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Submit bugs and patches
13 avril 2011Unfortunately a software is never perfect.
If you think you have found a bug, report it using our ticket system. Please to help us to fix it by providing the following information : the browser you are using, including the exact version as precise an explanation as possible of the problem if possible, the steps taken resulting in the problem a link to the site / page in question
If you think you have solved the bug, fill in a ticket and attach to it a corrective patch.
You may also (...) -
Qualité du média après traitement
21 juin 2013, parLe 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 (...) -
Qu’est ce qu’un masque de formulaire
13 juin 2013, parUn masque de formulaire consiste en la personnalisation du formulaire de mise en ligne des médias, rubriques, actualités, éditoriaux et liens vers des sites.
Chaque formulaire de publication d’objet peut donc être personnalisé.
Pour accéder à la personnalisation des champs de formulaires, il est nécessaire d’aller dans l’administration de votre MediaSPIP puis de sélectionner "Configuration des masques de formulaires".
Sélectionnez ensuite le formulaire à modifier en cliquant sur sont type d’objet. (...)
Sur d’autres sites (4741)
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Unknown V4L2 pixel format equivalent for yuvj420p
23 mars 2020, par c10udI am trying to pipe a mp4 video located in Videos/video.mp4 to a virtual webcam device located at /dev/video0.
I tried running :
ffmpeg -re -i Videos/video.mp4 -map 0:v -f v4l2 /dev/video0
and I keep getting the following error :[video4linux2,v4l2 @ 0x5580cf270100] Unknown V4L2 pixel format equivalent for yuvj420p
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 --
Conversion failed!Full log :
ffmpeg version 4.2.2-1+b1 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 9 (Debian 9.2.1-28)
configuration: --prefix=/usr --extra-version=1+b1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
libavutil 56. 31.100 / 56. 31.100
libavcodec 58. 54.100 / 58. 54.100
libavformat 58. 29.100 / 58. 29.100
libavdevice 58. 8.100 / 58. 8.100
libavfilter 7. 57.100 / 7. 57.100
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 5.100 / 5. 5.100
libswresample 3. 5.100 / 3. 5.100
libpostproc 55. 5.100 / 55. 5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'Videos/video.mp4':
Metadata:
major_brand : mp42
minor_version : 0
compatible_brands: isommp42
creation_time : 2020-03-23T04:24:01.000000Z
com.android.version: 8.1.0
Duration: 00:01:00.14, start: 0.000000, bitrate: 20048 kb/s
Stream #0:0(eng): Video: h264 (Baseline) (avc1 / 0x31637661), yuvj420p(pc, smpte170m), 1920x1080, 19898 kb/s, SAR 1:1 DAR 16:9, 29.43 fps, 29.58 tbr, 90k tbn, 180k tbc (default)
Metadata:
rotate : 270
creation_time : 2020-03-23T04:24:01.000000Z
handler_name : VideoHandle
Side data:
displaymatrix: rotation of 90.00 degrees
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 96 kb/s (default)
Metadata:
creation_time : 2020-03-23T04:24:01.000000Z
handler_name : SoundHandle
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> rawvideo (native))
Press [q] to stop, [?] for help
[video4linux2,v4l2 @ 0x5580cf270100] Unknown V4L2 pixel format equivalent for yuvj420p
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argument
Error initializing output stream 0:0 --
Conversion failed!The desired result is that the mp4 video is seen by apps that try to view the webcam. I am running this on a desktop without a webcam or video interface, which is why I am using
/dev/video0
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How to resize dimensions of video through ffmpeg-python ?
25 janvier, par kunambiI'm trying to resize a video file which a user has uploaded to Django, by using
ffmpeg-python
. The documentation isn't very easy to understand, so I've tried to cobble this together from various sources.

This method is run in a celery container, in order to not slow the experience for the user. The problem I'm facing is that I can't seem to resize the video file. I've tried two different approaches :


from django.db import models
from io import BytesIO
from myapp.models import MediaModel


def resize_video(mypk: str) -> None:
 instance = MediaModel.objects.get(pk=mypk)
 media_instance: models.FileField = instance.media
 media_output = "test.mp4"
 buffer = BytesIO()

 for chunk in media_instance.chunks():
 buffer.write(chunk)

 stream_video = ffmpeg.input("pipe:").video.filter("scale", 720, -1) # resize to 720px width
 stream_audio = ffmpeg.input("pipe:").audio
 process = (
 ffmpeg.output(stream_video, stream_audio, media_output, acodec="aac")
 .overwrite_output()
 .run_async(pipe_stdin=True, quiet=True)
 )
 buffer.seek(0)
 process_out, process_err = process.communicate(input=buffer.getbuffer())
 # (pdb) process_out
 # b''

 # attempting to use `.concat` instead
 process2 = (
 ffmpeg.concat(stream_video, stream_audio, v=1, a=1)
 .output(media_output)
 .overwrite_output()
 .run_async(pipe_stdin=True, quiet=True)
 )
 buffer.seek(0)
 process2_out, process2_err = process2.communicate(input=buffer.getbuffer())
 # (pdb) process2_out
 # b''



As we can see, no matter which approach chosen, the output is an empty binary. The
process_err
andprocess2_err
both generate the following message :

ffmpeg version N-111491-g31979127f8-20230717 Copyright (c) 2000-2023 the
FFmpeg developers
 built with gcc 13.1.0 (crosstool-NG 1.25.0.196_227d99d)
 configuration: --prefix=/ffbuild/prefix --pkg-config-flags=--static
--pkg-config=pkg-config --cross-prefix=x86_64-w64-mingw32- --arch=x86_64
--target-os=mingw32 --enable-gpl --enable-version3 --disable-debug
--disable-w32threads --enable-pthreads --enable-iconv --enable-libxml2
--enable-zlib --enable-libfreetype --enable-libfribidi --enable-gmp
--enable-lzma --enable-fontconfig --enable-libvorbis --enable-opencl
--disable-libpulse --enable-libvmaf --disable-libxcb --disable-xlib
--enable-amf --enable-libaom --enable-libaribb24 --enable-avisynth
--enable-chromaprint --enable-libdav1d --enable-libdavs2
--disable-libfdk-aac --enable-ffnvcodec --enable-cuda-llvm --enable-frei0r
--enable-libgme --enable-libkvazaar --enable-libass --enable-libbluray
--enable-libjxl --enable-libmp3lame --enable-libopus --enable-librist
--enable-libssh --enable-libtheora --enable-libvpx --enable-libwebp
--enable-lv2 --enable-libvpl --enable-openal --enable-libopencore-amrnb
--enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg
--enable-libopenmpt --enable-librav1e --enable-librubberband
--enable-schannel --enable-sdl2 --enable-libsoxr --enable-libsrt
--enable-libsvtav1 --enable-libtwolame --enable-libuavs3d --disable-libdrm
--disable-vaapi --enable-libvidstab --enable-vulkan --enable-libshaderc
--enable-libplacebo --enable-libx264 --enable-libx265 --enable-libxavs2
--enable-libxvid --enable-libzimg --enable-libzvbi
--extra-cflags=-DLIBTWOLAME_STATIC --extra-cxxflags=
--extra-ldflags=-pthread --extra-ldexeflags= --extra-libs=-lgomp
--extra-version=20230717
 libavutil 58. 14.100 / 58. 14.100
 libavcodec 60. 22.100 / 60. 22.100
 libavformat 60. 10.100 / 60. 10.100
 libavdevice 60. 2.101 / 60. 2.101
 libavfilter 9. 8.102 / 9. 8.102
 libswscale 7. 3.100 / 7. 3.100
 libswresample 4. 11.100 / 4. 11.100
 libpostproc 57. 2.100 / 57. 2.100
 "Input #0, mov,mp4,m4a,3gp,3g2,mj2, frompipe:':\r\n"
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 creation_time : 2020-11-10T15:01:09.000000Z
 Duration: 00:00:04.16, start: 0.000000, bitrate: N/A
 Stream #0:0[0x1](eng): Video: h264 (Main) (avc1 / 0x31637661),
yuv420p(progressive), 1920x1080 [SAR 1:1 DAR 16:9], 2649 kb/s, 25 fps, 25
tbr, 25k tbn (default)
 Metadata:
 creation_time : 2020-11-10T15:01:09.000000Z
 handler_name : ?Mainconcept Video Media Handler
 vendor_id : [0][0][0][0]
 encoder : AVC Coding
 Stream #0:1[0x2](eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 317 kb/s (default)
 Metadata:
 creation_time : 2020-11-10T15:01:09.000000Z
 handler_name : #Mainconcept MP4 Sound Media Handler
 vendor_id : [0][0][0][0]
Stream mapping:
 Stream #0:0 (h264) -> scale:default (graph 0)
 scale:default (graph 0) -> Stream #0:0 (libx264)
 Stream #0:1 -> #0:1 (aac (native) -> aac (native))
[libx264 @ 00000243a23a1100] using SAR=1/1
[libx264 @ 00000243a23a1100] using cpu capabilities: MMX2 SSE2Fast SSSE3
SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 00000243a23a1100] profile High, level 3.0, 4:2:0, 8-bit
[libx264 @ 00000243a23a1100] 264 - core 164 - H.264/MPEG-4 AVC codec -
Copyleft 2003-2023 - http://www.videolan.org/x264.html - options: cabac=1
ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00
mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11
fast_pskip=1 chroma_qp_offset=-2 threads=6 lookahead_threads=1
sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0
constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1
weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40
intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0
qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
 "Output #0, mp4, toaa37f8d7685f4df9af85b1cdcd95997e.mp4':\r\n"
 Metadata:
 major_brand : mp42
 minor_version : 0
 compatible_brands: mp42mp41
 encoder : Lavf60.10.100
 Stream #0:0: Video: h264 (avc1 / 0x31637661), yuv420p(tv, progressive),
800x450 [SAR 1:1 DAR 16:9], q=2-31, 25 fps, 12800 tbn
 Metadata:
 encoder : Lavc60.22.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
 Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo,
fltp, 128 kb/s (default)
 Metadata:
 creation_time : 2020-11-10T15:01:09.000000Z
 handler_name : #Mainconcept MP4 Sound Media Handler
 vendor_id : [0][0][0][0]
 encoder : Lavc60.22.100 aac
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A
speed=N/A \r'
frame= 21 fps=0.0 q=28.0 size= 0kB time=00:00:02.75 bitrate= 
0.1kbits/s speed=4.75x \r'
[out#0/mp4 @ 00000243a230bd80] video:91kB audio:67kB subtitle:0kB other
streams:0kB global headers:0kB muxing overhead: 2.838559%
frame= 104 fps=101 q=-1.0 Lsize= 162kB time=00:00:04.13 bitrate=
320.6kbits/s speed=4.02x 
[libx264 @ 00000243a23a1100] frame I:1 Avg QP:18.56 size: 2456
[libx264 @ 00000243a23a1100] frame P:33 Avg QP:16.86 size: 1552
[libx264 @ 00000243a23a1100] frame B:70 Avg QP:17.55 size: 553
[libx264 @ 00000243a23a1100] consecutive B-frames: 4.8% 11.5% 14.4%
69.2%
[libx264 @ 00000243a23a1100] mb I I16..4: 17.3% 82.1% 0.6%
[libx264 @ 00000243a23a1100] mb P I16..4: 5.9% 15.2% 0.4% P16..4: 18.3% 
0.9% 0.4% 0.0% 0.0% skip:58.7%
[libx264 @ 00000243a23a1100] mb B I16..4: 0.8% 0.3% 0.0% B16..8: 15.4% 
1.0% 0.0% direct: 3.6% skip:78.9% L0:34.2% L1:64.0% BI: 1.7%
[libx264 @ 00000243a23a1100] 8x8 transform intra:68.2% inter:82.3%
[libx264 @ 00000243a23a1100] coded y,uvDC,uvAC intra: 4.2% 18.4% 1.2% inter:
1.0% 6.9% 0.0%
[libx264 @ 00000243a23a1100] i16 v,h,dc,p: 53% 25% 8% 14%
[libx264 @ 00000243a23a1100] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 19% 6% 70% 1% 
1% 1% 1% 0% 0%
[libx264 @ 00000243a23a1100] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 46% 21% 15% 2% 
5% 4% 3% 3% 1%
[libx264 @ 00000243a23a1100] i8c dc,h,v,p: 71% 15% 13% 1%
[libx264 @ 00000243a23a1100] Weighted P-Frames: Y:30.3% UV:15.2%
[libx264 @ 00000243a23a1100] ref P L0: 46.7% 7.5% 34.6% 7.3% 3.9%
[libx264 @ 00000243a23a1100] ref B L0: 88.0% 10.5% 1.5%
[libx264 @ 00000243a23a1100] ref B L1: 98.1% 1.9%
[libx264 @ 00000243a23a1100] kb/s:177.73
[aac @ 00000243a23a2e00] Qavg: 1353.589



I'm at a loss right now, would love any feedback/solution.


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GA360 vs GA4 : Key Differences and Challenges
20 mai 2024, par Erin