Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 19.04.2017 23:28, Paul B Mahol wrote: On 4/19/17, Markku Tavasti <tava...@tavasti.fi> wrote: From http://scl1.tavasti.fi/~tavasti/ you can find 3 video clips for testing. Create video from them like: ffmpeg -f concat -safe 0 -i <(for i in FHD*MOV; do echo file $(pwd)/$i; done) -an -filter:v "setpts=0.003*PTS" x333.mp4 And there you have the flickering. Sure, amount of test material might be bit overscaled :-) I don't have permissions to download, get 403 error. Sorry, stupid me not checking. Now they should work. Sorry. --Tavasti ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 19.04.2017 07:04, Markku Tavasti wrote: On 18.04.2017 23:02, Paul B Mahol wrote: Alternatively you could provide me link to original fotage. I'll select relevant parts and put them to somewhere at the evening. The whole original set is 15G (video was speeded 300x). ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe". From http://scl1.tavasti.fi/~tavasti/ you can find 3 video clips for testing. Create video from them like: ffmpeg -f concat -safe 0 -i <(for i in FHD*MOV; do echo file $(pwd)/$i; done) -an -filter:v "setpts=0.003*PTS" x333.mp4 And there you have the flickering. Sure, amount of test material might be bit overscaled :-) ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 18.04.2017 23:02, Paul B Mahol wrote: Alternatively you could provide me link to original fotage. I'll select relevant parts and put them to somewhere at the evening. The whole original set is 15G (video was speeded 300x). ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 18.04.2017 22:35, Paul B Mahol wrote: On 4/18/17, Markku Tavasti <tava...@tavasti.fi> wrote: On 18.04.2017 20:06, Paul B Mahol wrote: I just wrote deflicker filter. Sounds great! Do you want some tester for it? Yes, Do you know how to apply patches and build master ffmpeg git? Haven't build ffmpeg, but if it is decently buildable software in ubuntu 16.04, that won't be a problem. --Tavasti ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 18.04.2017 20:06, Paul B Mahol wrote: I'm pretty sure that ffmpeg can't do that, as I know of no filter which will create such an average and apply it. But a filter could be written... I don't know if it would be a candidate for upstream though. I just wrote deflicker filter. Sounds great! Do you want some tester for it? --Tavasti ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 18.04.2017 14:02, Markku Tavasti wrote:
Maybe I try to create script which would get frames as pictures. And in
addition, to darkest parts of the video, there is huge noise in picture,
averaging maybe 4 frames migth give better results.
Made a script:
#!/bin/bash
interval=1
if [ $# -gt 0 ] ; then interval=$1 ; fi
echo "Using interval of $interval seconds"
mkdir -p raw
mkdir -p avg
mkdir -p frm
FRM=0
for f in FHD*; do
len=$(ffprobe -select_streams v -show_streams $f 2>/dev/null| grep
'duration=' | sed 's/.*=//i;s/\..*//')
echo $f $len $FRM
pos=0
while [ $pos -lt $len ]; do
ffmpeg -ss $pos -i $f -frames:v 4 raw/frm$(printf "%05d"
${FRM})_%d.png 2>/dev/null
convert raw/frm$(printf "%05d" ${FRM})_*.png -average
avg/frm$(printf "%05d" ${FRM}).png
mv raw/frm$(printf "%05d" ${FRM})_1.png frm
rm raw/frm$(printf "%05d" ${FRM})_*.png
FRM=$(($FRM+1))
pos=$((${pos}+${interval}))
done
done
echo deflickering avg
cd avg
timelapse-deflicker.pl 2>/dev/null
echo deflickering frm
cd ../frm
timelapse-deflicker.pl 2>/dev/null
cd ..
ffmpeg -r 25 -pattern_type glob -i 'avg/Deflickered/*.png' -c:v libx264
-pix_fmt yuv420p avg.mp4
ffmpeg -r 25 -pattern_type glob -i 'frm/Deflickered/*.png' -c:v libx264
-pix_fmt yuv420p normal.mp4
And results https://youtu.be/5u3t6hiaEPI
Looks like ok. Uses lot of time and disk, real filter to ffmpeg would be
much faster, but I am not in such mass production / my release schedule
is not tight, so this will be sufficient to me.
--Tavasti
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Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 18.04.2017 12:31, Moritz Barsnick wrote: On Tue, Apr 18, 2017 at 10:45:24 +0300, Markku Tavasti wrote: One option is to write all frames as pictures to disk, and then run timelapse-deflicker.pl for them, and make video from those pictures. However, that will take much time and disk space. Only after looking at that script[*] (and the lovely videos of course) do I understand your intent: The brightness shall follow a rolling average of sorts, i.e. be more or less monotonic (wrong term, I know). Yes, idea is that every frame would have brightness of average +-5 pictures surrounding it. timelapse-deflicker.pl reads luminance first, and then it creates modified pictures based on those values. Seems to work ok. Maybe I try to create script which would get frames as pictures. And in addition, to darkest parts of the video, there is huge noise in picture, averaging maybe 4 frames migth give better results. --Tavasti ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
Re: [FFmpeg-user] Filter for smoothening gradual luminance changes?
On 16.04.2017 15:08, Markku Tavasti wrote: towards camera, and endig to darkness. So exposure changes gradually, but problem is that on such cameras, change is annoying clear, sudden change. Therefore, I'd like to smoothen that so that it is not that sudden. See example what I mean https://youtu.be/vOVYZAcWpZE?t=23s Another example, where changes are not gradual, to one direction, and video is speeded up more, so result is flickering: https://www.youtube.com/watch?v=k1FY2HiPa2g One option is to write all frames as pictures to disk, and then run timelapse-deflicker.pl for them, and make video from those pictures. However, that will take much time and disk space. --Tavasti ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
[FFmpeg-user] Filter for smoothening gradual luminance changes?
Hi! I have tried to find out proper way to smoothen luminance changes on videos of sunset. Cameras are action cameras where it is not possible to set manually exposure etc, and in fact, it is not desirable. Typically my video recordings are few hours, from full daylight, sun shingin towards camera, and endig to darkness. So exposure changes gradually, but problem is that on such cameras, change is annoying clear, sudden change. Therefore, I'd like to smoothen that so that it is not that sudden. See example what I mean https://youtu.be/vOVYZAcWpZE?t=23s Video is shot as normal video, and then speeded up with ffmpeg. If video would be done from pictures, then it is possible to change luminance of each picture to match to average of surrounding pictures, but cameras I use don't support taking pictures with given interval or provided intervals are too long. Therefore making 'timelapse' from video is needed. Any suggestions? --Tavasti ___ ffmpeg-user mailing list ffmpeg-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-user To unsubscribe, visit link above, or email ffmpeg-user-requ...@ffmpeg.org with subject "unsubscribe".
