diff --git a/src/Codec/Transcode.cpp b/src/Codec/Transcode.cpp
index c1878216..1faf4a55 100644
--- a/src/Codec/Transcode.cpp
+++ b/src/Codec/Transcode.cpp
@@ -245,7 +245,7 @@ AVFrame *FFmpegFrame::get() const {
 void FFmpegFrame::fillPicture(AVPixelFormat target_format, int target_width, int target_height) {
     assert(_data == nullptr);
     _data = new char[av_image_get_buffer_size(target_format, target_width, target_height, 1)];
-    av_image_fill_arrays(_frame->data, _frame->linesize, (uint8_t *) _data,  target_format, target_width, target_height,1);
+    av_image_fill_arrays(_frame->data, _frame->linesize, (uint8_t *) _data,  target_format, target_width, target_height,32);
 }
 
 ///////////////////////////////////////////////////////////////////////////