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Médias (91)

Géodiversité

9 septembre 2011, par bruno, kent1

Mis à jour : Août 2018

Langue : français

Type : Texte

1 commentaire

Tags : kml, géodiversité, carte

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USGS Real-time Earthquakes

8 septembre 2011, par kent1

Mis à jour : Septembre 2011

Langue : français

Type : Texte

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SWFUpload Process

6 septembre 2011, par bruno

Mis à jour : Septembre 2011

Langue : français

Type : Texte

Tags : swfupload

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5
La conservation du net art au musée. Les stratégies à l’œuvre

26 mai 2011

Mis à jour : Juillet 2013

Langue : français

Type : Texte

Tags : thèse, net art, musée

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Podcasting Legal guide

16 mai 2011, par kent1

Mis à jour : Mai 2011

Langue : English

Type : Texte

Tags : pdf, creative commons, doc2img

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Creativecommons informational flyer

16 mai 2011, par kent1

Mis à jour : Juillet 2013

Langue : English

Type : Texte

Tags : pdf, creative commons

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1 | ... | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16

Autres articles (34)

Déploiements possibles

31 janvier 2010, par kent1

Deux types de déploiements sont envisageable dépendant de deux aspects : La méthode d’installation envisagée (en standalone ou en ferme) ; Le nombre d’encodages journaliers et la fréquentation envisagés ;
L’encodage de vidéos est un processus lourd consommant énormément de ressources système (CPU et RAM), il est nécessaire de prendre tout cela en considération. Ce système n’est donc possible que sur un ou plusieurs serveurs dédiés.
Version mono serveur
La version mono serveur consiste à n’utiliser qu’une (...)
Création définitive du canal

12 mars 2010, par kent1

Lorsque votre demande est validée, vous pouvez alors procéder à la création proprement dite du canal. Chaque canal est un site à part entière placé sous votre responsabilité. Les administrateurs de la plateforme n’y ont aucun accès.
A la validation, vous recevez un email vous invitant donc à créer votre canal.
Pour ce faire il vous suffit de vous rendre à son adresse, dans notre exemple "http://votre_sous_domaine.mediaspip.net".
A ce moment là un mot de passe vous est demandé, il vous suffit d’y (...)
Taille des images et des logos définissables

9 février 2011, par kent1

Dans beaucoup d’endroits du site, logos et images sont redimensionnées pour correspondre aux emplacements définis par les thèmes. L’ensemble des ces tailles pouvant changer d’un thème à un autre peuvent être définies directement dans le thème et éviter ainsi à l’utilisateur de devoir les configurer manuellement après avoir changé l’apparence de son site.
Ces tailles d’images sont également disponibles dans la configuration spécifique de MediaSPIP Core. La taille maximale du logo du site en pixels, on permet (...)

1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | ... | 12

Sur d’autres sites (6648)

configure : Remove dcbzl check for e500v1 and e500v2 architectures

6 février 2014, par Peter Krefting

configure : Remove dcbzl check for e500v1 and e500v2 architectures

The DCBZL instruction is not available for the e500v1 and e500v2
architectures, but may still be recognized by the toolchain, so we need to
remove the test for it explicitly for these architectures.

References : PowerPC™ e500 Core Family Reference Manual (Freescale)

Found-by : Ståle Kristoffersen <staalebk@ifi.uio.no>

Signed-off-by : Michael Niedermayer <michaelni@gmx.at>

[D H] configure

SNAP : Simulation and Neuroscience Application Platform

2 décembre 2014, par Sumit

Is there any documentation/help manual on how to use SNAP (Simulation and Neuroscience Application Platform)1.

I wanted to run the Motor Imagery sample scenario with a .avi file for the stimulus instead of the image. How can that be done ?

The following error is obtained when using the AlphaCalibration scenario which gives code to play an avi file.Any help appreciated

:movies:ffmpeg(warning): parser not found for codec indeo4, packets or times may be invalid.

:movies:ffmpeg(warning): max_analyze_duration 5000000 reached at 5000000

:movies(error): Could not open /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi

:audio(error): Cannot open file: /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi

:audio(error): Could not open audio /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi

:movies:ffmpeg(warning): parser not found for codec indeo4, packets or times may be invalid.

:movies:ffmpeg(warning): max_analyze_duration 5000000 reached at 5000000

:movies(error): Could not open /e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi

:gobj(error): Texture "/e/BCI_Feb2014/SNAP-master/src/studies/SampleStudy/bird.avi" exists but cannot be read.

Traceback (most recent call last):

  File "E:\BCI_Feb2014\SNAP-master\src\framework\latentmodule.py", line 458, in _run_wrap

    self.run()

  File "modules\BCI\AlphaCalibration.py", line 30, in run

Exception during run():

    m = self.movie(self.moviefile, block=False, scale=[0.7,0.4],aspect=1.125,contentoffset=[0,0],volume=0.3,timeoffset=self.begintime+t*self.awake_duration,looping=True)

Could not load texture: bird.avi

  File "E:\BCI_Feb2014\SNAP-master\src\framework\basicstimuli.py", line 348, in movie

    tex = self._engine.base.loader.loadTexture(filename)

  File "E:\BCI_Feb2014\Panda3D-1.8.0\direct\showbase\Loader.py", line 554, in loadTexture

    raise IOError, message

IOError: Could not load texture: bird.avi

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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