Use
ffmpeg -i "%1" frames/out-%03d.jpg
A sequence of image files don't have a framerate. If you want to undersample the video file, use -r before the input.
Edit:
ffmpeg -i "C:\Applications\FFMPEG\aa.mp4" "frames/out-%03d.jpg"
Use
ffmpeg -i "%1" frames/out-%03d.jpg
A sequence of image files don't have a framerate. If you want to undersample the video file, use -r before the input.
Edit:
ffmpeg -i "C:\Applications\FFMPEG\aa.mp4" "frames/out-%03d.jpg"
Try:
ffmpeg -i file.mpg -r 1/1 $filename%03d.bmp
or
ffmpeg\ffmpeg -i file.mpg test\thumb%04d.jpg -hide_banner
Note:
- to change framerate before
-i, enter-framerate. To specify framerate for output after-ienter-r -filter:v -fps=fps=...or-vf fps=...is more accurate than-r
eg.
ffmpeg -i myvideo.avi -vf fps=<NO. of images>/<per no. of seconds> img%0<padding No. of digits>d.jpg
video - Fastest way to extract frames using ffmpeg? - Stack Overflow
ffmpeg - Extracting frames from MP4/FLV? - Stack Overflow
How to extract frames from a video using ffmpeg? - Video Production Stack Exchange
Extract specific video frames - Video Production Stack Exchange
How do I extract frames from a specific time range?
ffmpeg -ss 00:01:00 -i input.mp4 -t 10 -vf "fps=1" range_%03d.jpg
This extracts one frame per second from the 1:00 to 1:10 mark.
Can I extract frames as PNG instead of JPEG?
ffmpeg -ss 5 -i input.mp4 -frames:v 1 frame.png
Is JPEG or PNG better for extracted frames?
If the JPEG encoding step is too performance intensive, you could always store the frames uncompressed as BMP images:
ffmpeg -i file.mpg -r 1/1 $filename%03d.bmp
This also has the advantage of not incurring more quality loss through quantization by transcoding to JPEG. (PNG is also lossless but tends to take much longer than JPEG to encode.)
Came across this question, so here's a quick comparison. Compare these two different ways to extract one frame per minute from a video 38m07s long:
time ffmpeg -i input.mp4 -filter:v fps=fps=1/60 ffmpeg_%0d.bmp
1m36.029s
This takes long because ffmpeg parses the entire video file to get the desired frames.
time for i in {0..39} ; do ffmpeg -accurate_seek -ss `echo $i*60.0 | bc` -i input.mp4 -frames:v 1 period_down_$i.bmp ; done
0m4.689s
This is about 20 times faster. We use fast seeking to go to the desired time index and extract a frame, then call ffmpeg several times for every time index. Note that -accurate_seek is the default
, and make sure you add -ss before the input video -i option.
Note that it's better to use -filter:v -fps=fps=... instead of -r as the latter may be inaccurate. Although the ticket is marked as fixed, I still did experience some issues, so better play it safe.
The command
ffmpeg -ss 00:00:25 -t 00:00:00.04 -i YOURMOVIE.MP4 -r 25.0 YOURIMAGE%4d.jpg
will extract frames
- beginning at second 25 [-ss 00:00:25]
- stopping after 0.04 second [-t 00:00:00.04]
- reading from input file YOURMOVIE.MP4
- using only 25.0 frames per second, i. e. one frame every 1/25 seconds [-r 25.0]
- as JPEG images with the names YOURIMAGE%04d.jpg, where %4d is a 4-digit autoincrement number with leading zeros
Check you movie for the framerate before applying option [-r], same applicable for [-t], unless you want to extract the frames with the custom rate.
Never tried this with the cropped (corrupted?) input file though. Worth to try.
This could be VERY difficult. The MP4 file format includes an 'moov' atom which has pointers to the audio and video 'samples'. If the fragment of the mp4 file you have does not have the moov atom, your job would be much more complicated. You'd have to develop logic to examine the 'mdat' atom (which contains all the audio and video samples) and use educated guesses to find the audio and video boundaries.
Even worse, without the moov atom, you won't have the SPS and PPS needed to decode the slices. You'd have to synthesize replacements; if you know the codec used to create the MP4, then you might be able to copy the SPS and PPS from a similarly encoded file; if not, it could be a painful process of trial and error, because the syntax of the slices (the H.264 encoded pictures) is dependent upon values specified in the SPS and PPS.
To extract frame # x through y, use
ffmpeg -i in.mp4 -vf select='between(n\,x\,y)' -vsync 0 frames%d.png
You can also use:
ffmpeg -ss XXX -i input.mp4 -vframes 1 output.png
where XXX is the time in seconds. If you know which exactly frame you want to extract you can calculate the XXX by multiplying the number of the wanted frame * frame duration which is 1/fps.
Please also note that since H.264 is using I, P and B frames it would be best if you first decode your video to some intra-frame codec or raw. You can easily do that by:
ffmpeg -i input.mp4 -vsync 0 output.y4m
And then you can extract the desired frame. But y4m is a format with no compression which means that the output file will be huge. You can also use ffv1 to do that since it is lossless codec, but make sure you use -g 1 option, since you need only I-frames at the output.
Use the select filter:
ffmpeg -i <input> -vf "select=eq(n\,34)" -vframes 1 out.png
counting starts at 0, so 35th = n value of 34.
It should be noted that the select filter will decode the video up to the selected frame, so this can be quite slow if you are trying to fetch a frame one hour into a video.
Two quick-and-dirty ways:
Use the FFmpeg executable with the seek option. You'll need to convert to a time first, e.g. if I want frame 150 and my video is 29.97 FPS the command will be ffmpeg -ss 00:00:05.01 -i myvideo.avi -frames:v 1 myimage.jpg. This might be slightly inaccurate. To seek by exact frame you'd need to use the FFmpeg library with C++.
Another 'hacky' way is using VLC media player. Check menu View -> Advanced controls. Pause video and click the Frame-by-frame button 34 times.
» npm install ffmpeg-extract-frames