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Médias (1)
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Video d’abeille en portrait
14 mai 2011, par
Mis à jour : Février 2012
Langue : français
Type : Video
Autres articles (25)
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Encoding and processing into web-friendly formats
13 avril 2011, parMediaSPIP automatically converts uploaded files to internet-compatible formats.
Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
All uploaded files are stored online in their original format, so you can (...) -
Support de tous types de médias
10 avril 2011Contrairement à beaucoup de logiciels et autres plate-formes modernes de partage de documents, MediaSPIP a l’ambition de gérer un maximum de formats de documents différents qu’ils soient de type : images (png, gif, jpg, bmp et autres...) ; audio (MP3, Ogg, Wav et autres...) ; vidéo (Avi, MP4, Ogv, mpg, mov, wmv et autres...) ; contenu textuel, code ou autres (open office, microsoft office (tableur, présentation), web (html, css), LaTeX, Google Earth) (...)
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List of compatible distributions
26 avril 2011, parThe table below is the list of Linux distributions compatible with the automated installation script of MediaSPIP. Distribution nameVersion nameVersion number Debian Squeeze 6.x.x Debian Weezy 7.x.x Debian Jessie 8.x.x Ubuntu The Precise Pangolin 12.04 LTS Ubuntu The Trusty Tahr 14.04
If you want to help us improve this list, you can provide us access to a machine whose distribution is not mentioned above or send the necessary fixes to add (...)
Sur d’autres sites (6422)
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how to remux/fix video file saved with testdisk that reports error "Invalid NAL unit size"
18 août 2022, par LukaI have deleted a video file from an SD card and then 'undeleted' it with tool called testdisk for Linux. It saved complete file (6Gb), but video seems broken (can't be played by any video players) and ffprobe reports :


[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55c613baef00] st: 0 edit list: 1 Missing key frame while searching for timestamp: 1000
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55c613baef00] st: 0 edit list 1 Cannot find an index entry before timestamp: 1000.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55c613baef00] Found duplicated MOOV Atom. Skipped it
[aac @ 0x55c613bb6dc0] channel element 3.6 is not allocated
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-2119335523 > 644375).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (1846222201 > 61596).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-864346179 > 57764).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (822755552 > 161099).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (188456672 > 131075).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-2009136561 > 113517).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-821906870 > 228207).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-516947408 > 120554).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (268246533 > 115897).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-1483463928 > 238451).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-1693450506 > 114421).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (1048922816 > 114846).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-600883429 > 357422).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-1612859848 > 93601).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-600474974 > 111975).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (321873764 > 211226).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-665491613 > 92183).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (258461639 > 95290).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (713914840 > 195792).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-556556768 > 93998).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-1864278243 > 94783).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-333442404 > 203732).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (1836887686 > 95706).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (125657193 > 96573).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-2049008956 > 342294).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (650110420 > 98067).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (694115932 > 100359).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (955742608 > 204098).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (1004021052 > 100944).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-885264782 > 100557).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[h264 @ 0x55c613bb0cc0] Invalid NAL unit size (-1074298568 > 209804).
[h264 @ 0x55c613bb0cc0] Error splitting the input into NAL units.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55c613baef00] decoding for stream 0 failed
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x55c613baef00] Could not find codec parameters for stream 0 (Video: h264 (avc1 / 0x31637661), none(pc, bt709), 1920x1080, 29593 kb/s): unspecified pixel format
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'MVI_1399.MP4':
 Metadata:
 creation_time : 2022-08-17T17:13:19.000000Z
 major_brand : mp42
 minor_version : 1
 make : 
 make-eng : 
 model : 
 model-eng : 
 compatible_brands: mp42avc1CAEP
 Duration: 00:29:59.08, start: 0.000000, bitrate: 29879 kb/s
 Stream #0:0(eng): Video: h264 (avc1 / 0x31637661), none(pc, bt709), 1920x1080, 29593 kb/s, 25 fps, 25 tbr, 25k tbn, 50k tbc (default)
 Metadata:
 creation_time : 2022-08-17T17:13:19.000000Z
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 253 kb/s (default)
 Metadata:
 creation_time : 2022-08-17T17:13:19.000000Z



I'm no programmer, but have used ffmpeg a lot. How can I remux (or even re-encode) such file to fix this and make the file usable for further work ?


I have created a 10seconds snippet with
ffmpeg -i MVI_1399.MP4 -t 00:00:10 -c copy MVI_1399_10sec.mp4
for anyone to check. I also created a ten second snippet from a functioning clip from the same camera (I presume same codec parameters etc) :

https://cb.emanat.si/s/WzTCxHDkzGw3gM3


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Revision c8ed36432e : Non-uniform quantization experiment This framework allows lower quantization bi
4 mars 2015, par Deb MukherjeeChanged Paths :
Modify /configure
Modify /vp9/common/vp9_blockd.h
Modify /vp9/common/vp9_onyxc_int.h
Modify /vp9/common/vp9_quant_common.c
Modify /vp9/common/vp9_quant_common.h
Modify /vp9/common/vp9_rtcd_defs.pl
Modify /vp9/decoder/vp9_decodeframe.c
Modify /vp9/decoder/vp9_detokenize.c
Modify /vp9/encoder/vp9_block.h
Modify /vp9/encoder/vp9_encodemb.c
Modify /vp9/encoder/vp9_encodemb.h
Modify /vp9/encoder/vp9_quantize.c
Modify /vp9/encoder/vp9_quantize.h
Modify /vp9/encoder/vp9_rdopt.c
Non-uniform quantization experimentThis framework allows lower quantization bins to be shrunk down or
expanded to match closer the source distribution (assuming a generalized
gaussian-like central peaky model for the coefficients) in an
entropy-constrained sense. Specifically, the width of the bins 0-4 are
modified as a factor of the nominal quantization step size and from 5
onwards all bins become the same as the nominal quantization step size.
Further, different bin width profiles as well as reconstruction values
can be used based on the coefficient band as well as the quantization step
size divided into 5 ranges.A small gain currently on derflr of about 0.16% is observed with the
same paraemters for all q values.
Optimizing the parameters based on qstep value is left as a TODO for now.Results on derflr with all expts on is +6.08% (up from 5.88%).
Experiments are in progress to tune the parameters for different
coefficient bands and quantization step ranges.Change-Id : I88429d8cb0777021bfbb689ef69b764eafb3a1de
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avformat/iamf_parse : add support for expanded channel layouts
10 décembre 2024, par James Almer