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• Trouble using ffmpeg in c# how to correctly format string to upscale videos ?

  30 décembre 2020, par user14527374

  So I am writing an app in c# to upscale videos to a certain resolution. It uses ffmpeg to do this. What happens is after selecting the video file, and clicking 1080p it creates the directory folder but does not actually write the upscaled video to it.

  


  I think I must have a string format issue :

  


  private void HD_Click(object sender, EventArgs e)
        {
            if (textBox1.Text == null)
            {
                MessageBox.Show("You've not selected your video file yet. Please do so before continuing, cheers.");

            }
            else
            {
             
                    var originFilePath = textBox1.Text;
                    string name = Path.GetFileName(originFilePath);
                    byte[] bytes = null;
                    using (FileStream fileStream = new FileStream(originFilePath, FileMode.Open, FileAccess.Read))
                    {
                        using (MemoryStream ms = new MemoryStream())
                        {
                            fileStream.CopyTo(ms);
                            bytes = ms.ToArray();
                        }

                        var localStoragePath = Path.Combine(Path.GetTempPath(), name);
                        var directoryPath = Path.GetDirectoryName(localStoragePath);
                        Directory.CreateDirectory(directoryPath);
                        File.WriteAllBytes(localStoragePath, bytes);
                        Console.WriteLine($"File copy successful: {File.Exists(localStoragePath)}");
                        var readBack = File.ReadAllBytes(localStoragePath);
                        Console.WriteLine($"Read file Back: {readBack.Length}, {localStoragePath}");
                    var resizedFolderPath = @"C:\upscaledvideohere";
                        Directory.CreateDirectory(resizedFolderPath);
                        var resizedFiePath = Path.Combine(resizedFolderPath, Path.GetFileName(localStoragePath));

                        var psi = new ProcessStartInfo();
                        psi.FileName = @"C:\ffmpeg-2020-12-27-git-bff6fbead8-full_build\binffmpeg.exe";
                        psi.Arguments = $"-i \"{localStoragePath}\" -vf scale=1080 \"{resizedFiePath}\"";
                        psi.RedirectStandardOutput = false;
                        psi.RedirectStandardError = false;
                        psi.UseShellExecute = true;
                        Console.WriteLine($"Args: {psi.Arguments}");

                        try
                        {
                            using (Process exeProcess = Process.Start(psi))
                            {
                                Console.WriteLine($"process started with processId: {exeProcess.Id}");
                                exeProcess.WaitForExit();
                                Console.WriteLine($"Exit Code: {exeProcess.ExitCode}");
                            }
                        }
                        catch (Exception ex)
                        {
                            Console.WriteLine(ex.StackTrace.ToString());
                            Console.WriteLine(ex.Message.ToString());
                            return;
                        }
                        Console.WriteLine($"process completed");
                        Console.WriteLine($"Temp Out Exists: {File.Exists(resizedFiePath)}");
                    }

                    Console.ReadLine();
                }
            }
        
    


  


  I am wondering where the string format error could be ? Thank you.

  


• ffmpeg/ffprobe get HLS 'codecs' string for a video/audio stream

  19 décembre 2020, par Richard

  I'm using ffmpeg to create HLS sub-playlists. I used ffmpeg to create them for the renditions. Now I need to create the master playlist .m3u8.

  


  I need to do this manually, for a few reasons. I have everything I need except the 'CODECS' value.

  


  How can I get this CODECS value for the video and audio streams within my file ?

  


  I cannot see the relevant data when I use ffprobe to get all the metadata about the streams.

  


  Example master manifest with CODECS :

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=540863,RESOLUTION=640x360,CODECS="avc1.64001e,mp4a.40.2"
v0/prog_index.m3u8

#EXT-X-STREAM-INF:BANDWIDTH=2339363,RESOLUTION=960x540,CODECS="avc1.64001f,mp4a.40.2"
v1/prog_index.m3u8


  


  Example of metadata I could get using ffprobe :

  


  {'avg_frame_rate': '24000/1001',
 'bit_rate': '35956',
 'bits_per_raw_sample': '8',
 'chroma_location': 'left',
 'closed_captions': 0,
 'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
 'codec_name': 'h264',
 'codec_tag': '0x31637661',
 'codec_tag_string': 'avc1',
 'codec_time_base': '1001/48000',
 'codec_type': 'video',
 'coded_height': 368,
 'coded_width': 640,
 'display_aspect_ratio': '16:9',
 'disposition': {'attached_pic': 0,
                 'clean_effects': 0,
                 'comment': 0,
                 'default': 1,
                 'dub': 0,
                 'forced': 0,
                 'hearing_impaired': 0,
                 'karaoke': 0,
                 'lyrics': 0,
                 'original': 0,
                 'timed_thumbnails': 0,
                 'visual_impaired': 0},
 'duration': '5.005000',
 'duration_ts': 120120,
 'has_b_frames': 2,
 'height': 360,
 'index': 0,
 'is_avc': 'true',
 'level': 30,
 'nal_length_size': '4',
 'nb_frames': '120',
 'pix_fmt': 'yuv420p',
 'profile': 'High',
 'r_frame_rate': '24000/1001',
 'refs': 1,
 'sample_aspect_ratio': '1:1',
 'start_pts': 0,
 'start_time': '0.000000',
 'tags': {'handler_name': 'VideoHandler',
          'language': 'eng',
          'timecode': '01:00:00:00'},
 'time_base': '1/24000',
 'width': 640}


  


  {'avg_frame_rate': '0/0',
 'bit_rate': '138375',
 'bits_per_sample': 0,
 'channel_layout': 'stereo',
 'channels': 2,
 'codec_long_name': 'AAC (Advanced Audio Coding)',
 'codec_name': 'aac',
 'codec_tag': '0x6134706d',
 'codec_tag_string': 'mp4a',
 'codec_time_base': '1/48000',
 'codec_type': 'audio',
 'disposition': {'attached_pic': 0,
                 'clean_effects': 0,
                 'comment': 0,
                 'default': 1,
                 'dub': 0,
                 'forced': 0,
                 'hearing_impaired': 0,
                 'karaoke': 0,
                 'lyrics': 0,
                 'original': 0,
                 'timed_thumbnails': 0,
                 'visual_impaired': 0},
 'duration': '5.005000',
 'duration_ts': 240240,
 'index': 1,
 'max_bit_rate': '138375',
 'nb_frames': '236',
 'profile': 'LC',
 'r_frame_rate': '0/0',
 'sample_fmt': 'fltp',
 'sample_rate': '48000',
 'start_pts': 0,
 'start_time': '0.000000',
 'tags': {'handler_name': 'SoundHandler', 'language': 'eng'},
 'time_base': '1/48000'}


  


• ffmpeg/ffprobe get 'codecs' string for a video/audio stream

  18 décembre 2020, par Richard

  I'm using ffmpeg to create HLS playlists. I used ffmpeg to create them for the renditions. Now I need to create the master playlist .m3u8.

  


  I need to do this manually, for a few reasons. I have everything I need except the 'CODECS' value.

  


  How can I get this CODECS value for the video and audio streams within my file ?

  


  I cannot see the relevant data when I use ffprobe to get all the metadata about the streams.

  


  Example master manifest with CODECS :

  


  #EXTM3U
#EXT-X-VERSION:3
#EXT-X-STREAM-INF:BANDWIDTH=540863,RESOLUTION=640x360,CODECS="avc1.64001e,mp4a.40.2"
v0/prog_index.m3u8

#EXT-X-STREAM-INF:BANDWIDTH=2339363,RESOLUTION=960x540,CODECS="avc1.64001f,mp4a.40.2"
v1/prog_index.m3u8


  


  Example of metadata I could get using ffprobe :

  


  {'avg_frame_rate': '24000/1001',
 'bit_rate': '35956',
 'bits_per_raw_sample': '8',
 'chroma_location': 'left',
 'closed_captions': 0,
 'codec_long_name': 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
 'codec_name': 'h264',
 'codec_tag': '0x31637661',
 'codec_tag_string': 'avc1',
 'codec_time_base': '1001/48000',
 'codec_type': 'video',
 'coded_height': 368,
 'coded_width': 640,
 'display_aspect_ratio': '16:9',
 'disposition': {'attached_pic': 0,
                 'clean_effects': 0,
                 'comment': 0,
                 'default': 1,
                 'dub': 0,
                 'forced': 0,
                 'hearing_impaired': 0,
                 'karaoke': 0,
                 'lyrics': 0,
                 'original': 0,
                 'timed_thumbnails': 0,
                 'visual_impaired': 0},
 'duration': '5.005000',
 'duration_ts': 120120,
 'has_b_frames': 2,
 'height': 360,
 'index': 0,
 'is_avc': 'true',
 'level': 30,
 'nal_length_size': '4',
 'nb_frames': '120',
 'pix_fmt': 'yuv420p',
 'profile': 'High',
 'r_frame_rate': '24000/1001',
 'refs': 1,
 'sample_aspect_ratio': '1:1',
 'start_pts': 0,
 'start_time': '0.000000',
 'tags': {'handler_name': 'VideoHandler',
          'language': 'eng',
          'timecode': '01:00:00:00'},
 'time_base': '1/24000',
 'width': 640}


  


  {'avg_frame_rate': '0/0',
 'bit_rate': '138375',
 'bits_per_sample': 0,
 'channel_layout': 'stereo',
 'channels': 2,
 'codec_long_name': 'AAC (Advanced Audio Coding)',
 'codec_name': 'aac',
 'codec_tag': '0x6134706d',
 'codec_tag_string': 'mp4a',
 'codec_time_base': '1/48000',
 'codec_type': 'audio',
 'disposition': {'attached_pic': 0,
                 'clean_effects': 0,
                 'comment': 0,
                 'default': 1,
                 'dub': 0,
                 'forced': 0,
                 'hearing_impaired': 0,
                 'karaoke': 0,
                 'lyrics': 0,
                 'original': 0,
                 'timed_thumbnails': 0,
                 'visual_impaired': 0},
 'duration': '5.005000',
 'duration_ts': 240240,
 'index': 1,
 'max_bit_rate': '138375',
 'nb_frames': '236',
 'profile': 'LC',
 'r_frame_rate': '0/0',
 'sample_fmt': 'fltp',
 'sample_rate': '48000',
 'start_pts': 0,
 'start_time': '0.000000',
 'tags': {'handler_name': 'SoundHandler', 'language': 'eng'},
 'time_base': '1/48000'}