Example: 5) Find video area surrounded by black borders ffmpeg -i file.mp4 -vf cropdetect,metadatamodeprint -f null - A human eye give a better result quicker to detect the border. This dilemma is intrinsic to ffmpeg, and ffmpeg-python tries to stay out of. If you need to crop from the bottom, or if you shoot in a different frame size, the settings will be different. How to crop the black areas The standard procedure to eliminate these black areas is to run first the cropdetect filter 4) and then run the crop filter. I believe this one crops from the top (most of my sequences had a lot of sky in them), and I was shooing in 5MP mode. You could also use -vf trim70:75, but this doesnt re-set the time stamp, so viewers will just see a black screen for the first 70 seconds. This works if the movie has an aspect ratio of 16:9. After that right click again, but this time select video > aspect > 4:3. While the movie is playing, simply right click on the screen and select video > crop > 16:9. I will leave adjusting the crop filter further as an exercise to the reader. VLC VLC media player can be used crop black borders and bars without re-encoding the video. # 30fps image sequence 1080p mp4 video colorspace use x264 mp4 rate factor crop filter output fileįfmpeg -r 30 -i gopro_%04d.JPG -s hd1080 -f mp4 -pix_fmt yuv420p -vcodec libx264 -crf 25 -vf crop=in_w:in_h-480:0:0 out.mp4 # TODO: Group each sequence of time lapse images into their own directory You can use ffmpeg to try to automatically detect. 1080p mp4 video colorspace use x264 mp4 rate factor crop filter output file ffmpeg -r 30 -i gopro04d. # $1 - where to move images from (SD card) This section of the tutorial describes how to crop videos with ffmpeg. Recently I purchased a used GoPro Hero 3 Black. I am by no means an expert in Bash, so there is plenty of room for improvement in these scripts, such as auto-grouping time lapse sequences, and changing the cropping settings. I did not write a script for this, but it should be fairly trivial to do so. With the help of Google, I was able to piece together some scripts to help me convert these to mp4 videos on my MacBook.Īssuming the images have been offloaded from the GoPro’s SD card, group each series of time lapse images into a separate directly. The GoPro records images in 4×3 aspect ratio, and makes quite large images (2MB+ per frame). But your 576p example does not make any sense. I’ve used it mainly to take time lapse pictures. Recently I purchased a used GoPro Hero 3 Black.
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