avcodec/pngenc: restore image size before copying frame

Signed-off-by: Paul B Mahol <onemda@gmail.com>
9 years ago · c3320a51df
parent ae8a13c560
commit c3320a51df
1 changed files with 4 additions and 0 deletions
--- a/libavcodec/pngenc.c
+++ b/libavcodec/pngenc.c
@ -766,6 +766,8 @@ static int apng_encode_frame(AVCodecContext *avctx, const AVFrame *pict,

            // Do disposal
            if (last_fctl_chunk.dispose_op != APNG_DISPOSE_OP_PREVIOUS) {
+                diffFrame->width = pict->width;
+                diffFrame->height = pict->height;
                av_frame_copy(diffFrame, s->last_frame);

                if (last_fctl_chunk.dispose_op == APNG_DISPOSE_OP_BACKGROUND) {
@ -778,6 +780,8 @@ static int apng_encode_frame(AVCodecContext *avctx, const AVFrame *pict,
                if (!s->prev_frame)
                    continue;

+                diffFrame->width = pict->width;
+                diffFrame->height = pict->height;
                av_frame_copy(diffFrame, s->prev_frame);
            }