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Merge commit '9e6b5e61a0c91e25e298d0a21b189c4c95443795' 

* commit '9e6b5e61a0c91e25e298d0a21b189c4c95443795':
  img2enc: add an option for overwriting one file with subsequent images

Conflicts:
	doc/muxers.texi
	libavformat/img2enc.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-04-11 21:49:26 +02:00
parent 976e3439ed 9e6b5e61a0
commit 647fe2e777
2 changed files with 12 additions and 7 deletions
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8
doc/muxers.texi
View File

@ -245,9 +245,11 @@ ffmpeg -i in.avi -f image2 -frames:v 1 img.jpeg
Start the sequence from @var{number}. Default value is 1. Must be a
positive number.
@item updatefirst 1|0
If set to 1, update the first written image file again and
again. Default value is 0.
@item -update @var{number}
If @var{number} is nonzero, the filename will always be interpreted as just a
filename, not a pattern, and this file will be continuously overwritten with new
images.
@end table
The image muxer supports the .Y.U.V image file format. This format is

11
libavformat/img2enc.c
View File

@ -36,7 +36,7 @@ typedef struct {
int is_pipe;
int split_planes; /**< use independent file for each Y, U, V plane */
char path[1024];
int updatefirst;
int update;
} VideoMuxData;
static int write_header(AVFormatContext *s)
@ -75,8 +75,10 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
int i;
if (!img->is_pipe) {
if (av_get_frame_filename(filename, sizeof(filename),
img->path, img->img_number) < 0 && img->img_number > 1 && !img->updatefirst) {
if (img->update) {
av_strlcpy(filename, img->path, sizeof(filename));
} else if (av_get_frame_filename(filename, sizeof(filename), img->path, img->img_number) < 0 &&
img->img_number > 1) {
av_log(s, AV_LOG_ERROR,
"Could not get frame filename number %d from pattern '%s' (either set updatefirst or use a pattern like %%03d within the filename pattern)\n",
img->img_number, img->path);
@ -128,7 +130,8 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
#define OFFSET(x) offsetof(VideoMuxData, x)
#define ENC AV_OPT_FLAG_ENCODING_PARAM
static const AVOption muxoptions[] = {
{ "updatefirst", "update the first image file", OFFSET(updatefirst), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
{ "updatefirst", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
{ "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, ENC },
{ "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, ENC },
{ NULL },
};