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avformat/img2enc: add frame_pts option for make output filename 

fix ticket id: #1452
when use frame_pts option, the output image name can be set with PTS
of current frame.

Signed-off-by: Steven Liu <lq@onvideo.cn>
This commit is contained in:
Steven Liu 2017-11-13 10:52:01 +08:00
parent 3ee63f3fb7
commit f3e34072aa
2 changed files with 16 additions and 0 deletions
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9
doc/muxers.texi
View File

@ -897,9 +897,18 @@ can be used:
ffmpeg -f v4l2 -r 1 -i /dev/video0 -f image2 -strftime 1 "%Y-%m-%d_%H-%M-%S.jpg"
@end example
You can set the file name with current frame's PTS:
@example
ffmpeg -f v4l2 -r 1 -i /dev/video0 -copyts -f image2 -frame_pts true %d.jpg"
@end example
@subsection Options
@table @option
@item frame_pts
If set to 1, expand the filename with pts from pkt->pts.
Default value is 0.
@item start_number
Start the sequence from the specified number. Default value is 1.

7
libavformat/img2enc.c
View File

@ -42,6 +42,7 @@ typedef struct VideoMuxData {
char target[4][1024];
int update;
int use_strftime;
int frame_pts;
const char *muxer;
int use_rename;
} VideoMuxData;
@ -99,6 +100,11 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt)
av_log(s, AV_LOG_ERROR, "Could not get frame filename with strftime\n");
return AVERROR(EINVAL);
}
} else if (img->frame_pts) {
if (av_get_frame_filename2(filename, sizeof(filename), img->path, pkt->pts, AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot write filename by pts of the frames.");
return AVERROR(EINVAL);
}
} else if (av_get_frame_filename2(filename, sizeof(filename), img->path,
img->img_number,
AV_FRAME_FILENAME_FLAGS_MULTIPLE) < 0 &&
@ -206,6 +212,7 @@ static const AVOption muxoptions[] = {
{ "update", "continuously overwrite one file", OFFSET(update), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC },
{ "start_number", "set first number in the sequence", OFFSET(img_number), AV_OPT_TYPE_INT, { .i64 = 1 }, 0, INT_MAX, ENC },
{ "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 },
{ NULL },
};