CalledProcessError : return None return json. join ( ff_filters ) thumb_path = video_filename '.thumb.jpg' ffmpeg ( '-y', '-vf', ff_filterstr, '-vframes', '1', thumb_path, '-i', video_filename )Īs an alternative to the unwieldy FFmpeg expression syntax, one can take the output of ffprobe to get the width and height, and calculate the pad/crop/scale parameters in Python: import json def ffprobe ( filename ): cmd = try : result = subprocess. def make_thumb ( video_filename ): # pad with black if WH, rescale to 300x300 if greaterįf_filters = ( f. Change ‘black’ below to change the padding color and ‘300’ to change the thumbnail size. MapPath (' /video/ffmpeg.exe ') ' \' ' processInfo. ToString ').jpg ' var processInfo new ProcessStartInfo () processInfo. Next (1, 9999999) string newfilename ' /video/ ' filename ' (' rand. The code below takes care of that so that the video filter configuration stays more readable and easier to change. Name) Random random new Random () int rand random. The following command would take a screenshot at the 15-minute mark. In the Network Editor, create a ROP Geometry Output node, rename it to smokesrc, and then. For whatever reason the commas must have a backslash prepended. (Seeking on output basically means that it will process every single frame between the start of the video and the one that you want to screenshot.) Fortunately, fluent-ffmpeg allows you to use any command line parameters, by way of outputOptions. To do this, you will use the FFmpeg Encode Video TOP node. FFmpeg has a neat expression language that can be used when configuring video filters. Now we can make the lengthy call to ffmpeg. CalledProcessError : return False return True check_output ( list ( cmd )) except subprocess. The first step was to wrap the ffmpeg executable and make it callable from Python: import subprocess def ffmpeg ( * cmd ): try : subprocess. So far I’ve had a really good experience with GStreamer, but I decided to give FFmpeg a try. Creating thumbnails from a video file s - offset in seconds w - screenshot width h - screenshot height r - screenshot resolution ( widthxheight ) f. Generate video thumbnail with FFmpeg and Python Jul 11, 2016įor a project I was working on, I needed to take an uploaded video and generate a square-ish thumbnail from it.
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