2 * Copyright (c) 2010 Reimar Döffinger
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #include "libavutil/intreadwrite.h"
23 static int ivf_write_header(AVFormatContext *s)
26 ByteIOContext *pb = s->pb;
28 if (s->nb_streams != 1) {
29 av_log(s, AV_LOG_ERROR, "Format supports only exactly one video stream\n");
30 return AVERROR(EINVAL);
32 ctx = s->streams[0]->codec;
33 if (ctx->codec_type != AVMEDIA_TYPE_VIDEO || ctx->codec_id != CODEC_ID_VP8) {
34 av_log(s, AV_LOG_ERROR, "Currently only VP8 is supported!\n");
35 return AVERROR(EINVAL);
37 put_buffer(pb, "DKIF", 4);
38 put_le16(pb, 0); // version
39 put_le16(pb, 32); // header length
40 put_le32(pb, ctx->codec_tag ? ctx->codec_tag : AV_RL32("VP80"));
41 put_le16(pb, ctx->width);
42 put_le16(pb, ctx->height);
43 put_le32(pb, s->streams[0]->time_base.den);
44 put_le32(pb, s->streams[0]->time_base.num);
45 put_le64(pb, s->streams[0]->duration); // TODO: duration or number of frames?!?
50 static int ivf_write_packet(AVFormatContext *s, AVPacket *pkt)
52 ByteIOContext *pb = s->pb;
53 put_le32(pb, pkt->size);
54 put_le64(pb, pkt->pts);
55 put_buffer(pb, pkt->data, pkt->size);
61 AVOutputFormat ff_ivf_muxer = {
63 .long_name = NULL_IF_CONFIG_SMALL("On2 IVF"),
65 .audio_codec = CODEC_ID_NONE,
66 .video_codec = CODEC_ID_VP8,
67 .write_header = ivf_write_header,
68 .write_packet = ivf_write_packet,