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The Great Big Beautiful Tomorrow
28 octobre 2011, par
Mis à jour : Octobre 2011
Langue : English
Type : Texte
Autres articles (13)
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Ajouter notes et légendes aux images
7 février 2011, parPour pouvoir ajouter notes et légendes aux images, la première étape est d’installer le plugin "Légendes".
Une fois le plugin activé, vous pouvez le configurer dans l’espace de configuration afin de modifier les droits de création / modification et de suppression des notes. Par défaut seuls les administrateurs du site peuvent ajouter des notes aux images.
Modification lors de l’ajout d’un média
Lors de l’ajout d’un média de type "image" un nouveau bouton apparait au dessus de la prévisualisation (...) -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)
Sur d’autres sites (4049)
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Ffmpeg converts video of double size of original video with second part without audio
21 janvier 2020, par mridul4cI am converting some videos with below command in ffmpeg
ffmpeg -y -i source.mp4 -c:a libfdk_aac -ac 2 -ab 128k -c:v libx264 -x264opts keyint=24:min-keyint=24:no-scenecut -crf 18 -b:v 4000k -maxrate 4000k -bufsize 4000k -vf "scale=-1:1080" destination_1080.mp4
But in some cases the output video is exactly double size of the original and the second part is without audio. Please help.
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Not all portions of video play well after concatenation
24 septembre 2018, par srgbndNode.JS 8.11.4, fluent-ffmpeg 2.1.2
I need to concatenate random portions of the same length of different videos in one video file. The concatenation proceeds without errors. But when I play the final concatenated file I see some portions playing well with sound, others have video "frozen" but sounds playing.
What’s the problem ? I want all portions playing well in the final concatenated file.
Concatenation config :
trex@cave:/media/trex/safe1/Development/app$ head concat_config.txt
file /media/trex/safe1/Development/app/videos/test/417912400.mp4
inpoint 145
outpoint 155
file /media/trex/safe1/Development/app/videos/test/440386842.mp4
inpoint 59
outpoint 69
file /media/trex/safe1/Development/app/videos/test/417912400.mp4
inpoint 144
outpoint 154
...In total, I have 16 portions of 2 videos. Duration of a portion is 10 sec. In the future the number of video files and portions will be much bigger.
trex@cave:/media/trex/safe1/Development/app$ ls -lh videos/test/
total 344M
-rw-r--r-- 1 trex trex 90M set 23 12:19 417912400.mp4
-rw-r--r-- 1 trex trex 254M set 23 12:19 440386842.mp4JavaScript code for the concatentaion :
const fs = require('fs');
const path = require('path');
const _ = require('lodash');
const ffmpegPath = require('@ffmpeg-installer/ffmpeg').path;
const ffprobePath = require('@ffprobe-installer/ffprobe').path;
const ffmpeg = require('fluent-ffmpeg');
ffmpeg.setFfmpegPath(ffmpegPath);
ffmpeg.setFfprobePath(ffprobePath);
function getMetadata(absPathToFile) {
return new Promise(function (resolve, reject) {
ffmpeg.ffprobe(absPathToFile, function(err, metadata) {
if (err) {
reject('get video meta: ' + err.toString());
}
resolve(metadata);
});
});
}
async function getFormat(files) {
const pArray = files.map(async f => {
const meta = await getMetadata(f);
meta.format.short_filename = meta.format.filename.split('/').pop();
return meta.format;
});
return await Promise.all(pArray);
}
function getSliceValues(duration, max = 10) {
max = duration < max ? duration * 0.5 : max; // sec
const start = _.random(0, duration * 0.9);
const end = start + max > duration ? duration : start + max;
return `inpoint ${Math.floor(start)}\noutpoint ${Math.floor(end)}\n`;
}
function addPath(arr, aPath) {
return arr.map(e => path.join(aPath, e));
}
function createConfig(meta) {
return meta.map(video => `file ${video.filename}\n${getSliceValues(video.duration)}`).join('');
}
function duplicateMeta(meta) {
for (let i = 0; i < 3; i++) {
meta.push(...meta);
}
return _.shuffle(meta);
}
const videoFolder = path.join(__dirname, 'videos/test');
const finalVideo = 'final_video.mp4';
const configFile = 'concat_config.txt';
// main
(async () => {
let videos = addPath(fs.readdirSync(videoFolder), videoFolder);
let meta = await getFormat(videos);
meta = duplicateMeta(meta); // get multiple portions of videos
fs.writeFileSync(configFile, createConfig(meta));
const mpeg = ffmpeg();
mpeg.input(configFile)
.inputOptions(['-f concat', '-safe 0'])
.outputOptions('-c copy')
.save(finalVideo);
})();Video files formats :
{ streams:
[ { index: 0,
codec_name: 'h264',
codec_long_name: 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
profile: 'High',
codec_type: 'video',
codec_time_base: '1001/60000',
codec_tag_string: 'avc1',
codec_tag: '0x31637661',
width: 1920,
height: 1080,
coded_width: 1920,
coded_height: 1088,
has_b_frames: 2,
sample_aspect_ratio: '1:1',
display_aspect_ratio: '16:9',
pix_fmt: 'yuv420p',
level: 40,
color_range: 'tv',
color_space: 'bt709',
color_transfer: 'bt709',
color_primaries: 'bt709',
chroma_location: 'left',
field_order: 'unknown',
timecode: 'N/A',
refs: 1,
is_avc: 'true',
nal_length_size: 4,
id: 'N/A',
r_frame_rate: '30000/1001',
avg_frame_rate: '30000/1001',
time_base: '1/30000',
start_pts: 0,
start_time: 0,
duration_ts: 4936900,
duration: 164.563333,
bit_rate: 4323409,
max_bit_rate: 'N/A',
bits_per_raw_sample: 8,
nb_frames: 4932,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] },
{ index: 1,
codec_name: 'aac',
codec_long_name: 'AAC (Advanced Audio Coding)',
profile: 'LC',
codec_type: 'audio',
codec_time_base: '1/48000',
codec_tag_string: 'mp4a',
codec_tag: '0x6134706d',
sample_fmt: 'fltp',
sample_rate: 48000,
channels: 2,
channel_layout: 'stereo',
bits_per_sample: 0,
id: 'N/A',
r_frame_rate: '0/0',
avg_frame_rate: '0/0',
time_base: '1/48000',
start_pts: 0,
start_time: 0,
duration_ts: 7899120,
duration: 164.565,
bit_rate: 256000,
max_bit_rate: 263232,
bits_per_raw_sample: 'N/A',
nb_frames: 7714,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] } ],
format:
{ filename: '/media/trex/safe1/Development/app/videos/test/417912400.mp4',
nb_streams: 2,
nb_programs: 0,
format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
format_long_name: 'QuickTime / MOV',
start_time: 0,
duration: 164.565,
size: 94298844,
bit_rate: 4584150,
probe_score: 100,
tags:
{ major_brand: 'mp42',
minor_version: '0',
compatible_brands: 'mp42mp41isomavc1',
creation_time: '2015-09-21T19:11:21.000000Z' } },
chapters: [] }
{ streams:
[ { index: 0,
codec_name: 'h264',
codec_long_name: 'H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10',
profile: 'High',
codec_type: 'video',
codec_time_base: '1001/48000',
codec_tag_string: 'avc1',
codec_tag: '0x31637661',
width: 2560,
height: 1440,
coded_width: 2560,
coded_height: 1440,
has_b_frames: 2,
sample_aspect_ratio: '1:1',
display_aspect_ratio: '16:9',
pix_fmt: 'yuv420p',
level: 51,
color_range: 'tv',
color_space: 'bt709',
color_transfer: 'bt709',
color_primaries: 'bt709',
chroma_location: 'left',
field_order: 'unknown',
timecode: 'N/A',
refs: 1,
is_avc: 'true',
nal_length_size: 4,
id: 'N/A',
r_frame_rate: '24000/1001',
avg_frame_rate: '24000/1001',
time_base: '1/24000',
start_pts: 0,
start_time: 0,
duration_ts: 4206200,
duration: 175.258333,
bit_rate: 11891834,
max_bit_rate: 'N/A',
bits_per_raw_sample: 8,
nb_frames: 4202,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] },
{ index: 1,
codec_name: 'aac',
codec_long_name: 'AAC (Advanced Audio Coding)',
profile: 'LC',
codec_type: 'audio',
codec_time_base: '1/48000',
codec_tag_string: 'mp4a',
codec_tag: '0x6134706d',
sample_fmt: 'fltp',
sample_rate: 48000,
channels: 2,
channel_layout: 'stereo',
bits_per_sample: 0,
id: 'N/A',
r_frame_rate: '0/0',
avg_frame_rate: '0/0',
time_base: '1/48000',
start_pts: 0,
start_time: 0,
duration_ts: 8414160,
duration: 175.295,
bit_rate: 256000,
max_bit_rate: 262152,
bits_per_raw_sample: 'N/A',
nb_frames: 8217,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] } ],
format:
{ filename: '/media/trex/safe1/Development/app/videos/test/440386842.mp4',
nb_streams: 2,
nb_programs: 0,
format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
format_long_name: 'QuickTime / MOV',
start_time: 0,
duration: 175.295,
size: 266214940,
bit_rate: 12149345,
probe_score: 100,
tags:
{ major_brand: 'mp42',
minor_version: '0',
compatible_brands: 'mp42mp41isomavc1',
creation_time: '2015-11-15T19:30:49.000000Z' } },
chapters: [] } -
How can I generate encoded HEVC bitstream using ffmpeg ?
31 octobre 2014, par jgmaoI am able to encoded YUV file to mp4 using HEVC :
ffmpeg.exe -f rawvideo -s 1920x1080 -pix_fmt yuv420p -i input.yuv -c:v hevc -r 30 -x265-params crf=27 -vframes 300 -an -y test.mp4
Here is the mp4box -info test.mp4 shows :
* Movie Info *
Timescale 1000 - Duration 00:00:10.000
1 track(s)
Fragmented File: no
File suitable for progressive download (moov before mdat)
File Brand isom - version 512
Created: UNKNOWN DATE Modified: UNKNOWN DATE File has no MPEG4 IOD/OD
iTunes Info:
Encoder Software: Lavf56.11.100
Track # 1 Info - TrackID 1 - TimeScale 15360 - Media Duration 00:00:10.000 Track has 1 edit lists: track duration is 00:00:10.000 Media Info: Language "Undetermined" - Type "vide:hev1" - 300 samples Visual Track layout: x=0 y=0 width=1920 height=1080 MPEG-4 Config: Visual Stream - ObjectTypeIndication 0x23 HEVC Video - Visual Size 1920 x 1080
HEVC Info: Profile Main @ Level 5 - Chroma Format 1
NAL Unit length bits: 32 - general profile compatibility 0x60000000
Parameter Sets: 1 VPS 1 SPS 1 PPS
SPS resolution 1920x1080
Bit Depth luma 8 - Chroma 8 - 1 temporal layersBut how can I get the decodeble bit stream ? I tried
mp4box -raw 1 test.mp4 -out out.bin
It gives :
Extracting MPEG-H HEVC stream to hevc
But the out.bin couldn’t be decoded by HM or elecard.
Thanks