[FFmpeg-devel] [PATCH]Decode png frames without iend chunk

[Carl Eugen Hoyos]

Hi!

Attached patch allows decoding of png frames without iend chunk, this is what 
all web browers (except Konqueror) do.
Since the chunk is required by the specification, printing an error is 
expected imo.
Fixes ticket #3357

Please comment, Carl Eugen
-------------- next part --------------
diff --git a/libavcodec/pngdec.c b/libavcodec/pngdec.c
index 516dd41..12e8b11 100644
--- a/libavcodec/pngdec.c
+++ b/libavcodec/pngdec.c
@@ -546,6 +546,8 @@ static int decode_frame(AVCodecContext *avctx,
     for (;;) {
         if (bytestream2_get_bytes_left(&s->gb) <= 0) {
             av_log(avctx, AV_LOG_ERROR, "No bytes left\n");
+            if (s->state & PNG_ALLIMAGE)
+                goto exit_loop;
             goto fail;
         }