Hi,
I need to reduce frame-rate from my video shoot by mobile ( variable frame-rate
about 29 fps) to 25 fps.
As you know using -r 25 just drops every 6th frame resulting in choppy (jerky)
footage.
Is there any better option how to do it more smoothly (blending etc.)?
Maintaining the same length
Hello,
I am down-scaling 4K video into 1080p, result is ok, but with different:
- color info (bt709 vs Nothing)
- tbn (90k vs 30k)
- missing creation time (Metadata: creation_time : 2014-11-02 14:18:12 vs
Empty)
Input 4K video
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661),
yuvj42
oblem in mp4
>
> Maybe try demuxing it with MP4Box, resize with FFmpeg, then remux with
> MP4Box?
> http://gpac.wp.mines-telecom.fr/downloads/gpac-nightly-builds/
>
>
> On Fri, Feb 6, 2015 at 10:37 AM, Petr Tresnak wrote:
>
> > Hi all,
> > I downscale the
Hi all,
I downscale the following 4k to 1080 using ffmpeg -i 4k.mp4 -vf scale=1920:1080
-c:v libx264 -preset fast -crf 18 -c:a copy output.mp4"
Duration: 00:00:10.56, start: 0.08, bitrate: 95904 kb/
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709),
3840x2160 [SAR
mx.net
> To: ffmpeg-user@ffmpeg.org
> Subject: Re: [FFmpeg-user] Mjpeg to h264 audio sync problem
>
> * Petr Tresnak on Friday, December 05, 2014 at 10:34:50 +
> > the sound start is cut and audio is ahead even more with your command line.
> >
> > ffmpeg -i mjpeg.av
head: 0.374799%
Press any key to continue . . .
> To: ffmpeg-user@ffmpeg.org
> From: ceho...@ag.or.at
> Date: Thu, 4 Dec 2014 08:55:54 +
> Subject: Re: [FFmpeg-user] Mjpeg to h264 audio sync problem
>
> Petr Tresnak quick.cz> writes:
>
> > sound is not synchroniz
Hello,
I am trying to convert Canon MJPEG to MP4 (h264/AAC) but after conversion, the
start of the audio is cut and sound is not synchronized.
ffmpeg -i mjpeg.avi -c:v libx264 -preset slow -crf 13 -pix_fmt yuvj420p -c:a
libfdk_aac -b:a 192k output.mp4
or
ffmpeg -async 1 -i mjpeg.avi -avoid_negat
