[FFmpeg-devel] [RFC] avfilter_request_frame() crash

Stefano Sabatini stefano.sabatini-lala
Mon Jan 12 21:53:27 CET 2009

Hi all,

when calling avfilter_request_frame() on a link with no source it
crashes, for example with:

ffplay -f video4linux -s 320x240 /dev/video -vfilters "[in] setpts=PTS-STARTPTS, hflip, setpts=PTS-STARTPTS [foo]"

Should we:
1) add a check in avfilter_request_frame(), so that it will return -1
   if the link source is NULL
2) ensure that no dangling links exist before to start to extract
   filters from the filterchain
3) both 1) and 2)

Option 1) seems safest but will introduce a check at each run,
slightly slowing down the whole filtering process.

FFmpeg = Fostering and Freak Mythic Puritan Earthshaking Gargoyle

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