https://github.com/neurospeech/xamarin-android-ffmpeg

Xamarin Android FFMpeg binding
https://github.com/neurospeech/xamarin-android-ffmpeg

ffmpeg xamarin xamarin-android

Last synced: about 2 months ago
JSON representation

Xamarin Android FFMpeg binding

• Host: GitHub
• URL: https://github.com/neurospeech/xamarin-android-ffmpeg
• Owner: neurospeech
• License: mit
• Created: 2016-04-11T08:20:19.000Z (over 8 years ago)
• Default Branch: master
• Last Pushed: 2019-12-20T13:31:42.000Z (about 5 years ago)
• Last Synced: 2024-10-10T18:16:08.456Z (2 months ago)
• Topics: ffmpeg, xamarin, xamarin-android
• Language: PowerShell
• Size: 51.3 MB
• Stars: 30
• Watchers: 4
• Forks: 6
• Open Issues: 9
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

        
# xamarin-android-ffmpeg

Xamarin Android FFMpeg binding

# For Android 6.0 onwards, use Xamarin.Android.MP4Transcoder

Android 6.0 onwards, `text relocations` are strictly prohibited, many source files used in `ffmpeg` use `text relocations` so `ffmpeg` will never run on future android builds unless they rewrite large library and replace them with alternative of `text relocations`. For this, only alternative is to use Android's native Mp4 transcoder.

MP4Transcoder internally uses https://github.com/ypresto/android-transcoder , please read license before using Xamarin.Android.MP4Transcoder

        Install-Package Xamarin.Android.MP4Transcoder

             if (Android.OS.Build.VERSION.SdkInt >= BuildVersionCodes.Kitkat) {

                await Xamarin.MP4Transcoder.Transcoder.For720pFormat().ConvertAsync(inputFile, ouputFile, f => {

                    onProgress?.Invoke((int)(f * (double)100), 100);

                });

                return ouputFile;

            }

# Big Thanks

https://github.com/WritingMinds/ffmpeg-android-java

# Licensing

This code is licensed under MIT, however, you must use this library by accepting and following licensing terms mentioned in the source project at https://github.com/WritingMinds/ffmpeg-android-java

# Nuget Package

You can download Xamarin.Android.FFmpeg package from Nuget Package manager or run following command in Nuget Package Console.

        Install-Package Xamarin.Android.FFmpeg

# Usage

        public class VideoConverter 

        {

            public VideoConverter()

            {

            }

		/**

		* This method must be called from UI thread.

		***/

            public Task ConvertFileAsync(Context context,

                File inputFile, 

                Action logger = null, 

                Action onProgress = null)

            {

                File ouputFile = new File(inputFile.CanonicalPath + ".mpg");

                ouputFile.DeleteOnExit();

                List cmd = new List();

                cmd.Add("-y");

                cmd.Add("-i");

                cmd.Add(inputFile.CanonicalPath);

                MediaMetadataRetriever m = new MediaMetadataRetriever();

                m.SetDataSource(inputFile.CanonicalPath);

                string rotate = m.ExtractMetadata(Android.Media.MetadataKey.VideoRotation);

                int r = 0;

                if (!string.IsNullOrWhiteSpace(rotate)) {

                    r = int.Parse(rotate);

                }

                cmd.Add("-b:v");

                cmd.Add("1M");

                cmd.Add("-b:a");

                cmd.Add("128k");

                switch (r)

                {

                    case 270:

                        cmd.Add("-vf scale=-1:480,transpose=cclock");

                        break;

                    case 180:

                        cmd.Add("-vf scale=-1:480,transpose=cclock,transpose=cclock");

                        break;

                    case 90:

                        cmd.Add("-vf scale=480:-1,transpose=clock");

                        break;

                    case 0:

                        cmd.Add("-vf scale=-1:480");

                        break;

                    default:

                        break;

                }

                cmd.Add("-f");

                cmd.Add("mpeg");

                cmd.Add(ouputFile.CanonicalPath);

                string cmdParams = string.Join(" ", cmd);

                int total = 0;

                int current = 0;

		await FFMpeg.Xamarin.FFMpegLibrary.Run(

			context,

			cmdParams 

			, (s) => {

				logger?.Invoke(s);

				int n = Extract(s, "Duration:", ",");

				if (n != -1) {

					total = n;

				}

				n = Extract(s, "time=", " bitrate=");

				if (n != -1) {

					current = n;

					onProgress?.Invoke(current, total);

				}

			});

                return ouputFile;

            }

            int Extract(String text, String start, String end)

            {

                int i = text.IndexOf(start);

                if (i != -1)

                {

                    text = text.Substring(i + start.Length);

                    i = text.IndexOf(end);

                    if (i != -1)

                    {

                        text = text.Substring(0, i);

                        return parseTime(text);

                    }

                }

                return -1;

            }

            public static int parseTime(String time)

            {

                time = time.Trim();

                String[] tokens = time.Split(':');

                int hours = int.Parse(tokens[0]);

                int minutes = int.Parse(tokens[1]);

                float seconds = float.Parse(tokens[2]);

                int s = (int)seconds * 100;

                return hours * 360000 + minutes * 60100 + s;

            }

        }