avconv: add -dump_attachment option.
This commit is contained in:
Anton Khirnov
parent
4dbc6ceef5
commit
a2c0b830d5
88
avconv.c
88
avconv.c
@ -275,6 +275,8 @@ typedef struct OptionsContext {
|
||||
|
||||
SpecifierOpt *ts_scale;
|
||||
int nb_ts_scale;
|
||||
SpecifierOpt *dump_attachment;
|
||||
int nb_dump_attachment;
|
||||
|
||||
/* output options */
|
||||
StreamMap *stream_maps;
|
||||
@ -2843,6 +2845,60 @@ static void add_input_streams(OptionsContext *o, AVFormatContext *ic)
|
||||
}
|
||||
}
|
||||
|
||||
static void assert_file_overwrite(const char *filename)
|
||||
{
|
||||
if (!file_overwrite &&
|
||||
(strchr(filename, ':') == NULL || filename[1] == ':' ||
|
||||
av_strstart(filename, "file:", NULL))) {
|
||||
if (avio_check(filename, 0) == 0) {
|
||||
if (!using_stdin) {
|
||||
fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
|
||||
fflush(stderr);
|
||||
if (!read_yesno()) {
|
||||
fprintf(stderr, "Not overwriting - exiting\n");
|
||||
exit_program(1);
|
||||
}
|
||||
}
|
||||
else {
|
||||
fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
|
||||
exit_program(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
static void dump_attachment(AVStream *st, const char *filename)
|
||||
{
|
||||
int ret;
|
||||
AVIOContext *out = NULL;
|
||||
AVDictionaryEntry *e;
|
||||
|
||||
if (!st->codec->extradata_size) {
|
||||
av_log(NULL, AV_LOG_WARNING, "No extradata to dump in stream #%d:%d.\n",
|
||||
nb_input_files - 1, st->index);
|
||||
return;
|
||||
}
|
||||
if (!*filename && (e = av_dict_get(st->metadata, "filename", NULL, 0)))
|
||||
filename = e->value;
|
||||
if (!*filename) {
|
||||
av_log(NULL, AV_LOG_FATAL, "No filename specified and no 'filename' tag"
|
||||
"in stream #%d:%d.\n", nb_input_files - 1, st->index);
|
||||
exit_program(1);
|
||||
}
|
||||
|
||||
assert_file_overwrite(filename);
|
||||
|
||||
if ((ret = avio_open (&out, filename, AVIO_FLAG_WRITE)) < 0) {
|
||||
av_log(NULL, AV_LOG_FATAL, "Could not open file %s for writing.\n",
|
||||
filename);
|
||||
exit_program(1);
|
||||
}
|
||||
|
||||
avio_write(out, st->codec->extradata, st->codec->extradata_size);
|
||||
avio_flush(out);
|
||||
avio_close(out);
|
||||
}
|
||||
|
||||
static int opt_input_file(OptionsContext *o, const char *opt, const char *filename)
|
||||
{
|
||||
AVFormatContext *ic;
|
||||
@ -2943,6 +2999,17 @@ static int opt_input_file(OptionsContext *o, const char *opt, const char *filena
|
||||
input_files[nb_input_files - 1].nb_streams = ic->nb_streams;
|
||||
input_files[nb_input_files - 1].rate_emu = o->rate_emu;
|
||||
|
||||
for (i = 0; i < o->nb_dump_attachment; i++) {
|
||||
int j;
|
||||
|
||||
for (j = 0; j < ic->nb_streams; j++) {
|
||||
AVStream *st = ic->streams[j];
|
||||
|
||||
if (check_stream_specifier(ic, st, o->dump_attachment[i].specifier) == 1)
|
||||
dump_attachment(st, o->dump_attachment[i].u.str);
|
||||
}
|
||||
}
|
||||
|
||||
for (i = 0; i < orig_nb_streams; i++)
|
||||
av_dict_free(&opts[i]);
|
||||
av_freep(&opts);
|
||||
@ -3602,25 +3669,7 @@ static void opt_output_file(void *optctx, const char *filename)
|
||||
|
||||
if (!(oc->oformat->flags & AVFMT_NOFILE)) {
|
||||
/* test if it already exists to avoid loosing precious files */
|
||||
if (!file_overwrite &&
|
||||
(strchr(filename, ':') == NULL ||
|
||||
filename[1] == ':' ||
|
||||
av_strstart(filename, "file:", NULL))) {
|
||||
if (avio_check(filename, 0) == 0) {
|
||||
if (!using_stdin) {
|
||||
fprintf(stderr,"File '%s' already exists. Overwrite ? [y/N] ", filename);
|
||||
fflush(stderr);
|
||||
if (!read_yesno()) {
|
||||
fprintf(stderr, "Not overwriting - exiting\n");
|
||||
exit_program(1);
|
||||
}
|
||||
}
|
||||
else {
|
||||
fprintf(stderr,"File '%s' already exists. Exiting.\n", filename);
|
||||
exit_program(1);
|
||||
}
|
||||
}
|
||||
}
|
||||
assert_file_overwrite(filename);
|
||||
|
||||
/* open the file */
|
||||
if ((err = avio_open(&oc->pb, filename, AVIO_FLAG_WRITE)) < 0) {
|
||||
@ -4086,6 +4135,7 @@ static const OptionDef options[] = {
|
||||
#endif
|
||||
{ "stats", OPT_BOOL, {&print_stats}, "print progress report during encoding", },
|
||||
{ "attach", HAS_ARG | OPT_FUNC2, {(void*)opt_attach}, "add an attachment to the output file", "filename" },
|
||||
{ "dump_attachment", HAS_ARG | OPT_STRING | OPT_SPEC, {.off = OFFSET(dump_attachment)}, "extract an attachment into a file", "filename" },
|
||||
|
||||
/* video options */
|
||||
{ "vframes", HAS_ARG | OPT_VIDEO | OPT_FUNC2, {(void*)opt_video_frames}, "set the number of video frames to record", "number" },
|
||||
|
||||
@ -207,6 +207,24 @@ avconv -i INPUT -attach DejaVuSans.ttf -metadata:s:2 mimetype=application/x-true
|
||||
@end example
|
||||
(assuming that the attachment stream will be third in the output file).
|
||||
|
||||
@item -dump_attachment[:@var{stream_specifier}] @var{filename} (@emph{input,per-stream})
|
||||
Extract the matching attachment stream into a file named @var{filename}. If
|
||||
@var{filename} is empty, then the value of the @code{filename} metadata tag
|
||||
will be used.
|
||||
|
||||
E.g. to extract the first attachment to a file named 'out.ttf':
|
||||
@example
|
||||
avconv -dump_attachment:t:0 out.ttf INPUT
|
||||
@end example
|
||||
To extract all attachments to files determined by the @code{filename} tag:
|
||||
@example
|
||||
avconv -dump_attachment:t "" INPUT
|
||||
@end example
|
||||
|
||||
Technical note -- attachments are implemented as codec extradata, so this
|
||||
option can actually be used to extract extradata from any stream, not just
|
||||
attachments.
|
||||
|
||||
@end table
|
||||
|
||||
@section Video Options
|
||||
|
||||
Loading…
Reference in New Issue
Block a user