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If an annex b bitstream is muxed into mov, the actual written sample is reformatted to mp4 syntax before writing. Currently, the RTP hints that copy data from the normal video track, where the payload data might be offset compared to the original sample that the RTP hinting used (when 3 byte annex b startcodes have been converted into 4 byte mp4 format startcodes). Signed-off-by: Martin Storsjö <martin@martin.st>
128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
/*
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* MOV, 3GP, MP4 muxer
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* Copyright (c) 2003 Thomas Raivio
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* Copyright (c) 2004 Gildas Bazin <gbazin at videolan dot org>
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* Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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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#ifndef AVFORMAT_MOVENC_H
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#define AVFORMAT_MOVENC_H
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#include "avformat.h"
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#define MOV_INDEX_CLUSTER_SIZE 16384
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#define MOV_TIMESCALE 1000
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#define RTP_MAX_PACKET_SIZE 1450
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#define MODE_MP4 0x01
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#define MODE_MOV 0x02
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#define MODE_3GP 0x04
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#define MODE_PSP 0x08 // example working PSP command line:
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// avconv -i testinput.avi -f psp -r 14.985 -s 320x240 -b 768 -ar 24000 -ab 32 M4V00001.MP4
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#define MODE_3G2 0x10
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#define MODE_IPOD 0x20
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typedef struct MOVIentry {
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unsigned int size;
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uint64_t pos;
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unsigned int samplesInChunk;
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unsigned int entries;
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int cts;
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int64_t dts;
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#define MOV_SYNC_SAMPLE 0x0001
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#define MOV_PARTIAL_SYNC_SAMPLE 0x0002
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uint32_t flags;
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} MOVIentry;
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typedef struct HintSample {
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uint8_t *data;
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int size;
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int sample_number;
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int offset;
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int own_data;
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} HintSample;
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typedef struct {
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int size;
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int len;
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HintSample *samples;
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} HintSampleQueue;
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typedef struct MOVIndex {
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int mode;
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int entry;
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unsigned timescale;
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uint64_t time;
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int64_t trackDuration;
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long sampleCount;
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long sampleSize;
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int hasKeyframes;
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#define MOV_TRACK_CTTS 0x0001
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#define MOV_TRACK_STPS 0x0002
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uint32_t flags;
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int language;
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int trackID;
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int tag; ///< stsd fourcc
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AVCodecContext *enc;
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int vosLen;
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uint8_t *vosData;
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MOVIentry *cluster;
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int audio_vbr;
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int height; ///< active picture (w/o VBI) height for D-10/IMX
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uint32_t tref_tag;
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int tref_id; ///< trackID of the referenced track
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int hint_track; ///< the track that hints this track, -1 if no hint track is set
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int src_track; ///< the track that this hint track describes
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AVFormatContext *rtp_ctx; ///< the format context for the hinting rtp muxer
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uint32_t prev_rtp_ts;
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int64_t cur_rtp_ts_unwrapped;
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uint32_t max_packet_size;
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HintSampleQueue sample_queue;
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} MOVTrack;
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typedef struct MOVMuxContext {
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const AVClass *av_class;
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int mode;
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int64_t time;
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int nb_streams;
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int chapter_track; ///< qt chapter track number
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int64_t mdat_pos;
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uint64_t mdat_size;
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MOVTrack *tracks;
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int flags;
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int rtp_flags;
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} MOVMuxContext;
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#define FF_MOV_FLAG_RTP_HINT 1
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int ff_mov_write_packet(AVFormatContext *s, AVPacket *pkt);
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int ff_mov_init_hinting(AVFormatContext *s, int index, int src_index);
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int ff_mov_add_hinted_packet(AVFormatContext *s, AVPacket *pkt,
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int track_index, int sample,
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uint8_t *sample_data, int sample_size);
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void ff_mov_close_hinting(MOVTrack *track);
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#endif /* AVFORMAT_MOVENC_H */
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