Re: [FFmpeg-user] Scaling a video with multiple different resolutions

[Jesse Liu]

of course, if you want to output a 852x480 video, you can do it by:  ffmpeg  -i 
video.webm -filter_complex 
“[0:v]split=2[out1][out2];[out1]trim=start=starttiem1:end=endtime1,scale=w='if(gt(a,1.775),852,trunc(480*a/2)*2)':h='if(lt(a,1.775),480,trunc(852/a/2)*2),pad=w=852:h=480:x='if(gt(a,1.775),0,(852-iw)/2)':y='if(lt(a,1.775),0,(480-ih)/2)':color=black[trim0];[out2]trim=start=starttiem2:end=endtime2,scale=w='if(gt(a,1.775),852,trunc(480*a/2)*2)':h='if(lt(a,1.775),480,trunc(852/a/2)*2),pad=w=852:h=480:x='if(gt(a,1.775),0,(852-iw)/2)':y='if(lt(a,1.775),0,(480-ih)/2)':color=black[trim1];[trim0][trim1]concat=n=1:v=1:unsafe=1:a=0[v]”
 -map [v] -map [0:a] -c:v libx264 -c:a aac out.mp4. 1.775 in the command is 
equal to 852/480

> On 13 Jan 2017, at 8:10 AM, Alex Speller  wrote:
> 
> I have a webm file that has multiple different resolutions in it (it's a
> screen capture of a window that changes dimensions).
> 
> https://www.dropbox.com/s/ptueirabmmht0fr/4be7fdb7-d7e9-41b4-ba26-e20a3eeb6026.webm?dl=0
> 
> Is there any way to "normalize" the dimensions and output a video of a
> constant resolution, having e.g. black borders around the video when the
> resolutions change
> 
> If you play the video on the dropbox page above, in chrome or firefox, how
> that looks is what I'd like to output. Tried messing around with scale,
> setsar and setdar parameters but I can't figure out how to get output
> that's not just distorted
> 
> Any help appreciated, thanks!
> ___
> 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 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] Scaling a video with multiple different resolutions

[Alex Speller]

I have a webm file that has multiple different resolutions in it (it's a
screen capture of a window that changes dimensions).

https://www.dropbox.com/s/ptueirabmmht0fr/4be7fdb7-d7e9-41b4-ba26-e20a3eeb6026.webm?dl=0

Is there any way to "normalize" the dimensions and output a video of a
constant resolution, having e.g. black borders around the video when the
resolutions change

If you play the video on the dropbox page above, in chrome or firefox, how
that looks is what I'd like to output. Tried messing around with scale,
setsar and setdar parameters but I can't figure out how to get output
that's not just distorted

Any help appreciated, thanks!
___
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".