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ee37620b6a
This allows creating a later mp4 fragment without sequentially writing the earlier ones before (when called from a segmenter). Normally when writing a fragmented mp4 file sequentially, the first timestamps of a fragment are adjusted to match the end of the previous fragment, to make sure the timestamp is the same, even if it is calculated as the sum of previous fragment durations. (And for the first packet in a file, the offset of the first packet is written using an edit list.) When writing an individual mp4 fragment discontinuously like this (with potentially writing the earlier fragments separately later), there's a risk of getting a gap in the timeline if the duration field of the last packet in the previous fragment doesn't match up with the start time of the next fragment. Using this requires setting -avoid_negative_ts make_non_negative (or -avoid_negative_ts 0). Signed-off-by: Martin Storsjö <martin@martin.st>
197 lines
5.6 KiB
C
197 lines
5.6 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_FRAG_INFO_ALLOC_INCREMENT 64
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#define MOV_INDEX_CLUSTER_SIZE 1024
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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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#define MODE_ISM 0x40
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#define MODE_F4V 0x80
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typedef struct MOVIentry {
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uint64_t pos;
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int64_t dts;
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unsigned int size;
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unsigned int samples_in_chunk;
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unsigned int entries;
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int cts;
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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 HintSampleQueue {
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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 MOVFragmentInfo {
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int64_t offset;
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int64_t time;
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int64_t duration;
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int64_t tfrf_offset;
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int size;
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} MOVFragmentInfo;
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typedef struct MOVTrack {
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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 track_duration;
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long sample_count;
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long sample_size;
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int has_keyframes;
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#define MOV_TRACK_CTTS 0x0001
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#define MOV_TRACK_STPS 0x0002
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#define MOV_TRACK_ENABLED 0x0004
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uint32_t flags;
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int language;
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int track_id;
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int tag; ///< stsd fourcc
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AVStream *st;
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AVCodecContext *enc;
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int vos_len;
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uint8_t *vos_data;
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MOVIentry *cluster;
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unsigned cluster_capacity;
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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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int64_t start_dts;
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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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int64_t default_duration;
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uint32_t default_sample_flags;
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uint32_t default_size;
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HintSampleQueue sample_queue;
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AVIOContext *mdat_buf;
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int64_t data_offset;
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int64_t frag_start;
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int frag_discont;
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int nb_frag_info;
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MOVFragmentInfo *frag_info;
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unsigned frag_info_capacity;
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struct {
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int64_t struct_offset;
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int first_packet_seq;
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int first_packet_entry;
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int packet_seq;
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int packet_entry;
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int slices;
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} vc1_info;
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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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int iods_skip;
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int iods_video_profile;
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int iods_audio_profile;
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int fragments;
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int max_fragment_duration;
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int min_fragment_duration;
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int max_fragment_size;
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int ism_lookahead;
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AVIOContext *mdat_buf;
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int first_trun;
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int64_t reserved_moov_pos;
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char *major_brand;
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int per_stream_grouping;
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AVFormatContext *fc;
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int use_editlist;
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} MOVMuxContext;
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#define FF_MOV_FLAG_RTP_HINT (1 << 0)
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#define FF_MOV_FLAG_FRAGMENT (1 << 1)
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#define FF_MOV_FLAG_EMPTY_MOOV (1 << 2)
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#define FF_MOV_FLAG_FRAG_KEYFRAME (1 << 3)
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#define FF_MOV_FLAG_SEPARATE_MOOF (1 << 4)
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#define FF_MOV_FLAG_FRAG_CUSTOM (1 << 5)
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#define FF_MOV_FLAG_ISML (1 << 6)
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#define FF_MOV_FLAG_FASTSTART (1 << 7)
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#define FF_MOV_FLAG_OMIT_TFHD_OFFSET (1 << 8)
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#define FF_MOV_FLAG_DISABLE_CHPL (1 << 9)
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#define FF_MOV_FLAG_DEFAULT_BASE_MOOF (1 << 10)
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#define FF_MOV_FLAG_DASH (1 << 11)
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#define FF_MOV_FLAG_FRAG_DISCONT (1 << 12)
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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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