The EXR decoder cannot handle the image files included in NVidia's HDR SDK.
After debugging, I found that the line offset table in the image files
contained 0's. Other EXR decoders, including the official OpenEXR decoder, can
detect and reconstruct missing line offset tables, so I added some code to do
so.
I filed a trac ticket for this issue here: https://trac.ffmpeg.org/ticket/6220.
The patch is below.
Regards,Dzung Hoang
diff --git a/libavcodec/exr.c b/libavcodec/exr.c
index 034920f..de48e76 100644
--- a/libavcodec/exr.c
+++ b/libavcodec/exr.c
@@ -1726,6 +1726,24 @@ static intdecode_frame(AVCodecContext *avctx, void *data,
if(bytestream2_get_bytes_left(&s->gb) < nb_blocks * 8)
returnAVERROR_INVALIDDATA;
+ // check offset table
+ if (bytestream2_peek_le64(&s->gb)== 0)
+ {
+ uint64_t *table= (uint64_t *)s->gb.buffer;
+ uint8_t *head =avpkt->data;
+ uint8_t *marker= head + bytestream2_tell(&s->gb) + nb_blocks * 8;
+ uint64_t offset;
+
+ av_log(s->avctx, AV_LOG_DEBUG, "recreating invalid offsettable\n");
+
+ for (y = 0; y< nb_blocks; y++)
+ {
+ offset = marker - head;
+ table[y] = offset;
+ marker += ((uint32_t *)marker)[1] + 8;
+ }
+ }
+
// save pointer we are going to usein decode_block
s->buf = avpkt->data;
s->buf_size = avpkt->size;
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