Hi! As requested on ffmpeg-user.
Please comment, Carl Eugen
diff --git a/doc/muxers.texi b/doc/muxers.texi index f2ad7fe..6ccbab1 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -522,6 +522,10 @@ 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 reverse +If set to 1, the sequence number will be decreased for every image. +It is recommended to set a (high) @option(start_number) when using this option. @end table The image muxer supports the .Y.U.V image file format. This format is diff --git a/libavformat/img2enc.c b/libavformat/img2enc.c index ebbac2b..f664cb7 100644 --- a/libavformat/img2enc.c +++ b/libavformat/img2enc.c @@ -44,6 +44,7 @@ typedef struct VideoMuxData { int use_strftime; const char *muxer; int use_rename; + int reverse; } VideoMuxData; static int write_header(AVFormatContext *s) @@ -182,7 +183,11 @@ static int write_packet(AVFormatContext *s, AVPacket *pkt) } } - img->img_number++; + if (img->reverse) { + img->img_number--; + } else { + img->img_number++; + } return 0; } @@ -205,6 +210,7 @@ static const AVOption muxoptions[] = { { "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 }, { "atomic_writing", "write files atomically (using temporary files and renames)", OFFSET(use_rename), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC }, + { "reverse", "decrease the sequence number with every image", OFFSET(reverse), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ENC }, { NULL }, };
_______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel