On Fri, Nov 25, 2016 at 10:13:06PM +0100, Andreas Cadhalpun wrote:
> This fixes a segmentation fault caused by calling memcpy with NULL as
> second argument in handle_p_frame_apng.
>
> Signed-off-by: Andreas Cadhalpun <andreas.cadhal...@googlemail.com>
> ---
> libavcodec/pngdec.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
> index 36275ae..a7b330b 100644
> --- a/libavcodec/pngdec.c
> +++ b/libavcodec/pngdec.c
> @@ -922,7 +922,7 @@ static int decode_fctl_chunk(AVCodecContext *avctx,
> PNGDecContext *s,
> return AVERROR_INVALIDDATA;
> }
>
> - if (sequence_number == 0 && dispose_op == APNG_DISPOSE_OP_PREVIOUS) {
> + if (!s->previous_picture.f->data[0] && dispose_op ==
> APNG_DISPOSE_OP_PREVIOUS) {
> // No previous frame to revert to for the first frame
> // Spec says to just treat it as a APNG_DISPOSE_OP_BACKGROUND
> dispose_op = APNG_DISPOSE_OP_BACKGROUND;wont this be different when seeking back to the first frame ? is that intended ? [...] -- Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB The greatest way to live with honor in this world is to be what we pretend to be. -- Socrates
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