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La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (78)
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Librairies et binaires spécifiques au traitement vidéo et sonore
31 janvier 2010, parLes logiciels et librairies suivantes sont utilisées par SPIPmotion d’une manière ou d’une autre.
Binaires obligatoires FFMpeg : encodeur principal, permet de transcoder presque tous les types de fichiers vidéo et sonores dans les formats lisibles sur Internet. CF ce tutoriel pour son installation ; Oggz-tools : outils d’inspection de fichiers ogg ; Mediainfo : récupération d’informations depuis la plupart des formats vidéos et sonores ;
Binaires complémentaires et facultatifs flvtool2 : (...) -
Support audio et vidéo HTML5
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Sur d’autres sites (6598)
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brew install ffmpeg installs python 3.9
13 novembre 2020, par mrgloomFor some reason
brew install ffmpeg
downloads python 3.9 as dependence

==> Installing dependencies for ffmpeg: gnutls, python@3.9, glib, cairo, gobject-introspection, harfbuzz, libass and libvpx



As I can see here https://formulae.brew.sh/formula/ffmpeg there is no dependence on python 3.9


How can I install ffmpeg for my current python Python 3.7.7 ?


Update :


Maybe something is broken in my python installation ?


brew info python

python@3.9: stable 3.9.0 (bottled)
Interpreted, interactive, object-oriented programming language
https://www.python.org/
/usr/local/Cellar/python/3.7.7 (4,165 files, 64.0MB) *
 Poured from bottle on 2020-04-03 at 20:11:58
From: https://github.com/Homebrew/homebrew-core/blob/HEAD/Formula/python@3.9.rb
License: Python-2.0
==> Dependencies
Build: pkg-config ✔
Required: gdbm ✔, openssl@1.1 ✔, readline ✔, sqlite ✔, xz ✔
==> Caveats
Python has been installed as
 /usr/local/bin/python3

Unversioned symlinks `python`, `python-config`, `pip` etc. pointing to
`python3`, `python3-config`, `pip3` etc., respectively, have been installed into
 /usr/local/opt/python@3.9/libexec/bin

You can install Python packages with
 pip3 install <package>
They will install into the site-package directory
 /usr/local/lib/python3.9/site-packages

See: https://docs.brew.sh/Homebrew-and-Python
==> Analytics
install: 588,344 (30 days), 666,372 (90 days), 666,373 (365 days)
install-on-request: 104,126 (30 days), 105,703 (90 days), 105,705 (365 days)
build-error: 0 (30 days)
</package>


brew info
showspython@3.9
but actually it's 3.7.7 :

/usr/local/bin/python3 -V
Python 3.7.7



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Convert from opus to ogg file using ffmpeg [python soundfile]
27 septembre 2021, par Zabir Al NaziI'm using python
soundfile
to audio files in one of my projects. I have a dataset that containsopus
files.

python
soundfile
can not read opus files directly but can read ogg files. (https://github.com/bastibe/python-soundfile/issues/252)

How can I convert all the opus files to ogg files with ffmpeg ?


I have tried the following command,


ffmpeg -i test_file_2.opus -c:a libvorbis -b:a 16k test_file_2.ogg




But I get an error,


ffmpeg version 4.3 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 7.3.0 (crosstool-NG 1.23.0.449-a04d0)
 configuration: --prefix=/opt/conda --cc=/opt/conda/conda-bld/ffmpeg_1597178665428/_build_env/bin/x86_64-conda_cos6-linux-gnu-cc --disable-doc --disable-openssl --enable-avresample --enable-gnutls --enable-hardcoded-tables --enable-libfreetype --enable-libopenh264 --enable-pic --enable-pthreads --enable-shared --disable-static --enable-version3 --enable-zlib --enable-libmp3lame
 libavutil 56. 51.100 / 56. 51.100
 libavcodec 58. 91.100 / 58. 91.100
 libavformat 58. 45.100 / 58. 45.100
 libavdevice 58. 10.100 / 58. 10.100
 libavfilter 7. 85.100 / 7. 85.100
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 7.100 / 5. 7.100
 libswresample 3. 7.100 / 3. 7.100
[ogg @ 0x55bad6b9cbc0] 543 bytes of comment header remain
Input #0, ogg, from 'test_file_2.opus':
 Duration: 00:00:14.10, start: 0.000000, bitrate: 34 kb/s
 Stream #0:0: Audio: opus, 48000 Hz, mono, fltp
 Metadata:
 album : Onder Moeders Vleugels
 ENCODER_OPTIONS : --quiet
 artist : Louisa May Alcott
 title : 02 - Een vroolijk kerstfeest
 encoder : opusenc from opus-tools 0.1.10;Lavf57.83.100
Unknown encoder 'libvorbis'




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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:1
This 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 ?