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This function converts packet timestamps from the input stream timebase to OutputStream.mux_timebase, which may or may not be equal to the actual output AVStream timebase (and even when it is, this may not always be the optimal choice due to bitstream filtering). Just keep the timestamps in input stream timebase, they will be rescaled as needed before bitstream filtering and/or sending the packet to the muxer. Move the av_rescale_delta() call for audio (needed to preserve accuracy with coarse demuxer timebases) to write_packet. Drop now-unused OutputStream.mux_timebase.
124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
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* Muxer internal APIs - should not be included outside of ffmpeg_mux*
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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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#ifndef FFTOOLS_FFMPEG_MUX_H
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#define FFTOOLS_FFMPEG_MUX_H
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#include <stdatomic.h>
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#include <stdint.h>
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#include "thread_queue.h"
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#include "libavformat/avformat.h"
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#include "libavcodec/packet.h"
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#include "libavutil/dict.h"
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#include "libavutil/fifo.h"
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#include "libavutil/thread.h"
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typedef struct MuxStream {
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OutputStream ost;
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// name used for logging
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char log_name[32];
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/* the packets are buffered here until the muxer is ready to be initialized */
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AVFifo *muxing_queue;
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AVBSFContext *bsf_ctx;
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AVPacket *bsf_pkt;
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AVPacket *pkt;
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EncStats stats;
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int64_t max_frames;
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/*
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* The size of the AVPackets' buffers in queue.
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* Updated when a packet is either pushed or pulled from the queue.
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*/
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size_t muxing_queue_data_size;
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int max_muxing_queue_size;
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/* Threshold after which max_muxing_queue_size will be in effect */
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size_t muxing_queue_data_threshold;
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// timestamp from which the streamcopied streams should start,
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// in AV_TIME_BASE_Q;
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// everything before it should be discarded
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int64_t ts_copy_start;
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/* dts of the last packet sent to the muxer, in the stream timebase
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* used for making up missing dts values */
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int64_t last_mux_dts;
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int64_t stream_duration;
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AVRational stream_duration_tb;
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// state for av_rescale_delta() call for audio in write_packet()
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int64_t ts_rescale_delta_last;
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// combined size of all the packets sent to the muxer
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uint64_t data_size_mux;
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int copy_initial_nonkeyframes;
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int copy_prior_start;
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int streamcopy_started;
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} MuxStream;
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typedef struct Muxer {
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OutputFile of;
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// name used for logging
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char log_name[32];
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AVFormatContext *fc;
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pthread_t thread;
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ThreadQueue *tq;
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AVDictionary *opts;
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int thread_queue_size;
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/* filesize limit expressed in bytes */
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int64_t limit_filesize;
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atomic_int_least64_t last_filesize;
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int header_written;
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SyncQueue *sq_mux;
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AVPacket *sq_pkt;
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} Muxer;
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/* whether we want to print an SDP, set in of_open() */
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extern int want_sdp;
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int mux_check_init(Muxer *mux);
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static MuxStream *ms_from_ost(OutputStream *ost)
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{
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return (MuxStream*)ost;
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}
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#endif /* FFTOOLS_FFMPEG_MUX_H */
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