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Autres articles (36)
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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Contribute to documentation
13 avril 2011Documentation is vital to the development of improved technical capabilities.
MediaSPIP welcomes documentation by users as well as developers - including : critique of existing features and functions articles contributed by developers, administrators, content producers and editors screenshots to illustrate the above translations of existing documentation into other languages
To contribute, register to the project users’ mailing (...) -
Use, discuss, criticize
13 avril 2011, parTalk to people directly involved in MediaSPIP’s development, or to people around you who could use MediaSPIP to share, enhance or develop their creative projects.
The bigger the community, the more MediaSPIP’s potential will be explored and the faster the software will evolve.
A discussion list is available for all exchanges between users.
Sur d’autres sites (5836)
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How to export audio from a iPhone video file with FFmpeg ?
11 janvier 2020, par DanScripterUPDATE 1 the problem resides in the input read-stream. (check below)
I am using fluent-ffmpeg (version : 2.1.2) to get a .mp3 file out of a video file that I input as a stream .createReadStream(). I output the file as a .pipe to a remoteWriteStream.
ffmpeg -i pipe:0 -vn -f mp3 -acodec mp3 -movflags frag_keyframe+empty_moov pipe:1This works fine with .mp4, .webm and .mov (codec : prores) files.
But it somehow does not want to work with a .mov out of an iPhone 11. FFmpeg is not giving me any error when running above code. It creates the .mp3 file but the size is just 152 B and it is not playable.
I ffprobed the iPhone .mov files it returns this :
"{ streams:
[ { index: 0,
codec_name: 'hevc',
codec_long_name: 'H.265 / HEVC (High Efficiency Video Coding)',
profile: 'Main',
codec_type: 'video',
codec_time_base: '1111/33300',
codec_tag_string: 'hvc1',
codec_tag: '0x31637668',
width: 1920,
height: 1080,
coded_width: 1920,
coded_height: 1088,
has_b_frames: 2,
sample_aspect_ratio: '0:1',
display_aspect_ratio: '0:1',
pix_fmt: 'yuv420p',
level: 120,
color_range: 'tv',
color_space: 'bt709',
color_transfer: 'bt709',
color_primaries: 'bt709',
chroma_location: 'unspecified',
field_order: 'unknown',
timecode: 'N/A',
refs: 1,
id: 'N/A',
r_frame_rate: '30000/1001',
avg_frame_rate: '33300/1111',
time_base: '1/600',
start_pts: 'N/A',
start_time: 'N/A',
duration_ts: 6666,
duration: 11.11,
bit_rate: 7611708,
max_bit_rate: 'N/A',
bits_per_raw_sample: 'N/A',
nb_frames: 333,
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: 'unknown',
codec_type: 'audio',
codec_time_base: '1/44100',
codec_tag_string: 'mp4a',
codec_tag: '0x6134706d',
sample_fmt: 'fltp',
sample_rate: 44100,
channels: 2,
channel_layout: 'stereo',
bits_per_sample: 0,
id: 'N/A',
r_frame_rate: '0/0',
avg_frame_rate: '0/0',
time_base: '1/44100',
start_pts: 'N/A',
start_time: 'N/A',
duration_ts: 489951,
duration: 11.11,
bit_rate: 135091,
max_bit_rate: 192000,
bits_per_raw_sample: 'N/A',
nb_frames: 481,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] },
{ index: 2,
codec_name: 'unknown',
codec_long_name: 'unknown',
profile: 'unknown',
codec_type: 'data',
codec_tag_string: 'mebx',
codec_tag: '0x7862656d',
id: 'N/A',
r_frame_rate: '0/0',
avg_frame_rate: '0/0',
time_base: '1/600',
start_pts: 'N/A',
start_time: 'N/A',
duration_ts: 6666,
duration: 11.11,
bit_rate: 2670,
max_bit_rate: 'N/A',
bits_per_raw_sample: 'N/A',
nb_frames: 38,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] },
{ index: 3,
codec_name: 'unknown',
codec_long_name: 'unknown',
profile: 'unknown',
codec_type: 'data',
codec_tag_string: 'mebx',
codec_tag: '0x7862656d',
id: 'N/A',
r_frame_rate: '0/0',
avg_frame_rate: '0/0',
time_base: '1/600',
start_pts: 'N/A',
start_time: 'N/A',
duration_ts: 6666,
duration: 11.11,
bit_rate: 7,
max_bit_rate: 'N/A',
bits_per_raw_sample: 'N/A',
nb_frames: 1,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] },
{ index: 4,
codec_name: 'unknown',
codec_long_name: 'unknown',
profile: 'unknown',
codec_type: 'data',
codec_tag_string: 'mebx',
codec_tag: '0x7862656d',
id: 'N/A',
r_frame_rate: '0/0',
avg_frame_rate: '0/0',
time_base: '1/600',
start_pts: 'N/A',
start_time: 'N/A',
duration_ts: 6666,
duration: 11.11,
bit_rate: 18117,
max_bit_rate: 'N/A',
bits_per_raw_sample: 'N/A',
nb_frames: 333,
nb_read_frames: 'N/A',
nb_read_packets: 'N/A',
tags: [Object],
disposition: [Object] } ],
format:
{ filename: 'pipe:0',
nb_streams: 5,
nb_programs: 0,
format_name: 'mov,mp4,m4a,3gp,3g2,mj2',
format_long_name: 'QuickTime / MOV',
start_time: 'N/A',
duration: 11.11,
size: 'N/A',
bit_rate: 'N/A',
probe_score: 100,
tags:
{ major_brand: 'qt ',
minor_version: '0',
compatible_brands: 'qt ',
creation_time: '2020-01-11T12:33:36.000000Z',
'com.apple.quicktime.make': 'Apple',
'com.apple.quicktime.model': 'iPhone 11',
'com.apple.quicktime.software': '13.3',
'com.apple.quicktime.creationdate': '2020-01-11T13:33:36+0100' } },
chapters: [] }"The created .mp3 file results in a undefined.
I already tried to take the .mov re-encode it to an .mp4 via ffmpeg and then try the above code to get the .mp3 - still does not work.
Any advice how I can make this work ?
thanks !
UPDATE 1
The problem resides in the input stream ! When I download the file to the local machine and input it as as a local file, not as a read stream, it works perfectly.I am creating the stream from a google cloud bucket like this :
const myBucket = storage.bucket('myBucket');
const remoteReadStream = myBucket.file(file).createReadStream();Since this code is perfectly working with all other codecs, what maybe the issue while creating the read stream from the google cloud from a h265 file ?
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YUV to RGB by Shader on iPhone
27 octobre 2012, par user1333656Currently I am developing a video player using FFMPEG.
I'm trying to convert YUV420P to RGB by Shader to reduce performance hit and I could see it works fine. The problem is caused when I try to change image size.Case 1. YUV to RGB is perfect. but the image is not exactly fit to Texture Bounds.
For example, if i play 640x360 video, right (640-512) part is cropped and bottom (512-360) is filled with green colored rectangle.FRAME_X=512; //This is texture size
FRAME_Y=512;
avpicture_fill((AVPicture *) f, [currentVideoBuffer.data mutableBytes],
enc->pix_fmt,
FRAME_X, FRAME_Y);
av_picture_copy((AVPicture *) f, (AVPicture *) avFrame,
enc->pix_fmt,
enc->width, enc->height);....
int yuvWidth= FRAME_X ;
int yuvHeight= FRAME_Y;
glBindTexture ( GL_TEXTURE_2D, textureIdY );
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE,
yuvWidth, yuvHeight, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, y_channel);
glBindTexture ( GL_TEXTURE_2D, textureIdU );
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE,
yuvWidth/2, yuvHeight/2, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, u_channel);
glBindTexture ( GL_TEXTURE_2D, textureIdV );
glTexImage2D(GL_TEXTURE_2D, 0, GL_LUMINANCE,
yuvWidth/2, yuvHeight/2, 0, GL_LUMINANCE, GL_UNSIGNED_BYTE, v_channel);Case 2. If i set actual image size to texture size, then image is exactly fit to texture but the color of image is a little bit strange. It has too much green color.
Does anybody give me some clues for this ??
Thanks in advance. -
ffmpeg : create a video from images and sounds
27 septembre 2018, par Yuri GusakYou need to create a video from a set of pictures and sounds using ffmpeg.
Set of pictures : frame_% d.jpg
Sounds :
sound1.mp3 (from 0 ms)
sound2.mp3 (from 1000 ms)
sound3.mp3 (from 2000 ms)I can create a video with one sound :
-i frame_% d.jpg -i sound1.mp3 -r 30 -s 1280x720 -preset ultrafast -crf 25 -shortest movie.mp4and it works.
But I need to add some sounds at different times. How can I do that ? May be -filter_complex will help ?
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