Example for once per second from a live streaming input: ffmpeg -i rtmp://input.foo -q:v 4 -r 1 -update 1 output. To continuously overwrite/update/save to a single image To output a single image at ~60 seconds duration: ffmpeg -ss 60 -i input.mp4 -qscale:v 4 -frames:v 1 output.jpg See the image muxer documentation for more options involving image outputs.

To output a series of images: ffmpeg -i input.mp4 -qscale:v 2 output_%03d.jpg mp4, which has the highest resolution among all the xedsvg. You can use a value of 1 but you must add the -qmin 1 output option (because the default is -qmin 2). I am trying to use ffprobe to check if there are missing frames in my video.The scale is linear with double the qscale being roughly half the bitrate.Normal range for JPEG is 2-31 with 31 being the worst quality.Use -qscale:v (or the alias -q:v) as an output option. The -vsync 0 parameter avoids needing to specify the frame rate with -r and means all frames in the input file are treated as, um, a frame. If you want to extract only the key frames (which are likely to be of higher quality post-edit) you can use something like this: ffmpeg -skip_frame nokey -i my-film.mp4 -vsync 0 -f image2 stills/my-film-%06d.png It is possible to obtain slightly sharper images in JPEG format this way than is possible with -qmin 1 -q:v 1 and outputting as JPEG directly from ffmpeg. GIMP) to convert the PNGs you want to JPEG. Then use another program (where you can more precisely specify quality, subsampling and DCT method – e.g. Output the images in a lossless format such as PNG: mkdir stillsįfmpeg -i my-film.mp4 -vsync 0 -f image2 stills/my-film-%06d.png

Ffmpeg extract frames high quality