Movie clip compositor - Distort = no sound and crop

Support Compositing and Post Processing
1

Hi all,

In the compositor I “input” a movie clip (with sound), apply a “distort”, connect to “composite” and “viewer” (see picture). I have 2 questions:


  1. No sound
    When I animate the movie with “output” to H.264 and ACC sound, the video generated has no actual sound. A media infos check said it has a sound track, but there is no sound.
    Is that a normal behavior when a video is generated like that or am I doing something wrong, like a node missing ?

  2. Crop
    Distortion to correct fisheye effect is of course croping the image. As by default I set the resolution to the original size, it creates the expected loss in quality.
    Is there a way to measure how much has been croped so I set the render resolution to a proper size to avoid quality loss ?

Thanks

2

compositor doesnt deal with sound at all. if you need it add it back in through the sequencer or afterwards with ffmpeg

No there is no inbuilt way of measuring the quality loss… but what you can do is increase the render size until you see black around the edges… this will give you a full natural fit of the image, you can then scale down & crop from there

3

Hello,

Thanks for the quick answer.

On the 2nde question, the point is not so much to measure the quality loss but to estimate how much the “distort” effect has removed from the original picture (the door on the left side has been removed for instance). The 2 pictures below show before and after. The idea was, I render resized with
target size = orginal size - what has disappeared from the original picture.
[ATTACH=CONFIG]307244[/ATTACH] [ATTACH=CONFIG]307245[/ATTACH]

But in fact, that’s probably stupid, as the orginal picture is anyway modified in some area. Like if some part with the distort correction have been magnified (ie the person in green on the right side).

I will continue to play with rendering and with your suggestion to figure the best options.