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avconv.c
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/*
* avconv main
* Copyright (c) 2000-2011 The libav developers.
*
* This file is part of Libav.
*
* Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <limits.h>
#include <unistd.h>
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libavutil/opt.h"
#include "libavcodec/audioconvert.h"
#include "libavutil/audioconvert.h"
#include "libavutil/parseutils.h"
#include "libavutil/samplefmt.h"
#include "libavutil/colorspace.h"
#include "libavutil/fifo.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/dict.h"
#include "libavutil/mathematics.h"
#include "libavutil/pixdesc.h"
#include "libavutil/avstring.h"
#include "libavutil/libm.h"
#include "libavutil/imgutils.h"
#include "libavformat/os_support.h"
#if CONFIG_AVFILTER
# include "libavfilter/avfilter.h"
# include "libavfilter/avfiltergraph.h"
# include "libavfilter/buffersrc.h"
# include "libavfilter/vsrc_buffer.h"
#endif
#if HAVE_SYS_RESOURCE_H
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#elif HAVE_GETPROCESSTIMES
#include <windows.h>
#endif
#if HAVE_GETPROCESSMEMORYINFO
#include <windows.h>
#include <psapi.h>
#endif
#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif
#include <time.h>
#include "cmdutils.h"
#include "libavutil/avassert.h"
#define VSYNC_AUTO -1
#define VSYNC_PASSTHROUGH 0
#define VSYNC_CFR 1
#define VSYNC_VFR 2
const char program_name[] = "avconv";
const int program_birth_year = 2000;
/* select an input stream for an output stream */
typedef struct StreamMap {
int disabled; /** 1 is this mapping is disabled by a negative map */
int file_index;
int stream_index;
int sync_file_index;
int sync_stream_index;
} StreamMap;
/**
* select an input file for an output file
*/
typedef struct MetadataMap {
int file; ///< file index
char type; ///< type of metadata to copy -- (g)lobal, (s)tream, (c)hapter or (p)rogram
int index; ///< stream/chapter/program number
} MetadataMap;
static const OptionDef options[];
static int video_discard = 0;
static int same_quant = 0;
static int do_deinterlace = 0;
static int intra_dc_precision = 8;
static int qp_hist = 0;
static int file_overwrite = 0;
static int do_benchmark = 0;
static int do_hex_dump = 0;
static int do_pkt_dump = 0;
static int do_pass = 0;
static char *pass_logfilename_prefix = NULL;
static int video_sync_method = VSYNC_AUTO;
static int audio_sync_method = 0;
static float audio_drift_threshold = 0.1;
static int copy_ts = 0;
static int copy_tb = 1;
static int opt_shortest = 0;
static char *vstats_filename;
static FILE *vstats_file;
static int audio_volume = 256;
static int exit_on_error = 0;
static int using_stdin = 0;
static int64_t video_size = 0;
static int64_t audio_size = 0;
static int64_t extra_size = 0;
static int nb_frames_dup = 0;
static int nb_frames_drop = 0;
static int input_sync;
static float dts_delta_threshold = 10;
static int print_stats = 1;
static uint8_t *audio_buf;
static unsigned int allocated_audio_buf_size;
static uint8_t *async_buf;
static unsigned int allocated_async_buf_size;
#define DEFAULT_PASS_LOGFILENAME_PREFIX "av2pass"
typedef struct FrameBuffer {
uint8_t *base[4];
uint8_t *data[4];
int linesize[4];
int h, w;
enum PixelFormat pix_fmt;
int refcount;
struct InputStream *ist;
struct FrameBuffer *next;
} FrameBuffer;
typedef struct InputStream {
int file_index;
AVStream *st;
int discard; /* true if stream data should be discarded */
int decoding_needed; /* true if the packets must be decoded in 'raw_fifo' */
AVCodec *dec;
AVFrame *decoded_frame;
AVFrame *filtered_frame;
int64_t start; /* time when read started */
/* predicted dts of the next packet read for this stream or (when there are
* several frames in a packet) of the next frame in current packet */
int64_t next_dts;
/* dts of the last packet read for this stream */
int64_t last_dts;
PtsCorrectionContext pts_ctx;
double ts_scale;
int is_start; /* is 1 at the start and after a discontinuity */
int showed_multi_packet_warning;
AVDictionary *opts;
/* a pool of free buffers for decoded data */
FrameBuffer *buffer_pool;
} InputStream;
typedef struct InputFile {
AVFormatContext *ctx;
int eof_reached; /* true if eof reached */
int ist_index; /* index of first stream in ist_table */
int buffer_size; /* current total buffer size */
int64_t ts_offset;
int nb_streams; /* number of stream that avconv is aware of; may be different
from ctx.nb_streams if new streams appear during av_read_frame() */
int rate_emu;
} InputFile;
typedef struct OutputStream {
int file_index; /* file index */
int index; /* stream index in the output file */
int source_index; /* InputStream index */
AVStream *st; /* stream in the output file */
int encoding_needed; /* true if encoding needed for this stream */
int frame_number;
/* input pts and corresponding output pts
for A/V sync */
// double sync_ipts; /* dts from the AVPacket of the demuxer in second units */
struct InputStream *sync_ist; /* input stream to sync against */
int64_t sync_opts; /* output frame counter, could be changed to some true timestamp */ // FIXME look at frame_number
/* pts of the first frame encoded for this stream, used for limiting
* recording time */
int64_t first_pts;
AVBitStreamFilterContext *bitstream_filters;
AVCodec *enc;
int64_t max_frames;
AVFrame *output_frame;
/* video only */
int video_resample;
AVFrame pict_tmp; /* temporary image for resampling */
struct SwsContext *img_resample_ctx; /* for image resampling */
int resample_height;
int resample_width;
int resample_pix_fmt;
AVRational frame_rate;
int force_fps;
int top_field_first;
float frame_aspect_ratio;
/* forced key frames */
int64_t *forced_kf_pts;
int forced_kf_count;
int forced_kf_index;
/* audio only */
int audio_resample;
ReSampleContext *resample; /* for audio resampling */
int resample_sample_fmt;
int resample_channels;
int resample_sample_rate;
int reformat_pair;
AVAudioConvert *reformat_ctx;
AVFifoBuffer *fifo; /* for compression: one audio fifo per codec */
FILE *logfile;
#if CONFIG_AVFILTER
AVFilterContext *output_video_filter;
AVFilterContext *input_video_filter;
AVFilterBufferRef *picref;
char *avfilter;
AVFilterGraph *graph;
#endif
int64_t sws_flags;
AVDictionary *opts;
int is_past_recording_time;
int stream_copy;
const char *attachment_filename;
int copy_initial_nonkeyframes;
} OutputStream;
typedef struct OutputFile {
AVFormatContext *ctx;
AVDictionary *opts;
int ost_index; /* index of the first stream in output_streams */
int64_t recording_time; /* desired length of the resulting file in microseconds */
int64_t start_time; /* start time in microseconds */
uint64_t limit_filesize;
} OutputFile;
static InputStream *input_streams = NULL;
static int nb_input_streams = 0;
static InputFile *input_files = NULL;
static int nb_input_files = 0;
static OutputStream *output_streams = NULL;
static int nb_output_streams = 0;
static OutputFile *output_files = NULL;
static int nb_output_files = 0;
typedef struct OptionsContext {
/* input/output options */
int64_t start_time;
const char *format;
SpecifierOpt *codec_names;
int nb_codec_names;
SpecifierOpt *audio_channels;
int nb_audio_channels;
SpecifierOpt *audio_sample_rate;
int nb_audio_sample_rate;
SpecifierOpt *frame_rates;
int nb_frame_rates;
SpecifierOpt *frame_sizes;
int nb_frame_sizes;
SpecifierOpt *frame_pix_fmts;
int nb_frame_pix_fmts;
/* input options */
int64_t input_ts_offset;
int rate_emu;
SpecifierOpt *ts_scale;
int nb_ts_scale;
SpecifierOpt *dump_attachment;
int nb_dump_attachment;
/* output options */
StreamMap *stream_maps;
int nb_stream_maps;
/* first item specifies output metadata, second is input */
MetadataMap (*meta_data_maps)[2];
int nb_meta_data_maps;
int metadata_global_manual;
int metadata_streams_manual;
int metadata_chapters_manual;
const char **attachments;
int nb_attachments;
int chapters_input_file;
int64_t recording_time;
uint64_t limit_filesize;
float mux_preload;
float mux_max_delay;
int video_disable;
int audio_disable;
int subtitle_disable;
int data_disable;
/* indexed by output file stream index */
int *streamid_map;
int nb_streamid_map;
SpecifierOpt *metadata;
int nb_metadata;
SpecifierOpt *max_frames;
int nb_max_frames;
SpecifierOpt *bitstream_filters;
int nb_bitstream_filters;
SpecifierOpt *codec_tags;
int nb_codec_tags;
SpecifierOpt *sample_fmts;
int nb_sample_fmts;
SpecifierOpt *qscale;
int nb_qscale;
SpecifierOpt *forced_key_frames;
int nb_forced_key_frames;
SpecifierOpt *force_fps;
int nb_force_fps;
SpecifierOpt *frame_aspect_ratios;
int nb_frame_aspect_ratios;
SpecifierOpt *rc_overrides;
int nb_rc_overrides;
SpecifierOpt *intra_matrices;
int nb_intra_matrices;
SpecifierOpt *inter_matrices;
int nb_inter_matrices;
SpecifierOpt *top_field_first;
int nb_top_field_first;
SpecifierOpt *metadata_map;
int nb_metadata_map;
SpecifierOpt *presets;
int nb_presets;
SpecifierOpt *copy_initial_nonkeyframes;
int nb_copy_initial_nonkeyframes;
#if CONFIG_AVFILTER
SpecifierOpt *filters;
int nb_filters;
#endif
} OptionsContext;
#define MATCH_PER_STREAM_OPT(name, type, outvar, fmtctx, st)\
{\
int i, ret;\
for (i = 0; i < o->nb_ ## name; i++) {\
char *spec = o->name[i].specifier;\
if ((ret = check_stream_specifier(fmtctx, st, spec)) > 0)\
outvar = o->name[i].u.type;\
else if (ret < 0)\
exit_program(1);\
}\
}
static void reset_options(OptionsContext *o)
{
const OptionDef *po = options;
/* all OPT_SPEC and OPT_STRING can be freed in generic way */
while (po->name) {
void *dst = (uint8_t*)o + po->u.off;
if (po->flags & OPT_SPEC) {
SpecifierOpt **so = dst;
int i, *count = (int*)(so + 1);
for (i = 0; i < *count; i++) {
av_freep(&(*so)[i].specifier);
if (po->flags & OPT_STRING)
av_freep(&(*so)[i].u.str);
}
av_freep(so);
*count = 0;
} else if (po->flags & OPT_OFFSET && po->flags & OPT_STRING)
av_freep(dst);
po++;
}
av_freep(&o->stream_maps);
av_freep(&o->meta_data_maps);
av_freep(&o->streamid_map);
memset(o, 0, sizeof(*o));
o->mux_max_delay = 0.7;
o->recording_time = INT64_MAX;
o->limit_filesize = UINT64_MAX;
o->chapters_input_file = INT_MAX;
uninit_opts();
init_opts();
}
static int alloc_buffer(InputStream *ist, AVCodecContext *s, FrameBuffer **pbuf)
{
FrameBuffer *buf = av_mallocz(sizeof(*buf));
int i, ret;
const int pixel_size = av_pix_fmt_descriptors[s->pix_fmt].comp[0].step_minus1+1;
int h_chroma_shift, v_chroma_shift;
int edge = 32; // XXX should be avcodec_get_edge_width(), but that fails on svq1
int w = s->width, h = s->height;
if (!buf)
return AVERROR(ENOMEM);
if (!(s->flags & CODEC_FLAG_EMU_EDGE)) {
w += 2*edge;
h += 2*edge;
}
avcodec_align_dimensions(s, &w, &h);
if ((ret = av_image_alloc(buf->base, buf->linesize, w, h,
s->pix_fmt, 32)) < 0) {
av_freep(&buf);
return ret;
}
/* XXX this shouldn't be needed, but some tests break without this line
* those decoders are buggy and need to be fixed.
* the following tests fail:
* cdgraphics, ansi, aasc, fraps-v1, qtrle-1bit
*/
memset(buf->base[0], 128, ret);
avcodec_get_chroma_sub_sample(s->pix_fmt, &h_chroma_shift, &v_chroma_shift);
for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
const int h_shift = i==0 ? 0 : h_chroma_shift;
const int v_shift = i==0 ? 0 : v_chroma_shift;
if (s->flags & CODEC_FLAG_EMU_EDGE)
buf->data[i] = buf->base[i];
else
buf->data[i] = buf->base[i] +
FFALIGN((buf->linesize[i]*edge >> v_shift) +
(pixel_size*edge >> h_shift), 32);
}
buf->w = s->width;
buf->h = s->height;
buf->pix_fmt = s->pix_fmt;
buf->ist = ist;
*pbuf = buf;
return 0;
}
static void free_buffer_pool(InputStream *ist)
{
FrameBuffer *buf = ist->buffer_pool;
while (buf) {
ist->buffer_pool = buf->next;
av_freep(&buf->base[0]);
av_free(buf);
buf = ist->buffer_pool;
}
}
static void unref_buffer(InputStream *ist, FrameBuffer *buf)
{
av_assert0(buf->refcount);
buf->refcount--;
if (!buf->refcount) {
buf->next = ist->buffer_pool;
ist->buffer_pool = buf;
}
}
static int codec_get_buffer(AVCodecContext *s, AVFrame *frame)
{
InputStream *ist = s->opaque;
FrameBuffer *buf;
int ret, i;
if (!ist->buffer_pool && (ret = alloc_buffer(ist, s, &ist->buffer_pool)) < 0)
return ret;
buf = ist->buffer_pool;
ist->buffer_pool = buf->next;
buf->next = NULL;
if (buf->w != s->width || buf->h != s->height || buf->pix_fmt != s->pix_fmt) {
av_freep(&buf->base[0]);
av_free(buf);
if ((ret = alloc_buffer(ist, s, &buf)) < 0)
return ret;
}
buf->refcount++;
frame->opaque = buf;
frame->type = FF_BUFFER_TYPE_USER;
frame->extended_data = frame->data;
frame->pkt_pts = s->pkt ? s->pkt->pts : AV_NOPTS_VALUE;
frame->width = buf->w;
frame->height = buf->h;
frame->format = buf->pix_fmt;
frame->sample_aspect_ratio = s->sample_aspect_ratio;
for (i = 0; i < FF_ARRAY_ELEMS(buf->data); i++) {
frame->base[i] = buf->base[i]; // XXX h264.c uses base though it shouldn't
frame->data[i] = buf->data[i];
frame->linesize[i] = buf->linesize[i];
}
return 0;
}
static void codec_release_buffer(AVCodecContext *s, AVFrame *frame)
{
InputStream *ist = s->opaque;
FrameBuffer *buf = frame->opaque;
int i;
for (i = 0; i < FF_ARRAY_ELEMS(frame->data); i++)
frame->data[i] = NULL;
unref_buffer(ist, buf);
}
static void filter_release_buffer(AVFilterBuffer *fb)
{
FrameBuffer *buf = fb->priv;
av_free(fb);
unref_buffer(buf->ist, buf);
}
#if CONFIG_AVFILTER
static int configure_video_filters(InputStream *ist, OutputStream *ost)
{
AVFilterContext *last_filter, *filter;
/** filter graph containing all filters including input & output */
AVCodecContext *codec = ost->st->codec;
AVCodecContext *icodec = ist->st->codec;
SinkContext sink_ctx = { .pix_fmt = codec->pix_fmt };
AVRational sample_aspect_ratio;
char args[255];
int ret;
ost->graph = avfilter_graph_alloc();
if (ist->st->sample_aspect_ratio.num) {
sample_aspect_ratio = ist->st->sample_aspect_ratio;
} else
sample_aspect_ratio = ist->st->codec->sample_aspect_ratio;
snprintf(args, 255, "%d:%d:%d:%d:%d:%d:%d", ist->st->codec->width,
ist->st->codec->height, ist->st->codec->pix_fmt, 1, AV_TIME_BASE,
sample_aspect_ratio.num, sample_aspect_ratio.den);
ret = avfilter_graph_create_filter(&ost->input_video_filter, avfilter_get_by_name("buffer"),
"src", args, NULL, ost->graph);
if (ret < 0)
return ret;
ret = avfilter_graph_create_filter(&ost->output_video_filter, &sink,
"out", NULL, &sink_ctx, ost->graph);
if (ret < 0)
return ret;
last_filter = ost->input_video_filter;
if (codec->width != icodec->width || codec->height != icodec->height) {
snprintf(args, 255, "%d:%d:flags=0x%X",
codec->width,
codec->height,
(unsigned)ost->sws_flags);
if ((ret = avfilter_graph_create_filter(&filter, avfilter_get_by_name("scale"),
NULL, args, NULL, ost->graph)) < 0)
return ret;
if ((ret = avfilter_link(last_filter, 0, filter, 0)) < 0)
return ret;
last_filter = filter;
}
snprintf(args, sizeof(args), "flags=0x%X", (unsigned)ost->sws_flags);
ost->graph->scale_sws_opts = av_strdup(args);
if (ost->avfilter) {
AVFilterInOut *outputs = av_malloc(sizeof(AVFilterInOut));
AVFilterInOut *inputs = av_malloc(sizeof(AVFilterInOut));
outputs->name = av_strdup("in");
outputs->filter_ctx = last_filter;
outputs->pad_idx = 0;
outputs->next = NULL;
inputs->name = av_strdup("out");
inputs->filter_ctx = ost->output_video_filter;
inputs->pad_idx = 0;
inputs->next = NULL;
if ((ret = avfilter_graph_parse(ost->graph, ost->avfilter, inputs, outputs, NULL)) < 0)
return ret;
} else {
if ((ret = avfilter_link(last_filter, 0, ost->output_video_filter, 0)) < 0)
return ret;
}
if ((ret = avfilter_graph_config(ost->graph, NULL)) < 0)
return ret;
codec->width = ost->output_video_filter->inputs[0]->w;
codec->height = ost->output_video_filter->inputs[0]->h;
codec->sample_aspect_ratio = ost->st->sample_aspect_ratio =
ost->frame_aspect_ratio ? // overridden by the -aspect cli option
av_d2q(ost->frame_aspect_ratio * codec->height/codec->width, 255) :
ost->output_video_filter->inputs[0]->sample_aspect_ratio;
return 0;
}
#endif /* CONFIG_AVFILTER */
static void term_exit(void)
{
av_log(NULL, AV_LOG_QUIET, "");
}
static volatile int received_sigterm = 0;
static volatile int received_nb_signals = 0;
static void
sigterm_handler(int sig)
{
received_sigterm = sig;
received_nb_signals++;
term_exit();
}
static void term_init(void)
{
signal(SIGINT , sigterm_handler); /* Interrupt (ANSI). */
signal(SIGTERM, sigterm_handler); /* Termination (ANSI). */
#ifdef SIGXCPU
signal(SIGXCPU, sigterm_handler);
#endif
}
static int decode_interrupt_cb(void *ctx)
{
return received_nb_signals > 1;
}
static const AVIOInterruptCB int_cb = { decode_interrupt_cb, NULL };
void exit_program(int ret)
{
int i;
/* close files */
for (i = 0; i < nb_output_files; i++) {
AVFormatContext *s = output_files[i].ctx;
if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
avio_close(s->pb);
avformat_free_context(s);
av_dict_free(&output_files[i].opts);
}
for (i = 0; i < nb_output_streams; i++) {
AVBitStreamFilterContext *bsfc = output_streams[i].bitstream_filters;
while (bsfc) {
AVBitStreamFilterContext *next = bsfc->next;
av_bitstream_filter_close(bsfc);
bsfc = next;
}
output_streams[i].bitstream_filters = NULL;
if (output_streams[i].output_frame) {
AVFrame *frame = output_streams[i].output_frame;
if (frame->extended_data != frame->data)
av_freep(&frame->extended_data);
av_freep(&frame);
}
#if CONFIG_AVFILTER
av_freep(&output_streams[i].avfilter);
#endif
}
for (i = 0; i < nb_input_files; i++) {
avformat_close_input(&input_files[i].ctx);
}
for (i = 0; i < nb_input_streams; i++) {
av_freep(&input_streams[i].decoded_frame);
av_freep(&input_streams[i].filtered_frame);
av_dict_free(&input_streams[i].opts);
free_buffer_pool(&input_streams[i]);
}
if (vstats_file)
fclose(vstats_file);
av_free(vstats_filename);
av_freep(&input_streams);
av_freep(&input_files);
av_freep(&output_streams);
av_freep(&output_files);
uninit_opts();
av_free(audio_buf);
allocated_audio_buf_size = 0;
av_free(async_buf);
allocated_async_buf_size = 0;
#if CONFIG_AVFILTER
avfilter_uninit();
#endif
avformat_network_deinit();
if (received_sigterm) {
av_log(NULL, AV_LOG_INFO, "Received signal %d: terminating.\n",
(int) received_sigterm);
exit (255);
}
exit(ret);
}
static void assert_avoptions(AVDictionary *m)
{
AVDictionaryEntry *t;
if ((t = av_dict_get(m, "", NULL, AV_DICT_IGNORE_SUFFIX))) {
av_log(NULL, AV_LOG_FATAL, "Option %s not found.\n", t->key);
exit_program(1);
}
}
static void assert_codec_experimental(AVCodecContext *c, int encoder)
{
const char *codec_string = encoder ? "encoder" : "decoder";
AVCodec *codec;
if (c->codec->capabilities & CODEC_CAP_EXPERIMENTAL &&
c->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
av_log(NULL, AV_LOG_FATAL, "%s '%s' is experimental and might produce bad "
"results.\nAdd '-strict experimental' if you want to use it.\n",
codec_string, c->codec->name);
codec = encoder ? avcodec_find_encoder(c->codec->id) : avcodec_find_decoder(c->codec->id);
if (!(codec->capabilities & CODEC_CAP_EXPERIMENTAL))
av_log(NULL, AV_LOG_FATAL, "Or use the non experimental %s '%s'.\n",
codec_string, codec->name);
exit_program(1);
}
}
static void choose_sample_fmt(AVStream *st, AVCodec *codec)
{
if (codec && codec->sample_fmts) {
const enum AVSampleFormat *p = codec->sample_fmts;
for (; *p != -1; p++) {
if (*p == st->codec->sample_fmt)
break;
}
if (*p == -1) {
av_log(NULL, AV_LOG_WARNING,
"Incompatible sample format '%s' for codec '%s', auto-selecting format '%s'\n",
av_get_sample_fmt_name(st->codec->sample_fmt),
codec->name,
av_get_sample_fmt_name(codec->sample_fmts[0]));
st->codec->sample_fmt = codec->sample_fmts[0];
}
}
}
/**
* Update the requested input sample format based on the output sample format.
* This is currently only used to request float output from decoders which
* support multiple sample formats, one of which is AV_SAMPLE_FMT_FLT.
* Ideally this will be removed in the future when decoders do not do format
* conversion and only output in their native format.
*/
static void update_sample_fmt(AVCodecContext *dec, AVCodec *dec_codec,
AVCodecContext *enc)
{
/* if sample formats match or a decoder sample format has already been
requested, just return */
if (enc->sample_fmt == dec->sample_fmt ||
dec->request_sample_fmt > AV_SAMPLE_FMT_NONE)
return;
/* if decoder supports more than one output format */
if (dec_codec && dec_codec->sample_fmts &&
dec_codec->sample_fmts[0] != AV_SAMPLE_FMT_NONE &&
dec_codec->sample_fmts[1] != AV_SAMPLE_FMT_NONE) {
const enum AVSampleFormat *p;
int min_dec = -1, min_inc = -1;
/* find a matching sample format in the encoder */
for (p = dec_codec->sample_fmts; *p != AV_SAMPLE_FMT_NONE; p++) {
if (*p == enc->sample_fmt) {
dec->request_sample_fmt = *p;
return;
} else if (*p > enc->sample_fmt) {
min_inc = FFMIN(min_inc, *p - enc->sample_fmt);
} else
min_dec = FFMIN(min_dec, enc->sample_fmt - *p);
}
/* if none match, provide the one that matches quality closest */
dec->request_sample_fmt = min_inc > 0 ? enc->sample_fmt + min_inc :
enc->sample_fmt - min_dec;
}
}
static void choose_sample_rate(AVStream *st, AVCodec *codec)
{
if (codec && codec->supported_samplerates) {
const int *p = codec->supported_samplerates;
int best = 0;
int best_dist = INT_MAX;
for (; *p; p++) {
int dist = abs(st->codec->sample_rate - *p);
if (dist < best_dist) {
best_dist = dist;
best = *p;
}
}
if (best_dist) {
av_log(st->codec, AV_LOG_WARNING, "Requested sampling rate unsupported using closest supported (%d)\n", best);
}
st->codec->sample_rate = best;
}
}
static void choose_pixel_fmt(AVStream *st, AVCodec *codec)
{
if (codec && codec->pix_fmts) {
const enum PixelFormat *p = codec->pix_fmts;
if (st->codec->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
if (st->codec->codec_id == CODEC_ID_MJPEG) {
p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUV420P, PIX_FMT_YUV422P, PIX_FMT_NONE };
} else if (st->codec->codec_id == CODEC_ID_LJPEG) {
p = (const enum PixelFormat[]) { PIX_FMT_YUVJ420P, PIX_FMT_YUVJ422P, PIX_FMT_YUVJ444P, PIX_FMT_YUV420P,
PIX_FMT_YUV422P, PIX_FMT_YUV444P, PIX_FMT_BGRA, PIX_FMT_NONE };
}
}
for (; *p != PIX_FMT_NONE; p++) {
if (*p == st->codec->pix_fmt)
break;
}
if (*p == PIX_FMT_NONE) {
if (st->codec->pix_fmt != PIX_FMT_NONE)
av_log(NULL, AV_LOG_WARNING,
"Incompatible pixel format '%s' for codec '%s', auto-selecting format '%s'\n",
av_pix_fmt_descriptors[st->codec->pix_fmt].name,
codec->name,
av_pix_fmt_descriptors[codec->pix_fmts[0]].name);
st->codec->pix_fmt = codec->pix_fmts[0];
}
}
}
static double
get_sync_ipts(const OutputStream *ost, int64_t pts)
{
OutputFile *of = &output_files[ost->file_index];
return (double)(pts - of->start_time) / AV_TIME_BASE;
}
static void write_frame(AVFormatContext *s, AVPacket *pkt, OutputStream *ost)
{
AVBitStreamFilterContext *bsfc = ost->bitstream_filters;
AVCodecContext *avctx = ost->st->codec;
int ret;
/*
* Audio encoders may split the packets -- #frames in != #packets out.
* But there is no reordering, so we can limit the number of output packets
* by simply dropping them here.
* Counting encoded video frames needs to be done separately because of
* reordering, see do_video_out()
*/
if (!(avctx->codec_type == AVMEDIA_TYPE_VIDEO && avctx->codec)) {
if (ost->frame_number >= ost->max_frames) {
av_free_packet(pkt);
return;
}
ost->frame_number++;
}
while (bsfc) {
AVPacket new_pkt = *pkt;
int a = av_bitstream_filter_filter(bsfc, avctx, NULL,
&new_pkt.data, &new_pkt.size,
pkt->data, pkt->size,
pkt->flags & AV_PKT_FLAG_KEY);
if (a > 0) {
av_free_packet(pkt);
new_pkt.destruct = av_destruct_packet;
} else if (a < 0) {
av_log(NULL, AV_LOG_ERROR, "%s failed for stream %d, codec %s",
bsfc->filter->name, pkt->stream_index,
avctx->codec ? avctx->codec->name : "copy");
print_error("", a);
if (exit_on_error)
exit_program(1);
}
*pkt = new_pkt;
bsfc = bsfc->next;
}
pkt->stream_index = ost->index;
ret = av_interleaved_write_frame(s, pkt);
if (ret < 0) {
print_error("av_interleaved_write_frame()", ret);
exit_program(1);
}
}
static int check_recording_time(OutputStream *ost)
{
OutputFile *of = &output_files[ost->file_index];
if (of->recording_time != INT64_MAX &&
av_compare_ts(ost->sync_opts - ost->first_pts, ost->st->codec->time_base, of->recording_time,
AV_TIME_BASE_Q) >= 0) {
ost->is_past_recording_time = 1;
return 0;
}
return 1;
}
static void generate_silence(uint8_t* buf, enum AVSampleFormat sample_fmt, size_t size)
{
int fill_char = 0x00;
if (sample_fmt == AV_SAMPLE_FMT_U8)
fill_char = 0x80;
memset(buf, fill_char, size);
}
static int encode_audio_frame(AVFormatContext *s, OutputStream *ost,
const uint8_t *buf, int buf_size)
{
AVCodecContext *enc = ost->st->codec;
AVFrame *frame = NULL;
AVPacket pkt;
int ret, got_packet;
av_init_packet(&pkt);
pkt.data = NULL;
pkt.size = 0;
if (buf) {
if (!ost->output_frame) {
ost->output_frame = avcodec_alloc_frame();
if (!ost->output_frame) {
av_log(NULL, AV_LOG_FATAL, "out-of-memory in encode_audio_frame()\n");
exit_program(1);
}
}
frame = ost->output_frame;
if (frame->extended_data != frame->data)
av_freep(&frame->extended_data);
avcodec_get_frame_defaults(frame);
frame->nb_samples = buf_size /
(enc->channels * av_get_bytes_per_sample(enc->sample_fmt));
if ((ret = avcodec_fill_audio_frame(frame, enc->channels, enc->sample_fmt,
buf, buf_size, 1)) < 0) {
av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
exit_program(1);
}
if (!check_recording_time(ost))
return 0;
frame->pts = ost->sync_opts;
ost->sync_opts += frame->nb_samples;
}
got_packet = 0;
if (avcodec_encode_audio2(enc, &pkt, frame, &got_packet) < 0) {
av_log(NULL, AV_LOG_FATAL, "Audio encoding failed\n");
exit_program(1);
}