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  • Qualité du média après traitement

    21 juin 2013, par

    Le bon réglage du logiciel qui traite les média est important pour un équilibre entre les partis ( bande passante de l’hébergeur, qualité du média pour le rédacteur et le visiteur, accessibilité pour le visiteur ). Comment régler la qualité de son média ?
    Plus la qualité du média est importante, plus la bande passante sera utilisée. Le visiteur avec une connexion internet à petit débit devra attendre plus longtemps. Inversement plus, la qualité du média est pauvre et donc le média devient dégradé voire (...)

  • Le profil des utilisateurs

    12 avril 2011, par

    Chaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
    L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...)

  • Configurer la prise en compte des langues

    15 novembre 2010, par

    Accéder à la configuration et ajouter des langues prises en compte
    Afin de configurer la prise en compte de nouvelles langues, il est nécessaire de se rendre dans la partie "Administrer" du site.
    De là, dans le menu de navigation, vous pouvez accéder à une partie "Gestion des langues" permettant d’activer la prise en compte de nouvelles langues.
    Chaque nouvelle langue ajoutée reste désactivable tant qu’aucun objet n’est créé dans cette langue. Dans ce cas, elle devient grisée dans la configuration et (...)

Sur d’autres sites (4137)

  • add hard coded subs to cutout of video ffmpeg from sub stream ffmpeg [duplicate]

    14 juin 2021, par k-on fan

    Trying to add hardcoded subs using a cutout from a video from the sub stream of the video

    


    ffmpeg -ss 00:10:30 -i "vid.mkv" -an -c:v libvpx -crf 31 -b:v 10000k -y -vf "subtitles='vid_out.mkv'" -t 5 vision2.webm -y -t 5 vision2.mp3


    


    if i try this the stream wont get hard coded ive also tried

    


    ffmpeg -ss 00:10:30 -i "vid.mkv" -an -c:v libvpx -crf 31 -b:v 10000k -y -vf "subtitles='vid_out.mkv:0'" -t 5 vision2.webm -y -t 5 vision2.mp3


    


    and

    


    ffmpeg -ss 00:10:30 -i "vid.mkv" -an -c:v libvpx -crf 31 -b:v 10000k -y -vf "subtitles='vid_out.mkv:si=0'" -t 5 vision2.webm -y -t 5 vision2.mp3


    


    dont know what im doing wrong

    


  • What’s So Hard About Building ?

    10 septembre 2011, par Multimedia Mike — Programming

    I finally had a revelation as to why so building software can be so difficult– because build systems are typically built on programming languages that you don’t normally use in your day to day programming activities. If the project is simple enough, the build system usually takes care of the complexities. If there are subtle complexities — and there always are — then you can to figure out how to customize the build system to meet your needs.

    First, there’s the Makefile. It’s easy to forget that the syntax which comprises a Makefile pretty well qualifies as a programming language. I wonder if it’s Turing-complete ? But writing and maintaining Makefiles manually is arduous and many systems have been created to generate Makefiles for you. At the end of the day, running ‘make’ still requires the presence of a Makefile and in the worst case scenario, you’re going to have to inspect and debug what was automatically generated for that Makefile.

    So there is the widespread GNU build system, a.k.a., “the autotools”, named due to its principle components such as autoconf and automake. In this situation, you have no fewer than 3 distinct languages at work. You write your general build instructions using a set of m4 macros (language #1). These get processed by the autotools in order to generate a shell script (language #2) called configure. When this is executed by the user, it eventually generates a Makefile (language #3).

    Over the years, a few challengers have attempted to dethrone autotools. One is CMake which configures a project using its own custom programming language that you will need to learn. Configuration generates a standard Makefile. So there are 2 languages involved in this approach.

    Another option is SCons, which is Python-based, top to bottom. Only one programming language is involved in the build system ; there’s no Makefile generated and run. Until I started writing this, I was guessing that the Python component generated a Makefile, but no.

    That actually makes SCons look fairly desirable, at least if your only metric when choosing a build system is to minimize friction against rarely-used programming languages.

    I should also make mention of a few others : Apache Ant is a build system in which the build process is described by an XML file. XML doesn’t qualify as a programming language (though that apparently doesn’t stop some people from using it as such). I see there’s also qmake, related to the Qt system. This system uses its own custom syntax.

  • FFmpeg retrieve a specific program from TS file

    8 mai 2017, par chang jc

    I tried to retrieve a specific program from a TS file.
    Said :

    Input #0, mpegts, from 'DVB_T_good.ts':
    
  Duration: 00:00:48.04, start: 55045.888000, bitrate: 14521 kb/s
    
  Program 300 
    
    Metadata:
    
      service_name    : ?l?��}�TS�
    
      service_provider: ?l?��
    
    Stream #0:0[0xbb9]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:1[0xbba]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:2[0xbbb]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 301 
    
    Metadata:
    
      service_name    : ?l?��N��?S�
    
      service_provider: ?l?��
    
    Stream #0:3[0xbc3]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:9[0xbc4]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:10[0xbc5]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 302 
    
    Metadata:
    
      service_name    : ?l?��e��^S�
    
      service_provider: ?l?��
    
    Stream #0:5[0xbcd]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:6[0xbce]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 304 
    
    Metadata:
    
      service_name    : ?l?��S�pcS�
    
      service_provider: ?l?��
    
    Stream #0:4[0xbe1]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:7[0xbe2]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
    
    Stream #0:8[0xbe3]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp

    Then I tried to retrieve a specific program as :

    ffmpeg -i INPUT -map 0:p:1344 OUTPUT

    It succeeds greatly but the only thing I noticed is :

    it seems to apply transcode (decode & encode again) to the output implicitely ?

    ffmpeg version N-85693-g8de3458 Copyright (c) 2000-2017 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
    
  configuration: --prefix=/home/john/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/home/john/ffmpeg_build/include --extra-ldflags=-L/home/john/ffmpeg_build/lib --bindir=/home/john/bin --enable-gpl --enable-libfreetype --enable-libvorbis --enable-libvpx --enable-libx264 --enable-nonfree --disable-ffplay --disable-ffserver --disable-doc --disable-libopus
    
  libavutil      55. 61.100 / 55. 61.100
    
  libavcodec     57. 93.100 / 57. 93.100
    
  libavformat    57. 72.101 / 57. 72.101
    
  libavdevice    57.  7.100 / 57.  7.100
    
  libavfilter     6. 87.100 /  6. 87.100
    
  libswscale      4.  7.101 /  4.  7.101
    
  libswresample   2.  8.100 /  2.  8.100
    
  libpostproc    54.  6.100 / 54.  6.100
    
[NULL @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[NULL @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] SPS unavailable in decode_picture_timing
    
[h264 @ 0x33eb3a0] non-existing PPS 0 referenced
    
[h264 @ 0x33eb3a0] decode_slice_header error
    
[h264 @ 0x33eb3a0] no frame!
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
    Last message repeated 1 times
    
[mpeg2video @ 0x33ea200] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
    Last message repeated 2 times
    
[mpeg2video @ 0x33ec540] Invalid frame dimensions 0x0.
    
[mpeg2video @ 0x33b7680] Invalid frame dimensions 0x0.
    
[mpegts @ 0x33af360] PES packet size mismatch
    
    Last message repeated 9 times
    
Input #0, mpegts, from 'DVB_T_good.ts':
    
  Duration: 00:00:48.04, start: 55045.888000, bitrate: 14521 kb/s
    
  Program 300 
    
    Metadata:
    
      service_name    : ?l?��}�TS�
    
      service_provider: ?l?��
    
    Stream #0:0[0xbb9]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:1[0xbba]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:2[0xbbb]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 301 
    
    Metadata:
    
      service_name    : ?l?��N��?S�
    
      service_provider: ?l?��
    
    Stream #0:3[0xbc3]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:9[0xbc4]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
    Stream #0:10[0xbc5]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 302 
    
    Metadata:
    
      service_name    : ?l?��e��^S�
    
      service_provider: ?l?��
    
    Stream #0:5[0xbcd]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p(tv, top first), 704x480 [SAR 10:11 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:6[0xbce]: Audio: mp2 ([3][0][0][0] / 0x0003), 48000 Hz, stereo, s16p, 128 kb/s
    
  Program 304 
    
    Metadata:
    
      service_name    : ?l?��S�pcS�
    
      service_provider: ?l?��
    
    Stream #0:4[0xbe1]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(tv, bt709, top first), 1920x1080 [SAR 1:1 DAR 16:9], 29.97 fps, 59.94 tbr, 90k tbn, 59.94 tbc
    
    Stream #0:7[0xbe2]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
    
    Stream #0:8[0xbe3]: Audio: aac_latm (HE-AAC) ([17][0][0][0] / 0x0011), 48000 Hz, stereo, fltp
    
map 0:p:304
    
File '304_1800.ts' already exists. Overwrite ? [y/N] y
    
Stream mapping:
    
  Stream #0:4 -> #0:0 (h264 (native) -> mpeg2video (native))
    
  Stream #0:7 -> #0:1 (aac_latm (native) -> mp2 (native))
    
  Stream #0:8 -> #0:2 (aac_latm (native) -> mp2 (native))
    
Press [q] to stop, [?] for help
    
[h264 @ 0x33d6d20] mmco: unref short failure
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[h264 @ 0x33d6d20] reference picture missing during reorder
    
[h264 @ 0x33d6d20] Missing reference picture, default is 65784
    
[h264 @ 0x33d6d20] reference picture missing during reorder
    
[h264 @ 0x33d6d20] Missing reference picture, default is 65785
    
Output #0, mpegts, to '304_1800.ts':
    
  Metadata:
    
    encoder         : Lavf57.72.101
    
    Stream #0:0: Video: mpeg2video (Main), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
    
    Metadata:
    
      encoder         : Lavc57.93.100 mpeg2video
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2
    
    Stream #0:2: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2
    
[h264 @ 0x33d6d20] mmco: unref short failureime=00:00:44.34 bitrate=3506.2kbits/s speed=1.43x    
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[mpegts @ 0x33af360] PES packet size mismatch
    
[aac_latm @ 0x3587360] Number of bands (59) exceeds limit (45).
    
Error while decoding stream #0:7: Invalid data found when processing input
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] mmco: unref short failure
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[h264 @ 0x33d6d20] mmco: unref short failureime=00:00:45.05 bitrate=3491.2kbits/s speed=1.43x    
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[h264 @ 0x33d6d20] mmco: unref short failure
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] number of reference frames (0+5) exceeds max (4; probably corrupt input), discarding one
    
[mpegts @ 0x33af360] PES packet size mismatchme=00:00:47.74 bitrate=3470.1kbits/s speed=1.43x    
    
    Last message repeated 1 times
    
[h264 @ 0x33d6d20] error while decoding MB 97 35, bytestream -12
    
Error while decoding stream #0:7: Invalid data found when processing input
    
Error while decoding stream #0:8: Invalid data found when processing input
    
frame= 1404 fps= 42 q=31.0 Lsize=   20396kB time=00:00:47.88 bitrate=3489.5kbits/s speed=1.42x    
    
video:14144kB audio:4429kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 9.813825%

    You could notice by following message :

    **

    Output #0, mpegts, to '304_1800.ts':
    
  Metadata:
    
    encoder         : Lavf57.72.101
    
    Stream #0:0: Video: mpeg2video (Main), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 29.97 fps, 90k tbn, 29.97 tbc
    
    Metadata:
    
      encoder         : Lavc57.93.100 mpeg2video
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2
    
    Stream #0:2: Audio: mp2, 48000 Hz, stereo, s16, 384 kb/s
    
    Metadata:
    
      encoder         : Lavc57.93.100 mp2

    **

    If so, could I avoid the transcoding by command ? Or it is a necessary ?
    It it is a need, WHY ?

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