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Richard Stallman et le logiciel libre
19 octobre 2011, par
Mis à jour : Mai 2013
Langue : français
Type : Texte
Autres articles (54)
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Pour ce faire, on utilise l’interface de traduction de SPIP où l’ensemble des modules de langue de MediaSPIP sont à disposition. ll vous suffit de vous inscrire sur la liste de discussion des traducteurs pour demander plus d’informations.
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Support de tous types de médias
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MediaSPIP Player : problèmes potentiels
22 février 2011, parLe lecteur ne fonctionne pas sur Internet Explorer
Sur Internet Explorer (8 et 7 au moins), le plugin utilise le lecteur Flash flowplayer pour lire vidéos et son. Si le lecteur ne semble pas fonctionner, cela peut venir de la configuration du mod_deflate d’Apache.
Si dans la configuration de ce module Apache vous avez une ligne qui ressemble à la suivante, essayez de la supprimer ou de la commenter pour voir si le lecteur fonctionne correctement : /** * GeSHi (C) 2004 - 2007 Nigel McNie, (...)
Sur d’autres sites (11680)
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ffmpeg "Underestimated required buffer size"
10 avril 2021, par KajunaI'm seeing this error on some Windows machine when converting an 8K png stream to ProRes 4444 with ffmpeg. The command looks like




ffmpeg -f image2pipe -framerate 30000/1001 -i - -c:v prores_ks -y output.mov




And the output




ffmpeg version git-2020-06-17-0b3bd00 Copyright (c) 2000-2020 the
FFmpeg developers built with gcc 9.3.1 (GCC) 20200523

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-libsrt —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-libvmaf —enable-libvorbis —enable-libvo-amrwbenc —enable-libmysofa —enable-libspeex —enable-libxvid —enable-libaom —disable-w32threads —enable-libmfx —enable-ffnvcodec —enable-cuda-llvm —enable-cuvid —enable-d3d11va —enable-nvenc —enable-nvdec —enable-dxva2 —enable-avisynth —enable-libopenmpt —enable-amf libavutil 56. 55.100 / 56. 55.100 libavcodec 58. 92.100 / 58. 92.100 libavformat 58. 46.101 / 58. 46.101 libavdevice 58. 11.100 / 58. 11.100 libavfilter 7. 86.100 / 7. 86.100 libswscale 5. 8.100 /
5. 8.100 libswresample 3. 8.100 / 3. 8.100 libpostproc 55. 8.100 / 55. 8.100 [image2pipe @ 000002245a96da40] Stream #0 : not enough frames to estimate rate ; consider increasing probesize Input
#0, image2pipe, from 'pipe :' : Duration : N/A, bitrate : N/A
Stream #0:0 : Video : png, rgba(pc), 7680x3840, 29.97 tbr, 29.97 tbn, 29.97 tbc Stream mapping : Stream #0:0 -> #0:0 (png (native) ->
prores (prores_ks)) frame= 0 fps=0.0 q=0.0 size= 0kB
time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A frame= 0
fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate=
-0.0kbits/s speed=N/A frame= 0 fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A frame= 0
fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate=
-0.0kbits/s speed=N/A frame= 0 fps=0.0 q=0.0 size= 0kB time=-577014:32:22.77 bitrate= -0.0kbits/s speed=N/A [prores_ks @
000002245aaaf080] Autoselected 4:4:4:4 profile because of the used
input colorspace. It can be overridden through -profile option.
[prores_ks @ 000002245aaaf700] Autoselected 4:4:4:4 profile because of
the used input colorspace. It can be overridden through -profile
option. [prores_ks @ 000002245aa1e7c0] Autoselected 4:4:4:4 profile
because of the used input colorspace. It can be overridden through
-profile option. [prores_ks @ 000002245aa1d580] Autoselected 4:4:4:4 profile because of the used input colorspace. It can be overridden
through -profile option. [prores_ks @ 000002245aa1ec40] Autoselected
4:4:4:4 profile because of the used input colorspace. It can be
overridden through -profile option. [prores_ks @ 000002245aa1da00]
Autoselected 4:4:4:4 profile because of the used input colorspace. It
can be overridden through -profile option. [prores_ks @
000002245aa1f540] Autoselected 4:4:4:4 profile because of the used
input colorspace. It can be overridden through -profile option.
[prores_ks @ 000002245aa1de80] Autoselected 4:4:4:4 profile because of
the used input colorspace. It can be overridden through -profile
option. [prores_ks @ 000002245a972b40] Autoselected 4:4:4:4 profile
because of the used input colorspace. It can be overridden through
-profile option. Output #0, mov, to 'output.mov' : Metadata :
encoder : Lavf58.46.101
Stream #0:0 : Video : prores (prores_ks) (ap4h / 0x68347061), yuva444p10le, 7680x3840, q=2-31, 200 kb/s, 29.97 fps, 30k tbn, 29.97
tbc
Metadata :
encoder : Lavc58.92.100 prores_ks frame= 1 fps=0.2 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x

frame= 2 fps=0.3 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A
speed= 0x frame= 3 fps=0.4 q=0.0 size= 0kB
time=00:00:00.00 bitrate=N/A speed= 0x frame= 4 fps=0.4 q=0.0
size= 0kB time=00:00:00.00 bitrate=N/A speed= 0x frame=

5 fps=0.5 q=0.0 size= 0kB time=00:00:00.00 bitrate=N/A speed=

0x [prores_ks @ 000002245aaaf080] Underestimated required buffer
size. Video encoding failed [prores_ks @ 000002245aaaf700]
Underestimated required buffer size. [prores_ks @ 000002245aa1e7c0]
Underestimated required buffer size. [prores_ks @ 000002245aa1d580]
Underestimated required buffer size. [prores_ks @ 000002245aa1ec40]
Underestimated required buffer size. [prores_ks @ 000002245aa1da00]
Underestimated required buffer size. Conversion failed !



How could I debug this considering I don't have access to the problematic machine (a user does) ? Could the "not enough frames to estimate rate ; consider increasing probesize" message be related to the problem ?


Thanks


Edit : I increased probesize and that warning disappeared, but the conversion keeps failing with the same error message "Underestimated required buffer size". I can now reproduce this on one of my Windows machines.


Edit 2 : Not a solution but I found out that this problem is gone if using ffmpeg 4.2.3 and was introduced with 4.3


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Start of video is not labeled as "0" in QuickTime Video from GoPro
26 mars 2020, par John TerragnoliI’m trying to combine four GoPro videos into a single video, and then rotate it 90 degrees. However, the time scales on the bottom of the videos are all wrong. The videos are 17 minutes and 42 second. But the beginning time is labeled as 5:15:20:32 and the ending time is 5:33:01:32. It just looks really weird and I’d like to fix it. After I use ffmpeg to rotate and concatenate the videos, the problem persists. Could it possibly be fixed with Exiftool ?
ffmpeg -safe 0 -f concat -i list.txt -vcodec copy -acodec copy merged_videos.MP4ffmpeg -i input.mov -vf "transpose=1" output.movHere is the exiftool information on one of the videos :
File Name : GOPR3023.MP4
Directory : .
File Size : 3.7 GB
File Modification Date/Time : 2018:04:12 14:56:16-05:00
File Access Date/Time : 2020:03:25 12:17:18-05:00
File Inode Change Date/Time : 2020:03:25 17:57:04-05:00
File Permissions : rwxrwxrwx
File Type : MP4
File Type Extension : mp4
MIME Type : video/mp4
Major Brand : MP4 v1 [ISO 14496-1:ch13]
Minor Version : 2013.10.18
Compatible Brands : mp41
Movie Data Size : 4001979951
Movie Data Offset : 28
Movie Header Version : 0
Create Date : 2018:04:12 14:38:32
Modify Date : 2018:04:12 14:38:32
Time Scale : 60000
Duration : 0:17:42
Preferred Rate : 1
Preferred Volume : 100.00%
Preview Time : 0 s
Preview Duration : 0 s
Poster Time : 0 s
Selection Time : 0 s
Selection Duration : 0 s
Current Time : 0 s
Next Track ID : 6
Firmware Version : HD5.03.02.51.00
Lens Serial Number : NAH6092300301117
Camera Serial Number Hash : 34676f2cdf49b86a1514817a93377bf7
Track Header Version : 0
Track Create Date : 2018:04:12 14:38:32
Track Modify Date : 2018:04:12 14:38:32
Track ID : 1
Track Duration : 0:17:42
Track Layer : 0
Track Volume : 0.00%
Image Width : 1920
Image Height : 1080
Graphics Mode : srcCopy
Op Color : 0 0 0
Compressor ID : avc1
Source Image Width : 1920
Source Image Height : 1080
X Resolution : 72
Y Resolution : 72
Compressor Name : GoPro AVC encoder
Bit Depth : 24
Color Representation : nclx 1 1 1
Video Frame Rate : 59.94
Time Code : 3
Balance : 0
Audio Format : mp4a
Audio Channels : 2
Audio Bits Per Sample : 16
Audio Sample Rate : 48000
Text Font : Unknown (21)
Text Face : Plain
Text Size : 10
Text Color : 0 0 0
Background Color : 65535 65535 65535
Font Name : Helvetica
Other Format : tmcd
Warning : [minor] The ExtractEmbedded option may find more tags in the movie data
Matrix Structure : 1 0 0 0 1 0 0 0 1
Media Header Version : 0
Media Create Date : 2018:04:12 14:38:32
Media Modify Date : 2018:04:12 14:38:32
Media Time Scale : 60000
Media Duration : 0:17:42
Handler Class : Media Handler
Handler Type : NRT Metadata
Handler Description : GoPro SOS
Gen Media Version : 0
Gen Flags : 0 0 0
Gen Graphics Mode : srcCopy
Gen Op Color : 0 0 0
Gen Balance : 0
Meta Format : fdsc
Image Size : 1920x1080
Megapixels : 2.1
Avg Bitrate : 30.1 Mbps
Rotation : 0Part 2
There is a pretty obvious "stutter" at the 17:42 mark where the two clips are combined. I’ve tried using ffmpeg and iMovie, but both give the same results. The GoPro broke up the event into multiple clips on it’s own so it seems weird that there would be any information missing. Is there any way to get rid of this stutter ?Thanks !
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mp4 created by ffmpeg will not play with IPython.display.Video
19 novembre 2020, par AustinI'm creating a mp4 video from jpegs with ffmpeg, using the following command :


ffmpeg -y -threads 0 -f image2 -i jpegs/%05d.jpg -framerate 10 video.mp4

The resulting video will play fine with VLC, but will not play in a Jupyter notebook via :


from IPython.display import Video
Video('video.mp4')


This notebook video functionality has worked for me in the past, so I assume there's something about the codec/mime type that the Video function can't resolve ?



Requested update


New command I've tried :


ffmpeg -y -framerate 10 -i jpegs/%05d.jpg -vf format=yuv420p -movflags +faststart video.mp4

Video still plays fine in VLC and still does not play in Jupyter. I've looked at the duplicates this is marked as and it does not actually seem to be the same issue..


Here's the output (I've removed the framerate and threads flags to simplify) :


algo-1-poqk5_1 | 2020-11-18 21:19:36 [INFO]: ffmpeg output:
algo-1-poqk5_1 | 2020-11-18 21:19:36 [INFO]: ffmpeg version 4.0 Copyright (c) 2000-2018 the FFmpeg developers
algo-1-poqk5_1 | built with gcc 7.2.0 (crosstool-NG fa8859cb)
algo-1-poqk5_1 | configuration: --prefix=/opt/conda --cc=/opt/conda/conda-bld/ffmpeg_1531088893642/_build_env/bin/x86_64-conda_cos6-linux-gnu-cc --disable-doc --enable-shared --enable-static --enable-zlib --enable-pic --enable-gpl --enable-version3 --disable-nonfree --enable-hardcoded-tables --enable-avresample --enable-libfreetype --disable-openssl --disable-gnutls --enable-libvpx --enable-pthreads --enable-libopus --enable-postproc --disable-libx264
algo-1-poqk5_1 | libavutil 56. 14.100 / 56. 14.100
algo-1-poqk5_1 | libavcodec 58. 18.100 / 58. 18.100
algo-1-poqk5_1 | libavformat 58. 12.100 / 58. 12.100
algo-1-poqk5_1 | libavdevice 58. 3.100 / 58. 3.100
algo-1-poqk5_1 | libavfilter 7. 16.100 / 7. 16.100
algo-1-poqk5_1 | libavresample 4. 0. 0 / 4. 0. 0
algo-1-poqk5_1 | libswscale 5. 1.100 / 5. 1.100
algo-1-poqk5_1 | libswresample 3. 1.100 / 3. 1.100
algo-1-poqk5_1 | libpostproc 55. 1.100 / 55. 1.100
algo-1-poqk5_1 | Input #0, image2, from '/opt/ml/model/outputs/01-IR.mp4_1/%05d.jpg':
algo-1-poqk5_1 | Duration: 00:00:12.00, start: 0.000000, bitrate: N/A
algo-1-poqk5_1 | Stream #0:0: Video: mjpeg, yuvj420p(pc, bt470bg/unknown/unknown), 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 25 tbn, 25 tbc
algo-1-poqk5_1 | Stream mapping:
algo-1-poqk5_1 | Stream #0:0 -> #0:0 (mjpeg (native) -> mpeg4 (native))
algo-1-poqk5_1 | Press [q] to stop, [?] for help
algo-1-poqk5_1 | [swscaler @ 0x55b8cc6fcc40] deprecated pixel format used, make sure you did set range correctly
algo-1-poqk5_1 | Output #0, mp4, to '/opt/ml/model/outputs/01-IR.mp4_1/video.mp4':
algo-1-poqk5_1 | Metadata:
algo-1-poqk5_1 | encoder : Lavf58.12.100
algo-1-poqk5_1 | Stream #0:0: Video: mpeg4 (mp4v / 0x7634706D), yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], q=2-31, 200 kb/s, 25 fps, 12800 tbn, 25 tbc
algo-1-poqk5_1 | Metadata:
algo-1-poqk5_1 | encoder : Lavc58.18.100 mpeg4
algo-1-poqk5_1 | Side data:
algo-1-poqk5_1 | cpb: bitrate max/min/avg: 0/0/200000 buffer size: 0 vbv_delay: -1
algo-1-poqk5_1 | frame= 31 fps=0.0 q=31.0 size= 768kB time=00:00:01.20 bitrate=5242.8kbits/s speed=2.33x 
algo-1-poqk5_1 | frame= 64 fps= 63 q=31.0 size= 1280kB time=00:00:02.52 bitrate=4161.0kbits/s speed=2.48x 
algo-1-poqk5_1 | frame= 98 fps= 64 q=31.0 size= 1792kB time=00:00:03.88 bitrate=3783.5kbits/s speed=2.53x 
algo-1-poqk5_1 | frame= 131 fps= 64 q=31.0 size= 2304kB time=00:00:05.20 bitrate=3629.7kbits/s speed=2.55x 
algo-1-poqk5_1 | frame= 164 fps= 64 q=31.0 size= 2560kB time=00:00:06.52 bitrate=3216.5kbits/s speed=2.56x 
algo-1-poqk5_1 | frame= 198 fps= 65 q=31.0 size= 3072kB time=00:00:07.88 bitrate=3193.6kbits/s speed=2.58x 
algo-1-poqk5_1 | frame= 232 fps= 65 q=31.0 size= 3328kB time=00:00:09.24 bitrate=2950.6kbits/s speed= 2.6x 
algo-1-poqk5_1 | frame= 266 fps= 66 q=31.0 size= 3840kB time=00:00:10.60 bitrate=2967.7kbits/s speed=2.62x 
algo-1-poqk5_1 | frame= 299 fps= 66 q=31.0 size= 4096kB time=00:00:11.92 bitrate=2815.0kbits/s speed=2.62x 
algo-1-poqk5_1 | [mp4 @ 0x55b8cc658900] Starting second pass: moving the moov atom to the beginning of the file
algo-1-poqk5_1 | frame= 300 fps= 65 q=31.0 Lsize= 4202kB time=00:00:11.96 bitrate=2877.9kbits/s speed=2.61x 
algo-1-poqk5_1 | video:4199kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.052020%


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