Am 25.01.2021 um 23:45 schrieb Mark Filipak (ffmpeg):
> regarding PTS variations, I've often found that simply remuxing an
> existing stream via MKVToolNix has fixed the time stamps so that all
> players play videos correctly.
I tried that and can confirm that MKVToolNix does solve some issues
On 01/25/2021 06:09 AM, Wolfgang Hugemann wrote:
Express duration in seconds
Repeat the last image as per
https://trac.ffmpeg.org/wiki/Slideshow#Concatdemuxer
Thanks for this hint. This really works and -vsync vfr seems to be
necessary for mp4. (For mkv it works without that.)
It works as
Am Mo., 25. Jan. 2021 um 12:10 Uhr schrieb Wolfgang Hugemann :
> I now successfully produced a vfr mp4 with ffmpeg.
The author of the relevant code - Baptiste - claims that such
files are not valid / do not conform to any specification.
Carl Eugen
___
> Express duration in seconds
> Repeat the last image as per
> https://trac.ffmpeg.org/wiki/Slideshow#Concatdemuxer
Thanks for this hint. This really works and -vsync vfr seems to be
necessary for mp4. (For mkv it works without that.)
It works as well if you provide the durations in
Wolfgang Hugemann wrote
> I did one step backward and tried to construct a vfr video from the
> scratch using slides a an input:
>
> ffmpeg -y -f concat -i input.txt colors.mkv
>
> with input.txt as:
>
> ffconcat version 1.0
> file 'red.png'
> duration 250ms
> file 'yellow.png'
> duration 500ms
Am So., 24. Jan. 2021 um 18:23 Uhr schrieb Wolfgang Hugemann :
>
> I did one step backward and tried to construct a vfr video from the
> scratch using slides a an input:
>
> ffmpeg -y -f concat -i input.txt colors.mkv
>
> with input.txt as:
>
> ffconcat version 1.0
> file 'red.png'
> duration
I did one step backward and tried to construct a vfr video from the
scratch using slides a an input:
ffmpeg -y -f concat -i input.txt colors.mkv
with input.txt as:
ffconcat version 1.0
file 'red.png'
duration 250ms
file 'yellow.png'
duration 500ms
file 'green.png'
duration 500ms
file 'cyan.png'
