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  • FFMPEG muxed as a private data stream and may not be recognized upon reading

    4 mars 2021, par Jimmy

    I've came across a mkv with a codec of hevc , while trying to either convert it to m3u8 or mp4 I received this following message :

    


    [mpegts @ 0x7f94de014600] Stream 1, codec flac, is muxed as a private data stream and may not be recognized upon reading.

    


    Is there something wrong with my ffmpeg parameters ?

    


    To m3u8 :
#1 :

    


    ffmpeg -i aaa.mkv -s 1920x1080 -codec copy -bsf:v hevc_mp4toannexb -start_number 0 -hls_time 10 -segment_time 10 -hls_list_size 0 -f hls aaa.m3u8


    


    #2 :

    


    ffmpeg -i aaa.mkv -s 1920x1080 -codec copy -c:v libx264 -bsf:v hevc_mp4toannexb -start_number 0 -hls_time 10 -segment_time 10 -hls_list_size 0 -f hls aaa.m3u8


    


    To mp4 :

    


    #1 :

    


    ffmpeg -i aaa.mkv -c copy ccc.mp4


    


    #2 :

    


    ffmpeg -y -i aaa.mkv -codec copy -strict -2 ccc.mp4


    


    Edit :
FFMPEG dump :

    


    ffmpeg version 4.3.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.27)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_4 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --disable-libjack --disable-indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, matroska,webm, from 'aaa.mkv':
  Metadata:
    encoder         : libebml v1.3.4 + libmatroska v1.4.5
    creation_time   : 2016-12-20T17:13:09.000000Z
  Duration: 00:24:18.92, start: 0.000000, bitrate: 4395 kb/s
    Chapter #0:0: start 0.000000, end 96.096000
    Metadata:
      title           : CHAPTER00
    Chapter #0:1: start 96.096000, end 134.050000
    Metadata:
      title           : CHAPTER01
    Chapter #0:2: start 134.050000, end 224.099000
    Metadata:
      title           : CHAPTER02
    Chapter #0:3: start 224.099000, end 708.082000
    Metadata:
      title           : CHAPTER03
    Chapter #0:4: start 708.082000, end 1302.050000
    Metadata:
      title           : CHAPTER04
    Chapter #0:5: start 1302.050000, end 1392.015000
    Metadata:
      title           : CHAPTER05
    Chapter #0:6: start 1392.015000, end 1428.051000
    Metadata:
      title           : CHAPTER06
    Chapter #0:7: start 1428.051000, end 1458.920000
    Metadata:
      title           : CHAPTER07
    Stream #0:0(jpn): Video: hevc (Main 10), yuv420p10le(tv), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 23.98 tbc (default)
    Metadata:
      BPS             : 3671317
      BPS-eng         : 3671317
      DURATION        : 00:24:18.916000000
      DURATION-eng    : 00:24:18.916000000
      NUMBER_OF_FRAMES: 34979
      NUMBER_OF_FRAMES-eng: 34979
      NUMBER_OF_BYTES : 669518018
      NUMBER_OF_BYTES-eng: 669518018
      _STATISTICS_WRITING_APP: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2016-12-20 17:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-20 17:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(jpn): Audio: flac, 48000 Hz, stereo, s16 (default)
    Metadata:
      BPS             : 722497
      BPS-eng         : 722497
      DURATION        : 00:24:18.920000000
      DURATION-eng    : 00:24:18.920000000
      NUMBER_OF_FRAMES: 17097
      NUMBER_OF_FRAMES-eng: 17097
      NUMBER_OF_BYTES : 131758259
      NUMBER_OF_BYTES-eng: 131758259
      _STATISTICS_WRITING_APP: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2016-12-20 17:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-20 17:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Output #0, hls, to 'aaa.m3u8':
  Metadata:
    encoder         : Lavf58.45.100
    Chapter #0:0: start 0.000000, end 96.096000
    Metadata:
      title           : CHAPTER00
    Chapter #0:1: start 96.096000, end 134.050000
    Metadata:
      title           : CHAPTER01
    Chapter #0:2: start 134.050000, end 224.099000
    Metadata:
      title           : CHAPTER02
    Chapter #0:3: start 224.099000, end 708.082000
    Metadata:
      title           : CHAPTER03
    Chapter #0:4: start 708.082000, end 1302.050000
    Metadata:
      title           : CHAPTER04
    Chapter #0:5: start 1302.050000, end 1392.015000
    Metadata:
      title           : CHAPTER05
    Chapter #0:6: start 1392.015000, end 1428.051000
    Metadata:
      title           : CHAPTER06
    Chapter #0:7: start 1428.051000, end 1458.920000
    Metadata:
      title           : CHAPTER07
    Stream #0:0(jpn): Video: hevc (Main 10), yuv420p10le(tv), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 23.98 tbr, 90k tbn, 23.98 tbc (default)
    Metadata:
      BPS             : 3671317
      BPS-eng         : 3671317
      DURATION        : 00:24:18.916000000
      DURATION-eng    : 00:24:18.916000000
      NUMBER_OF_FRAMES: 34979
      NUMBER_OF_FRAMES-eng: 34979
      NUMBER_OF_BYTES : 669518018
      NUMBER_OF_BYTES-eng: 669518018
      _STATISTICS_WRITING_APP: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2016-12-20 17:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-20 17:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    Stream #0:1(jpn): Audio: flac, 48000 Hz, stereo, s16 (default)
    Metadata:
      BPS             : 722497
      BPS-eng         : 722497
      DURATION        : 00:24:18.920000000
      DURATION-eng    : 00:24:18.920000000
      NUMBER_OF_FRAMES: 17097
      NUMBER_OF_FRAMES-eng: 17097
      NUMBER_OF_BYTES : 131758259
      NUMBER_OF_BYTES-eng: 131758259
      _STATISTICS_WRITING_APP: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_APP-eng: mkvmerge v9.4.2 ('So High') 64bit
      _STATISTICS_WRITING_DATE_UTC: 2016-12-20 17:13:09
      _STATISTICS_WRITING_DATE_UTC-eng: 2016-12-20 17:13:09
      _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
      _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[mpegts @ 0x7f8b8a020e00] Stream 1, codec flac, is muxed as a private data stream and may not be recognized upon reading.


    


  • Transcoding with the GCP Transcoder API results in a time gap

    3 mars 2021, par banyan

    I've been trying GCP's Transcoder API and having trouble with the time randomly becoming shorter than specified in certain cases.

    


    The specific cases are as follows :

    


      

    1. Specifying startTimeOffset and endTimeOffset (cut off 2 seconds before and after the video)

      2. 


    2. fMP4 is used as container

      3. 


    3. input video is mp4 with screen recording on iPad Pro

      4. 


    


    For example, if I don't specify startTimeOffset and endTimeOffset, the time will not be shortened. Also, there is no problem when MPEG2-TS is specified for container. There may be a problem with the video itself, but I haven't found a clue how to set it up.

    


    I'm not sure whether this is a problem with the Transcoder API or with me.

    


    The test input video : https://gofile.io/d/DUT9rr

    


    ❯ ffprobe input.mp4
ffprobe version 4.3.1 Copyright (c) 2007-2020 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.28)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_8 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 1
    compatible_brands: isommp41mp42
    creation_time   : 2021-02-26T15:08:58.000000Z
  Duration: 00:02:51.15, start: 0.000000, bitrate: 551 kb/s
    Stream #0:0(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 246 kb/s (default)
    Metadata:
      creation_time   : 2021-02-26T15:08:58.000000Z
      handler_name    : Core Media Audio
    Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuvj420p(pc, bt709/bt709/iec61966-2-1), 1920x1342, 302 kb/s, 12.39 fps, 120 tbr, 600 tbn, 1200 tbc (default)
    Metadata:
      rotate          : 180
      creation_time   : 2021-02-26T15:08:58.000000Z
      handler_name    : Core Media Video
    Side data:
      displaymatrix: rotation of -180.00 degrees


    


    #!/bin/bash -eu

cat > request.json << EOF
{
  "config": {
    "inputs": [
      {
        key: "input0"
      }
    ],
    "editList": [
      {
        "key": "atom0",
        "inputs": [
          "input0"
        ],
        "startTimeOffset": "2s",
        "endTimeOffset": "169s",
      },
    ],
    "elementaryStreams": [
      {
        "videoStream": {
          "codec": "h265",
          "heightPixels": 480,
          "bitrateBps": 1200000,
          "rateControlMode": "vbr",
          "enableTwoPass": true,
          "frameRate": 30,
          "crfLevel": 31,
          "gopDuration": "3.0s",
        },
        "key": "h265-stream0"
      },
      {
        "videoStream": {
          "codec": "h265",
          "heightPixels": 720,
          "bitrateBps": 1550000,
          "rateControlMode": "vbr",
          "enableTwoPass": true,
          "frameRate": 30,
          "crfLevel": 31,
          "gopDuration": "3.0s",
        },
        "key": "h265-stream1"
      },
      {
        "videoStream": {
          "codec": "h265",
          "heightPixels": 1080,
          "bitrateBps": 2600000,
          "rateControlMode": "vbr",
          "enableTwoPass": true,
          "frameRate": 30,
          "crfLevel": 31,
          "gopDuration": "3.0s",
        },
        "key": "h265-stream2"
      },
      {
        "audioStream": {
          "codec": "aac",
          "bitrateBps": 64000,
          "channelCount": 2,
          "channelLayout": [
            "fl",
            "fr"
          ],
          "sampleRateHertz": 48000
        },
        "key": "audio-stream0"
      },
    ],
    "muxStreams": [
      {
        "key": "media-sd",
        "fileName": "media-sd.m4s",
        "container": "fmp4",
        "elementaryStreams": [
          "h265-stream0",
        ],
        "segmentSettings": {
          "individualSegments": true
        },
      },
      {
        "key": "media-hd",
        "fileName": "media-hd.m4s",
        "container": "fmp4",
        "elementaryStreams": [
          "h265-stream1",
        ],
        "segmentSettings": {
          "individualSegments": true
        },
      },
      {
        "key": "media-fhd",
        "fileName": "media-fhd.m4s",
        "container": "fmp4",
        "elementaryStreams": [
          "h265-stream2",
        ],
        "segmentSettings": {
          "individualSegments": true
        },
      },
      {
        "key": "audio-only",
        "fileName": "audio-only.m4s",
        "container": "fmp4",
        "elementaryStreams": [
          "audio-stream0"
        ],
        "segmentSettings": {
          "individualSegments": true
        },
      },
    ],
    "manifests": [
      {
        "fileName": "manifest-h265.mpd",
        "type": "DASH",
        "muxStreams": [
          "media-sd",
          "media-hd",
          "media-fhd",
          "audio-only",
        ]
      },
    ]
  }
}
EOF

curl -X POST \
-H "Authorization: Bearer "$(gcloud auth application-default print-access-token) \
-H "Content-Type: application/json; charset=utf-8" \
-d @request.json \
https://transcoder.googleapis.com/v1beta1/projects/MY_PROJECT/locations/asia-east1/jobTemplates?jobTemplateId=test-template


    


    #!/bin/bash -eu

cat > request.json << EOF
{
  "inputUri": "gs://my-bucket/input.mp4",
  "outputUri": "gs://my-bucket/output/",
  "templateId": "test-template"
}
EOF

curl -X POST \
-H "Authorization: Bearer "$(gcloud auth application-default print-access-token) \
-H "Content-Type: application/json; charset=utf-8" \
-d @request.json \
https://transcoder.googleapis.com/v1beta1/projects/MY_PROJECT/locations/asia-east1/jobs


    


    The following is a ffprobe of the resulting manifest file, which is 2 seconds shorter than specified. (expected : 00:02:47.00, actual : 00:02:45.00) In this case, it's a 2-second gap, but it can be 10 seconds or 30 seconds, and it varies from video to video.

    


    ❯ ffprobe manifest-h265.mpd
ffprobe version 4.3.1 Copyright (c) 2007-2020 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.28)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_8 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
Input #0, dash, from 'manifest-h265.mpd':
  Duration: 00:02:45.00, start: 0.000000, bitrate: 0 kb/s
  Program 0
    Stream #0:0: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709/unknown/unknown), 686x480, 112 kb/s, 30 fps, 120 tbr, 10k tbn, 30 tbc
    Metadata:
      variant_bitrate : 113679
      id              : 113679
    Stream #0:1: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709/unknown/unknown), 1030x720, 205 kb/s, 30 fps, 120 tbr, 10k tbn, 30 tbc
    Metadata:
      variant_bitrate : 189219
      id              : 189219
    Stream #0:2: Video: hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709/unknown/unknown), 1544x1080, 384 kb/s, 30 fps, 120 tbr, 10k tbn, 30 tbc
    Metadata:
      variant_bitrate : 358043
      id              : 358043
    Stream #0:3: Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 65 kb/s
    Metadata:
      variant_bitrate : 70245
      id              : 70245


    


    The following is the time as specified for h264 + MPEG2-TS + Apple HLS.

    


    ❯ ffprobe manifest-h264.m3u8 | pbcopy
ffprobe version 4.3.1 Copyright (c) 2007-2020 the FFmpeg developers
  built with Apple clang version 12.0.0 (clang-1200.0.32.28)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/4.3.1_8 --enable-shared --enable-pthreads --enable-version3 --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libdav1d --enable-libmp3lame --enable-libopus --enable-librav1e --enable-librubberband --enable-libsnappy --enable-libsrt --enable-libtesseract --enable-libtheora --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-libsoxr --enable-videotoolbox --enable-libzmq --enable-libzimg --disable-libjack --disable-indev=jack
  libavutil      56. 51.100 / 56. 51.100
  libavcodec     58. 91.100 / 58. 91.100
  libavformat    58. 45.100 / 58. 45.100
  libavdevice    58. 10.100 / 58. 10.100
  libavfilter     7. 85.100 /  7. 85.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  7.100 /  5.  7.100
  libswresample   3.  7.100 /  3.  7.100
  libpostproc    55.  7.100 / 55.  7.100
[hls @ 0x7fe23100f200] Opening 'h264-sd-ts.m3u8' for reading
[hls @ 0x7fe23100f200] Skip ('#EXT-X-VERSION:4')
[hls @ 0x7fe23100f200] Opening 'h264-hd-ts.m3u8' for reading
[hls @ 0x7fe23100f200] Skip ('#EXT-X-VERSION:4')
[hls @ 0x7fe23100f200] Opening 'h264-fhd-ts.m3u8' for reading
[hls @ 0x7fe23100f200] Skip ('#EXT-X-VERSION:4')
[hls @ 0x7fe23100f200] Opening 'h264-sd0000000000.ts' for reading
[hls @ 0x7fe23100f200] Opening 'h264-hd0000000000.ts' for reading
[hls @ 0x7fe23100f200] Opening 'h264-fhd0000000000.ts' for reading
Input #0, hls, from 'manifest-h264.m3u8':
  Duration: 00:02:47.00, start: 0.000000, bitrate: 0 kb/s
  Program 0
    Metadata:
      variant_bitrate : 511576
    Stream #0:0: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 686x480, 120 tbr, 90k tbn, 2000k tbc
    Metadata:
      variant_bitrate : 511576
    Stream #0:1: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
    Metadata:
      variant_bitrate : 511576
  Program 1
    Metadata:
      variant_bitrate : 793711
    Stream #0:2: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1030x720, 120 tbr, 90k tbn, 2000k tbc
    Metadata:
      variant_bitrate : 793711
    Stream #0:3: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
    Metadata:
      variant_bitrate : 793711
  Program 2
    Metadata:
      variant_bitrate : 1305288
    Stream #0:4: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p, 1544x1080, 120 tbr, 90k tbn, 2000k tbc
    Metadata:
      variant_bitrate : 1305288
    Stream #0:5: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp
    Metadata:
      variant_bitrate : 1305288


    


  • Cannot use Mobile FFmpeg and LibVLCSharp together in Xamarin.Forms project

    26 février 2021, par Travis P

    I am adding video stream capture functionality to a Xamarin Forms project. I am trying to use VLC's LibVLCSharp.Forms (https://github.com/videolan/libvlcsharp) package and the Mobile ffmpeg Xamarin wrapper package, Laerdal.Xamarin.FFmpeg.* (https://github.com/Laerdal/Laerdal.Xamarin.FFmpeg.iOS). However, the internal ffmpeg library from VLC is conflicting with the ffmpeg wrapper and is built with different flags which exclude functionality that I need.

    


    For native development, it looks like you can configure a preferred library with the OTHER_LDFLAGS flag in the Pods-<your app="app">.debug.xcconfig</your> file but I don't see where to do that with Xamarin.Forms.&#xA;Source : https://github.com/tanersener/mobile-ffmpeg/wiki/Using-Multiple-FFmpeg-Implementations-In-The-Same-iOS-Application

    &#xA;

    How can I configure Xamarin iOS builds to prefer the mobile ffmpeg library over the VLC ffmpeg library ? If I am able to use the mobile ffmpeg library, will it cause issues with VLC ?

    &#xA;

    Here is a log message when I try to run commands with ffmpeg. As you can see, ffmpeg's internal library paths reference "vlc" :

    &#xA;

    FFmpegExecute: Command: -vsync 1 -i &#x27;rtsp://wowzaec2demo.streamlock.net/vod/mp4:bigbuckbunny_115k.mov&#x27; -force_key_frames "expr: gte(t, n_forced * 2)" -strict experimental -f segment -segment_time 00:00:02 -segment_start_number 0 -reset_timestamps 1 -c:v copy -c:a copy &#x27;[path to temp]/tmp/VideoStream/%01d-record-temp.mp4&#x27;&#xA;Loaded mobile-ffmpeg-full-gpl-x86_64-4.4-lts-20200725&#xA;INFO: ffmpeg version v4.4-dev-416&#xA;INFO:  Copyright (c) 2000-2020 the FFmpeg developers&#xA;INFO:&#xA;INFO:   built with Apple LLVM version 7.3.0 (clang-703.0.31)&#xA;INFO:   configuration: --sysroot=/Applications/Xcode-v7.3.1.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk --prefix=/Users/taner/Projects/mobile-ffmpeg/prebuilt/ios-x86_64/ffmpeg --enable-version3 --arch=x86_64 --cpu=x86_64 --target-os=darwin --ar=/Applications/Xcode-v7.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --cc=clang --cxx=clang&#x2B;&#x2B; --as=&#x27;clang -arch x86_64 -target x86_64-ios-darwin -march=x86-64 -msse4.2 -mpopcnt -m64 -mtune=intel -DMOBILE_FFMPEG_X86_64 -Wno-unused-function -Wno-deprecated-declarations -fstrict-aliasing -DIOS -DMOBILE_FFMPEG_LTS -DMOBILE_FFMPEG_BUILD_DATE=20200725 -isysroot /Applications/Xcode-v7.3.1.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk -O2 -mios-simulator-version-min=9.3 -I/Applications/Xcode-v7.3.1.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator9.3.sdk/usr/include&#x27; --ranlib=/Applications/Xcode-v7.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib --strip=/Applications/Xcode-v7.3.1.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/strip --disable-neon --enable-cross-compile --enable-pic --disable-asm --enable-inline-asm --enable-optimizations --enable-swscale --enable-static --disable-shared --enable-small --disable-v4l2-m2m --disable-outdev=v4l2 --disable-outdev=fbdev --disable-outdev=audiotoolbox --disable-indev=v4l2 --disable-indev=fbdev --disable-openssl --disable-xmm-clobber-test --disable-debug --disable-neon-clobber-test --disable-programs --disable-postproc --disable-doc --disable-htmlpages --disable-manpages --disable-podpages --disable-txtpages --disable-sndio --disable-schannel --disable-securetransport --disable-xlib --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --disable-appkit --disable-alsa --disable-cuda --disable-cuvid --disable-nvenc --disable-vaapi --disable-vdpau --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-gmp --enable-gnutls --enable-libmp3lame --enable-libass --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libxml2 --enable-libopencore-amrnb --enable-libshine --enable-libspeex --enable-libwavpack --enable-libkvazaar --enable-libx264 --enable-gpl --enable-libxvid --enable-gpl --enable-libx265 --enable-gpl --enable-libvidstab --enable-gpl --enable-libilbc --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libaom --enable-libtwolame --disable-sdl2 --enable-libvo-amrwbenc --enable-zlib --enable-audiotoolbox --enable-bzlib --enable-videotoolbox --disable-avfoundation --enable-iconv&#xA;INFO:   WARNING: library configuration mismatch&#xA;INFO:   avutil      configuration: --extra-ldflags=&#x27;-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4&#x27; --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags=&#x27;-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include&#x27; --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared&#xA;INFO:   avcodec     configuration: --extra-ldflags=&#x27;-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4&#x27; --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags=&#x27;-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include&#x27; --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared&#xA;INFO:   avformat    configuration: --extra-ldflags=&#x27;-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4&#x27; --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags=&#x27;-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include&#x27; --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared&#xA;INFO:   swscale     configuration: --extra-ldflags=&#x27;-arch x86_64 -v -Wl,-ios_simulator_version_min,8.4 -L/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/lib -Wl,-ios_simulator_version_min,8.4&#x27; --cc=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang --pkg-config=pkg-config --disable-doc --disable-encoder=vorbis --disable-decoder=opus --enable-libgsm --disable-decoder=mlp --disable-demuxer=mlp --disable-parser=mlp --disable-debug --disable-avdevice --disable-devices --disable-avfilter --disable-filters --disable-protocol=concat --disable-bsfs --disable-bzlib --disable-libvpx --disable-avresample --enable-bsf=vp9_superframe --disable-swresample --disable-iconv --disable-avisynth --disable-nvenc --disable-linux-perf --disable-securetransport --enable-libopenjpeg --enable-libmp3lame --enable-cross-compile --disable-programs --arch=x86_64 --target-os=darwin --disable-lzma --cpu=core2 --enable-pic --extra-ldflags=&#x27;-arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -arch x86_64 -miphoneos-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk -arch x86_64 -O3 -g -miphoneos-version-min=8.4 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include -g -O2 -I/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64/include&#x27; --enable-pthreads --nm= --ar=/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ar --prefix=/Users/Martz/Projects/vlckit/libvlc/vlc/contrib/iPhone-x86_64-apple-darwin14-x86_64 --enable-static --disable-shared&#xA;INFO:   libavutil      56. 55.100 / 56.  5.100&#xA;INFO:   libavcodec     58. 96.100 / 58.  6.103&#xA;INFO:   libavformat    58. 48.100 / 58.  3.100&#xA;INFO:   libavdevice    58. 11.101 / 58. 11.101&#xA;INFO:   libavfilter     7. 87.100 /  7. 87.100&#xA;INFO:   libswscale      5.  8.100 /  5.  0.101&#xA;INFO:   libswresample   3.  8.100 /  3.  8.100&#xA;ERROR: Unrecognized option &#x27;segment_time&#x27;.&#xA;FATAL: Error splitting the argument list:&#xA;FATAL: Option not found&#xA;

    &#xA;

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