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Total newbie :(
I must be thick, because I just can’t get my head around ffmpeg. Here’s what I’m trying to do:
I have a folder “C:frames” that contains 58656 jpg images (1920×1080). These images are named “frame-000000.jpg” to “frame-58655.jpg”. These images are not interlaced.
I would like to be able to convert a consecutive number of these frames into both HD mpeg4 1920×1080 format and PAL mpeg2 DVD 720×576 format at high quality.
Although the images are in 16×9 format, the image is actually 4×3 with black bars to each side. When converting to 720×576 I would like to crop the side bars.
I’ve managed to create a movie with a single frame, but that’s about it. Please help.
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15 Replies
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[Thomas Monk] “When converting to 720×576 I would like to crop the side bars.”
How much from each side would you like to crop?
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210 pixels from each side.
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Sorry, I left a zero out my last frame number, should be “frame-000000.jpg” to “frame-058655.jpg”.
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Here’s a basic command to concatenate your images into a movie, based on this blog post about time-lapse movies:
ffmpeg -f image2 -r 25 -i frame-%05d.jpg -c:v libx264 output.mp4
“-r 25” is your frame rate, and “-c:v libx264” would be your codec/quality settings. Feel free to adjust those or swap in other codec/quality settings you may find around the web.You should also be able to use the crop filter (format width:height:x:y, see filtering guide here) and the “pal-dvd” target for your PAL DVD encode like this (although I haven’t tried it yet):
ffmpeg -f image2 -r 25 -i frame-%05d.jpg filter="-vf crop=1440:1080:240:0" -target pal-dvd output.mpg -
Amending my other post, which assumed 240 pixel cropping, here’s a 210 pixel crop:
ffmpeg -f image2 -r 25 -i frame-%05d.jpg <b>filter="-vf crop=1500:1080:210:0"</b> -target pal-dvd output.mpg -
Thanks for your help Jim. Do I need to specify the full path; i.e. C:\frames\frame-%05d.jpg ? And in light of my slight filename amendment; i.e. frame-000000.jpg to frame-058655.jpg do I need to put frame-%06d.jpg ?
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Sorry Jim, but this doesn’t seem to work at all. I think something has gone awry with spurious formatting such as “ “.
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Don’t copy the html “bold” tags that got placed in there for some reason.
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I’m running the following single line in a batch file (run.bat):
ffmpeg -f image2 -start_number 7723 -r 25 -i /tmp/img%05d.jpg filter=”-vf crop=1500:1080:210:0″ -target pal-dvd output.mpg
But ffmpeg keeps reporting that it cannot find the file:
/tmp/imgC:Program Filesffmpegbinrun.bat05d.jpg
For some reason % is being replaced by the path and name of my batch file.
This is driving me bonkers!
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Using ffmpeg within a bat script is quite messy. It parses text differently than a posix compliant shell does.
You will have to escape the “%” character in order to use it within a bat script. It’s been a long time since I’ve used bat files, but if I remember correctly you can escape that character by doubling it up. (“%%” in place of “%”)
You might save yourself a lot of trouble by installing a windows port of bash, and using that to write shell scripts rather than bat scripts.
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