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Médias (29)
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#7 Ambience
16 octobre 2011, par
Mis à jour : Juin 2015
Langue : English
Type : Audio
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#6 Teaser Music
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#5 End Title
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#3 The Safest Place
16 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#4 Emo Creates
15 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
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#2 Typewriter Dance
15 octobre 2011, par
Mis à jour : Février 2013
Langue : English
Type : Audio
Autres articles (106)
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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.
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A discussion list is available for all exchanges between users.
Sur d’autres sites (12965)
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Extract Video Frames In Python
22 avril 2017, par TheNoneI want to extract video frames and save them as image.
import os, sys
from PIL import Image
a, b, c = os.popen3("ffmpeg -i test.avi")
out = c.read()
dp = out.index("Duration: ")
duration = out[dp+10:dp+out[dp:].index(",")]
hh, mm, ss = map(float, duration.split(":"))
total = (hh*60 + mm)*60 + ss
for i in xrange(9):
t = (i + 1) * total / 10
os.system("ffmpeg -i test.avi -ss %0.3fs frame%i.png" % (t, i))But I have this error :
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
configuration: --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
Input #0, avi, from 'test.avi':
Duration: 00:00:30.5, start: 0.000000, bitrate: 465 kb/s
Stream #0.0, 25.00 fps(r): Video: mpeg4, yuv420p, 640x480
Stream #0.1: Audio: mp3, 32000 Hz, mono, 32 kb/s
Unable for find a suitable output format for 'frame0.png'Edit : ffmpeg -formats
FFmpeg version CVS, Copyright (c) 2000-2004 Fabrice Bellard
Mac OSX universal build for ffmpegX
configuration: --enable-memalign-hack --enable-mp3lame --enable-gpl --disable-vhook --disable-ffplay --disable-ffserver --enable-a52 --enable-xvid --enable-faac --enable-faad --enable-amr_nb --enable-amr_wb --enable-pthreads --enable-x264
libavutil version: 49.0.0
libavcodec version: 51.9.0
libavformat version: 50.4.0
built on Apr 15 2006 04:58:19, gcc: 4.0.1 (Apple Computer, Inc. build 5250)
File formats:
E 3g2 3gp2 format
E 3gp 3gp format
D 4xm 4X Technologies format
D RoQ Id RoQ format
D aac ADTS AAC
DE ac3 raw ac3
E adts ADTS AAC
DE aiff Audio IFF
DE alaw pcm A law format
DE amr 3gpp amr file format
DE asf asf format
E asf_stream asf format
DE au SUN AU Format
DE avi avi format
D avs avs format
E crc crc testing format
D daud D-Cinema audio format
D dts raw dts
DE dv DV video format
E dvd MPEG2 PS format (DVD VOB)
D ea Electronic Arts Multimedia Format
DE ffm ffm format
D film_cpk Sega FILM/CPK format
D flic FLI/FLC/FLX animation format
DE flv flv format
E framecrc framecrc testing format
DE gif GIF Animation
DE h261 raw h261
DE h263 raw h263
DE h264 raw H264 video format
D idcin Id CIN format
DE image image sequence
DE image2 image2 sequence
DE image2pipe piped image2 sequence
DE imagepipe piped image sequence
D ingenient Ingenient MJPEG
D ipmovie Interplay MVE format
DE m4v raw MPEG4 video format
D matroska Matroska file format
DE mjpeg MJPEG video
D mm American Laser Games MM format
DE mmf mmf format
E mov mov format
D mov,mp4,m4a,3gp,3g2,mj2 QuickTime/MPEG4/Motion JPEG 2000 format
E mp2 MPEG audio layer 2
DE mp3 MPEG audio layer 3
E mp4 mp4 format
DE mpeg MPEG1 System format
E mpeg1video MPEG video
E mpeg2video MPEG2 video
DE mpegts MPEG2 transport stream format
D mpegvideo MPEG video
E mpjpeg Mime multipart JPEG format
DE mulaw pcm mu law format
D nsv NullSoft Video format
E null null video format
DE nut nut format
D nuv NuppelVideo format
D ogg Ogg
E psp psp mp4 format
D psxstr Sony Playstation STR format
DE rawvideo raw video format
D redir Redirector format
DE rm rm format
E rtp RTP output format
D rtsp RTSP input format
DE s16be pcm signed 16 bit big endian format
DE s16le pcm signed 16 bit little endian format
DE s8 pcm signed 8 bit format
D sdp SDP
D shn raw shorten
D smk Smacker Video
D sol Sierra SOL Format
E svcd MPEG2 PS format (VOB)
DE swf Flash format
D tta true-audio
DE u16be pcm unsigned 16 bit big endian format
DE u16le pcm unsigned 16 bit little endian format
DE u8 pcm unsigned 8 bit format
E vcd MPEG1 System format (VCD)
D vmd Sierra VMD format
E vob MPEG2 PS format (VOB)
DE voc Creative Voice File format
DE wav wav format
D wc3movie Wing Commander III movie format
D wsaud Westwood Studios audio format
D wsvqa Westwood Studios VQA format
DE yuv4mpegpipe YUV4MPEG pipe format
Image formats (filename extensions, if any, follow):
DE gif gif
Codecs:
D V 4xm
D V D 8bps
DEA aac
D V D aasc
DEA ac3
DEA adpcm_4xm
DEA adpcm_adx
DEA adpcm_ct
DEA adpcm_ea
DEA adpcm_ima_dk3
DEA adpcm_ima_dk4
DEA adpcm_ima_qt
DEA adpcm_ima_smjpeg
DEA adpcm_ima_wav
DEA adpcm_ima_ws
DEA adpcm_ms
DEA adpcm_sbpro_2
DEA adpcm_sbpro_3
DEA adpcm_sbpro_4
DEA adpcm_swf
DEA adpcm_xa
DEA adpcm_yamaha
D A alac
DEA amr_nb
DEA amr_wb
DEV D asv1
DEV D asv2
D V D avs
D V bmp
D V D camstudio
D V D camtasia
D V D cinepak
D V D cljr
D A cook
D V D cyuv
DES dvbsub
DES dvdsub
DEV D dvvideo
DEV D ffv1
DEVSD ffvhuff
D A flac
D V D flic
DEVSD flv
D V D fraps
DEA g726
DEV D h261
DEVSDT h263
D VSD h263i
EV h263p
DEV DT h264
DEVSD huffyuv
D V D idcinvideo
D V D indeo2
D V indeo3
D A interplay_dpcm
D V D interplayvideo
EV jpegls
D V kmvc
EV ljpeg
D V D loco
D A mace3
D A mace6
D V D mdec
DEV D mjpeg
D V D mjpegb
D V D mmvideo
DEA mp2
DEA mp3
D A mp3adu
D A mp3on4
DEVSDT mpeg1video
DEVSDT mpeg2video
DEVSDT mpeg4
D A mpeg4aac
D VSDT mpegvideo
DEVSD msmpeg4
DEVSD msmpeg4v1
DEVSD msmpeg4v2
D V D msrle
D V D msvideo1
D V D mszh
D V D nuv
DEV pam
DEV pbm
DEA pcm_alaw
DEA pcm_mulaw
DEA pcm_s16be
DEA pcm_s16le
DEA pcm_s24be
DEA pcm_s24daud
DEA pcm_s24le
DEA pcm_s32be
DEA pcm_s32le
DEA pcm_s8
DEA pcm_u16be
DEA pcm_u16le
DEA pcm_u24be
DEA pcm_u24le
DEA pcm_u32be
DEA pcm_u32le
DEA pcm_u8
DEV pgm
DEV pgmyuv
DEV png
DEV ppm
D A qdm2
D V D qdraw
D V D qpeg
D V D qtrle
DEV rawvideo
D A real_144
D A real_288
D A roq_dpcm
D V D roqvideo
D V D rpza
DEV D rv10
DEV D rv20
D A shorten
D A smackaud
D V smackvid
D V D smc
DEV snow
D A sol_dpcm
DEA sonic
EA sonicls
D V D sp5x
DEV D svq1
D VSD svq3
D V theora
D V D truemotion1
D V D truemotion2
D A truespeech
D A tta
D V D ultimotion
D V vc9
D V D vcr1
D A vmdaudio
D V D vmdvideo
D A vorbis
D V vp3
D V D vqavideo
D A wmav1
D A wmav2
DEVSD wmv1
DEVSD wmv2
D V D wnv1
D A ws_snd1
D A xan_dpcm
D V D xan_wc3
D V D xl
EV xvid
DEV D zlib
D V zmbv
Supported file protocols:
file: pipe: udp: rtp: tcp: http:
Frame size, frame rate abbreviations:
ntsc pal qntsc qpal sntsc spal film ntsc-film sqcif qcif cif 4cif
Motion estimation methods:
zero(fastest) full(slowest) log phods epzs(default) x1 hex umh iter
Note, the names of encoders and decoders dont always match, so there are
several cases where the above table shows encoder only or decoder only entries
even though both encoding and decoding are supported for example, the h263
decoder corresponds to the h263 and h263p encoders, for file formats its even
worseWhat is wrong in my code ? Thanks in advance
-
how to make the script re-ask for the input again after failure ?
6 avril 2022, par Rami Magdithis some script for ffmpeg that i added to windows context menu
so i just copy paste what i want done
when this .bat fails [wrong argument for instance ] it closes and i have to restart it
how to make the script re-ask for the input again after failure ?


@echo off
echo -------------------------------------------------------------
echo FILTERS
echo -------------------------------------------------------------
echo,
echo VERTICAL FLIP= -lavfi vflip
echo HORIZONTAL FLIP= -lavfi hflip
echo NEGAT COLORS= -lavfi Enegate
echo NEGATE LUMINANCE= -lavfi lutyuv=y=negval
echo GRAYSCALE= -lavfi hue=s=0
echo ISOLATE COLOR= -lavfi colorhold=color="orange":similarity=0.29:blend=0
echo PS CURVES PRESET= -lavfi curves=psfile='MyCurvesPresets/purple.acv'
echo VIGNETTE EFFECT= -lavfi vignette=PI/4
echo LOOKUP TABLE= -lavfi lut3d=c\\:/nnn/ggg.cube
echo SPEED UP OR SLOW DOWN= -lavfi setpts=PTS/2
echo SPEED UP VIDEOS, AUDIOS= -lavfi "[0:v]setpts=PTS/2[v];[0:a]atempo=2.0[a]" -map "[v]" -map "[a]"
echo REVERSE= -lavfi reverse
echo POSTERIZE= -lavfi elbg=l=8:n=1
echo MOTION BLUR= -lavfi tmix=frames=20:weights="10 1 1"
echo HARD SUB= -lavfi subtitles=s.ass
echo SOFT SUB= -scodec mov_text -metadata:s:s:0 language=eng
echo ONE IMAGE= -lavfi -frames 1
echo AN IMAGE EVERY 60 SEC= -lavfi fps=1/60
echo ONLY IFRAMES= -skip_frame nokey
echo GIF= -lavfi "fps=10,scale=320:-2:flags=lanczos,split[s0][s1];[s0]palettegen[p];[s1][p]paletteuse" -loop 0
echo STACKS= -lavfi "[0:v][1:v][2:v][3:v]xstack=inputs=4:layout=0_0|w0_0|0_h0|w0_h0[v]" -map "[v]"
echo EMBED THUMBNAIL = -i 1.jpg -map 0:0 -map 0:1 -map 1 -c:0 copy -c:v:1 png -disposition:v:1 attached_pic
ECHO,
echo -------------------------------------------------------------
echo CODEC OPTIONS
echo -------------------------------------------------------------
echo,
echo -lavfi "[0:v]scale=-2:720,setpts=PTS/1.5[v];[0:a]atempo=1.5[a]" -map "[v]" -map "[a]" -crf 40 -preset ultrafast
echo -map 0 -codec copy
echo -acodec copy -vcodec libx264 -vsync cfr -crf 20 -pix_fmt yuv420p -tune film -preset veryfast -movflags +faststart
echo -acodec aac -ac 2 -ab 128k -ar 44100 / -acodec libmp3lame -ab 320k -ar 44100 -id3v2_version 3 
echo -qscale:v 2
echo,


the main part :


set /P extra="ENTER CODEC OPTIONS="

echo,
echo Processing "%~nx1"
echo Output will be "%~n1"_output.mp4"
ffmpeg -v error -stats -y -i "%~1" %extra% "%~n1"_output.mp4
pause


-
After ffmpeg encode, AVPacket pts and dts is AV_NOPTS_VALUE
29 novembre 2017, par Li ZehanI would like to ask a question about ffmpeg when i use encoder (x264).
this is my code :
int
FFVideoEncoder::init(AVCodecID codecId, int bitrate, int fps, int gopSize,
int width, int height, AVPixelFormat format) {
release();
const AVCodec *codec = avcodec_find_encoder(codecId);
m_pCodecCtx = avcodec_alloc_context3(codec);
m_pCodecCtx->width = width;
m_pCodecCtx->height = height;
m_pCodecCtx->pix_fmt = format;
m_pCodecCtx->bit_rate = bitrate;
m_pCodecCtx->thread_count = 5;
m_pCodecCtx->max_b_frames = 0;
m_pCodecCtx->gop_size = gopSize;
m_pCodecCtx->time_base.num = 1;
m_pCodecCtx->time_base.den = fps;
//H.264
if (m_pCodecCtx->codec_id == AV_CODEC_ID_H264) {
// av_dict_set(&opts, "preset", "slow", 0);
av_dict_set(&m_pEncoderOpts, "preset", "superfast", 0);
av_dict_set(&m_pEncoderOpts, "tune", "zerolatency", 0);
m_pCodecCtx->flags |= CODEC_FLAG_GLOBAL_HEADER;
m_pCodecCtx->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
}
int ret = avcodec_open2(m_pCodecCtx, m_pCodecCtx->codec, &m_pEncoderOpts);
if (ret == 0) {
LOGI("open avcodec success!");
} else {
LOGE("open avcodec error!");
return -1;
}
return ret;
}
int FFVideoEncoder::encode(const Frame &inFrame, AVPacket *outPacket) {
AVFrame *frame = av_frame_alloc();
// avpicture_fill((AVPicture *) frame, inFrame.getData(), AV_PIX_FMT_YUV420P, inFrame.getWidth(),
// inFrame.getHeight());
av_image_fill_arrays(frame->data, frame->linesize, inFrame.getData(), m_pCodecCtx->pix_fmt,
inFrame.getWidth(), inFrame.getHeight(), 1);
int ret = 0;
ret = avcodec_send_frame(m_pCodecCtx, frame);
if (ret != 0) {
LOGE("send frame error! %s", av_err2str(ret));
} else {
ret = avcodec_receive_packet(m_pCodecCtx, outPacket);
LOGI("extract data size = %d", m_pCodecCtx->extradata_size);
if (ret != 0) {
LOGE("receive packet error! %s", av_err2str(ret));
}
};
av_frame_free(&frame);
return ret;
}I expect that the AVPacket will carry the pts and dts about this frame.
but in fact, i only can get encoded frame data and size.
//====================================
except this question, i have another quesiont :
x264 docs say that "tune" opts can be set like film、animation and others. but i only can get a normal video when i set "zerolatency" params. When i set others opts, video’s bitrate is very low.
Thanks your answer.
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