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avformat/img2enc: add support for specifying protocol options 

v2: simplified example

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2019-12-27 01:19:17 +01:00
parent a8ceb2a72f
commit 3ffe3b1db0
3 changed files with 24 additions and 2 deletions
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11
doc/muxers.texi
View File

@ -1215,6 +1215,11 @@ overwritten with new images. Default value is 0.
@item strftime
If set to 1, expand the filename with date and time information from
@code{strftime()}. Default value is 0.
@item protocol_opts @var{options_list}
Set protocol options as a :-separated list of key=value parameters. Values
containing the @code{:} special character must be escaped.
@end table
@subsection Examples
@ -1257,6 +1262,12 @@ You can set the file name with current frame's PTS:
ffmpeg -f v4l2 -r 1 -i /dev/video0 -copyts -f image2 -frame_pts true %d.jpg"
@end example
A more complex example is to publish contents of your desktop directly to a
WebDAV server every second:
@example
ffmpeg -f x11grab -framerate 1 -i :0.0 -q:v 6 -update 1 -protocol_opts method=PUT http://example.com/desktop.jpg
@end example
@section matroska
Matroska container muxer.

13
libavformat/img2enc.c
View File

@ -23,6 +23,7 @@
#include "libavutil/intreadwrite.h"
#include "libavutil/avassert.h"
#include "libavutil/avstring.h"
#include "libavutil/dict.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
#include "libavutil/pixdesc.h"
@ -44,6 +45,7 @@ typedef struct VideoMuxData {
int frame_pts;
const char *muxer;
int use_rename;
AVDictionary *protocol_opts;
} VideoMuxData;
static int write_header(AVFormatContext *s)
@ -132,6 +134,7 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(par->format);
int ret, i;
int nb_renames = 0;
AVDictionary *options = NULL;
if (img->update) {
av_strlcpy(filename, img->path, sizeof(filename));
@ -160,13 +163,19 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
return AVERROR(EINVAL);
}
for (i = 0; i < 4; i++) {
av_dict_copy(&options, img->protocol_opts, 0);
snprintf(img->tmp[i], sizeof(img->tmp[i]), "%s.tmp", filename);
av_strlcpy(img->target[i], filename, sizeof(img->target[i]));
if (s->io_open(s, &pb[i], img->use_rename ? img->tmp[i] : filename, AVIO_FLAG_WRITE, NULL) < 0) {
if (s->io_open(s, &pb[i], img->use_rename ? img->tmp[i] : filename, AVIO_FLAG_WRITE, &options) < 0) {
av_log(s, AV_LOG_ERROR, "Could not open file : %s\n", img->use_rename ? img->tmp[i] : filename);
ret = AVERROR(EIO);
goto fail;
}
if (options) {
av_log(s, AV_LOG_ERROR, "Could not recognize some protocol options\n");
ret = AVERROR(EINVAL);
goto fail;
}
if (!img->split_planes || i+1 >= desc->nb_components)
break;
@ -210,6 +219,7 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
return 0;
fail:
av_dict_free(&options);
for (i = 0; i < FF_ARRAY_ELEMS(pb); i++)
if (pb[i])
ff_format_io_close(s, &pb[i]);
@ -235,6 +245,7 @@ static const AVOption muxoptions[] = {
{ "strftime", "use strftime for filename", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "frame_pts", "use current frame pts for filename", OFFSET(frame_pts), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "protocol_opts", "specify protocol options for the opened files", OFFSET(protocol_opts), AV_OPT_TYPE_DICT, {0}, 0, 0, ENC },
{ NULL },
};

2
libavformat/version.h
View File

@ -33,7 +33,7 @@
// Also please add any ticket numbers that you believe might be affected here
#define LIBAVFORMAT_VERSION_MAJOR 58
#define LIBAVFORMAT_VERSION_MINOR 35
#define LIBAVFORMAT_VERSION_MICRO 103
#define LIBAVFORMAT_VERSION_MICRO 104
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \