gallery_saver | Flutter plugin that saves images | Plugin library

I try to create a video with ffmpeg and save it to the device with gallery_saver package for Flutter.

The ffmpeg command works well and the video is created. But GallerySaver does not save it. As result I get no error, but a false boolean for the success argument.

This is the ffmpeg output. Is this a valid video mp4 file?

I´m using ffmpeg with flutter and I create a video from a lot of images. The problem: ffmpeg seems to not create a video with a right codec or something else.... please check my description below for concrete informations.

First the code parts:

Creating video from images

-r $settings_fps -i $tempPath/img%04d.jpg -vcodec libx264 -y -an -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2" -shortest $tempPath/$videoFileName.mp4

Adding audio to the created video

-i ${finalSong.path} -i $videoPath -c:a aac -shortest $tempPath/$newVideoFileName.mp4

This is my video output from console on creating this video:

Hello fellow coders I come here again with a problem. So I in my app the user completes a form then he has to take a picture this picture is saved in the phone using the gallery_saver and this works fine but I have to add a preview in my app of the picture which the user has took and I tried with one FlatButton which has a default image and this button when is clicked it will open the camera and after the user will make the photo and now comes my problem I want that after the user takes the picture the FlatButton image will update with the picture which the user has took (here is one website that has something that I want to make, sorry that the website is not in english, when you open the website you have a tab next to "FILTRE" tab named "SEMNALEAZA PROBLEMA" click on this tab and then you will have 3 buttons with a camera icon on them.I want to do something like that when the user clicks on the icon it will take the picture and then the icon will update in the picture that the user has took).

I made a preview with some images:

The user will click on that button an then after uploads/take a picture it will be like in the next image

In java is pretty simple because we have iDs but in flutter I didn't notice something like this

This is how I take a picture:

It might be silly question but i want to save image url from carousel to another String pathImage to save it on gallery. when i swipe to next image in carousel i want to update imagePath to that swiped image url in carousel. i am using carousel_pro and gallery_saver packages. This is code:

I am aware that there already exists a solution to a very similar question, which can be found on the following link: Flutter/Dart: Find two video segments and merge them into a single valid video file? However, being relatively new to Flutter (and programming in general) I cannot seem to replicate the desired result.

My app is very simple and currently looks like this:

I click on the button "Record Video" to record two videos, which are both successfully stored into the device's gallery. Using the Flutter image_picker and gallery_saver packages and the following piece of code: