BtbN changed the topic of #ffmpeg to: Welcome to the FFmpeg USER support channel | Development channel: #ffmpeg-devel | Bug reports: https://ffmpeg.org/bugreports.html | Wiki: https://trac.ffmpeg.org/ | This channel is publically logged | FFmpeg 7.0 is released
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<johnjaye>
i think i finally figured it out
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<johnjaye>
video sources like 'yuvtestsrc' require the 'lavfi' specifier before it to work
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<johnjaye>
is there a way for videos to have transparent areas?
<johnjaye>
or is that only for images? I want to overlay a video with top part solid and bottom part transparent but for a logo, then take the whole thing overlaid onto another vid
<johnjaye>
the current way i'm doing it is to put the logo and top video on separately
<JEEB>
there are some formats that have proper alpha support, such as Ut Video
<JEEB>
then there's various formats where it's a randomly tacked on feature, where it's usually a secondary picture that needs to be completely separately decoded
<JEEB>
which is what the VPx series of video formats has had, or how the HEVC spec was extended
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<johnjaye>
hmm, sounds like too much work
<johnjaye>
everything is 264 anyway
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<furq>
johnjaye: if it's just for an intermediate file then ffv1 and some other lossless codecs support it
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<johnjaye>
ah yes. ffmpeg video codec #1
<furq>
it sounds like you could do it without an intermediate though
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<johnjaye>
well i think i figured out how to get drawtext filter to work on windows
<johnjaye>
so i think it's moot either way. i was trying to figure out if i want to put these 10 video clips plus the 10 logos/subtitles on
<johnjaye>
i.e. all vids first then the logos. or do 1 vid + 1 logo at a time. the problem being the logo goes on the bottom and the overlay vid on top
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