MediaCodec | use MediaCodec to encode/decode and pass samples

I had to release the player when the recycler view item are recycled

I find the answer from this question here

I figured it out. In my case, this exception is caused by the crash of the system tv application, which owns the Surface object. The codec goes into the Error state when the Surface becomes invalid and at the same moment the ExoPlayer tries to work with the codec's buffers, not knowing that the codec has changed the Executing state to Error.

And the reason for the crash of the system tv app was the following exception:

It can be a bug of that Flutter package, indeed. Have you tried to create an issue in GitHub of that package?

Secondly, during my development, I see several times when emulators just fail and real devices always work. The solution I used is - simply to do not test them on simulators. Real users never use simulators, aren't they?

It can be a bug of the library when running on x86 arch (the arch simulators use). Then, nobody with a real device (arm arch) will ever see the bug.

Thirdly, what about trying to use "cloud real devices" to test whether they work on real Pixel devices that you are worried about. There are many platforms that host some real devices and you can connect to them via a webpage and test your app.

no answer but some inputs that may help:

1. I believe the media extractor and media muxer are vendor owned, google have the default cpp implementation but the vendors can override it. you can review the google implementation here: https://cs.android.com/android/platform/superproject/+/master:frameworks/av/media/libstagefright/MediaMuxer.cpp;l=173

   It helps me to solve one of the voodoo bugs in the engine related to "last frame" / time mismatch. NOTE: you need to make sure you are looking o n the right version (check the blame tool to the right).

2. the media can contain any metadata value that was pushed while creating the file. so, you can calculate it again or just use what you get.

3. did you tried to take the video that you created and then run the test when this file is the input?

I got solution so I answered here, issue is not of flutter_ffmpeg, issue is caused because app had not permission to write in external storage to resolve this add "MANAGE_EXTERNAL_STORAGE" in mainfest.xml file and set output path is File('storage/emulated/0/my_folder/o.mp4').path , and everything works fine.

For those who are struggling with MediaCodec exception while recording video. Have a look at CameraX video. For me it solved issue. Hope it will be helpful to someone.

I've notices a couple of problems on your code.

First, you shouldn't compute presentation time by yourself since if the video has B frames, the presentation time of frames might not always come in increasing order. Causing the frame timestamps seems to come out of order.

https://ottverse.com/i-p-b-frames-idr-keyframes-differences-usecases/

Second, you shouldn't drop the frame based on the time you passed it into the decoder. Decoder some time needs multiple frame to be passed before outputting a new frame, so it may take some times for the decoder to decode a particular frame. Rather you should calculate it based on the first frame rendered.

Combine answers from How do I convert a video to GIF using ffmpeg, with reasonable quality? and Resizing videos with ffmpeg to fit into specific size.

You can't make your surfaceView bigger than the screen. Although there are multiple ways to do this in different manner but directly you can't reuse surfaceview to encode after display to screen.