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ffmpeg_opt.c
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ffmpeg_opt.c
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/*
* ffmpeg option parsing
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <stdint.h>
#if HAVE_SYS_RESOURCE_H
#include <sys/time.h>
#include <sys/resource.h>
#endif
#include "ffmpeg.h"
#include "cmdutils.h"
#include "opt_common.h"
#include "sync_queue.h"
#include "libavformat/avformat.h"
#include "libavcodec/avcodec.h"
#include "libavcodec/bsf.h"
#include "libavfilter/avfilter.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/avutil.h"
#include "libavutil/bprint.h"
#include "libavutil/channel_layout.h"
#include "libavutil/display.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/fifo.h"
#include "libavutil/mathematics.h"
#include "libavutil/opt.h"
#include "libavutil/parseutils.h"
#include "libavutil/pixdesc.h"
#include "libavutil/pixfmt.h"
const char *const opt_name_codec_names[] = {"c", "codec", "acodec", "vcodec", "scodec", "dcodec", NULL};
const char *const opt_name_frame_rates[] = {"r", NULL};
const char *const opt_name_codec_tags[] = {"tag", "atag", "vtag", "stag", NULL};
const char *const opt_name_top_field_first[] = {"top", NULL};
HWDevice *filter_hw_device;
char *vstats_filename;
char *sdp_filename;
float audio_drift_threshold = 0.1;
float dts_delta_threshold = 10;
float dts_error_threshold = 3600*30;
enum VideoSyncMethod video_sync_method = VSYNC_AUTO;
float frame_drop_threshold = 0;
int do_benchmark = 0;
int do_benchmark_all = 0;
int do_hex_dump = 0;
int do_pkt_dump = 0;
int copy_ts = 0;
int start_at_zero = 0;
int copy_tb = -1;
int debug_ts = 0;
int exit_on_error = 0;
int abort_on_flags = 0;
int print_stats = -1;
int stdin_interaction = 1;
float max_error_rate = 2.0/3;
char *filter_nbthreads;
int filter_complex_nbthreads = 0;
int vstats_version = 2;
int auto_conversion_filters = 1;
int64_t stats_period = 500000;
static int file_overwrite = 0;
static int no_file_overwrite = 0;
#if FFMPEG_OPT_PSNR
int do_psnr = 0;
#endif
int ignore_unknown_streams = 0;
int copy_unknown_streams = 0;
int recast_media = 0;
static void uninit_options(OptionsContext *o)
{
const OptionDef *po = options;
int i;
/* 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++;
}
for (i = 0; i < o->nb_stream_maps; i++)
av_freep(&o->stream_maps[i].linklabel);
av_freep(&o->stream_maps);
#if FFMPEG_OPT_MAP_CHANNEL
av_freep(&o->audio_channel_maps);
#endif
av_freep(&o->streamid_map);
av_freep(&o->attachments);
}
static void init_options(OptionsContext *o)
{
memset(o, 0, sizeof(*o));
o->stop_time = INT64_MAX;
o->mux_max_delay = 0.7;
o->start_time = AV_NOPTS_VALUE;
o->start_time_eof = AV_NOPTS_VALUE;
o->recording_time = INT64_MAX;
o->limit_filesize = INT64_MAX;
o->chapters_input_file = INT_MAX;
o->accurate_seek = 1;
o->thread_queue_size = -1;
o->input_sync_ref = -1;
o->find_stream_info = 1;
o->shortest_buf_duration = 10.f;
}
static int show_hwaccels(void *optctx, const char *opt, const char *arg)
{
enum AVHWDeviceType type = AV_HWDEVICE_TYPE_NONE;
printf("Hardware acceleration methods:\n");
while ((type = av_hwdevice_iterate_types(type)) !=
AV_HWDEVICE_TYPE_NONE)
printf("%s\n", av_hwdevice_get_type_name(type));
printf("\n");
return 0;
}
/* return a copy of the input with the stream specifiers removed from the keys */
AVDictionary *strip_specifiers(const AVDictionary *dict)
{
const AVDictionaryEntry *e = NULL;
AVDictionary *ret = NULL;
while ((e = av_dict_iterate(dict, e))) {
char *p = strchr(e->key, ':');
if (p)
*p = 0;
av_dict_set(&ret, e->key, e->value, 0);
if (p)
*p = ':';
}
return ret;
}
int parse_and_set_vsync(const char *arg, int *vsync_var, int file_idx, int st_idx, int is_global)
{
if (!av_strcasecmp(arg, "cfr")) *vsync_var = VSYNC_CFR;
else if (!av_strcasecmp(arg, "vfr")) *vsync_var = VSYNC_VFR;
else if (!av_strcasecmp(arg, "passthrough")) *vsync_var = VSYNC_PASSTHROUGH;
else if (!av_strcasecmp(arg, "drop")) *vsync_var = VSYNC_DROP;
else if (!is_global && !av_strcasecmp(arg, "auto")) *vsync_var = VSYNC_AUTO;
else if (!is_global) {
av_log(NULL, AV_LOG_FATAL, "Invalid value %s specified for fps_mode of #%d:%d.\n", arg, file_idx, st_idx);
exit_program(1);
}
if (is_global && *vsync_var == VSYNC_AUTO) {
video_sync_method = parse_number_or_die("vsync", arg, OPT_INT, VSYNC_AUTO, VSYNC_VFR);
av_log(NULL, AV_LOG_WARNING, "Passing a number to -vsync is deprecated,"
" use a string argument as described in the manual.\n");
}
return 0;
}
/* Correct input file start times based on enabled streams */
static void correct_input_start_times(void)
{
for (int i = 0; i < nb_input_files; i++) {
InputFile *ifile = input_files[i];
AVFormatContext *is = ifile->ctx;
int64_t new_start_time = INT64_MAX, diff, abs_start_seek;
ifile->start_time_effective = is->start_time;
if (is->start_time == AV_NOPTS_VALUE ||
!(is->iformat->flags & AVFMT_TS_DISCONT))
continue;
for (int j = 0; j < is->nb_streams; j++) {
AVStream *st = is->streams[j];
if(st->discard == AVDISCARD_ALL || st->start_time == AV_NOPTS_VALUE)
continue;
new_start_time = FFMIN(new_start_time, av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q));
}
diff = new_start_time - is->start_time;
if (diff) {
av_log(NULL, AV_LOG_VERBOSE, "Correcting start time of Input #%d by %"PRId64" us.\n", i, diff);
ifile->start_time_effective = new_start_time;
if (copy_ts && start_at_zero)
ifile->ts_offset = -new_start_time;
else if (!copy_ts) {
abs_start_seek = is->start_time + (ifile->start_time != AV_NOPTS_VALUE) ? ifile->start_time : 0;
ifile->ts_offset = abs_start_seek > new_start_time ? -abs_start_seek : -new_start_time;
} else if (copy_ts)
ifile->ts_offset = 0;
ifile->ts_offset += ifile->input_ts_offset;
}
}
}
static int apply_sync_offsets(void)
{
for (int i = 0; i < nb_input_files; i++) {
InputFile *ref, *self = input_files[i];
int64_t adjustment;
int64_t self_start_time, ref_start_time, self_seek_start, ref_seek_start;
int start_times_set = 1;
if (self->input_sync_ref == -1 || self->input_sync_ref == i) continue;
if (self->input_sync_ref >= nb_input_files || self->input_sync_ref < -1) {
av_log(NULL, AV_LOG_FATAL, "-isync for input %d references non-existent input %d.\n", i, self->input_sync_ref);
exit_program(1);
}
if (copy_ts && !start_at_zero) {
av_log(NULL, AV_LOG_FATAL, "Use of -isync requires that start_at_zero be set if copyts is set.\n");
exit_program(1);
}
ref = input_files[self->input_sync_ref];
if (ref->input_sync_ref != -1 && ref->input_sync_ref != self->input_sync_ref) {
av_log(NULL, AV_LOG_ERROR, "-isync for input %d references a resynced input %d. Sync not set.\n", i, self->input_sync_ref);
continue;
}
if (self->ctx->start_time_realtime != AV_NOPTS_VALUE && ref->ctx->start_time_realtime != AV_NOPTS_VALUE) {
self_start_time = self->ctx->start_time_realtime;
ref_start_time = ref->ctx->start_time_realtime;
} else if (self->start_time_effective != AV_NOPTS_VALUE && ref->start_time_effective != AV_NOPTS_VALUE) {
self_start_time = self->start_time_effective;
ref_start_time = ref->start_time_effective;
} else {
start_times_set = 0;
}
if (start_times_set) {
self_seek_start = self->start_time == AV_NOPTS_VALUE ? 0 : self->start_time;
ref_seek_start = ref->start_time == AV_NOPTS_VALUE ? 0 : ref->start_time;
adjustment = (self_start_time - ref_start_time) + !copy_ts*(self_seek_start - ref_seek_start) + ref->input_ts_offset;
self->ts_offset += adjustment;
av_log(NULL, AV_LOG_INFO, "Adjusted ts offset for Input #%d by %"PRId64" us to sync with Input #%d.\n", i, adjustment, self->input_sync_ref);
} else {
av_log(NULL, AV_LOG_INFO, "Unable to identify start times for Inputs #%d and %d both. No sync adjustment made.\n", i, self->input_sync_ref);
}
}
return 0;
}
static int opt_filter_threads(void *optctx, const char *opt, const char *arg)
{
av_free(filter_nbthreads);
filter_nbthreads = av_strdup(arg);
return 0;
}
static int opt_abort_on(void *optctx, const char *opt, const char *arg)
{
static const AVOption opts[] = {
{ "abort_on" , NULL, 0, AV_OPT_TYPE_FLAGS, { .i64 = 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
{ "empty_output" , NULL, 0, AV_OPT_TYPE_CONST, { .i64 = ABORT_ON_FLAG_EMPTY_OUTPUT }, .unit = "flags" },
{ "empty_output_stream", NULL, 0, AV_OPT_TYPE_CONST, { .i64 = ABORT_ON_FLAG_EMPTY_OUTPUT_STREAM }, .unit = "flags" },
{ NULL },
};
static const AVClass class = {
.class_name = "",
.item_name = av_default_item_name,
.option = opts,
.version = LIBAVUTIL_VERSION_INT,
};
const AVClass *pclass = &class;
return av_opt_eval_flags(&pclass, &opts[0], arg, &abort_on_flags);
}
static int opt_stats_period(void *optctx, const char *opt, const char *arg)
{
int64_t user_stats_period = parse_time_or_die(opt, arg, 1);
if (user_stats_period <= 0) {
av_log(NULL, AV_LOG_ERROR, "stats_period %s must be positive.\n", arg);
return AVERROR(EINVAL);
}
stats_period = user_stats_period;
av_log(NULL, AV_LOG_INFO, "ffmpeg stats and -progress period set to %s.\n", arg);
return 0;
}
static int opt_audio_codec(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
return parse_option(o, "codec:a", arg, options);
}
static int opt_video_codec(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
return parse_option(o, "codec:v", arg, options);
}
static int opt_subtitle_codec(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
return parse_option(o, "codec:s", arg, options);
}
static int opt_data_codec(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
return parse_option(o, "codec:d", arg, options);
}
static int opt_map(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
StreamMap *m = NULL;
int i, negative = 0, file_idx, disabled = 0;
#if FFMPEG_OPT_MAP_SYNC
char *sync;
#endif
char *map, *p;
char *allow_unused;
if (*arg == '-') {
negative = 1;
arg++;
}
map = av_strdup(arg);
if (!map)
return AVERROR(ENOMEM);
#if FFMPEG_OPT_MAP_SYNC
/* parse sync stream first, just pick first matching stream */
if (sync = strchr(map, ',')) {
*sync = 0;
av_log(NULL, AV_LOG_WARNING, "Specifying a sync stream is deprecated and has no effect\n");
}
#endif
if (map[0] == '[') {
/* this mapping refers to lavfi output */
const char *c = map + 1;
GROW_ARRAY(o->stream_maps, o->nb_stream_maps);
m = &o->stream_maps[o->nb_stream_maps - 1];
m->linklabel = av_get_token(&c, "]");
if (!m->linklabel) {
av_log(NULL, AV_LOG_ERROR, "Invalid output link label: %s.\n", map);
exit_program(1);
}
} else {
if (allow_unused = strchr(map, '?'))
*allow_unused = 0;
file_idx = strtol(map, &p, 0);
if (file_idx >= nb_input_files || file_idx < 0) {
av_log(NULL, AV_LOG_FATAL, "Invalid input file index: %d.\n", file_idx);
exit_program(1);
}
if (negative)
/* disable some already defined maps */
for (i = 0; i < o->nb_stream_maps; i++) {
m = &o->stream_maps[i];
if (file_idx == m->file_index &&
check_stream_specifier(input_files[m->file_index]->ctx,
input_files[m->file_index]->ctx->streams[m->stream_index],
*p == ':' ? p + 1 : p) > 0)
m->disabled = 1;
}
else
for (i = 0; i < input_files[file_idx]->nb_streams; i++) {
if (check_stream_specifier(input_files[file_idx]->ctx, input_files[file_idx]->ctx->streams[i],
*p == ':' ? p + 1 : p) <= 0)
continue;
if (input_files[file_idx]->streams[i]->user_set_discard == AVDISCARD_ALL) {
disabled = 1;
continue;
}
GROW_ARRAY(o->stream_maps, o->nb_stream_maps);
m = &o->stream_maps[o->nb_stream_maps - 1];
m->file_index = file_idx;
m->stream_index = i;
}
}
if (!m) {
if (allow_unused) {
av_log(NULL, AV_LOG_VERBOSE, "Stream map '%s' matches no streams; ignoring.\n", arg);
} else if (disabled) {
av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches disabled streams.\n"
"To ignore this, add a trailing '?' to the map.\n", arg);
exit_program(1);
} else {
av_log(NULL, AV_LOG_FATAL, "Stream map '%s' matches no streams.\n"
"To ignore this, add a trailing '?' to the map.\n", arg);
exit_program(1);
}
}
av_freep(&map);
return 0;
}
static int opt_attach(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
GROW_ARRAY(o->attachments, o->nb_attachments);
o->attachments[o->nb_attachments - 1] = arg;
return 0;
}
#if FFMPEG_OPT_MAP_CHANNEL
static int opt_map_channel(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
int n;
AVStream *st;
AudioChannelMap *m;
char *allow_unused;
char *mapchan;
av_log(NULL, AV_LOG_WARNING,
"The -%s option is deprecated and will be removed. "
"It can be replaced by the 'pan' filter, or in some cases by "
"combinations of 'channelsplit', 'channelmap', 'amerge' filters.\n", opt);
mapchan = av_strdup(arg);
if (!mapchan)
return AVERROR(ENOMEM);
GROW_ARRAY(o->audio_channel_maps, o->nb_audio_channel_maps);
m = &o->audio_channel_maps[o->nb_audio_channel_maps - 1];
/* muted channel syntax */
n = sscanf(arg, "%d:%d.%d", &m->channel_idx, &m->ofile_idx, &m->ostream_idx);
if ((n == 1 || n == 3) && m->channel_idx == -1) {
m->file_idx = m->stream_idx = -1;
if (n == 1)
m->ofile_idx = m->ostream_idx = -1;
av_free(mapchan);
return 0;
}
/* normal syntax */
n = sscanf(arg, "%d.%d.%d:%d.%d",
&m->file_idx, &m->stream_idx, &m->channel_idx,
&m->ofile_idx, &m->ostream_idx);
if (n != 3 && n != 5) {
av_log(NULL, AV_LOG_FATAL, "Syntax error, mapchan usage: "
"[file.stream.channel|-1][:syncfile:syncstream]\n");
exit_program(1);
}
if (n != 5) // only file.stream.channel specified
m->ofile_idx = m->ostream_idx = -1;
/* check input */
if (m->file_idx < 0 || m->file_idx >= nb_input_files) {
av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file index: %d\n",
m->file_idx);
exit_program(1);
}
if (m->stream_idx < 0 ||
m->stream_idx >= input_files[m->file_idx]->nb_streams) {
av_log(NULL, AV_LOG_FATAL, "mapchan: invalid input file stream index #%d.%d\n",
m->file_idx, m->stream_idx);
exit_program(1);
}
st = input_files[m->file_idx]->ctx->streams[m->stream_idx];
if (st->codecpar->codec_type != AVMEDIA_TYPE_AUDIO) {
av_log(NULL, AV_LOG_FATAL, "mapchan: stream #%d.%d is not an audio stream.\n",
m->file_idx, m->stream_idx);
exit_program(1);
}
/* allow trailing ? to map_channel */
if (allow_unused = strchr(mapchan, '?'))
*allow_unused = 0;
if (m->channel_idx < 0 || m->channel_idx >= st->codecpar->ch_layout.nb_channels ||
input_files[m->file_idx]->streams[m->stream_idx]->user_set_discard == AVDISCARD_ALL) {
if (allow_unused) {
av_log(NULL, AV_LOG_VERBOSE, "mapchan: invalid audio channel #%d.%d.%d\n",
m->file_idx, m->stream_idx, m->channel_idx);
} else {
av_log(NULL, AV_LOG_FATAL, "mapchan: invalid audio channel #%d.%d.%d\n"
"To ignore this, add a trailing '?' to the map_channel.\n",
m->file_idx, m->stream_idx, m->channel_idx);
exit_program(1);
}
}
av_free(mapchan);
return 0;
}
#endif
static int opt_sdp_file(void *optctx, const char *opt, const char *arg)
{
av_free(sdp_filename);
sdp_filename = av_strdup(arg);
return 0;
}
#if CONFIG_VAAPI
static int opt_vaapi_device(void *optctx, const char *opt, const char *arg)
{
const char *prefix = "vaapi:";
char *tmp;
int err;
tmp = av_asprintf("%s%s", prefix, arg);
if (!tmp)
return AVERROR(ENOMEM);
err = hw_device_init_from_string(tmp, NULL);
av_free(tmp);
return err;
}
#endif
#if CONFIG_QSV
static int opt_qsv_device(void *optctx, const char *opt, const char *arg)
{
const char *prefix = "qsv=__qsv_device:hw_any,child_device=";
int err;
char *tmp = av_asprintf("%s%s", prefix, arg);
if (!tmp)
return AVERROR(ENOMEM);
err = hw_device_init_from_string(tmp, NULL);
av_free(tmp);
return err;
}
#endif
static int opt_init_hw_device(void *optctx, const char *opt, const char *arg)
{
if (!strcmp(arg, "list")) {
enum AVHWDeviceType type = AV_HWDEVICE_TYPE_NONE;
printf("Supported hardware device types:\n");
while ((type = av_hwdevice_iterate_types(type)) !=
AV_HWDEVICE_TYPE_NONE)
printf("%s\n", av_hwdevice_get_type_name(type));
printf("\n");
exit_program(0);
} else {
return hw_device_init_from_string(arg, NULL);
}
}
static int opt_filter_hw_device(void *optctx, const char *opt, const char *arg)
{
if (filter_hw_device) {
av_log(NULL, AV_LOG_ERROR, "Only one filter device can be used.\n");
return AVERROR(EINVAL);
}
filter_hw_device = hw_device_get_by_name(arg);
if (!filter_hw_device) {
av_log(NULL, AV_LOG_ERROR, "Invalid filter device %s.\n", arg);
return AVERROR(EINVAL);
}
return 0;
}
static int opt_recording_timestamp(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
char buf[128];
int64_t recording_timestamp = parse_time_or_die(opt, arg, 0) / 1E6;
struct tm time = *gmtime((time_t*)&recording_timestamp);
if (!strftime(buf, sizeof(buf), "creation_time=%Y-%m-%dT%H:%M:%S%z", &time))
return -1;
parse_option(o, "metadata", buf, options);
av_log(NULL, AV_LOG_WARNING, "%s is deprecated, set the 'creation_time' metadata "
"tag instead.\n", opt);
return 0;
}
const AVCodec *find_codec_or_die(void *logctx, const char *name,
enum AVMediaType type, int encoder)
{
const AVCodecDescriptor *desc;
const char *codec_string = encoder ? "encoder" : "decoder";
const AVCodec *codec;
codec = encoder ?
avcodec_find_encoder_by_name(name) :
avcodec_find_decoder_by_name(name);
if (!codec && (desc = avcodec_descriptor_get_by_name(name))) {
codec = encoder ? avcodec_find_encoder(desc->id) :
avcodec_find_decoder(desc->id);
if (codec)
av_log(logctx, AV_LOG_VERBOSE, "Matched %s '%s' for codec '%s'.\n",
codec_string, codec->name, desc->name);
}
if (!codec) {
av_log(logctx, AV_LOG_FATAL, "Unknown %s '%s'\n", codec_string, name);
exit_program(1);
}
if (codec->type != type && !recast_media) {
av_log(logctx, AV_LOG_FATAL, "Invalid %s type '%s'\n", codec_string, name);
exit_program(1);
}
return codec;
}
void assert_file_overwrite(const char *filename)
{
const char *proto_name = avio_find_protocol_name(filename);
if (file_overwrite && no_file_overwrite) {
fprintf(stderr, "Error, both -y and -n supplied. Exiting.\n");
exit_program(1);
}
if (!file_overwrite) {
if (proto_name && !strcmp(proto_name, "file") && avio_check(filename, 0) == 0) {
if (stdin_interaction && !no_file_overwrite) {
fprintf(stderr,"File '%s' already exists. Overwrite? [y/N] ", filename);
fflush(stderr);
term_exit();
signal(SIGINT, SIG_DFL);
if (!read_yesno()) {
av_log(NULL, AV_LOG_FATAL, "Not overwriting - exiting\n");
exit_program(1);
}
term_init();
}
else {
av_log(NULL, AV_LOG_FATAL, "File '%s' already exists. Exiting.\n", filename);
exit_program(1);
}
}
}
if (proto_name && !strcmp(proto_name, "file")) {
for (int i = 0; i < nb_input_files; i++) {
InputFile *file = input_files[i];
if (file->ctx->iformat->flags & AVFMT_NOFILE)
continue;
if (!strcmp(filename, file->ctx->url)) {
av_log(NULL, AV_LOG_FATAL, "Output %s same as Input #%d - exiting\n", filename, i);
av_log(NULL, AV_LOG_WARNING, "FFmpeg cannot edit existing files in-place.\n");
exit_program(1);
}
}
}
}
/* read file contents into a string */
char *file_read(const char *filename)
{
AVIOContext *pb = NULL;
int ret = avio_open(&pb, filename, AVIO_FLAG_READ);
AVBPrint bprint;
char *str;
if (ret < 0) {
av_log(NULL, AV_LOG_ERROR, "Error opening file %s.\n", filename);
return NULL;
}
av_bprint_init(&bprint, 0, AV_BPRINT_SIZE_UNLIMITED);
ret = avio_read_to_bprint(pb, &bprint, SIZE_MAX);
avio_closep(&pb);
if (ret < 0) {
av_bprint_finalize(&bprint, NULL);
return NULL;
}
ret = av_bprint_finalize(&bprint, &str);
if (ret < 0)
return NULL;
return str;
}
/* arg format is "output-stream-index:streamid-value". */
static int opt_streamid(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
int idx;
char *p;
char idx_str[16];
av_strlcpy(idx_str, arg, sizeof(idx_str));
p = strchr(idx_str, ':');
if (!p) {
av_log(NULL, AV_LOG_FATAL,
"Invalid value '%s' for option '%s', required syntax is 'index:value'\n",
arg, opt);
exit_program(1);
}
*p++ = '\0';
idx = parse_number_or_die(opt, idx_str, OPT_INT, 0, MAX_STREAMS-1);
o->streamid_map = grow_array(o->streamid_map, sizeof(*o->streamid_map), &o->nb_streamid_map, idx+1);
o->streamid_map[idx] = parse_number_or_die(opt, p, OPT_INT, 0, INT_MAX);
return 0;
}
static int init_complex_filters(void)
{
int i, ret = 0;
for (i = 0; i < nb_filtergraphs; i++) {
ret = init_complex_filtergraph(filtergraphs[i]);
if (ret < 0)
return ret;
}
return 0;
}
static int opt_target(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
enum { PAL, NTSC, FILM, UNKNOWN } norm = UNKNOWN;
static const char *const frame_rates[] = { "25", "30000/1001", "24000/1001" };
if (!strncmp(arg, "pal-", 4)) {
norm = PAL;
arg += 4;
} else if (!strncmp(arg, "ntsc-", 5)) {
norm = NTSC;
arg += 5;
} else if (!strncmp(arg, "film-", 5)) {
norm = FILM;
arg += 5;
} else {
/* Try to determine PAL/NTSC by peeking in the input files */
if (nb_input_files) {
int i, j;
for (j = 0; j < nb_input_files; j++) {
for (i = 0; i < input_files[j]->nb_streams; i++) {
AVStream *st = input_files[j]->ctx->streams[i];
int64_t fr;
if (st->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
continue;
fr = st->time_base.den * 1000LL / st->time_base.num;
if (fr == 25000) {
norm = PAL;
break;
} else if ((fr == 29970) || (fr == 23976)) {
norm = NTSC;
break;
}
}
if (norm != UNKNOWN)
break;
}
}
if (norm != UNKNOWN)
av_log(NULL, AV_LOG_INFO, "Assuming %s for target.\n", norm == PAL ? "PAL" : "NTSC");
}
if (norm == UNKNOWN) {
av_log(NULL, AV_LOG_FATAL, "Could not determine norm (PAL/NTSC/NTSC-Film) for target.\n");
av_log(NULL, AV_LOG_FATAL, "Please prefix target with \"pal-\", \"ntsc-\" or \"film-\",\n");
av_log(NULL, AV_LOG_FATAL, "or set a framerate with \"-r xxx\".\n");
exit_program(1);
}
if (!strcmp(arg, "vcd")) {
opt_video_codec(o, "c:v", "mpeg1video");
opt_audio_codec(o, "c:a", "mp2");
parse_option(o, "f", "vcd", options);
parse_option(o, "s", norm == PAL ? "352x288" : "352x240", options);
parse_option(o, "r", frame_rates[norm], options);
opt_default(NULL, "g", norm == PAL ? "15" : "18");
opt_default(NULL, "b:v", "1150000");
opt_default(NULL, "maxrate:v", "1150000");
opt_default(NULL, "minrate:v", "1150000");
opt_default(NULL, "bufsize:v", "327680"); // 40*1024*8;
opt_default(NULL, "b:a", "224000");
parse_option(o, "ar", "44100", options);
parse_option(o, "ac", "2", options);
opt_default(NULL, "packetsize", "2324");
opt_default(NULL, "muxrate", "1411200"); // 2352 * 75 * 8;
/* We have to offset the PTS, so that it is consistent with the SCR.
SCR starts at 36000, but the first two packs contain only padding
and the first pack from the other stream, respectively, may also have
been written before.
So the real data starts at SCR 36000+3*1200. */
o->mux_preload = (36000 + 3 * 1200) / 90000.0; // 0.44
} else if (!strcmp(arg, "svcd")) {
opt_video_codec(o, "c:v", "mpeg2video");
opt_audio_codec(o, "c:a", "mp2");
parse_option(o, "f", "svcd", options);
parse_option(o, "s", norm == PAL ? "480x576" : "480x480", options);
parse_option(o, "r", frame_rates[norm], options);
parse_option(o, "pix_fmt", "yuv420p", options);
opt_default(NULL, "g", norm == PAL ? "15" : "18");
opt_default(NULL, "b:v", "2040000");
opt_default(NULL, "maxrate:v", "2516000");
opt_default(NULL, "minrate:v", "0"); // 1145000;
opt_default(NULL, "bufsize:v", "1835008"); // 224*1024*8;
opt_default(NULL, "scan_offset", "1");
opt_default(NULL, "b:a", "224000");
parse_option(o, "ar", "44100", options);
opt_default(NULL, "packetsize", "2324");
} else if (!strcmp(arg, "dvd")) {
opt_video_codec(o, "c:v", "mpeg2video");
opt_audio_codec(o, "c:a", "ac3");
parse_option(o, "f", "dvd", options);
parse_option(o, "s", norm == PAL ? "720x576" : "720x480", options);
parse_option(o, "r", frame_rates[norm], options);
parse_option(o, "pix_fmt", "yuv420p", options);
opt_default(NULL, "g", norm == PAL ? "15" : "18");
opt_default(NULL, "b:v", "6000000");
opt_default(NULL, "maxrate:v", "9000000");
opt_default(NULL, "minrate:v", "0"); // 1500000;
opt_default(NULL, "bufsize:v", "1835008"); // 224*1024*8;
opt_default(NULL, "packetsize", "2048"); // from www.mpucoder.com: DVD sectors contain 2048 bytes of data, this is also the size of one pack.
opt_default(NULL, "muxrate", "10080000"); // from mplex project: data_rate = 1260000. mux_rate = data_rate * 8
opt_default(NULL, "b:a", "448000");
parse_option(o, "ar", "48000", options);
} else if (!strncmp(arg, "dv", 2)) {
parse_option(o, "f", "dv", options);
parse_option(o, "s", norm == PAL ? "720x576" : "720x480", options);
parse_option(o, "pix_fmt", !strncmp(arg, "dv50", 4) ? "yuv422p" :
norm == PAL ? "yuv420p" : "yuv411p", options);
parse_option(o, "r", frame_rates[norm], options);
parse_option(o, "ar", "48000", options);
parse_option(o, "ac", "2", options);
} else {
av_log(NULL, AV_LOG_ERROR, "Unknown target: %s\n", arg);
return AVERROR(EINVAL);
}
av_dict_copy(&o->g->codec_opts, codec_opts, AV_DICT_DONT_OVERWRITE);
av_dict_copy(&o->g->format_opts, format_opts, AV_DICT_DONT_OVERWRITE);
return 0;
}
static int opt_vstats_file(void *optctx, const char *opt, const char *arg)
{
av_free (vstats_filename);
vstats_filename = av_strdup (arg);
return 0;
}
static int opt_vstats(void *optctx, const char *opt, const char *arg)
{
char filename[40];
time_t today2 = time(NULL);
struct tm *today = localtime(&today2);
if (!today) { // maybe tomorrow
av_log(NULL, AV_LOG_FATAL, "Unable to get current time: %s\n", strerror(errno));
exit_program(1);
}
snprintf(filename, sizeof(filename), "vstats_%02d%02d%02d.log", today->tm_hour, today->tm_min,
today->tm_sec);
return opt_vstats_file(NULL, opt, filename);
}
static int opt_video_frames(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
return parse_option(o, "frames:v", arg, options);
}
static int opt_audio_frames(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
return parse_option(o, "frames:a", arg, options);
}
static int opt_data_frames(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
return parse_option(o, "frames:d", arg, options);
}
static int opt_default_new(OptionsContext *o, const char *opt, const char *arg)
{
int ret;
AVDictionary *cbak = codec_opts;
AVDictionary *fbak = format_opts;
codec_opts = NULL;
format_opts = NULL;
ret = opt_default(NULL, opt, arg);
av_dict_copy(&o->g->codec_opts , codec_opts, 0);
av_dict_copy(&o->g->format_opts, format_opts, 0);
av_dict_free(&codec_opts);
av_dict_free(&format_opts);
codec_opts = cbak;
format_opts = fbak;
return ret;
}
static int opt_preset(void *optctx, const char *opt, const char *arg)
{
OptionsContext *o = optctx;
FILE *f=NULL;
char filename[1000], line[1000], tmp_line[1000];
const char *codec_name = NULL;
tmp_line[0] = *opt;
tmp_line[1] = 0;
MATCH_PER_TYPE_OPT(codec_names, str, codec_name, NULL, tmp_line);
if (!(f = get_preset_file(filename, sizeof(filename), arg, *opt == 'f', codec_name))) {
if(!strncmp(arg, "libx264-lossless", strlen("libx264-lossless"))){
av_log(NULL, AV_LOG_FATAL, "Please use -preset <speed> -qp 0\n");
}else
av_log(NULL, AV_LOG_FATAL, "File for preset '%s' not found\n", arg);
exit_program(1);
}
while (fgets(line, sizeof(line), f)) {
char *key = tmp_line, *value, *endptr;
if (strcspn(line, "#\n\r") == 0)
continue;
av_strlcpy(tmp_line, line, sizeof(tmp_line));
if (!av_strtok(key, "=", &value) ||
!av_strtok(value, "\r\n", &endptr)) {
av_log(NULL, AV_LOG_FATAL, "%s: Invalid syntax: '%s'\n", filename, line);
exit_program(1);
}
av_log(NULL, AV_LOG_DEBUG, "ffpreset[%s]: set '%s' = '%s'\n", filename, key, value);
if (!strcmp(key, "acodec")) opt_audio_codec (o, key, value);
else if (!strcmp(key, "vcodec")) opt_video_codec (o, key, value);
else if (!strcmp(key, "scodec")) opt_subtitle_codec(o, key, value);
else if (!strcmp(key, "dcodec")) opt_data_codec (o, key, value);
else if (opt_default_new(o, key, value) < 0) {
av_log(NULL, AV_LOG_FATAL, "%s: Invalid option or argument: '%s', parsed as '%s' = '%s'\n",