static AVFrame *get_video_frame(OutputStream *ost)
{
AVCodecContext *c = ost->st->codec;
/* check if we want to generate more frames */
if (av_compare_ts(ost->next_pts, ost->st->codec->time_base,
STREAM_DURATION, av_create_rational( 1, 1 )) >= 0)
return NULL;
if (c->pix_fmt != AV_PIX_FMT_YUV420P) {
/* as we only generate a YUV420P picture, we must convert it
* to the codec pixel format if needed */
if (!ost->sws_ctx) {
ost->sws_ctx = sws_getContext(c->width, c->height,
AV_PIX_FMT_YUV420P,
c->width, c->height,
c->pix_fmt,
SCALE_FLAGS, NULL, NULL, NULL);
if (!ost->sws_ctx) {
fprintf(stderr,
"Could not initialize the conversion context\n");
exit(1);
}
}
fill_yuv_image(ost->tmp_frame, ost->next_pts, c->width, c->height);
sws_scale(ost->sws_ctx,
(const uint8_t * const *)ost->tmp_frame->data, ost->tmp_frame->linesize,
0, c->height, ost->frame->data, ost->frame->linesize);
} else {
fill_yuv_image(ost->frame, ost->next_pts, c->width, c->height);
}
ost->frame->pts = ost->next_pts++;
return ost->frame;
}
/* MPEG-1/H.263 input */
static int video_read_header(AVFormatContext *s,
AVFormatParameters *ap)
{
AVStream *st;
st = av_new_stream(s, 0);
if (!st)
return AVERROR(ENOMEM);
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
st->codec->codec_id = s->iformat->value;
st->need_parsing = AVSTREAM_PARSE_FULL;
/* for MJPEG, specify frame rate */
/* for MPEG-4 specify it, too (most MPEG-4 streams do not have the fixed_vop_rate set ...)*/
if (ap->time_base.num) {
st->codec->time_base= ap->time_base;
} else if ( st->codec->codec_id == CODEC_ID_MJPEG ||
st->codec->codec_id == CODEC_ID_MPEG4 ||
st->codec->codec_id == CODEC_ID_DIRAC ||
st->codec->codec_id == CODEC_ID_DNXHD ||
st->codec->codec_id == CODEC_ID_H264) {
#ifndef _MSC_VER
st->codec->time_base= (AVRational){1,25};
#else
st->codec->time_base= av_create_rational(1, 25);
#endif
}
av_set_pts_info(st, 64, 1, 1200000);
return 0;
}
/*
* encode one audio frame and send it to the muxer
* return 1 when encoding is finished, 0 otherwise
*/
static int write_audio_frame(AVFormatContext *oc, OutputStream *ost)
{
AVCodecContext *c;
AVPacket pkt = { 0 }; // data and size must be 0;
AVFrame *frame;
int ret;
int got_packet;
int dst_nb_samples;
av_init_packet(&pkt);
c = ost->st->codec;
frame = get_audio_frame(ost);
if (frame) {
/* convert samples from native format to destination codec format, using the resampler */
/* compute destination number of samples */
dst_nb_samples = av_rescale_rnd(swr_get_delay(ost->swr_ctx, c->sample_rate) + frame->nb_samples,
c->sample_rate, c->sample_rate, AV_ROUND_UP);
av_assert0(dst_nb_samples == frame->nb_samples);
/* when we pass a frame to the encoder, it may keep a reference to it
* internally;
* make sure we do not overwrite it here
*/
ret = av_frame_make_writable(ost->frame);
if (ret < 0)
exit(1);
/* convert to destination format */
ret = swr_convert(ost->swr_ctx,
ost->frame->data, dst_nb_samples,
(const uint8_t **)frame->data, frame->nb_samples);
if (ret < 0) {
fprintf(stderr, "Error while converting\n");
exit(1);
}
frame = ost->frame;
frame->pts = av_rescale_q(ost->samples_count, av_create_rational( 1, c->sample_rate ), c->time_base);
ost->samples_count += dst_nb_samples;
}
ret = avcodec_encode_audio2(c, &pkt, frame, &got_packet);
if (ret < 0) {
fprintf(stderr, "Error encoding audio frame: %s\n", av_err2str(ret));
exit(1);
}
if (got_packet) {
ret = write_frame(oc, &c->time_base, ost->st, &pkt);
if (ret < 0) {
fprintf(stderr, "Error while writing audio frame: %s\n",
av_err2str(ret));
exit(1);
}
}
return (frame || got_packet) ? 0 : 1;
}
void avcodec_get_context_defaults2(AVCodecContext *s, enum AVMediaType codec_type){
int flags=0;
memset(s, 0, sizeof(AVCodecContext));
s->av_class= &av_codec_context_class;
s->codec_type = codec_type;
if(codec_type == AVMEDIA_TYPE_AUDIO)
flags= AV_OPT_FLAG_AUDIO_PARAM;
else if(codec_type == AVMEDIA_TYPE_VIDEO)
flags= AV_OPT_FLAG_VIDEO_PARAM;
else if(codec_type == AVMEDIA_TYPE_SUBTITLE)
flags= AV_OPT_FLAG_SUBTITLE_PARAM;
av_opt_set_defaults2(s, flags, flags);
#ifndef _MSC_VER
s->time_base= (AVRational){0,1};
#else
s->time_base= av_create_rational(0,1);
#endif
s->get_buffer= avcodec_default_get_buffer;
s->release_buffer= avcodec_default_release_buffer;
s->get_format= avcodec_default_get_format;
s->execute= avcodec_default_execute;
s->execute2= avcodec_default_execute2;
#ifndef _MSC_VER
s->sample_aspect_ratio= (AVRational){0,1};
#else
s->sample_aspect_ratio= av_create_rational(0,1);
#endif
s->pix_fmt= PIX_FMT_NONE;
s->sample_fmt= SAMPLE_FMT_NONE;
s->palctrl = NULL;
s->reget_buffer= avcodec_default_reget_buffer;
s->reordered_opaque= AV_NOPTS_VALUE;
}
static int process_video_header_mdec(AVFormatContext *s)
{
EaDemuxContext *ea = s->priv_data;
ByteIOContext *pb = s->pb;
url_fskip(pb, 4);
ea->width = get_le16(pb);
ea->height = get_le16(pb);
#ifndef _MSC_VER
ea->time_base = (AVRational){1,15};
#else
ea->time_base = av_create_rational(1,15);
#endif
ea->video_codec = CODEC_ID_MDEC;
return 1;
}
static av_cold int tgq_decode_init(AVCodecContext *avctx){
TgqContext *s = avctx->priv_data;
s->avctx = avctx;
if(avctx->idct_algo==FF_IDCT_AUTO)
avctx->idct_algo=FF_IDCT_EA;
dsputil_init(&s->dsp, avctx);
ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct);
#ifndef _MSC_VER
avctx->time_base = (AVRational){1, 15};
#else
avctx->time_base = av_create_rational(1, 15);
#endif
avctx->pix_fmt = PIX_FMT_YUV420P;
return 0;
}
/* Prepare a 16 bit dummy audio frame of 'frame_size' samples and
* 'nb_channels' channels. */
static AVFrame *get_audio_frame(OutputStream *ost)
{
AVFrame *frame = ost->tmp_frame;
int j, i, v;
int16_t *q = (int16_t*)frame->data[0];
/* check if we want to generate more frames */
if (av_compare_ts(ost->next_pts, ost->st->codec->time_base,
STREAM_DURATION, av_create_rational( 1, 1)) >= 0)
return NULL;
for (j = 0; j <frame->nb_samples; j++) {
v = (int)(sin(ost->t) * 10000);
for (i = 0; i < ost->st->codec->channels; i++)
*q++ = v;
ost->t += ost->tincr;
ost->tincr += ost->tincr2;
}
frame->pts = ost->next_pts;
ost->next_pts += frame->nb_samples;
return frame;
}
/*
* Process EA file header
* Returns 1 if the EA file is valid and successfully opened, 0 otherwise
*/
static int process_ea_header(AVFormatContext *s) {
uint32_t blockid, size = 0;
EaDemuxContext *ea = s->priv_data;
ByteIOContext *pb = s->pb;
int i;
for (i=0; i<5 && (!ea->audio_codec || !ea->video_codec); i++) {
unsigned int startpos = url_ftell(pb);
int err = 0;
blockid = get_le32(pb);
size = get_le32(pb);
if (i == 0)
ea->big_endian = size > 0x000FFFFF;
if (ea->big_endian)
size = bswap_32(size);
switch (blockid) {
case ISNh_TAG:
if (get_le32(pb) != EACS_TAG) {
av_log (s, AV_LOG_ERROR, "unknown 1SNh headerid\n");
return 0;
}
err = process_audio_header_eacs(s);
break;
case SCHl_TAG :
case SHEN_TAG :
blockid = get_le32(pb);
if (blockid == GSTR_TAG) {
url_fskip(pb, 4);
} else if ((blockid & 0xFFFF)!=PT00_TAG) {
av_log (s, AV_LOG_ERROR, "unknown SCHl headerid\n");
return 0;
}
err = process_audio_header_elements(s);
break;
case SEAD_TAG:
err = process_audio_header_sead(s);
break;
case MVIh_TAG :
ea->video_codec = CODEC_ID_CMV;
#ifndef _MSC_VER
ea->time_base = (AVRational){0,0};
#else
ea->time_base = av_create_rational(0,0);
#endif
break;
case kVGT_TAG:
ea->video_codec = CODEC_ID_TGV;
#ifndef _MSC_VER
ea->time_base = (AVRational){0,0};
#else
ea->time_base.num = ea->time_base.den = 0;
#endif
break;
case mTCD_TAG :
err = process_video_header_mdec(s);
break;
case MPCh_TAG:
ea->video_codec = CODEC_ID_MPEG2VIDEO;
break;
case pQGT_TAG:
case TGQs_TAG:
ea->video_codec = CODEC_ID_TGQ;
break;
case pIQT_TAG:
ea->video_codec = CODEC_ID_TQI;
break;
case MADk_TAG :
ea->video_codec = CODEC_ID_MAD;
break;
case MVhd_TAG :
err = process_video_header_vp6(s);
break;
}
if (err < 0) {
av_log(s, AV_LOG_ERROR, "error parsing header: %i\n", err);
return err;
}
url_fseek(pb, startpos + size, SEEK_SET);
}
url_fseek(pb, 0, SEEK_SET);
return 1;
}
/**
* decodes the H261 picture header.
* @return <0 if no startcode found
*/
static int h261_decode_picture_header(H261Context *h){
MpegEncContext * const s = &h->s;
int format, i;
uint32_t startcode= 0;
for(i= get_bits_left(&s->gb); i>24; i-=1){
startcode = ((startcode << 1) | get_bits(&s->gb, 1)) & 0x000FFFFF;
if(startcode == 0x10)
break;
}
if (startcode != 0x10){
av_log(s->avctx, AV_LOG_ERROR, "Bad picture start code\n");
return -1;
}
/* temporal reference */
i= get_bits(&s->gb, 5); /* picture timestamp */
if(i < (s->picture_number&31))
i += 32;
s->picture_number = (s->picture_number&~31) + i;
#ifndef _MSC_VER
s->avctx->time_base= (AVRational){1001, 30000};
#else
//MSVC
s->avctx->time_base= av_create_rational(1001, 30000);
#endif
s->current_picture.pts= s->picture_number;
/* PTYPE starts here */
skip_bits1(&s->gb); /* split screen off */
skip_bits1(&s->gb); /* camera off */
skip_bits1(&s->gb); /* freeze picture release off */
format = get_bits1(&s->gb);
//only 2 formats possible
if (format == 0){//QCIF
s->width = 176;
s->height = 144;
s->mb_width = 11;
s->mb_height = 9;
}else{//CIF
s->width = 352;
s->height = 288;
s->mb_width = 22;
s->mb_height = 18;
}
s->mb_num = s->mb_width * s->mb_height;
skip_bits1(&s->gb); /* still image mode off */
skip_bits1(&s->gb); /* Reserved */
/* PEI */
while (get_bits1(&s->gb) != 0){
skip_bits(&s->gb, 8);
}
// h261 has no I-FRAMES, but if we pass FF_I_TYPE for the first frame, the codec crashes if it does
// not contain all I-blocks (e.g. when a packet is lost)
s->pict_type = FF_P_TYPE;
h->gob_number = 0;
return 0;
}
static int avi_write_header(AVFormatContext *s)
{
AVIContext *avi = s->priv_data;
AVIOContext *pb = s->pb;
int bitrate, n, i, nb_frames, au_byterate, au_ssize, au_scale;
AVCodecContext *stream, *video_enc;
int64_t list1, list2, strh, strf;
AVMetadataTag *t = NULL;
if (s->nb_streams > AVI_MAX_STREAM_COUNT) {
av_log(s, AV_LOG_ERROR, "AVI does not support >%d streams\n",
AVI_MAX_STREAM_COUNT);
return -1;
}
for(n=0;n<s->nb_streams;n++) {
s->streams[n]->priv_data= av_mallocz(sizeof(AVIStream));
if(!s->streams[n]->priv_data)
return AVERROR(ENOMEM);
}
/* header list */
avi->riff_id = 0;
list1 = avi_start_new_riff(s, pb, "AVI ", "hdrl");
/* avi header */
ffio_wfourcc(pb, "avih");
avio_wl32(pb, 14 * 4);
bitrate = 0;
video_enc = NULL;
for(n=0;n<s->nb_streams;n++) {
stream = s->streams[n]->codec;
bitrate += stream->bit_rate;
if (stream->codec_type == AVMEDIA_TYPE_VIDEO)
video_enc = stream;
}
nb_frames = 0;
if(video_enc){
avio_wl32(pb, (uint32_t)(INT64_C(1000000) * video_enc->time_base.num / video_enc->time_base.den));
} else {
avio_wl32(pb, 0);
}
avio_wl32(pb, bitrate / 8); /* XXX: not quite exact */
avio_wl32(pb, 0); /* padding */
if (!pb->seekable)
avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_ISINTERLEAVED); /* flags */
else
avio_wl32(pb, AVIF_TRUSTCKTYPE | AVIF_HASINDEX | AVIF_ISINTERLEAVED); /* flags */
avi->frames_hdr_all = avio_tell(pb); /* remember this offset to fill later */
avio_wl32(pb, nb_frames); /* nb frames, filled later */
avio_wl32(pb, 0); /* initial frame */
avio_wl32(pb, s->nb_streams); /* nb streams */
avio_wl32(pb, 1024 * 1024); /* suggested buffer size */
if(video_enc){
avio_wl32(pb, video_enc->width);
avio_wl32(pb, video_enc->height);
} else {
avio_wl32(pb, 0);
avio_wl32(pb, 0);
}
avio_wl32(pb, 0); /* reserved */
avio_wl32(pb, 0); /* reserved */
avio_wl32(pb, 0); /* reserved */
avio_wl32(pb, 0); /* reserved */
/* stream list */
for(i=0;i<n;i++) {
AVIStream *avist= s->streams[i]->priv_data;
list2 = ff_start_tag(pb, "LIST");
ffio_wfourcc(pb, "strl");
stream = s->streams[i]->codec;
/* stream generic header */
strh = ff_start_tag(pb, "strh");
switch(stream->codec_type) {
case AVMEDIA_TYPE_SUBTITLE:
// XSUB subtitles behave like video tracks, other subtitles
// are not (yet) supported.
if (stream->codec_id != CODEC_ID_XSUB) {
av_log(s, AV_LOG_ERROR, "Subtitle streams other than DivX XSUB are not supported by the AVI muxer.\n");
return AVERROR_PATCHWELCOME;
}
case AVMEDIA_TYPE_VIDEO: ffio_wfourcc(pb, "vids"); break;
case AVMEDIA_TYPE_AUDIO: ffio_wfourcc(pb, "auds"); break;
// case AVMEDIA_TYPE_TEXT : ffio_wfourcc(pb, "txts"); break;
case AVMEDIA_TYPE_DATA : ffio_wfourcc(pb, "dats"); break;
}
if(stream->codec_type == AVMEDIA_TYPE_VIDEO ||
stream->codec_id == CODEC_ID_XSUB)
avio_wl32(pb, stream->codec_tag);
else
avio_wl32(pb, 1);
avio_wl32(pb, 0); /* flags */
avio_wl16(pb, 0); /* priority */
avio_wl16(pb, 0); /* language */
avio_wl32(pb, 0); /* initial frame */
ff_parse_specific_params(stream, &au_byterate, &au_ssize, &au_scale);
avio_wl32(pb, au_scale); /* scale */
avio_wl32(pb, au_byterate); /* rate */
av_set_pts_info(s->streams[i], 64, au_scale, au_byterate);
avio_wl32(pb, 0); /* start */
avist->frames_hdr_strm = avio_tell(pb); /* remember this offset to fill later */
if (!pb->seekable)
avio_wl32(pb, AVI_MAX_RIFF_SIZE); /* FIXME: this may be broken, but who cares */
else
avio_wl32(pb, 0); /* length, XXX: filled later */
/* suggested buffer size */ //FIXME set at the end to largest chunk
if(stream->codec_type == AVMEDIA_TYPE_VIDEO)
avio_wl32(pb, 1024 * 1024);
else if(stream->codec_type == AVMEDIA_TYPE_AUDIO)
avio_wl32(pb, 12 * 1024);
else
avio_wl32(pb, 0);
avio_wl32(pb, -1); /* quality */
avio_wl32(pb, au_ssize); /* sample size */
avio_wl32(pb, 0);
avio_wl16(pb, stream->width);
avio_wl16(pb, stream->height);
ff_end_tag(pb, strh);
if(stream->codec_type != AVMEDIA_TYPE_DATA){
strf = ff_start_tag(pb, "strf");
switch(stream->codec_type) {
case AVMEDIA_TYPE_SUBTITLE:
// XSUB subtitles behave like video tracks, other subtitles
// are not (yet) supported.
if (stream->codec_id != CODEC_ID_XSUB) break;
case AVMEDIA_TYPE_VIDEO:
ff_put_bmp_header(pb, stream, ff_codec_bmp_tags, 0);
break;
case AVMEDIA_TYPE_AUDIO:
if (ff_put_wav_header(pb, stream) < 0) {
return -1;
}
break;
default:
return -1;
}
ff_end_tag(pb, strf);
if ((t = av_metadata_get(s->streams[i]->metadata, "title", NULL, 0))) {
avi_write_info_tag(s->pb, "strn", t->value);
t = NULL;
}
}
if (pb->seekable) {
unsigned char tag[5];
int j;
/* Starting to lay out AVI OpenDML master index.
* We want to make it JUNK entry for now, since we'd
* like to get away without making AVI an OpenDML one
* for compatibility reasons.
*/
avist->indexes.entry = avist->indexes.ents_allocated = 0;
avist->indexes.indx_start = ff_start_tag(pb, "JUNK");
avio_wl16(pb, 4); /* wLongsPerEntry */
avio_w8(pb, 0); /* bIndexSubType (0 == frame index) */
avio_w8(pb, 0); /* bIndexType (0 == AVI_INDEX_OF_INDEXES) */
avio_wl32(pb, 0); /* nEntriesInUse (will fill out later on) */
ffio_wfourcc(pb, avi_stream2fourcc(tag, i, stream->codec_type));
/* dwChunkId */
avio_wl64(pb, 0); /* dwReserved[3]
avio_wl32(pb, 0); Must be 0. */
for (j=0; j < AVI_MASTER_INDEX_SIZE * 2; j++)
avio_wl64(pb, 0);
ff_end_tag(pb, avist->indexes.indx_start);
}
if( stream->codec_type == AVMEDIA_TYPE_VIDEO
&& s->streams[i]->sample_aspect_ratio.num>0
&& s->streams[i]->sample_aspect_ratio.den>0){
int vprp= ff_start_tag(pb, "vprp");
AVRational dar = av_mul_q(s->streams[i]->sample_aspect_ratio,
av_create_rational(stream->width, stream->height));
int num, den;
av_reduce(&num, &den, dar.num, dar.den, 0xFFFF);
avio_wl32(pb, 0); //video format = unknown
avio_wl32(pb, 0); //video standard= unknown
avio_wl32(pb, lrintf(1.0/av_q2d(stream->time_base)));
avio_wl32(pb, stream->width );
avio_wl32(pb, stream->height);
avio_wl16(pb, den);
avio_wl16(pb, num);
avio_wl32(pb, stream->width );
avio_wl32(pb, stream->height);
avio_wl32(pb, 1); //progressive FIXME
avio_wl32(pb, stream->height);
avio_wl32(pb, stream->width );
avio_wl32(pb, stream->height);
avio_wl32(pb, stream->width );
avio_wl32(pb, 0);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
avio_wl32(pb, 0);
ff_end_tag(pb, vprp);
}
ff_end_tag(pb, list2);
}
if (pb->seekable) {
/* AVI could become an OpenDML one, if it grows beyond 2Gb range */
avi->odml_list = ff_start_tag(pb, "JUNK");
ffio_wfourcc(pb, "odml");
ffio_wfourcc(pb, "dmlh");
avio_wl32(pb, 248);
for (i = 0; i < 248; i+= 4)
avio_wl32(pb, 0);
ff_end_tag(pb, avi->odml_list);
}
ff_end_tag(pb, list1);
list2 = ff_start_tag(pb, "LIST");
ffio_wfourcc(pb, "INFO");
ff_metadata_conv(&s->metadata, ff_avi_metadata_conv, NULL);
for (i = 0; *ff_avi_tags[i]; i++) {
if ((t = av_metadata_get(s->metadata, ff_avi_tags[i], NULL, AV_METADATA_MATCH_CASE)))
avi_write_info_tag(s->pb, t->key, t->value);
}
ff_end_tag(pb, list2);
/* some padding for easier tag editing */
list2 = ff_start_tag(pb, "JUNK");
for (i = 0; i < 1016; i += 4)
avio_wl32(pb, 0);
ff_end_tag(pb, list2);
avi->movi_list = ff_start_tag(pb, "LIST");
ffio_wfourcc(pb, "movi");
avio_flush(pb);
return 0;
}
/* Add an output stream. */
static void add_stream(OutputStream *ost, AVFormatContext *oc,
AVCodec **codec,
enum AVCodecID codec_id)
{
AVCodecContext *c;
int i;
/* find the encoder */
*codec = avcodec_find_encoder(codec_id);
if (!(*codec)) {
fprintf(stderr, "Could not find encoder for '%s'\n",
avcodec_get_name(codec_id));
exit(1);
}
ost->st = avformat_new_stream(oc, *codec);
if (!ost->st) {
fprintf(stderr, "Could not allocate stream\n");
exit(1);
}
ost->st->id = oc->nb_streams-1;
c = ost->st->codec;
switch ((*codec)->type) {
case AVMEDIA_TYPE_AUDIO:
c->sample_fmt = (*codec)->sample_fmts ?
(*codec)->sample_fmts[0] : AV_SAMPLE_FMT_FLTP;
c->bit_rate = 64000;
c->sample_rate = 44100;
if ((*codec)->supported_samplerates) {
c->sample_rate = (*codec)->supported_samplerates[0];
for (i = 0; (*codec)->supported_samplerates[i]; i++) {
if ((*codec)->supported_samplerates[i] == 44100)
c->sample_rate = 44100;
}
}
c->channels = av_get_channel_layout_nb_channels(c->channel_layout);
c->channel_layout = AV_CH_LAYOUT_STEREO;
if ((*codec)->channel_layouts) {
c->channel_layout = (*codec)->channel_layouts[0];
for (i = 0; (*codec)->channel_layouts[i]; i++) {
if ((*codec)->channel_layouts[i] == AV_CH_LAYOUT_STEREO)
c->channel_layout = AV_CH_LAYOUT_STEREO;
}
}
c->channels = av_get_channel_layout_nb_channels(c->channel_layout);
ost->st->time_base = av_create_rational( 1, c->sample_rate );
break;
case AVMEDIA_TYPE_VIDEO:
c->codec_id = codec_id;
c->bit_rate = 400000;
/* Resolution must be a multiple of two. */
c->width = 352;
c->height = 288;
/* timebase: This is the fundamental unit of time (in seconds) in terms
* of which frame timestamps are represented. For fixed-fps content,
* timebase should be 1/framerate and timestamp increments should be
* identical to 1. */
ost->st->time_base = av_create_rational( 1, STREAM_FRAME_RATE);
c->time_base = ost->st->time_base;
c->gop_size = 12; /* emit one intra frame every twelve frames at most */
c->pix_fmt = STREAM_PIX_FMT;
if (c->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
/* just for testing, we also add B frames */
c->max_b_frames = 2;
}
if (c->codec_id == AV_CODEC_ID_MPEG1VIDEO) {
/* Needed to avoid using macroblocks in which some coeffs overflow.
* This does not happen with normal video, it just happens here as
* the motion of the chroma plane does not match the luma plane. */
c->mb_decision = 2;
}
break;
default:
break;
}
/* Some formats want stream headers to be separate. */
if (oc->oformat->flags & AVFMT_GLOBALHEADER)
c->flags |= CODEC_FLAG_GLOBAL_HEADER;
}
