CB(ff_mpv_encode_picture), .close = ff_mpv_encode_end, CODEC_PIXFMTS(AV_PIX_FMT_YUV420P), .color_ranges = AVCOL_RANGE_MPEG, .p.capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_DELAY | AV_CODEC_CAP_SLICE_THREADS | AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE, .caps_internal = FF_CODEC_CAP_INIT_CLEANUP, .p.priv_class = &mpeg4enc_class, };