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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>
71 lines
2.1 KiB
C
71 lines
2.1 KiB
C
/*
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* id RoQ (.roq) File muxer
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* Copyright (c) 2007 Vitor Sessak
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avformat.h"
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#include "rawenc.h"
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static int roq_write_header(struct AVFormatContext *s)
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{
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uint8_t header[] = {
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0x84, 0x10, 0xFF, 0xFF, 0xFF, 0xFF, /* fps: */ 0x1E, 0x00
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};
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int n;
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// set the actual fps
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for(n=0;n<s->nb_streams;n++) {
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if (s->streams[n]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
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unsigned int fps;
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if (s->streams[n]->avg_frame_rate.den != 1) {
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av_log(s, AV_LOG_ERROR, "Frame rate must be integer\n");
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return AVERROR(EINVAL);
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}
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if ((fps=s->streams[n]->avg_frame_rate.num) > 255) {
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av_log(s, AV_LOG_ERROR, "Frame rate may not exceed 255fps\n");
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return AVERROR(EINVAL);
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}
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if (fps != 30) {
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av_log(s, AV_LOG_WARNING, "For vintage compatibility fps must be 30\n");
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}
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header[6] = fps;
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break;
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}
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}
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avio_write(s->pb, header, 8);
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return 0;
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}
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AVOutputFormat ff_roq_muxer = {
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.name = "roq",
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.long_name = NULL_IF_CONFIG_SMALL("raw id RoQ"),
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.extensions = "roq",
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.audio_codec = AV_CODEC_ID_ROQ_DPCM,
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.video_codec = AV_CODEC_ID_ROQ,
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.write_header = roq_write_header,
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.write_packet = ff_raw_write_packet,
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};
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