[Ffmpeg-devel] [PATCH] Fix for the lol-ffplay.ogm testcase

Luca Abeni lucabe72
Wed Jan 17 11:28:16 CET 2007

Hi Takis,

On Wed, 2007-01-17 at 10:40 +0100, Panagiotis Issaris wrote:
> Hi,
> Attached are two trivial patches with different approaches to prevent
> the segfault as demonstrated by lol-ffplay.ogm.

-                if (ost->video_resample)
+                if (ost->video_resample && ost->img_resample_ctx)
I think the real bug here is that ost->video_resample != 0, but
ost->img_resample_ctx == NULL. So, this looks more a workarond than a
real fix. I suspect the problem is a missing check for errors
somewhere... I'll have a look later.

void sws_freeContext(struct SwsContext *ctx)
+    if (!ctx)
+        return;
I do not know if calling sws_freeContext(NULL) is a bug or not... So,
maybe committing this code is the right thing to do.
But I'd prefer to fix the calling code anyway. I'll check ffmpeg.c
during the lunch break.

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