Recherche avancée

Médias (0)

Mot : - Tags -/xmlrpc

Aucun média correspondant à vos critères n’est disponible sur le site.

Autres articles (65)

  • Mise à jour de la version 0.1 vers 0.2

    24 juin 2013, par

    Explications des différents changements notables lors du passage de la version 0.1 de MediaSPIP à la version 0.3. Quelles sont les nouveautés
    Au niveau des dépendances logicielles Utilisation des dernières versions de FFMpeg (>= v1.2.1) ; Installation des dépendances pour Smush ; Installation de MediaInfo et FFprobe pour la récupération des métadonnées ; On n’utilise plus ffmpeg2theora ; On n’installe plus flvtool2 au profit de flvtool++ ; On n’installe plus ffmpeg-php qui n’est plus maintenu au (...)

  • Personnaliser en ajoutant son logo, sa bannière ou son image de fond

    5 septembre 2013, par

    Certains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;

  • Participer à sa traduction

    10 avril 2011

    Vous pouvez nous aider à améliorer les locutions utilisées dans le logiciel ou à traduire celui-ci dans n’importe qu’elle nouvelle langue permettant sa diffusion à de nouvelles communautés linguistiques.
    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.
    Actuellement MediaSPIP n’est disponible qu’en français et (...)

Sur d’autres sites (13448)

  • Solved : ffmpeg : How can a MOV with transparent background be created ?

    25 mars 2017, par Mat

    (Remark : the error sat, as usual, between back-rest and keyboard. Thanks, Mulvya !)

    Hi, specialists !

    I’m trying - with no success at all - to convert the green pixels of a background into transparent ones and output the result as clip with ffmpeg. N.b. I do not want to lay the clip over anything ; I’m not having a problem with that. What I want is a clip with transparent background for the OpenShot video editor (the chromakey filter of which doesn’t work satisfyingly).

    What I have tried (amongst a felt 1 zillion other things over the last 15 hrs.) was

    ffmpeg.exe -i in.mov -vf chromakey=0x008001:0.115:0.0 -c:v qtrle out.mov

    but the pixels simply would not be transparent. Seemingly, nothing happens. I reckon the filter is ok, because it works fine in a complex chain (overlaying a background image).

    The output of ffprompt -show_stream -show_format of out.mov is as follows :

    [STREAM]
    
index=0
    
codec_name=qtrle
    
codec_long_name=QuickTime Animation (RLE) video
    
profile=unknown
    
codec_type=video
    
codec_time_base=1/30
    
codec_tag_string=rle
    
codec_tag=0x20656c72
    
width=1920
    
height=1080
    
coded_width=1920
    
coded_height=1080
    
has_b_frames=0
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=16:9
    
pix_fmt=bgra
    
level=-99
    
color_range=N/A
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=unspecified
    
field_order=progressive
    
timecode=N/A
    
refs=1
    
id=N/A
    
r_frame_rate=30/1
    
avg_frame_rate=30/1
    
time_base=1/15360
    
start_pts=0
    
start_time=0.000000
    
duration_ts=54789
    
duration=3.566992
    
bit_rate=822383192
    
max_bit_rate=N/A
    
bits_per_raw_sample=N/A
    
nb_frames=107
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
TAG:encoder=Lavc57.64.101 qtrle
    
[/STREAM]
    
[STREAM]
    
index=1
    
codec_name=aac
    
codec_long_name=AAC (Advanced Audio Coding)
    
profile=LC
    
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=926
    
start_time=0.020998
    
duration_ts=157481
    
duration=3.570998
    
bit_rate=132103
    
max_bit_rate=132103
    
bits_per_raw_sample=N/A
    
nb_frames=153
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
[/STREAM]
    
[FORMAT]
    
filename=out.mov
    
nb_streams=2
    
nb_programs=0
    
format_name=mov,mp4,m4a,3gp,3g2,mj2
    
format_long_name=QuickTime / MOV
    
start_time=0.000000
    
duration=3.567000
    
size=366708874
    
bit_rate=822447712
    
probe_score=100
    
TAG:major_brand=qt
    
TAG:minor_version=512
    
TAG:compatible_brands=qt
    
TAG:encoder=Lavf57.56.101
    
[/FORMAT]

    I have a "sample" clip which shows the behaviour I want, with the following stream and information :

    [STREAM]
    
index=0
    
codec_name=qtrle
    
codec_long_name=QuickTime Animation (RLE) video
    
profile=unknown
    
codec_type=video
    
codec_time_base=1/24
    
codec_tag_string=rle
    
codec_tag=0x20656c72
    
width=1920
    
height=1080
    
coded_width=1920
    
coded_height=1080
    
has_b_frames=0
    
sample_aspect_ratio=0:1
    
display_aspect_ratio=0:1
    
pix_fmt=bgra
    
level=-99
    
color_range=N/A
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=unspecified
    
field_order=progressive
    
timecode=N/A
    
refs=1
    
id=N/A
    
r_frame_rate=24/1
    
avg_frame_rate=24/1
    
time_base=1/12288
    
start_pts=0
    
start_time=0.000000
    
duration_ts=74760
    
duration=6.083984
    
bit_rate=49226848
    
max_bit_rate=N/A
    
bits_per_raw_sample=N/A
    
nb_frames=146
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
TAG:encoder=Lavc57.24.102 qtrle
    
[/STREAM]
    
[STREAM]
    
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=0.000000
    
duration_ts=293856
    
duration=6.122000
    
bit_rate=53537
    
max_bit_rate=128000
    
bits_per_raw_sample=N/A
    
nb_frames=288
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
[/STREAM]
    
[FORMAT]
    
filename=templateOK.mov
    
nb_streams=2
    
nb_programs=0
    
format_name=mov,mp4,m4a,3gp,3g2,mj2
    
format_long_name=QuickTime / MOV
    
start_time=0.000000
    
duration=6.144000
    
size=37478506
    
bit_rate=48800138
    
probe_score=100
    
TAG:major_brand=qt
    
TAG:minor_version=512
    
TAG:compatible_brands=qt
    
TAG:encoder=Lavf57.25.100
    
[/FORMAT]

    and I simply am not able to spot the relevant difference.

    Any suggestions would be highly appreciated !

    Cheers,

    Mat

    The input, output and the working template can be found here.

    (The security issue you might see when clicking the link comes from the server certificate being self-signed. You can accept a temporal exception. Btw : The ridiculous file size of the output file will be the next nut to crack. Probably s.t. about compression.)

  • ffmpeg : How can a MOV with transparent background be created ?

    25 mars 2017, par Mat

    I’m trying - with no success at all - to convert the green pixels of a background into transparent ones and output the result as clip with ffmpeg. N.b. I do not want to lay the clip over anything ; I’m not having a problem with that. What I want is a clip with transparent background for the OpenShot video editor (the chromakey filter of which doesn’t work satisfyingly).

    What I have tried (amongst 1 zillion other things over the last 15 hrs.) was

    ffmpeg.exe -i in.mov -vf chromakey=0x008001:0.115:0.0 -c:v qtrle out.mov

    but the pixels simply would not be transparent. Seemingly, nothing happens. I reckon the filter is ok, because it works fine in a complex chain (overlaying a background image).

    The output of ffprompt -show_stream -show_format of out.mov is as follows :

    [STREAM]
    
index=0
    
codec_name=qtrle
    
codec_long_name=QuickTime Animation (RLE) video
    
profile=unknown
    
codec_type=video
    
codec_time_base=1/30
    
codec_tag_string=rle
    
codec_tag=0x20656c72
    
width=1920
    
height=1080
    
coded_width=1920
    
coded_height=1080
    
has_b_frames=0
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=16:9
    
pix_fmt=bgra
    
level=-99
    
color_range=N/A
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=unspecified
    
field_order=progressive
    
timecode=N/A
    
refs=1
    
id=N/A
    
r_frame_rate=30/1
    
avg_frame_rate=30/1
    
time_base=1/15360
    
start_pts=0
    
start_time=0.000000
    
duration_ts=54789
    
duration=3.566992
    
bit_rate=822383192
    
max_bit_rate=N/A
    
bits_per_raw_sample=N/A
    
nb_frames=107
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
TAG:encoder=Lavc57.64.101 qtrle
    
[/STREAM]
    
[STREAM]
    
index=1
    
codec_name=aac
    
codec_long_name=AAC (Advanced Audio Coding)
    
profile=LC
    
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=926
    
start_time=0.020998
    
duration_ts=157481
    
duration=3.570998
    
bit_rate=132103
    
max_bit_rate=132103
    
bits_per_raw_sample=N/A
    
nb_frames=153
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
[/STREAM]
    
[FORMAT]
    
filename=out.mov
    
nb_streams=2
    
nb_programs=0
    
format_name=mov,mp4,m4a,3gp,3g2,mj2
    
format_long_name=QuickTime / MOV
    
start_time=0.000000
    
duration=3.567000
    
size=366708874
    
bit_rate=822447712
    
probe_score=100
    
TAG:major_brand=qt
    
TAG:minor_version=512
    
TAG:compatible_brands=qt
    
TAG:encoder=Lavf57.56.101
    
[/FORMAT]

    I have a "sample" clip which shows the behaviour I want, with the following stream and information :

    [STREAM]
    
index=0
    
codec_name=qtrle
    
codec_long_name=QuickTime Animation (RLE) video
    
profile=unknown
    
codec_type=video
    
codec_time_base=1/24
    
codec_tag_string=rle
    
codec_tag=0x20656c72
    
width=1920
    
height=1080
    
coded_width=1920
    
coded_height=1080
    
has_b_frames=0
    
sample_aspect_ratio=0:1
    
display_aspect_ratio=0:1
    
pix_fmt=bgra
    
level=-99
    
color_range=N/A
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=unspecified
    
field_order=progressive
    
timecode=N/A
    
refs=1
    
id=N/A
    
r_frame_rate=24/1
    
avg_frame_rate=24/1
    
time_base=1/12288
    
start_pts=0
    
start_time=0.000000
    
duration_ts=74760
    
duration=6.083984
    
bit_rate=49226848
    
max_bit_rate=N/A
    
bits_per_raw_sample=N/A
    
nb_frames=146
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
TAG:encoder=Lavc57.24.102 qtrle
    
[/STREAM]
    
[STREAM]
    
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=0.000000
    
duration_ts=293856
    
duration=6.122000
    
bit_rate=53537
    
max_bit_rate=128000
    
bits_per_raw_sample=N/A
    
nb_frames=288
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
DISPOSITION:timed_thumbnails=0
    
TAG:language=eng
    
TAG:handler_name=DataHandler
    
[/STREAM]
    
[FORMAT]
    
filename=templateOK.mov
    
nb_streams=2
    
nb_programs=0
    
format_name=mov,mp4,m4a,3gp,3g2,mj2
    
format_long_name=QuickTime / MOV
    
start_time=0.000000
    
duration=6.144000
    
size=37478506
    
bit_rate=48800138
    
probe_score=100
    
TAG:major_brand=qt
    
TAG:minor_version=512
    
TAG:compatible_brands=qt
    
TAG:encoder=Lavf57.25.100
    
[/FORMAT]

    and I simply am not able to spot the relevant difference.

    The input, output and the working template can be found here.

    (The security issue you might see when clicking the link comes from the server certificate being self-signed. You can accept a temporal exception. Btw : The ridiculous file size of the output file will be the next nut to crack. Probably something about compression.)

  • checkasm/rv40dsp : cover more cases

    5 décembre 2024, par sunyuechi
    checkasm/rv40dsp : cover more cases

    Co-Authored-By : Ronald S. Bultje <rsbultje@gmail.com>
    
Signed-off-by : Ronald S. Bultje <rsbultje@gmail.com>
    • [DH] tests/checkasm/rv40dsp.c

Navigation