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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Emballe médias : à quoi cela sert ?

    4 février 2011, par

    Ce plugin vise à gérer des sites de mise en ligne de documents de tous types.
    Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ;

  • Les formats acceptés

    28 janvier 2010, par

    Les commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
    ffmpeg -codecs ffmpeg -formats
    Les format videos acceptés en entrée
    Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
    Les formats vidéos de sortie possibles
    Dans un premier temps on (...)

Sur d’autres sites (8814)

  • ffmpeg hwmap SW decoded frame to OpenCL and hwmap back to h264 for SW encode

    3 novembre 2019, par Oleksandr Kyrpa

    I trying speed up process and avoid copy frames between GPU and CPU. But got error : "Segmentation fault : 11", so may be I’m doing something wrong ?

    My full ffmpeg command and log here :

    ./ffmpeg -i ../720.mp4 -init_hw_device opencl=ocl:0.1 -filter_hw_device ocl  -filter_complex "hwmap,avgblur_opencl=30,hwmap"  -c:v h264 -an -t 10 -y ../out_blur.mp4 -loglevel debug

    Output :

    ./ffmpeg -i ../720.mp4 -init_hw_device opencl=ocl:0.1 -filter_hw_device ocl  -filter_complex "hwmap,avgblur_opencl=30,hwmap"  -c:v h264 -an -t 10 -y ../out_blur.mp4 -loglevel debug
    ffmpeg version N-95621-g53c21c2d6b Copyright (c) 2000-2019 the FFmpeg developers
     built with Apple LLVM version 10.0.0 (clang-1000.10.44.4)
     configuration: --enable-fontconfig --enable-gpl --enable-libaom --enable-libass --enable-libbluray --enable-libfreetype --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --disable-ffplay --enable-nonfree --enable-opencl
     libavutil      56. 35.101 / 56. 35.101
     libavcodec     58. 60.100 / 58. 60.100
     libavformat    58. 33.100 / 58. 33.100
     libavdevice    58.  9.100 / 58.  9.100
     libavfilter     7. 66.100 /  7. 66.100
     libswscale      5.  6.100 /  5.  6.100
     libswresample   3.  6.100 /  3.  6.100
     libpostproc    55.  6.100 / 55.  6.100
    Splitting the commandline.
    Reading option '-i' ... matched as input url with argument '../720.mp4'.
    Reading option '-init_hw_device' ... matched as option 'init_hw_device' (initialise hardware device) with argument 'opencl=ocl:0.1'.
    Reading option '-filter_hw_device' ... matched as option 'filter_hw_device' (set hardware device used when filtering) with argument 'ocl'.
    Reading option '-filter_complex' ... matched as option 'filter_complex' (create a complex filtergraph) with argument 'hwmap,unsharp_opencl=lx=17:ly=17:la=5,hwmap'.
    Reading option '-c:v' ... matched as option 'c' (codec name) with argument 'h264'.
    Reading option '-an' ... matched as option 'an' (disable audio) with argument '1'.
    Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '10'.
    Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
    Reading option '../out_blur.mp4' ... matched as output url.
    Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
    Finished splitting the commandline.
    Parsing a group of options: global .
    Applying option init_hw_device (initialise hardware device) with argument opencl=ocl:0.1.
    [AVHWDeviceContext @ 0x7fbb1ec08480] 1 OpenCL platforms found.
    [AVHWDeviceContext @ 0x7fbb1ec08480] 3 OpenCL devices found on platform "Apple".
    [AVHWDeviceContext @ 0x7fbb1ec08480] 0.1: Apple / HD Graphics 4000
    Applying option filter_hw_device (set hardware device used when filtering) with argument ocl.
    Applying option filter_complex (create a complex filtergraph) with argument hwmap,unsharp_opencl=lx=17:ly=17:la=5,hwmap.
    Applying option y (overwrite output files) with argument 1.
    Applying option loglevel (set logging level) with argument debug.
    Successfully parsed a group of options.
    Parsing a group of options: input url ../720.mp4.
    Successfully parsed a group of options.
    Opening an input file: ../720.mp4.
    [NULL @ 0x7fbb1f818c00] Opening '../720.mp4' for reading
    [file @ 0x7fbb1ec3d600] Setting default whitelist 'file,crypto'
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] ISO: File Type Major Brand: isom
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Unknown dref type 0x206c7275 size 12
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Processing st: 0, edit list 0 - media time: 0, duration: 300300
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] Before avformat_find_stream_info() pos: 4123312 bytes read:34929 seeks:1 nb_streams:1
    [h264 @ 0x7fbb1f9ae800] nal_unit_type: 7(SPS), nal_ref_idc: 1
    [h264 @ 0x7fbb1f9ae800] nal_unit_type: 8(PPS), nal_ref_idc: 1
    [h264 @ 0x7fbb1f9ae800] nal_unit_type: 6(SEI), nal_ref_idc: 0
    [h264 @ 0x7fbb1f9ae800] nal_unit_type: 5(IDR), nal_ref_idc: 1
    [h264 @ 0x7fbb1f9ae800] Format yuv420p chosen by get_format().
    [h264 @ 0x7fbb1f9ae800] Reinit context to 1280x720, pix_fmt: yuv420p
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] All info found
    [mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fbb1f818c00] After avformat_find_stream_info() pos: 38244 bytes read:73125 seeks:2 frames:1
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '../720.mp4':
     Metadata:
       major_brand     : isom
       minor_version   : 512
       compatible_brands: isomiso2avc1mp41
       encoder         : Lavf58.33.100
     Duration: 00:00:10.01, start: 0.000000, bitrate: 3295 kb/s
       Stream #0:0(und), 1, 1/30000: Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(left), 1280x720 [SAR 1:1 DAR 16:9], 0/1, 3293 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 60k tbc (default)
       Metadata:
         handler_name    : ISO Media file produced by Google Inc. Created on: 10/24/2018.
    Successfully opened the file.
    [Parsed_unsharp_opencl_1 @ 0x7fbb1ec45640] Setting 'lx' to value '17'
    [Parsed_unsharp_opencl_1 @ 0x7fbb1ec45640] Setting 'ly' to value '17'
    [Parsed_unsharp_opencl_1 @ 0x7fbb1ec45640] Setting 'la' to value '5'
    Parsing a group of options: output url ../out_blur.mp4.
    Applying option c:v (codec name) with argument h264.
    Applying option an (disable audio) with argument 1.
    Applying option t (record or transcode "duration" seconds of audio/video) with argument 10.
    Successfully parsed a group of options.
    Opening an output file: ../out_blur.mp4.
    Matched encoder 'libx264' for codec 'h264'.
    [file @ 0x7fbb1ec44680] Setting default whitelist 'file,crypto'
    Successfully opened the file.
    detected 8 logical cores
    [h264 @ 0x7fbb1f9a9800] nal_unit_type: 7(SPS), nal_ref_idc: 1
    [h264 @ 0x7fbb1f9a9800] nal_unit_type: 8(PPS), nal_ref_idc: 1
    Stream mapping:
     Stream #0:0 (h264) -> hwmap
     hwmap -> Stream #0:0 (libx264)
    Press [q] to stop, [?] for help
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
       Last message repeated 1 times
    [h264 @ 0x7fbb1f9a9800] nal_unit_type: 6(SEI), nal_ref_idc: 0
    [h264 @ 0x7fbb1f9a9800] nal_unit_type: 5(IDR), nal_ref_idc: 1
    [h264 @ 0x7fbb1f9a9800] Format yuv420p chosen by get_format().
    [h264 @ 0x7fbb1f9a9800] Reinit context to 1280x720, pix_fmt: yuv420p
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    [h264 @ 0x7fbb1f9b7e00] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    [h264 @ 0x7fbb1f9cf200] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    [h264 @ 0x7fbb1fa04c00] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    [h264 @ 0x7fbb1fa1b000] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    [h264 @ 0x7fbb1fa24800] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    [h264 @ 0x7fbb1fa24e00] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    cur_dts is invalid st:0 (0) [init:0 i_done:0 finish:0] (this is harmless if it occurs once at the start per stream)
    [h264 @ 0x7fbb1fa25400] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    [h264 @ 0x7fbb22809200] nal_unit_type: 1(Coded slice of a non-IDR picture), nal_ref_idc: 1
    [Parsed_unsharp_opencl_1 @ 0x7fbb1ed04e80] Setting 'lx' to value '17'
    [Parsed_unsharp_opencl_1 @ 0x7fbb1ed04e80] Setting 'ly' to value '17'
    [Parsed_unsharp_opencl_1 @ 0x7fbb1ed04e80] Setting 'la' to value '5'
    [graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'video_size' to value '1280x720'
    [graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'pix_fmt' to value '0'
    [graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'time_base' to value '1/30000'
    [graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'pixel_aspect' to value '1/1'
    [graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'sws_param' to value 'flags=2'
    [graph 0 input from stream 0:0 @ 0x7fbb1ee09040] Setting 'frame_rate' to value '30000/1001'
    [graph 0 input from stream 0:0 @ 0x7fbb1ee09040] w:1280 h:720 pixfmt:yuv420p tb:1/30000 fr:30000/1001 sar:1/1 sws_param:flags=2
    [format @ 0x7fbb1ed0a080] Setting 'pix_fmts' to value 'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21|yuv420p10le|yuv422p10le|yuv444p10le|nv20le'
    [AVFilterGraph @ 0x7fbb21004240] query_formats: 7 queried, 6 merged, 0 already done, 0 delayed
    [Parsed_hwmap_2 @ 0x7fbb1ed03e00] picking yuv420p out of 13 ref:opencl alpha:1
    [Parsed_hwmap_0 @ 0x7fbb1ed09940] Configure hwmap yuv420p -> opencl.
    [Parsed_hwmap_2 @ 0x7fbb1ed03e00] Configure hwmap opencl -> yuv420p.
    [hwmap @ 0x7fbb1ed03940] Filter input: yuv420p, 1280x720 (0).
    Segmentation fault: 11
  • Evolution #4396 (Nouveau) : utiliser SPIP avec MySQL 8.0

    25 octobre 2019, par Nicolas Krebs -

    La branche 8.0 de MySQL est sortie en 2018. À mon avis, il serait bon que SPIP puisse fonctionner avec, et que la compatibilité soit indiquée dans https://www.spip.net/fr_article4351.html .

    Changelog : https://dev.mysql.com/doc/refman/8.0/en/mysql-nutshell.html

  • ffmpeg MKV to MP4 format conversion issues

    28 septembre 2019, par Lucas Lecce

    I converted a 3Gb MKV video file to MP4 format using the following ffmpeg command :

    ffmpeg -i input.mkv -c: v libx264 -crf 23 -c: a aac -movflags faststart output.mp4
    ffmpeg -i input.mkv -acodec copy -vcodec copy output.mp4
    ffmpeg version N-95111-g87ddf9f1ef Copyright (c) 2000-2019 the FFmpeg developers
     built with gcc 9.2.1 (GCC) 20190918
     configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
     libavutil      56. 35.100 / 56. 35.100
     libavcodec     58. 59.100 / 58. 59.100
     libavformat    58. 33.100 / 58. 33.100
     libavdevice    58.  9.100 / 58.  9.100
     libavfilter     7. 59.100 /  7. 59.100
     libswscale      5.  6.100 /  5.  6.100
     libswresample   3.  6.100 /  3.  6.100
     libpostproc    55.  6.100 / 55.  6.100
    Input #0, matroska,webm, from 'input.mkv':
     Metadata:
       title           : claucha75
       encoder         : libebml v1.3.5 + libmatroska v1.4.8
       creation_time   : 2018-01-23T22:07:33.000000Z
     Duration: 01:37:13.89, start: 0.000000, bitrate: 5044 kb/s
       Stream #0:0: Video: h264 (High), yuv420p(tv, bt709, progressive), 1920x1080, SAR 1:1 DAR 16:9, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
       Metadata:
         title           : claucha75
         BPS             : 4146894
         BPS-eng         : 4146894
         DURATION        : 01:37:12.952000000
         DURATION-eng    : 01:37:12.952000000
         NUMBER_OF_FRAMES: 139851
         NUMBER_OF_FRAMES-eng: 139851
         NUMBER_OF_BYTES : 3023579528
         NUMBER_OF_BYTES-eng: 3023579528
         _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_DATE_UTC: 2018-01-23 22:07:33
         _STATISTICS_WRITING_DATE_UTC-eng: 2018-01-23 22:07:33
         _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
         _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
       Stream #0:1(spa): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s (default)
       Metadata:
         title           : Latino
         BPS             : 448000
         BPS-eng         : 448000
         DURATION        : 01:37:13.888000000
         DURATION-eng    : 01:37:13.888000000
         NUMBER_OF_FRAMES: 182309
         NUMBER_OF_FRAMES-eng: 182309
         NUMBER_OF_BYTES : 326697728
         NUMBER_OF_BYTES-eng: 326697728
         _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_DATE_UTC: 2018-01-23 22:07:33
         _STATISTICS_WRITING_DATE_UTC-eng: 2018-01-23 22:07:33
         _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
         _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
       Stream #0:2(eng): Audio: ac3, 48000 Hz, 5.1(side), fltp, 448 kb/s
       Metadata:
         title           : Ingles
         BPS             : 448000
         BPS-eng         : 448000
         DURATION        : 01:37:13.856000000
         DURATION-eng    : 01:37:13.856000000
         NUMBER_OF_FRAMES: 182308
         NUMBER_OF_FRAMES-eng: 182308
         NUMBER_OF_BYTES : 326695936
         NUMBER_OF_BYTES-eng: 326695936
         _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_DATE_UTC: 2018-01-23 22:07:33
         _STATISTICS_WRITING_DATE_UTC-eng: 2018-01-23 22:07:33
         _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
         _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
       Stream #0:3(spa): Subtitle: subrip
       Metadata:
         title           : Sub. Latino
         BPS             : 58
         BPS-eng         : 58
         DURATION        : 01:27:56.723000000
         DURATION-eng    : 01:27:56.723000000
         NUMBER_OF_FRAMES: 1048
         NUMBER_OF_FRAMES-eng: 1048
         NUMBER_OF_BYTES : 38641
         NUMBER_OF_BYTES-eng: 38641
         _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_DATE_UTC: 2018-01-23 22:07:33
         _STATISTICS_WRITING_DATE_UTC-eng: 2018-01-23 22:07:33
         _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
         _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
       Stream #0:4(eng): Subtitle: subrip
       Metadata:
         title           : Sub. Ingles
         BPS             : 72
         BPS-eng         : 72
         DURATION        : 01:32:29.880000000
         DURATION-eng    : 01:32:29.880000000
         NUMBER_OF_FRAMES: 1820
         NUMBER_OF_FRAMES-eng: 1820
         NUMBER_OF_BYTES : 50243
         NUMBER_OF_BYTES-eng: 50243
         _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_DATE_UTC: 2018-01-23 22:07:33
         _STATISTICS_WRITING_DATE_UTC-eng: 2018-01-23 22:07:33
         _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
         _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
    File 'output.mp4' already exists. Overwrite ? [y/N] y
    [mp4 @ 000002935ee0ff00] track 1: codec frame size is not set
    Output #0, mp4, to 'output.mp4':
     Metadata:
       title           : claucha75
       encoder         : Lavf58.33.100
       Stream #0:0: Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709, progressive), 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 23.98 fps, 23.98 tbr, 16k tbn, 1k tbc (default)
       Metadata:
         title           : claucha75
         BPS             : 4146894
         BPS-eng         : 4146894
         DURATION        : 01:37:12.952000000
         DURATION-eng    : 01:37:12.952000000
         NUMBER_OF_FRAMES: 139851
         NUMBER_OF_FRAMES-eng: 139851
         NUMBER_OF_BYTES : 3023579528
         NUMBER_OF_BYTES-eng: 3023579528
         _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_DATE_UTC: 2018-01-23 22:07:33
         _STATISTICS_WRITING_DATE_UTC-eng: 2018-01-23 22:07:33
         _STATISTICS_TAGS: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
         _STATISTICS_TAGS-eng: BPS DURATION NUMBER_OF_FRAMES NUMBER_OF_BYTES
       Stream #0:1(spa): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 448 kb/s (default)
       Metadata:
         title           : Latino
         BPS             : 448000
         BPS-eng         : 448000
         DURATION        : 01:37:13.888000000
         DURATION-eng    : 01:37:13.888000000
         NUMBER_OF_FRAMES: 182309
         NUMBER_OF_FRAMES-eng: 182309
         NUMBER_OF_BYTES : 326697728
         NUMBER_OF_BYTES-eng: 326697728
         _STATISTICS_WRITING_APP: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_APP-eng: mkvmerge v20.0.0 ('I Am The Sun') 64-bit
         _STATISTICS_WRITING_DATE_UTC: 2018-01-23 22:07:33
         _STATISTICS_WRITING_DATE_UTC-eng: 2018-01-23 22:07:33
         _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
    frame=139851 fps=2149 q=-1.0 Lsize= 3275868kB time=01:37:13.85 bitrate=4600.0kbits/s speed=89.7x
    video:2952714kB audio:319041kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.125715%

    The command produces a MP4 file. The file takes a long time to open and then it takes several more minutes for a frame to appear. The converted file is also missing audio.

    Does anyone have an idea about the slow loading time and missing audio ?