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  • How to export audio from a iPhone video file with FFmpeg ?

    11 janvier 2020, par DanScripter

    UPDATE 1 the problem resides in the input read-stream. (check below)

    I am using fluent-ffmpeg (version : 2.1.2) to get a .mp3 file out of a video file that I input as a stream .createReadStream(). I output the file as a .pipe to a remoteWriteStream.

    ffmpeg -i pipe:0 -vn -f mp3 -acodec mp3 -movflags frag_keyframe+empty_moov pipe:1

    This works fine with .mp4, .webm and .mov (codec : prores) files.

    But it somehow does not want to work with a .mov out of an iPhone 11. FFmpeg is not giving me any error when running above code. It creates the .mp3 file but the size is just 152 B and it is not playable.

    I ffprobed the iPhone .mov files it returns this :

    "{ streams: 
    
   [ { index: 0,
    
       codec_name: 'hevc',
    
       codec_long_name: 'H.265 / HEVC (High Efficiency Video Coding)',
    
       profile: 'Main',
    
       codec_type: 'video',
    
       codec_time_base: '1111/33300',
    
       codec_tag_string: 'hvc1',
    
       codec_tag: '0x31637668',
    
       width: 1920,
    
       height: 1080,
    
       coded_width: 1920,
    
       coded_height: 1088,
    
       has_b_frames: 2,
    
       sample_aspect_ratio: '0:1',
    
       display_aspect_ratio: '0:1',
    
       pix_fmt: 'yuv420p',
    
       level: 120,
    
       color_range: 'tv',
    
       color_space: 'bt709',
    
       color_transfer: 'bt709',
    
       color_primaries: 'bt709',
    
       chroma_location: 'unspecified',
    
       field_order: 'unknown',
    
       timecode: 'N/A',
    
       refs: 1,
    
       id: 'N/A',
    
       r_frame_rate: '30000/1001',
    
       avg_frame_rate: '33300/1111',
    
       time_base: '1/600',
    
       start_pts: 'N/A',
    
       start_time: 'N/A',
    
       duration_ts: 6666,
    
       duration: 11.11,
    
       bit_rate: 7611708,
    
       max_bit_rate: 'N/A',
    
       bits_per_raw_sample: 'N/A',
    
       nb_frames: 333,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] },
    
     { index: 1,
    
       codec_name: 'aac',
    
       codec_long_name: 'AAC (Advanced Audio Coding)',
    
       profile: 'unknown',
    
       codec_type: 'audio',
    
       codec_time_base: '1/44100',
    
       codec_tag_string: 'mp4a',
    
       codec_tag: '0x6134706d',
    
       sample_fmt: 'fltp',
    
       sample_rate: 44100,
    
       channels: 2,
    
       channel_layout: 'stereo',
    
       bits_per_sample: 0,
    
       id: 'N/A',
    
       r_frame_rate: '0/0',
    
       avg_frame_rate: '0/0',
    
       time_base: '1/44100',
    
       start_pts: 'N/A',
    
       start_time: 'N/A',
    
       duration_ts: 489951,
    
       duration: 11.11,
    
       bit_rate: 135091,
    
       max_bit_rate: 192000,
    
       bits_per_raw_sample: 'N/A',
    
       nb_frames: 481,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] },
    
     { index: 2,
    
       codec_name: 'unknown',
    
       codec_long_name: 'unknown',
    
       profile: 'unknown',
    
       codec_type: 'data',
    
       codec_tag_string: 'mebx',
    
       codec_tag: '0x7862656d',
    
       id: 'N/A',
    
       r_frame_rate: '0/0',
    
       avg_frame_rate: '0/0',
    
       time_base: '1/600',
    
       start_pts: 'N/A',
    
       start_time: 'N/A',
    
       duration_ts: 6666,
    
       duration: 11.11,
    
       bit_rate: 2670,
    
       max_bit_rate: 'N/A',
    
       bits_per_raw_sample: 'N/A',
    
       nb_frames: 38,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] },
    
     { index: 3,
    
       codec_name: 'unknown',
    
       codec_long_name: 'unknown',
    
       profile: 'unknown',
    
       codec_type: 'data',
    
       codec_tag_string: 'mebx',
    
       codec_tag: '0x7862656d',
    
       id: 'N/A',
    
       r_frame_rate: '0/0',
    
       avg_frame_rate: '0/0',
    
       time_base: '1/600',
    
       start_pts: 'N/A',
    
       start_time: 'N/A',
    
       duration_ts: 6666,
    
       duration: 11.11,
    
       bit_rate: 7,
    
       max_bit_rate: 'N/A',
    
       bits_per_raw_sample: 'N/A',
    
       nb_frames: 1,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] },
    
     { index: 4,
    
       codec_name: 'unknown',
    
       codec_long_name: 'unknown',
    
       profile: 'unknown',
    
       codec_type: 'data',
    
       codec_tag_string: 'mebx',
    
       codec_tag: '0x7862656d',
    
       id: 'N/A',
    
       r_frame_rate: '0/0',
    
       avg_frame_rate: '0/0',
    
       time_base: '1/600',
    
       start_pts: 'N/A',
    
       start_time: 'N/A',
    
       duration_ts: 6666,
    
       duration: 11.11,
    
       bit_rate: 18117,
    
       max_bit_rate: 'N/A',
    
       bits_per_raw_sample: 'N/A',
    
       nb_frames: 333,
    
       nb_read_frames: 'N/A',
    
       nb_read_packets: 'N/A',
    
       tags: [Object],
    
       disposition: [Object] } ],
    
  format: 
    
   { filename: 'pipe:0',
    
     nb_streams: 5,
    
     nb_programs: 0,
    
     format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
    
     format_long_name: 'QuickTime / MOV',
    
     start_time: 'N/A',
    
     duration: 11.11,
    
     size: 'N/A',
    
     bit_rate: 'N/A',
    
     probe_score: 100,
    
     tags: 
    
      { major_brand: 'qt  ',
    
        minor_version: '0',
    
        compatible_brands: 'qt  ',
    
        creation_time: '2020-01-11T12:33:36.000000Z',
    
        'com.apple.quicktime.make': 'Apple',
    
        'com.apple.quicktime.model': 'iPhone 11',
    
        'com.apple.quicktime.software': '13.3',
    
        'com.apple.quicktime.creationdate': '2020-01-11T13:33:36+0100' } },
    
  chapters: [] }"

    The created .mp3 file results in a undefined.

    I already tried to take the .mov re-encode it to an .mp4 via ffmpeg and then try the above code to get the .mp3 - still does not work.

    Any advice how I can make this work ?

    thanks !

    UPDATE 1
    The problem resides in the input stream ! When I download the file to the local machine and input it as as a local file, not as a read stream, it works perfectly.

    I am creating the stream from a google cloud bucket like this :

    const myBucket = storage.bucket('myBucket');
    
const remoteReadStream = myBucket.file(file).createReadStream();

    Since this code is perfectly working with all other codecs, what maybe the issue while creating the read stream from the google cloud from a h265 file ?

  • How to deal ffplay being too slow playing iPhone's videos ?

    8 janvier 2020, par Mikhail T.

    Trying to play a 3840x2160 video recorded by an iPhone 7 (@30fps), I get frequent pauses — in the video, music keeps playing.

    



    This happens both in firefox and when ffplay is invoked to play the file directly — from command-line. The CPU is a dual E6700 @3.20GHz — not super fast, but it should be able to play smoothly, shouldn't it ? Video is Intel's "series 4" integrated chipset — again, not a speed-daemon, but it should be adequate... Support for Intel's VA API is included.

    



    I build ffmpeg-4.1 from source using FreeBSD port. As you can see, the port has a maddening amount of options — including several different ones for the 264-codec.

    



    Any suggestions for improving the decoding speed to the point, where it is watchable by a human ? Thank you !

    


  • How to deal ffplay being too slow playing iPhone's videos ?

    8 janvier 2020, par Mikhail T.

    Trying to play a 3840x2160 video recorded by an iPhone 7 (@30fps), I get frequent pauses — in the video, music keeps playing.

    This happens both in firefox and when ffplay is invoked to play the file directly — from command-line. The CPU is a dual E6700 @3.20GHz — not super fast, but it should be able to play smoothly, shouldn’t it ? Video is Intel’s "series 4" integrated chipset — again, not a speed-daemon, but it should be adequate... Support for Intel’s VA API is included.

    I build ffmpeg-4.1 from source using FreeBSD port. As you can see, the port has a maddening amount of options — including several different ones for the 264-codec.

    Any suggestions for improving the decoding speed to the point, where it is watchable by a human ? Thank you !

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