From: Jacob Graff <ja...@giphy.com>
Resolves issues with some transparent gifs.
see https://trac.ffmpeg.org/ticket/7890
contribution by Jacob Graff <ja...@giphy.com>
---
libavcodec/gif.c | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/libavcodec/gif.c b/libavcodec/gif.c
index 94c8b1af49..d7768b4426 100644
--- a/libavcodec/gif.c
+++ b/libavcodec/gif.c
@@ -136,7 +136,7 @@ static void gif_crop_translucent(AVCodecContext *avctx,
while (*y_start < y_end) {
int is_trans = 1;
for (int i = 0; i < w; i++) {
- if (buf[w * *y_start + i] != trans) {
+ if (buf[linesize * *y_start + i] != trans) {
is_trans = 0;
break;
}
@@ -148,10 +148,10 @@ static void gif_crop_translucent(AVCodecContext *avctx,
}
// crop bottom
- while (y_end < h) {
+ while (y_end > *y_start) {
int is_trans = 1;
for (int i = 0; i < w; i++) {
- if (buf[w * y_end + i] != trans) {
+ if (buf[linesize * y_end + i] != trans) {
is_trans = 0;
break;
}
@@ -165,7 +165,7 @@ static void gif_crop_translucent(AVCodecContext *avctx,
while (*x_start < x_end) {
int is_trans = 1;
for (int i = *y_start; i < y_end; i++) {
- if (buf[w * i + *x_start] != trans) {
+ if (buf[linesize * i + *x_start] != trans) {
is_trans = 0;
break;
}
@@ -176,10 +176,10 @@ static void gif_crop_translucent(AVCodecContext *avctx,
}
// crop right
- while (x_end < w) {
+ while (x_end > *x_start) {
int is_trans = 1;
for (int i = *y_start; i < y_end; i++) {
- if (buf[w * i + x_end] != trans) {
+ if (buf[linesize * i + x_end] != trans) {
is_trans = 0;
break;
}
--
2.19.1
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