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feat(ffmpeg): select frame by duration and float position

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This commit is contained in:
Adrian Shum 2022-10-22 02:46:19 +08:00
parent 7c18dcda7a
commit 3b02ab7458
15 changed files with 14 additions and 9 deletions
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11
ffmpeg/ffmpeg.go
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@ -243,9 +243,7 @@ func incrementDuration(av *AVContext, frame *C.AVFrame, i C.int) {
ptsToNano := C.int64_t(1000000000 * av.stream.time_base.num / av.stream.time_base.den)
newDuration := time.Duration(frame.pts * ptsToNano)
av.availableDuration = newDuration
if av.selectedDuration > 0 && i > 0 && newDuration <= av.selectedDuration {
av.selectedIndex = i
}
if !av.durationInFormat && newDuration > av.duration {
av.duration = newDuration
}
@ -325,6 +323,13 @@ func populateThumbContext(av *AVContext, frames chan *C.AVFrame, n C.int, done <
incrementDuration(av, frame, i)
frames <- frame
frame = nil
if av.selectedDuration > 0 {
if av.availableDuration <= av.selectedDuration {
av.selectedIndex = i
} else {
break
}
}
}
if av.selectedIndex > av.availableIndex {
av.selectedIndex = av.availableIndex