[FFmpeg-devel] [PATCH 1/3] flvdec: Check index for being valid Fixes seeking in Enigma_Principles_of_Lust.flv

Michael Niedermayer michaelni at gmx.at
Fri Dec 30 04:28:56 CET 2011

On Thu, Dec 29, 2011 at 10:19:57PM -0500, Derek Buitenhuis wrote:
> On 29/12/2011 10:05 PM, Michael Niedermayer wrote:
> >>>-    if (timeslen == fileposlen&&  fileposlen&&  max_pos<= filepositions[0]) {
> >>>+    if (timeslen == fileposlen&&  fileposlen>1&&  max_pos<= filepositions[0]) {
> >>
> >>I'm not sure where the >1 comes in? Wouldn't this change behavior
> >>on previously working files?
> >
> >yes and no, it would only affect files with just one keyframe. And
> >the "runtime" indexing would add that in an instant without this code.
> >it could be done a bit differently but then indexes with just one
> >keyframe would not be checked
> Hmm. I don't see a "nice" solution for this, I guess. Oh well.
> >>>+        if (size0>  filepositions[1] || FFABS(dts - times[1]*1000)>5000)
> >>
> >>Where does this magic number (5000) come from? Again, sorry if I missed
> >>this.
> >
> >just a random value (5 seconds) to avoid discarding an index due to
> >the timestamps being a bit off.
> >one surely can discuss the value for hours id say though 5sec is as
> >good as any until theres a testcase that needs something else.
> No need to bikeshed the value, I suppose.
> OK.

applied, thanks

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

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