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avfilter/vf_signature: Dont crash on no frames

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 3d5f03bbc8bba2929cc09b07d2731ae5d392e772)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-02-12 19:40:07 +01:00
parent 74e4e900bb
commit 7570390be6
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GPG Key ID: B18E8928B3948D64
1 changed files with 3 additions and 0 deletions
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libavfilter/vf_signature.c
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@ -379,6 +379,9 @@ static int xml_export(AVFilterContext *ctx, StreamContext *sc, const char* filen
FILE* f;
unsigned int pot3[5] = { 3*3*3*3, 3*3*3, 3*3, 3, 1 };
if (!sc->coarseend->last)
return AVERROR(EINVAL); // No frames ?
f = avpriv_fopen_utf8(filename, "w");
if (!f) {
int err = AVERROR(EINVAL);