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Fri Jan 19 10:00:40 CET 2007 · https://ffmpeg.org/pipermail/ffmpeg-devel/2007-January/027669.html

Hi,

This quick patch fixes a bug in the DVD subtitle decoder where
subtitles with odd heights would not have the last line decoded,
leaving the bottom line of the bitmap array uninitialised.

Ian


Index: libavcodec/dvdsubdec.c
===================================================================

--- libavcodec/dvdsubdec.c      (revision 7580)
+++ libavcodec/dvdsubdec.c      (working copy)
@@ -249,7 +249,7 @@
                 sub_header->rects = av_mallocz(sizeof(AVSubtitleRect));
                 sub_header->num_rects = 1;
                 sub_header->rects[0].rgba_palette = av_malloc(4 * 4);
-                decode_rle(bitmap, w * 2, w, h / 2,
+                decode_rle(bitmap, w * 2, w, (h + 1) / 2,
                            buf, offset1 * 2, buf_size);
                 decode_rle(bitmap + w, w * 2, w, h / 2,
                            buf, offset2 * 2, buf_size);




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Showing content from https://ffmpeg.org/pipermail/ffmpeg-devel/2007-January/027669.html below:

[Ffmpeg-devel] [PATCH] Fix for dvdsubdec.c