4bf90e095b
To make it consistent with other muxers. The user can still control the generic flushing behaviour after write_header (same way as after packets) using the -flush_packets option, the default typically means to flush unless a non-streamed file output is used. Therefore this change should have no adverse effect on streaming, even if it is assumed that the first packet has a clean buffer, so small seekbacks within the output buffer work even when the IO context is not seekable. Signed-off-by: Marton Balint <cus@passwd.hu>
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
/*
|
|
* MicroDVD subtitle muxer
|
|
* Copyright (c) 2010 Aurelien Jacobs <aurel@gnuage.org>
|
|
*
|
|
* 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 <inttypes.h>
|
|
#include "avformat.h"
|
|
#include "internal.h"
|
|
|
|
static int microdvd_write_header(struct AVFormatContext *s)
|
|
{
|
|
AVCodecParameters *par = s->streams[0]->codecpar;
|
|
AVRational framerate = s->streams[0]->avg_frame_rate;
|
|
|
|
if (s->nb_streams != 1 || par->codec_id != AV_CODEC_ID_MICRODVD) {
|
|
av_log(s, AV_LOG_ERROR, "Exactly one MicroDVD stream is needed.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (par->extradata && par->extradata_size > 0) {
|
|
avio_write(s->pb, "{DEFAULT}{}", 11);
|
|
avio_write(s->pb, par->extradata, par->extradata_size);
|
|
avio_w8(s->pb, '\n');
|
|
}
|
|
|
|
avpriv_set_pts_info(s->streams[0], 64, framerate.num, framerate.den);
|
|
return 0;
|
|
}
|
|
|
|
static int microdvd_write_packet(AVFormatContext *avf, AVPacket *pkt)
|
|
{
|
|
avio_printf(avf->pb, "{%"PRId64"}", pkt->pts);
|
|
if (pkt->duration < 0)
|
|
avio_write(avf->pb, "{}", 2);
|
|
else
|
|
avio_printf(avf->pb, "{%"PRId64"}", pkt->pts + pkt->duration);
|
|
avio_write(avf->pb, pkt->data, pkt->size);
|
|
avio_w8(avf->pb, '\n');
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat ff_microdvd_muxer = {
|
|
.name = "microdvd",
|
|
.long_name = NULL_IF_CONFIG_SMALL("MicroDVD subtitle format"),
|
|
.mime_type = "text/x-microdvd",
|
|
.extensions = "sub",
|
|
.write_header = microdvd_write_header,
|
|
.write_packet = microdvd_write_packet,
|
|
.flags = AVFMT_NOTIMESTAMPS,
|
|
.subtitle_codec = AV_CODEC_ID_MICRODVD,
|
|
};
|