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  1. 2nd Apr 2013 13:39 #1
    livestream
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    Hello, I'm trying to generate 5 random thumbs out of some videos with this command
    Code:
    ffmpeg -i input_file.flv -an -s 320x240 -y -f image2 -vframes 5 /home/imgpath
    mos of the time it works but for some video it just generates 5 black thumbs, why ?
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  2. 2nd Apr 2013 13:50 #2
    Selur
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    probably a problem decoding the input after jumping inside the stream,..
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  3. 2nd Apr 2013 14:00 #3
    livestream
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    how can I solve ?
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  4. 2nd Apr 2013 14:24 #4
    Selur
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    What's the video format inside the flv container?
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  5. 2nd Apr 2013 14:59 #5
    livestream
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    I coded it with h.264
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  6. 2nd Apr 2013 15:04 #6
    Selur
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    Normally ffmpeg should be able to playback h.264 content it created without a problem,.. it might help if you specify:
    Code:
    -vcodec png -b:v 2000 -bt 20M
    Cu Selur
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