mp4parser | Android App to Append Mp4 Videos | Video Utils library

I have been compressing Images without any problems. Recently my app required video compress functionality to be added. Again, Silicompressor does the job but for some reason there is no audio in output file.

I am using code inside Runnable

I am building a desktop application. I am using ProGuard with the following config:

I want to merge multiple videos sequentially and get one video with mp4parser but can't start using it... I added in file gradle - implementation 'org.mp4parser:isoparser:1.9.27' and following the example, it is impossible to find

Movie()

then I realize that I need to add the plugin aspectj-rt.jar, but can't find up-to-date information on it

please help me with this problem. I see in the network that various developers successfully use this library to work with video files. But nowhere is there information on how to get started with mp4parser.

I have developed an Android app, using Moshi as one of its dependencies.

Today I want to enable minify for this project. So I set minifyEnabled true in my build.gradle.

After that, I found that all responses from server become null.

First of all, I am using Retrofit2 to call APIs. The JSON body in Response.body() is not null and have correct values.

The response body is as below (simplified):

{"status":"success","data":{"user": "I am a user"}}

And I am using the code below to convert it to my own object:

val someResponse = Moshi.Builder().add(KotlinJsonAdapterFactory()).build().adapter(SomeResponse::class.java).fromJson(theJsonString)

While the code for SomeResponse:

I am trying to merge two videos(mp4 files), one with audio and one without audio, to a single video using MP4Parser. The final video that gets generated always has the audio from start. e.g. 1st video is of 20 sec length and has no audio. 2nd video is of 10 sec length and has audio. The final video generated is of 30 secs length but the audio will be played at the starting of the video for 10 secs (rest 20 secs won't have any audio), whereas it should have starting 20 seconds without audio and end 10 secs with audio.

Our android project works fine after porting to androidx a while ago.

Now I tried upgrading the androidx.preference.preference from 1.0.0 to 1.1.0 - that is the only change I do - and I get these missing resources errors:

I am getting this error when I am trying to add new libraries to my project and then run my app:

Program type already present: Program type already present: androidx.recyclerview.widget.AdapterHelper$Callback

Following are the libraries I am trying to add

Framerate can be calculated as

FPS = framescale / timescale

Timescale is easy to obtain using isoFile.getMovieBox().getMovieHeaderBox().getTimescale()

But I cannot figure out where is the framescale stored within the mp4parser isobox structure.

Some sample code I came across here uses low-level buffer read on the following path: /moov/trak/mdhd, but that doesn't seem to be accessible using mp4parser.

Question: Is it possible to extract framescale and/or framerate using mp4parser? Or is it better to use ffmpeg instead?

Note: I prefer using native libraries such as mp4parser over external executables (ffmpeg) where possible

When I build the android project, it show "Duplicate class" exception,