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Médias (2)
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Valkaama DVD Label
4 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Image
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Podcasting Legal guide
16 mai 2011, par
Mis à jour : Mai 2011
Langue : English
Type : Texte
Autres articles (100)
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Multilang : améliorer l’interface pour les blocs multilingues
18 février 2011, parMultilang est un plugin supplémentaire qui n’est pas activé par défaut lors de l’initialisation de MediaSPIP.
Après son activation, une préconfiguration est mise en place automatiquement par MediaSPIP init permettant à la nouvelle fonctionnalité d’être automatiquement opérationnelle. Il n’est donc pas obligatoire de passer par une étape de configuration pour cela. -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
5 mars 2010, parLe site central/maître de la ferme a besoin d’utiliser plusieurs plugins supplémentaires vis à vis des canaux pour son bon fonctionnement. le plugin Gestion de la mutualisation ; le plugin inscription3 pour gérer les inscriptions et les demandes de création d’instance de mutualisation dès l’inscription des utilisateurs ; le plugin verifier qui fournit une API de vérification des champs (utilisé par inscription3) ; le plugin champs extras v2 nécessité par inscription3 (...)
Sur d’autres sites (9781)
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Rescaling and slowing down a movie at the same time with ffmpeg
21 décembre 2016, par ejl62I would like with ffmpeg to slow down a movie I am creating using the flag :
-filter:v "setpts=2.0*PTS"
However the height of my still images is not divisible by 2, so to avoid the error :
height not divisible by 2 (1238x833)
, I am using the flag :-vf scale="trunc(iw/2)*2:trunc(ih/2)*2"
(I also tried
-vf scale=1238:-2
).When I do this the film is generated but it isn’t slowed down, like if the
-filter:v "setpts=2.0*PTS"
wasn’t there.Is there something particular to do in order to have both option working at the same time ?
Here is the complete command I am using :
ffmpeg -an -i ./movie/cphmd1.%05d.ppm -vcodec libx264 -pix_fmt yuv420p -b:v 5000k -r 24 -crf 18 -filter:v "setpts=2.0*PTS" -vf scale="trunc(iw/2)*2:trunc(ih/2)*2" -preset slow -f mp4 cphmd1_slower.mp4
Many thanks in advance !
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Reducing the bit rate is dropping the audio stream [closed]
19 février 2013, par user977505I'm a newbie to the ffmpeg, x264 commands and conversion. So please bear w/ me.
I've a H.264 content w/ very high bit rate and I'm using ffmepg, x264 commands to reduce the bit rate. The bit rate is getting reduced but the problem is the output doesn't have the audio stream anymore.
Here are the commands, I'm using :
ffmpeg.exe -i King_Maker_Leader.mp4 -pix_fmt yuv420p -vf scale=1024:576 -r 24 \ -f yuv4mpegpipe - | x264.exe —bitrate 1664 —demuxer y4m \ —preset slow —ref 3 —threads 6 —thread-input —no-scenecut \ —no-interlaced —stats King_Maker_Leader.stats —vbv-bufsize 3328000 \ —vbv-maxrate 1996 —pass 1 —output NUL —profile main —level 3.1 —sar 1:1 \ —tune film —keyint 96 -
ffmpeg.exe -i King_Maker_Leader.mp4 -pix_fmt yuv420p -vf scale=1024:576 \
-r 24 -f yuv4mpegpipe - | x264.exe —bitrate 1664 —demuxer y4m \
—preset slow —ref 3 —threads 6 —thread-input —no-scenecut \
—no-interlaced —stats King_Maker_Leader.stats —vbv-bufsize 3328000 \
—vbv-maxrate 1996 —pass 2 —output King_Maker_Leader_generated.mp4 \
—profile main —level 3.1 —sar 1:1 —tune film —keyint 96 -I cannot figure out what is wrong with the above commands.
I'm attaching the partial logs from pass 2 command that show the input has two streams (video and audio) and the output has only video stream.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '..\yathrakkarude_sathruka.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.6.101
Duration: 00:01:00.37, start: 0.000000, bitrate: 8587 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 720x576 [
SAR 16:11 DAR 20:11], 8073 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 508
kb/s
Metadata:
handler_name : SoundHandler
Output #0, yuv4mpegpipe, to 'pipe:':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.25.104
Stream #0:0(eng): Video: rawvideo (I420 / 0x30323449), yuv420p, 1024x576 [SA
R 45:44 DAR 20:11], q=2-31, 200 kb/s, 90k tbn, 24 tbc
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> rawvideo)
Press [q] to stop, [?] for help
[yuv4mpegpipe @ 016d5800] Encoder did not produce proper pts, making some up.
y4m [info]: 1024x576p 45:44 @ 24/1 fps (cfr)
x264 [info]: using SAR=1/1
x264 [warning]: VBV buffer (2000000) > level limit (14000)
x264 [info]: using cpu capabilities: MMX2 SSE2Fast FastShuffle SSEMisalign LZCNT -
Reducing the bit rate is dropping the audio stream [closed]
19 février 2013, par user977505I'm a newbie to the ffmpeg, x264 commands and conversion. So please bear w/ me.
I've a H.264 content w/ very high bit rate and I'm using ffmepg, x264 commands to reduce the bit rate. The bit rate is getting reduced but the problem is the output doesn't have the audio stream anymore.
Here are the commands, I'm using :
ffmpeg.exe -i King_Maker_Leader.mp4 -pix_fmt yuv420p -vf scale=1024:576 -r 24 \ -f yuv4mpegpipe - | x264.exe —bitrate 1664 —demuxer y4m \ —preset slow —ref 3 —threads 6 —thread-input —no-scenecut \ —no-interlaced —stats King_Maker_Leader.stats —vbv-bufsize 3328000 \ —vbv-maxrate 1996 —pass 1 —output NUL —profile main —level 3.1 —sar 1:1 \ —tune film —keyint 96 -
ffmpeg.exe -i King_Maker_Leader.mp4 -pix_fmt yuv420p -vf scale=1024:576 \
-r 24 -f yuv4mpegpipe - | x264.exe —bitrate 1664 —demuxer y4m \
—preset slow —ref 3 —threads 6 —thread-input —no-scenecut \
—no-interlaced —stats King_Maker_Leader.stats —vbv-bufsize 3328000 \
—vbv-maxrate 1996 —pass 2 —output King_Maker_Leader_generated.mp4 \
—profile main —level 3.1 —sar 1:1 —tune film —keyint 96 -I cannot figure out what is wrong with the above commands.
I'm attaching the partial logs from pass 2 command that show the input has two streams (video and audio) and the output has only video stream.
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '..\yathrakkarude_sathruka.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.6.101
Duration: 00:01:00.37, start: 0.000000, bitrate: 8587 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 720x576 [
SAR 16:11 DAR 20:11], 8073 kb/s, 25 fps, 25 tbr, 25k tbn, 50 tbc
Metadata:
handler_name : VideoHandler
Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, s16, 508
kb/s
Metadata:
handler_name : SoundHandler
Output #0, yuv4mpegpipe, to 'pipe:':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf54.25.104
Stream #0:0(eng): Video: rawvideo (I420 / 0x30323449), yuv420p, 1024x576 [SA
R 45:44 DAR 20:11], q=2-31, 200 kb/s, 90k tbn, 24 tbc
Metadata:
handler_name : VideoHandler
Stream mapping:
Stream #0:0 -> #0:0 (h264 -> rawvideo)
Press [q] to stop, [?] for help
[yuv4mpegpipe @ 016d5800] Encoder did not produce proper pts, making some up.
y4m [info]: 1024x576p 45:44 @ 24/1 fps (cfr)
x264 [info]: using SAR=1/1
x264 [warning]: VBV buffer (2000000) > level limit (14000)
x264 [info]: using cpu capabilities: MMX2 SSE2Fast FastShuffle SSEMisalign LZCNT