3 * Copyright (c) 2000 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 #include "avio_internal.h"
30 #include "libavformat/avlanguage.h"
31 #include "libavutil/avstring.h"
32 #include "libavutil/intreadwrite.h"
33 #include "libavutil/dict.h"
34 #include "libavutil/avassert.h"
35 #include "libavutil/timestamp.h"
36 #include "libavutil/pixdesc.h"
37 #include "libavcodec/raw.h"
41 * - fill all fields if non streamed (nb_frames for example)
44 typedef struct AVIIentry {
45 unsigned int flags, pos, len;
48 #define AVI_INDEX_CLUSTER_SIZE 16384
50 typedef struct AVIIndex {
52 int64_t audio_strm_offset;
58 typedef struct AVIContext {
59 int64_t riff_start, movi_list, odml_list;
60 int64_t frames_hdr_all;
64 typedef struct AVIStream {
65 int64_t frames_hdr_strm;
66 int64_t audio_strm_length;
77 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt);
79 static inline AVIIentry *avi_get_ientry(const AVIIndex *idx, int ent_id)
81 int cl = ent_id / AVI_INDEX_CLUSTER_SIZE;
82 int id = ent_id % AVI_INDEX_CLUSTER_SIZE;
83 return &idx->cluster[cl][id];
86 static int64_t avi_start_new_riff(AVFormatContext *s, AVIOContext *pb,
87 const char *riff_tag, const char *list_tag)
89 AVIContext *avi = s->priv_data;
94 for (i = 0; i < s->nb_streams; i++) {
95 AVIStream *avist = s->streams[i]->priv_data;
96 avist->indexes.audio_strm_offset = avist->audio_strm_length;
97 avist->indexes.entry = 0;
100 avi->riff_start = ff_start_tag(pb, "RIFF");
101 ffio_wfourcc(pb, riff_tag);
102 loff = ff_start_tag(pb, "LIST");
103 ffio_wfourcc(pb, list_tag);
107 static char *avi_stream2fourcc(char *tag, int index, enum AVMediaType type)
109 tag[0] = '0' + index / 10;
110 tag[1] = '0' + index % 10;
111 if (type == AVMEDIA_TYPE_VIDEO) {
114 } else if (type == AVMEDIA_TYPE_SUBTITLE) {
115 // note: this is not an official code
126 static int avi_write_counters(AVFormatContext *s, int riff_id)
128 AVIOContext *pb = s->pb;
129 AVIContext *avi = s->priv_data;
130 int n, au_byterate, au_ssize, au_scale, nb_frames = 0;
132 AVCodecContext *stream;
134 file_size = avio_tell(pb);
135 for (n = 0; n < s->nb_streams; n++) {
136 AVIStream *avist = s->streams[n]->priv_data;
138 av_assert0(avist->frames_hdr_strm);
139 stream = s->streams[n]->codec;
140 avio_seek(pb, avist->frames_hdr_strm, SEEK_SET);
141 ff_parse_specific_params(s->streams[n], &au_byterate, &au_ssize, &au_scale);
143 avio_wl32(pb, avist->packet_count);
145 avio_wl32(pb, avist->audio_strm_length / au_ssize);
146 if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
147 nb_frames = FFMAX(nb_frames, avist->packet_count);
150 av_assert0(avi->frames_hdr_all);
151 avio_seek(pb, avi->frames_hdr_all, SEEK_SET);
152 avio_wl32(pb, nb_frames);
154 avio_seek(pb, file_size, SEEK_SET);
159 static void write_odml_master(AVFormatContext *s, int stream_index)
161 AVIOContext *pb = s->pb;
162 AVStream *st = s->streams[stream_index];
163 AVCodecContext *enc = st->codec;
164 AVIStream *avist = st->priv_data;
165 unsigned char tag[5];
168 /* Starting to lay out AVI OpenDML master index.
169 * We want to make it JUNK entry for now, since we'd
170 * like to get away without making AVI an OpenDML one
171 * for compatibility reasons. */
172 avist->indexes.entry = avist->indexes.ents_allocated = 0;
173 avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
174 avio_wl16(pb, 4); /* wLongsPerEntry */
175 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
176 avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
177 avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
178 ffio_wfourcc(pb, avi_stream2fourcc(tag, stream_index, enc->codec_type));
180 avio_wl64(pb, 0); /* dwReserved[3] */
181 // avio_wl32(pb, 0); /* Must be 0. */
182 for (j = 0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
184 ff_end_tag(pb, avist->indexes.indx_start);
187 static int avi_write_header(AVFormatContext *s)
189 AVIContext *avi = s->priv_data;
190 AVIOContext *pb = s->pb;
191 int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
192 AVCodecContext *video_enc;
193 AVStream *video_st = NULL;
194 int64_t list1, list2, strh, strf;
195 AVDictionaryEntry *t = NULL;
198 if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
199 av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
200 AVI_MAX_STREAM_COUNT);
201 return AVERROR(EINVAL);
204 for (n = 0; n < s->nb_streams; n++) {
205 s->streams[n]->priv_data = av_mallocz(sizeof(AVIStream));
206 if (!s->streams[n]->priv_data)
207 return AVERROR(ENOMEM);
212 list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
215 ffio_wfourcc(pb, "avih");
216 avio_wl32(pb, 14 * 4);
220 for (n = 0; n < s->nb_streams; n++) {
221 AVCodecContext *codec = s->streams[n]->codec;
222 bitrate += codec->bit_rate;
223 if (codec->codec_type == AVMEDIA_TYPE_VIDEO) {
225 video_st = s->streams[n];
231 // TODO: should be avg_frame_rate
233 avio_wl32(pb, (uint32_t) (INT64_C(1000000) * video_st->time_base.num /
234 video_st->time_base.den));
237 avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
238 avio_wl32(pb, 0); /* padding */
240 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
242 avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
243 avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
244 avio_wl32(pb, nb_frames); /* nb frames, filled later */
245 avio_wl32(pb, 0); /* initial frame */
246 avio_wl32(pb, s->nb_streams); /* nb streams */
247 avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
249 avio_wl32(pb, video_enc->width);
250 avio_wl32(pb, video_enc->height);
255 avio_wl32(pb, 0); /* reserved */
256 avio_wl32(pb, 0); /* reserved */
257 avio_wl32(pb, 0); /* reserved */
258 avio_wl32(pb, 0); /* reserved */
261 for (i = 0; i < n; i++) {
262 AVStream *st = s->streams[i];
263 AVCodecContext *enc = st->codec;
264 AVIStream *avist = st->priv_data;
265 list2 = ff_start_tag(pb, "LIST");
266 ffio_wfourcc(pb, "strl");
268 /* stream generic header */
269 strh = ff_start_tag(pb, "strh");
270 switch (enc->codec_type) {
271 case AVMEDIA_TYPE_SUBTITLE:
272 // XSUB subtitles behave like video tracks, other subtitles
273 // are not (yet) supported.
274 if (enc->codec_id != AV_CODEC_ID_XSUB) {
275 av_log(s, AV_LOG_ERROR,
276 "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
277 return AVERROR_PATCHWELCOME;
279 case AVMEDIA_TYPE_VIDEO:
280 ffio_wfourcc(pb, "vids");
282 case AVMEDIA_TYPE_AUDIO:
283 ffio_wfourcc(pb, "auds");
285 // case AVMEDIA_TYPE_TEXT:
286 // ffio_wfourcc(pb, "txts");
288 case AVMEDIA_TYPE_DATA:
289 ffio_wfourcc(pb, "dats");
292 if (enc->codec_type == AVMEDIA_TYPE_VIDEO ||
293 enc->codec_id == AV_CODEC_ID_XSUB)
294 avio_wl32(pb, enc->codec_tag);
297 avio_wl32(pb, 0); /* flags */
298 avio_wl16(pb, 0); /* priority */
299 avio_wl16(pb, 0); /* language */
300 avio_wl32(pb, 0); /* initial frame */
302 ff_parse_specific_params(st, &au_byterate, &au_ssize, &au_scale);
304 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
305 && enc->codec_id != AV_CODEC_ID_XSUB
306 && au_byterate > 1000LL*au_scale) {
310 avpriv_set_pts_info(st, 64, au_scale, au_byterate);
311 if (enc->codec_id == AV_CODEC_ID_XSUB)
312 au_scale = au_byterate = 0;
314 avio_wl32(pb, au_scale); /* scale */
315 avio_wl32(pb, au_byterate); /* rate */
317 avio_wl32(pb, 0); /* start */
318 /* remember this offset to fill later */
319 avist->frames_hdr_strm = avio_tell(pb);
321 /* FIXME: this may be broken, but who cares */
322 avio_wl32(pb, AVI_MAX_RIFF_SIZE);
324 avio_wl32(pb, 0); /* length, XXX: filled later */
326 /* suggested buffer size, is set to largest chunk size in avi_write_trailer */
327 if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
328 avio_wl32(pb, 1024 * 1024);
329 else if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
330 avio_wl32(pb, 12 * 1024);
333 avio_wl32(pb, -1); /* quality */
334 avio_wl32(pb, au_ssize); /* sample size */
336 avio_wl16(pb, enc->width);
337 avio_wl16(pb, enc->height);
338 ff_end_tag(pb, strh);
340 if (enc->codec_type != AVMEDIA_TYPE_DATA) {
342 enum AVPixelFormat pix_fmt;
344 strf = ff_start_tag(pb, "strf");
345 switch (enc->codec_type) {
346 case AVMEDIA_TYPE_SUBTITLE:
347 /* XSUB subtitles behave like video tracks, other subtitles
348 * are not (yet) supported. */
349 if (enc->codec_id != AV_CODEC_ID_XSUB)
351 case AVMEDIA_TYPE_VIDEO:
352 /* WMP expects RGB 5:5:5 rawvideo in avi to have bpp set to 16. */
354 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
355 && enc->pix_fmt == AV_PIX_FMT_RGB555LE
356 && enc->bits_per_coded_sample == 15)
357 enc->bits_per_coded_sample = 16;
358 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 0, 0);
359 pix_fmt = avpriv_find_pix_fmt(avpriv_pix_fmt_bps_avi,
360 enc->bits_per_coded_sample);
362 && enc->codec_id == AV_CODEC_ID_RAWVIDEO
363 && enc->pix_fmt != pix_fmt
364 && enc->pix_fmt != AV_PIX_FMT_NONE)
365 av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to avi, output file will be unreadable\n",
366 av_get_pix_fmt_name(enc->pix_fmt));
368 case AVMEDIA_TYPE_AUDIO:
369 if ((ret = ff_put_wav_header(pb, enc, 0)) < 0)
373 av_log(s, AV_LOG_ERROR,
374 "Invalid or not supported codec type '%s' found in the input\n",
375 (char *)av_x_if_null(av_get_media_type_string(enc->codec_type), "?"));
376 return AVERROR(EINVAL);
378 ff_end_tag(pb, strf);
379 if ((t = av_dict_get(st->metadata, "title", NULL, 0))) {
380 ff_riff_write_info_tag(s->pb, "strn", t->value);
383 if (enc->codec_id == AV_CODEC_ID_XSUB
384 && (t = av_dict_get(s->streams[i]->metadata, "language", NULL, 0))) {
385 const char* langstr = av_convert_lang_to(t->value, AV_LANG_ISO639_1);
388 char* str = av_asprintf("Subtitle - %s-xx;02", langstr);
389 ff_riff_write_info_tag(s->pb, "strn", str);
396 write_odml_master(s, i);
399 if (enc->codec_type == AVMEDIA_TYPE_VIDEO &&
400 st->sample_aspect_ratio.num > 0 &&
401 st->sample_aspect_ratio.den > 0) {
402 int vprp = ff_start_tag(pb, "vprp");
403 AVRational dar = av_mul_q(st->sample_aspect_ratio,
404 (AVRational) { enc->width,
407 av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
409 avio_wl32(pb, 0); // video format = unknown
410 avio_wl32(pb, 0); // video standard = unknown
411 // TODO: should be avg_frame_rate
412 avio_wl32(pb, lrintf(1.0 / av_q2d(st->time_base)));
413 avio_wl32(pb, enc->width);
414 avio_wl32(pb, enc->height);
417 avio_wl32(pb, enc->width);
418 avio_wl32(pb, enc->height);
419 avio_wl32(pb, 1); // progressive FIXME
421 avio_wl32(pb, enc->height);
422 avio_wl32(pb, enc->width);
423 avio_wl32(pb, enc->height);
424 avio_wl32(pb, enc->width);
430 ff_end_tag(pb, vprp);
433 ff_end_tag(pb, list2);
437 /* AVI could become an OpenDML one, if it grows beyond 2Gb range */
438 avi->odml_list = ff_start_tag(pb, "JUNK");
439 ffio_wfourcc(pb, "odml");
440 ffio_wfourcc(pb, "dmlh");
442 for (i = 0; i < 248; i += 4)
444 ff_end_tag(pb, avi->odml_list);
447 ff_end_tag(pb, list1);
449 ff_riff_write_info(s);
452 padding = s->metadata_header_padding;
456 /* some padding for easier tag editing */
458 list2 = ff_start_tag(pb, "JUNK");
459 for (i = padding; i > 0; i -= 4)
461 ff_end_tag(pb, list2);
464 avi->movi_list = ff_start_tag(pb, "LIST");
465 ffio_wfourcc(pb, "movi");
472 static int avi_write_ix(AVFormatContext *s)
474 AVIOContext *pb = s->pb;
475 AVIContext *avi = s->priv_data;
477 char ix_tag[] = "ix00";
480 av_assert0(pb->seekable);
482 if (avi->riff_id > AVI_MASTER_INDEX_SIZE) {
483 av_log(s, AV_LOG_ERROR, "Invalid riff index %d > %d\n",
484 avi->riff_id, AVI_MASTER_INDEX_SIZE);
485 return AVERROR(EINVAL);
488 for (i = 0; i < s->nb_streams; i++) {
489 AVIStream *avist = s->streams[i]->priv_data;
491 int au_byterate, au_ssize, au_scale;
493 avi_stream2fourcc(tag, i, s->streams[i]->codec->codec_type);
496 /* Writing AVI OpenDML leaf index chunk */
498 ffio_wfourcc(pb, ix_tag); /* ix?? */
499 avio_wl32(pb, avist->indexes.entry * 8 + 24);
501 avio_wl16(pb, 2); /* wLongsPerEntry */
502 avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
503 avio_w8(pb, 1); /* bIndexType (1 == AVI_INDEX_OF_CHUNKS) */
504 avio_wl32(pb, avist->indexes.entry);
506 ffio_wfourcc(pb, tag); /* dwChunkId */
507 avio_wl64(pb, avi->movi_list); /* qwBaseOffset */
508 avio_wl32(pb, 0); /* dwReserved_3 (must be 0) */
510 for (j = 0; j < avist->indexes.entry; j++) {
511 AVIIentry *ie = avi_get_ientry(&avist->indexes, j);
512 avio_wl32(pb, ie->pos + 8);
513 avio_wl32(pb, ((uint32_t) ie->len & ~0x80000000) |
514 (ie->flags & 0x10 ? 0 : 0x80000000));
519 /* Updating one entry in the AVI OpenDML master index */
520 avio_seek(pb, avist->indexes.indx_start - 8, SEEK_SET);
521 ffio_wfourcc(pb, "indx"); /* enabling this entry */
523 avio_wl32(pb, avi->riff_id); /* nEntriesInUse */
524 avio_skip(pb, 16 * avi->riff_id);
525 avio_wl64(pb, ix); /* qwOffset */
526 avio_wl32(pb, pos - ix); /* dwSize */
527 ff_parse_specific_params(s->streams[i], &au_byterate, &au_ssize, &au_scale);
528 if (s->streams[i]->codec->codec_type == AVMEDIA_TYPE_AUDIO && au_ssize > 0) {
529 uint32_t audio_segm_size = (avist->audio_strm_length - avist->indexes.audio_strm_offset);
530 if ((audio_segm_size % au_ssize > 0) && !avist->sample_requested) {
531 avpriv_request_sample(s, "OpenDML index duration for audio packets with partial frames");
532 avist->sample_requested = 1;
534 avio_wl32(pb, audio_segm_size / au_ssize); /* dwDuration (sample count) */
536 avio_wl32(pb, avist->indexes.entry); /* dwDuration (packet count) */
538 avio_seek(pb, pos, SEEK_SET);
543 static int avi_write_idx1(AVFormatContext *s)
545 AVIOContext *pb = s->pb;
546 AVIContext *avi = s->priv_data;
553 AVIIentry *ie = 0, *tie;
554 int empty, stream_id = -1;
556 idx_chunk = ff_start_tag(pb, "idx1");
557 for (i = 0; i < s->nb_streams; i++) {
558 avist = s->streams[i]->priv_data;
564 for (i = 0; i < s->nb_streams; i++) {
565 avist = s->streams[i]->priv_data;
566 if (avist->indexes.entry <= avist->entry)
569 tie = avi_get_ientry(&avist->indexes, avist->entry);
570 if (empty || tie->pos < ie->pos) {
577 avist = s->streams[stream_id]->priv_data;
578 avi_stream2fourcc(tag, stream_id,
579 s->streams[stream_id]->codec->codec_type);
580 ffio_wfourcc(pb, tag);
581 avio_wl32(pb, ie->flags);
582 avio_wl32(pb, ie->pos);
583 avio_wl32(pb, ie->len);
587 ff_end_tag(pb, idx_chunk);
589 avi_write_counters(s, avi->riff_id);
594 static int write_skip_frames(AVFormatContext *s, int stream_index, int64_t dts)
596 AVIStream *avist = s->streams[stream_index]->priv_data;
597 AVCodecContext *enc = s->streams[stream_index]->codec;
599 av_dlog(s, "dts:%s packet_count:%d stream_index:%d\n", av_ts2str(dts), avist->packet_count, stream_index);
600 while (enc->block_align == 0 && dts != AV_NOPTS_VALUE &&
601 dts > avist->packet_count && enc->codec_id != AV_CODEC_ID_XSUB && avist->packet_count) {
602 AVPacket empty_packet;
604 if (dts - avist->packet_count > 60000) {
605 av_log(s, AV_LOG_ERROR, "Too large number of skipped frames %"PRId64" > 60000\n", dts - avist->packet_count);
606 return AVERROR(EINVAL);
609 av_init_packet(&empty_packet);
610 empty_packet.size = 0;
611 empty_packet.data = NULL;
612 empty_packet.stream_index = stream_index;
613 avi_write_packet(s, &empty_packet);
614 av_dlog(s, "dup dts:%s packet_count:%d\n", av_ts2str(dts), avist->packet_count);
620 static int avi_write_packet(AVFormatContext *s, AVPacket *pkt)
622 unsigned char tag[5];
623 unsigned int flags = 0;
624 const int stream_index = pkt->stream_index;
625 int size = pkt->size;
626 AVIContext *avi = s->priv_data;
627 AVIOContext *pb = s->pb;
628 AVIStream *avist = s->streams[stream_index]->priv_data;
629 AVCodecContext *enc = s->streams[stream_index]->codec;
632 if (enc->codec_id == AV_CODEC_ID_H264 && enc->codec_tag == MKTAG('H','2','6','4') && pkt->size) {
633 ret = ff_check_h264_startcode(s, s->streams[stream_index], pkt);
638 if ((ret = write_skip_frames(s, stream_index, pkt->dts)) < 0)
641 if (pkt->dts != AV_NOPTS_VALUE)
642 avist->last_dts = pkt->dts + pkt->duration;
644 avist->packet_count++;
646 // Make sure to put an OpenDML chunk when the file size exceeds the limits
648 (avio_tell(pb) - avi->riff_start > AVI_MAX_RIFF_SIZE)) {
650 ff_end_tag(pb, avi->movi_list);
652 if (avi->riff_id == 1)
655 ff_end_tag(pb, avi->riff_start);
656 avi->movi_list = avi_start_new_riff(s, pb, "AVIX", "movi");
659 avi_stream2fourcc(tag, stream_index, enc->codec_type);
660 if (pkt->flags & AV_PKT_FLAG_KEY)
662 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
663 avist->audio_strm_length += size;
665 if (s->pb->seekable) {
666 AVIIndex *idx = &avist->indexes;
667 int cl = idx->entry / AVI_INDEX_CLUSTER_SIZE;
668 int id = idx->entry % AVI_INDEX_CLUSTER_SIZE;
669 if (idx->ents_allocated <= idx->entry) {
670 idx->cluster = av_realloc_f(idx->cluster, sizeof(void*), cl+1);
672 idx->ents_allocated = 0;
674 return AVERROR(ENOMEM);
677 av_malloc(AVI_INDEX_CLUSTER_SIZE * sizeof(AVIIentry));
678 if (!idx->cluster[cl])
679 return AVERROR(ENOMEM);
680 idx->ents_allocated += AVI_INDEX_CLUSTER_SIZE;
683 idx->cluster[cl][id].flags = flags;
684 idx->cluster[cl][id].pos = avio_tell(pb) - avi->movi_list;
685 idx->cluster[cl][id].len = size;
686 avist->max_size = FFMAX(avist->max_size, size);
690 avio_write(pb, tag, 4);
692 avio_write(pb, pkt->data, size);
699 static int avi_write_trailer(AVFormatContext *s)
701 AVIContext *avi = s->priv_data;
702 AVIOContext *pb = s->pb;
704 int i, j, n, nb_frames;
707 for (i = 0; i < s->nb_streams; i++) {
708 AVIStream *avist = s->streams[i]->priv_data;
709 write_skip_frames(s, i, avist->last_dts);
713 if (avi->riff_id == 1) {
714 ff_end_tag(pb, avi->movi_list);
715 res = avi_write_idx1(s);
716 ff_end_tag(pb, avi->riff_start);
719 ff_end_tag(pb, avi->movi_list);
720 ff_end_tag(pb, avi->riff_start);
722 file_size = avio_tell(pb);
723 avio_seek(pb, avi->odml_list - 8, SEEK_SET);
724 ffio_wfourcc(pb, "LIST"); /* Making this AVI OpenDML one */
727 for (n = nb_frames = 0; n < s->nb_streams; n++) {
728 AVCodecContext *stream = s->streams[n]->codec;
729 AVIStream *avist = s->streams[n]->priv_data;
731 if (stream->codec_type == AVMEDIA_TYPE_VIDEO) {
732 if (nb_frames < avist->packet_count)
733 nb_frames = avist->packet_count;
735 if (stream->codec_id == AV_CODEC_ID_MP2 ||
736 stream->codec_id == AV_CODEC_ID_MP3)
737 nb_frames += avist->packet_count;
740 avio_wl32(pb, nb_frames);
741 avio_seek(pb, file_size, SEEK_SET);
743 avi_write_counters(s, avi->riff_id);
747 for (i = 0; i < s->nb_streams; i++) {
748 AVIStream *avist = s->streams[i]->priv_data;
749 for (j = 0; j < avist->indexes.ents_allocated / AVI_INDEX_CLUSTER_SIZE; j++)
750 av_freep(&avist->indexes.cluster[j]);
751 av_freep(&avist->indexes.cluster);
752 avist->indexes.ents_allocated = avist->indexes.entry = 0;
754 avio_seek(pb, avist->frames_hdr_strm + 4, SEEK_SET);
755 avio_wl32(pb, avist->max_size);
762 AVOutputFormat ff_avi_muxer = {
764 .long_name = NULL_IF_CONFIG_SMALL("AVI (Audio Video Interleaved)"),
765 .mime_type = "video/x-msvideo",
767 .priv_data_size = sizeof(AVIContext),
768 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_AC3,
769 .video_codec = AV_CODEC_ID_MPEG4,
770 .write_header = avi_write_header,
771 .write_packet = avi_write_packet,
772 .write_trailer = avi_write_trailer,
773 .codec_tag = (const AVCodecTag * const []) {
774 ff_codec_bmp_tags, ff_codec_wav_tags, 0