[FFmpeg-user] 3 points jpeg to timelapse issue

jb jul.blon at gmail.com
Wed Dec 11 15:31:53 CET 2013

Hi again
Where I could really use some expertise is with the processing of multiple folders, since ffmpeg FAQ and google aren't helping.
My camera stores FILE0001.JPG to FILE0999.JPG in folder 101MEDIA, than resets filename and fills 102MEDIA, etc.
Can someone please point out the BASH way to symlink all files (300'000 and counting) as a single sequence in a single directory, or a way to pass all to ffmpeg according to capture time/creation date, or any command, for that matter, that would allow me to get a single output file out of this mess?
Thanks a lot for any help.

On Dec 9, 2013, at 3:32 PM, jb <jul.blon at gmail.com> wrote:

> Hi
> Having a few issues converting a jpeg sequence to adequate video. Any form of guidance appreciated.
> Frontmost problem is the great loss in quality/depth (huge visible contrast increase) that occurs when applying :
> 	ffmpeg -f image2 -r 12 -i FILE%04d.JPG -r 12 -s 864x648 -vcodec libx264 output.mp4	(original files are ~1.1MB, 2592 x 1944 jpegs)
> also tried
> 	ffmpeg -f image2 -r 12 -i FILE%04d.JPG -r 12 -vcodec copy output.mp4 [with previously scaled jpegs – which isn't practical at all for me…]
> with same problem.
> I'm on mac os 10.8.5. A Quicktime conversion (H.264 multi-pass) gives a satisfying output, no significant contrast/range/depth loss, just blurr. Yet Qt isn't practical for me
> I'm sure this is documented somewhere, so forgive me for not digging further, but I can't seem to get a 2-pass with ffmpeg to work in this case.
> 	ffmpeg -f image2 -r 12 -i FILE%04d.JPG -pass [[1/2]] -r 12 -s 864x648 -vcodec libx264 output.mp4	???
> What would the correct syntax be?
> And could a 2 pass run solve my quality issue? or have I got it wrong from the start?
> Secondly, once I get the settings right, I need to process the content of multiple folders in the form 101MEDIA, 102MEDIA, etc.
> Any way to tell ffmpeg to do this all at once, (190GB of data, and counting…), the output being 'one' big MP4 file?
> Thanks for reading and any hints.
> Regards,
> J

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