6 ms·

I used this to stabilize a bunch of vacation videos with great results. It works better than the deshake filter but does require two passes. function stabil

I used this to stabilize a bunch of vacation videos with great results. It works better than the deshake filter but does require two passes. function stabilize { tempfile=".temp$RANDOM$RANDOM.trf" ffmpeg -nostdin -loglevel error -y -i "$1" -vf vidstabdetect=shakiness=5:show=1:result="$tempfile" -f null - ffmpeg -nostdin -loglevel error -y -i "$1" -vf vidstabtransform=input="$tempfile",unsharp=5:5:0.8:3:3:0.4 -movflags +faststart "$2" rm "$tempfile" } Usage: stabilize infile outfile.mp4

mehrdadn 6y ago
Thank you! I'll give it a try. Update: Just tried it. It seems to do some kind of blurring to smooth the vibrations over several frames instead of trying to cancel the shaking by inverse-transforming the frame with respect to the shake. I think I've tried this in my experiments before -- and I guess it's the difference between "de-shake" and "stabilization"? Sadly it doesn't really seem better to my eyes sadly, but thanks for the help anyway.
- iwalton3 6y ago
  It does have a mild blur filter which you can remove, but if it isn’t actually stabilizing the video from shakiness, something is wrong. See here: https://ffmpeg.org/ffmpeg-filters.html#vidstabdetect-1 https://ffmpeg.org/ffmpeg-filters.html#vidstabdetect-1 Maybe your ffmpeg build doesn’t have it? Also try removing the log level parameter.
  - mehrdadn 6y ago
    It is stabilizing, just not in the way (or as much) as I imagined, is the issue. I tried to describe it, not really sure how else to. But it's not really the same kind of output I'm expecting from a deshaking filter. I'd expect black margins etc. to bleed in for example, but I don't see that here.
    - foxes 6y ago
      >This filter generates a file with relative translation and rotation transform information about subsequent frames >which is then used by the vidstabtransform filter. The first pass is meant to find the rotation, then I assume the next pass cancels it out.
      - mehrdadn 6y ago
        Maybe my terminology is wrong, but what I'm talking about is basically what you see with the biker and pen here, or the washing machine at 3:44: https://www.youtube.com/watch?v=I6E6InIQ76Q&t=9s https://www.youtube.com/watch?v=I6E6InIQ76Q&t=9s They stay stable in the center whereas the rest of the frame is transformed. This necessarily requires introducing black/white crop frames into the image with all kinds of shapes and sizes, but it turns out incredibly smooth and doesn't lose any of the frame. It also requires no noticeable blurring at all from what I can tell. But that doesn't seem to be quite what's happening with these commands though.
        jacobush 6y ago
        You can also reuse previous and following frames instead of using solid color borders
        ShamelessC 6y ago
        I believe what you're looking for is what Reddit's popular bot u/stabbot does. I was able to find this comment thread where a user posted some ffmpeg scripts to replicate the behavior. Am on mobile currently so I can't verify they do what you're looking for but here's a snippet. //PART 1 [Defaults: shakiness=5:accuracy=15:stepsize=6:mincontrast=0.3:show=0] ffmpeg -i shaky-input.mp4 -vf vidstabdetect=shakiness=5:accuracy=15:stepsize=6:mincontrast=0.3:show=2 dummy_crop.mp4 //PART 2 ffmpeg -i shaky-input.mp4 -vf scale=trunc((iw0.90)/2)2:trunc(ow/a/2)*2 scaled_crop.mp4 //PART 3 [-strict -2 ONLY IF OPUS AUDIO] - [Unsharp Default: '5:5:1.0:5:5:0.0'] ffmpeg -i scaled_crop.mp4 -vf vidstabtransform=smoothing=20:input="transforms.trf":interpol=no:zoom=-10:optzoom=2,unsharp=5:5:0.8:3:3:0.4 stabilized_crop-output.mp4 https://www.reddit.com/r/stabbot/comments/9f7ayj/comment/e5xd7md https://www.reddit.com/r/stabbot/comments/9f7ayj/comment/e5x...
- pocak 6y ago
  It works by applying a low-pass filter on the camera's motion, so a sudden kick turns into a slow, low amplitude bob. Perhaps you just need to increase the smoothing parameter. I found the default of 10 way too low, and needed around 50-100 for my very shaky 50 fps home videos.

mehrdadn 6y ago

Thank you! I'll give it a try. Update: Just tried it. It seems to do some kind of blurring to smooth the vibrations over several frames instead of trying to cancel the shaking by inverse-transforming the frame with respect to the shake. I think I've tried this in my experiments before -- and I guess it's the difference between "de-shake" and "stabilization"? Sadly it doesn't really seem better to my eyes sadly, but thanks for the help anyway.

iwalton3 6y ago
It does have a mild blur filter which you can remove, but if it isn’t actually stabilizing the video from shakiness, something is wrong. See here: https://ffmpeg.org/ffmpeg-filters.html#vidstabdetect-1 https://ffmpeg.org/ffmpeg-filters.html#vidstabdetect-1 Maybe your ffmpeg build doesn’t have it? Also try removing the log level parameter.
- mehrdadn 6y ago
  It is stabilizing, just not in the way (or as much) as I imagined, is the issue. I tried to describe it, not really sure how else to. But it's not really the same kind of output I'm expecting from a deshaking filter. I'd expect black margins etc. to bleed in for example, but I don't see that here.
  - foxes 6y ago
    >This filter generates a file with relative translation and rotation transform information about subsequent frames >which is then used by the vidstabtransform filter. The first pass is meant to find the rotation, then I assume the next pass cancels it out.
    - mehrdadn 6y ago
      Maybe my terminology is wrong, but what I'm talking about is basically what you see with the biker and pen here, or the washing machine at 3:44: https://www.youtube.com/watch?v=I6E6InIQ76Q&t=9s https://www.youtube.com/watch?v=I6E6InIQ76Q&t=9s They stay stable in the center whereas the rest of the frame is transformed. This necessarily requires introducing black/white crop frames into the image with all kinds of shapes and sizes, but it turns out incredibly smooth and doesn't lose any of the frame. It also requires no noticeable blurring at all from what I can tell. But that doesn't seem to be quite what's happening with these commands though.
      - jacobush 6y ago
        You can also reuse previous and following frames instead of using solid color borders
      - ShamelessC 6y ago
        I believe what you're looking for is what Reddit's popular bot u/stabbot does. I was able to find this comment thread where a user posted some ffmpeg scripts to replicate the behavior. Am on mobile currently so I can't verify they do what you're looking for but here's a snippet. //PART 1 [Defaults: shakiness=5:accuracy=15:stepsize=6:mincontrast=0.3:show=0] ffmpeg -i shaky-input.mp4 -vf vidstabdetect=shakiness=5:accuracy=15:stepsize=6:mincontrast=0.3:show=2 dummy_crop.mp4 //PART 2 ffmpeg -i shaky-input.mp4 -vf scale=trunc((iw0.90)/2)2:trunc(ow/a/2)*2 scaled_crop.mp4 //PART 3 [-strict -2 ONLY IF OPUS AUDIO] - [Unsharp Default: '5:5:1.0:5:5:0.0'] ffmpeg -i scaled_crop.mp4 -vf vidstabtransform=smoothing=20:input="transforms.trf":interpol=no:zoom=-10:optzoom=2,unsharp=5:5:0.8:3:3:0.4 stabilized_crop-output.mp4 https://www.reddit.com/r/stabbot/comments/9f7ayj/comment/e5xd7md https://www.reddit.com/r/stabbot/comments/9f7ayj/comment/e5x...
pocak 6y ago
It works by applying a low-pass filter on the camera's motion, so a sudden kick turns into a slow, low amplitude bob. Perhaps you just need to increase the smoothing parameter. I found the default of 10 way too low, and needed around 50-100 for my very shaky 50 fps home videos.