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Médias (1)
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1 000 000 (wav version)
26 septembre 2011, par
Mis à jour : Avril 2013
Langue : English
Type : Audio
Autres articles (62)
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Websites made with MediaSPIP
2 mai 2011, parThis page lists some websites based on MediaSPIP.
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Installation en mode ferme
4 février 2011, parLe mode ferme permet d’héberger plusieurs sites de type MediaSPIP en n’installant qu’une seule fois son noyau fonctionnel.
C’est la méthode que nous utilisons sur cette même plateforme.
L’utilisation en mode ferme nécessite de connaïtre un peu le mécanisme de SPIP contrairement à la version standalone qui ne nécessite pas réellement de connaissances spécifique puisque l’espace privé habituel de SPIP n’est plus utilisé.
Dans un premier temps, vous devez avoir installé les mêmes fichiers que l’installation (...) -
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.
Sur d’autres sites (11839)
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how to use a video stream as input in python/opencv programme
11 juillet 2016, par vasu guptaI am able to stream and receive webcam feed in two terminal via udp
command for streaming :
ffmpeg -i /dev/video0 -b 50k -r 20 -s 858x500 -f mpegts udp://127.0.0.1:2000command for recieving :
ffplay udp://127.0.0.1:2000Now i have to use this received video stream as input in python/opencv how can i do that.
I will be doing this using rtp and rstp as well.
But in case of rtsp it is essential to initiate the receiving terminal, but if I do that then port will become busy and my program will not be able to take the feed.How could it be resolved.
I am currently using opencv 2.4.13, python 2.7 in ubuntu 14.04 -
Using FFmpeg to encode 2pass mp4
30 juin 2016, par Erin.YangI am trying to use FFmpeg to encode my 4K mp4 file to a 2pass 265 mp4 file for the purposes of testing. I am new to video compression and hope I’m making a simple mistake that someone can correct.
All infos in command line as below :
C:\Ying\FF>C:\Ying\FF\ffmpeg.exe -y -i C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4 -preset veryslow -x265-params pass=1 -vcodec hevc -b:v 15M -acodec libvo
_aacenc -b:a 128K C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4
ffmpeg version N-74286-ge5774f2 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.3 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontco
nfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-l
ibfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-am
rwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-lib
twolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --en
able-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
libavutil 54. 30.100 / 54. 30.100
libavcodec 56. 57.100 / 56. 57.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 32.100 / 5. 32.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Duration: 00:00:50.01, start: 0.000000, bitrate: 11067 kb/s
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], 11492 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (de
fault)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s
Metadata:
handler_name : SubtitleHandler
x265 [info]: HEVC encoder version 1.7
x265 [info]: build info [Windows][GCC 4.9.2][64 bit] 8bpp
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
x265 [info]: Main profile, Level-5 (Main tier)
x265 [info]: Thread pool created using 32 threads
x265 [info]: frame threads / pool features : 8 / wpp(34 rows)
x265 [info]: Coding QT: max CU size, min CU size : 64 / 8
x265 [info]: Residual QT: max TU size, max depth : 32 / 3 inter / 3 intra
x265 [info]: ME / range / subpel / merge : dia / 57 / 2 / 1
x265 [info]: Keyframe min / max / scenecut : 25 / 250 / 40
x265 [info]: Lookahead / bframes / badapt : 40 / 8 / 2
x265 [info]: b-pyramid / weightp / weightb / refs: 1 / 1 / 1 / 1
x265 [info]: AQ: mode / str / qg-size / cu-tree : 1 / 1.0 / 64 / 1
x265 [info]: Rate Control / qCompress : ABR-15000 kbps / 0.60
x265 [info]: tools: rd=2 psy-rd=0.30 rdoq=2 psy-rdoq=1.00 early-skip signhide
x265 [info]: tools: tmvp b-intra fast-intra strong-intra-smoothing deblock sao
x265 [info]: tools: stats-write
Output #0, mp4, to 'C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: hevc (libx265) ([35][0][0][0] / 0x0023), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], q=2-31, 15000 kb/s, 30 fps, 15360 tbn, 30
tbc (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.57.100 libx265
Stream #0:1(und): Audio: aac (libvo_aacenc) ([64][0][0][0] / 0x0040), 48000 Hz, stereo, s16, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.57.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
Press [q] to stop, [?] for help
frame= 1502 fps=2.6 q=-0.0 Lsize= 100652kB time=00:00:50.01 bitrate=16485.9kbits/s dup=75 drop=0
video:99814kB audio:782kB subtitle:0kB other streams:0kB global headers:1kB muxing overhead: 0.054657%
x265 [info]: frame I: 11, Avg QP:13.26 kb/s: 59293.48
x265 [info]: frame P: 443, Avg QP:15.21 kb/s: 33977.10
x265 [info]: frame B: 1048, Avg QP:18.35 kb/s: 8420.64
x265 [info]: global : 1502, Avg QP:17.39 kb/s: 16330.84
x265 [info]: Weighted P-Frames: Y:4.5% UV:4.5%
x265 [info]: Weighted B-Frames: Y:1.9% UV:1.6%
x265 [info]: consecutive B-frames: 23.8% 11.9% 14.8% 22.9% 17.8% 7.0% 0.0% 0.0% 1.8%
C:\Ying\FF>C:\Ying\FF\ffmpeg.exe -y -i C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4 -preset veryslow -x265-params pass=2 -vcodec hevc -b:v 15M -acodec libvo
_aacenc -b:a 128K C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4
ffmpeg version N-74286-ge5774f2 Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.9.3 (GCC)
configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontco
nfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libdcadec --enable-l
ibfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-am
rwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-lib
twolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --en
able-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
libavutil 54. 30.100 / 54. 30.100
libavcodec 56. 57.100 / 56. 57.100
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 32.100 / 5. 32.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'C:\Ying\FF\Xman-4K_50sec_3840x2160.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Duration: 00:00:50.01, start: 0.000000, bitrate: 11067 kb/s
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 3840x2160 [SAR 1:1 DAR 16:9], 11492 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (de
fault)
Metadata:
handler_name : VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 127 kb/s (default)
Metadata:
handler_name : SoundHandler
Stream #0:2(eng): Subtitle: mov_text (text / 0x74786574), 0 kb/s
Metadata:
handler_name : SubtitleHandler
x265 [info]: HEVC encoder version 1.7
x265 [info]: build info [Windows][GCC 4.9.2][64 bit] 8bpp
x265 [info]: using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX
x265 [info]: Main profile, Level-6 (Main tier)
x265 [info]: Thread pool created using 32 threads
x265 [info]: frame threads / pool features : 8 / wpp(34 rows)
x265 [error]: statistics are damaged at line 1495, parser out=1
[libx265 @ 0000000001e97d00] Cannot open libx265 encoder.
Output #0, mp4, to 'C:\Ying\FF\Xman-4K_3840x2160_50sec_15M_H265_veryslow_2pass.mp4':
Metadata:
major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
title : X-MEN__DAYS_OF_FUTURE_PAST.Title800
encoder : Lavf56.40.101
Chapter #0:0: start 0.000000, end 50.000000
Metadata:
title : (26)01:17:27:726
Stream #0:0(und): Video: hevc, none, q=2-31, 128 kb/s, SAR 1:1 DAR 0:0, 30 fps (default)
Metadata:
handler_name : VideoHandler
encoder : Lavc56.57.100 libx265
Stream #0:1(und): Audio: aac, 0 channels, 128 kb/s (default)
Metadata:
handler_name : SoundHandler
encoder : Lavc56.57.100 libvo_aacenc
Stream mapping:
Stream #0:0 -> #0:0 (h264 (native) -> hevc (libx265))
Stream #0:1 -> #0:1 (aac (native) -> aac (libvo_aacenc))
Error while opening encoder for output stream #0:0 - maybe incorrect parameters such as bit_rate, rate, width or heightMediaInfo :
General
Complete name : E:\4K\2ndRound\Xman-4K_50sec_3840x2160.mp4.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 66.0 MiB
Duration : 50s 6ms
Overall bit rate : 11.1 Mbps
Movie name : X-MEN__DAYS_OF_FUTURE_PAST.Title800
Writing application : Lavf56.40.101
Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 47s 567ms
Bit rate : 11.5 Mbps
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.046
Stream size : 65.2 MiB (99%)
Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 50s 6ms
Bit rate mode : Constant
Bit rate : 128 Kbps
Channel(s) : 2 channels
Channel positions : Front: L R
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 781 KiB (1%)
Menu #1
ID : 3
Codec ID : text
Duration : 50s 0ms
Language : English
Menu #2
00:00:00.000 : (26)01:17:27:726
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seeking with av_seek_frame returns invalid data
27 juin 2016, par mtadmkBased on dranger tutorial I’m trying to implement seeking in video file. Problem is with seeking to beginning milliseconds - it always returns 0 when seeking backward, or some place in file (based on file format).
I.e. with this video file and seeking forward to 500 pts there is always 6163 pts returned. Seeking backward to 500 is always returning 0. I have no idea why.
Code to do this :
import java.util.Arrays;
import java.util.List;
import org.bytedeco.javacpp.BytePointer;
import org.bytedeco.javacpp.DoublePointer;
import org.bytedeco.javacpp.PointerPointer;
import org.bytedeco.javacpp.avcodec;
import org.bytedeco.javacpp.avformat;
import org.bytedeco.javacpp.avutil;
import org.bytedeco.javacpp.swscale;
import static org.bytedeco.javacpp.avcodec.av_free_packet;
import static org.bytedeco.javacpp.avcodec.avcodec_close;
import static org.bytedeco.javacpp.avcodec.avcodec_decode_video2;
import static org.bytedeco.javacpp.avcodec.avcodec_find_decoder;
import static org.bytedeco.javacpp.avcodec.avcodec_flush_buffers;
import static org.bytedeco.javacpp.avcodec.avcodec_open2;
import static org.bytedeco.javacpp.avcodec.avpicture_fill;
import static org.bytedeco.javacpp.avcodec.avpicture_get_size;
import static org.bytedeco.javacpp.avformat.AVSEEK_FLAG_BACKWARD;
import static org.bytedeco.javacpp.avformat.av_dump_format;
import static org.bytedeco.javacpp.avformat.av_read_frame;
import static org.bytedeco.javacpp.avformat.av_register_all;
import static org.bytedeco.javacpp.avformat.av_seek_frame;
import static org.bytedeco.javacpp.avformat.avformat_close_input;
import static org.bytedeco.javacpp.avformat.avformat_find_stream_info;
import static org.bytedeco.javacpp.avformat.avformat_open_input;
import static org.bytedeco.javacpp.avutil.AVMEDIA_TYPE_VIDEO;
import static org.bytedeco.javacpp.avutil.AV_PIX_FMT_RGB24;
import static org.bytedeco.javacpp.avutil.AV_TIME_BASE;
import static org.bytedeco.javacpp.avutil.av_frame_alloc;
import static org.bytedeco.javacpp.avutil.av_frame_get_best_effort_timestamp;
import static org.bytedeco.javacpp.avutil.av_free;
import static org.bytedeco.javacpp.avutil.av_make_q;
import static org.bytedeco.javacpp.avutil.av_malloc;
import static org.bytedeco.javacpp.avutil.av_q2d;
import static org.bytedeco.javacpp.avutil.av_rescale_q;
import static org.bytedeco.javacpp.swscale.SWS_BILINEAR;
import static org.bytedeco.javacpp.swscale.sws_getContext;
import static org.bytedeco.javacpp.swscale.sws_scale;
public class SeekTest1 {
private avformat.AVFormatContext videoFile;
private final avcodec.AVPacket framePacket = new avcodec.AVPacket();
private avcodec.AVCodecContext videoCodec;
private avutil.AVFrame yuvFrame;
private swscale.SwsContext scalingContext;
private avutil.AVFrame rgbFrame;
private int streamId;
private long lastTime;
public static void main(String[] args) {
if (args.length > 0) {
new SeekTest1().start(args[0]);
} else {
new SeekTest1().start("/path/to/file");
}
}
private void start(String path) {
init(path);
//test for forward
// List<integer> seekPos = Arrays.asList(0, 100, 0, 200, 0, 300, 0, 400, 0, 500, 0, 600, 0, 700);
//test for backward
List<integer> seekPos = Arrays.asList(10000, 8000, 10000, 7000, 10000, 6000, 10000, 4000, 10000, 2000, 10000, 1000, 10000, 200);
seekPos.forEach(seekPosition -> {
readFrame();
seek(seekPosition);
});
readFrame();
cleanUp();
}
long seek(long seekPosition) {
final avutil.AVRational timeBase = fetchTimeBase();
long timeInBaseUnit = fetchTimeInBaseUnit(seekPosition, timeBase);
//changing flag to AVSEEK_FLAG_ANY does not change behavior
int flag = 0;
if (timeInBaseUnit < lastTime) {
flag = AVSEEK_FLAG_BACKWARD;
System.out.println("seeking backward to " + timeInBaseUnit);
} else {
System.out.println("seeking forward to " + timeInBaseUnit);
}
avcodec_flush_buffers(videoCodec);
av_seek_frame(videoFile, streamId, timeInBaseUnit, flag);
return timeInBaseUnit;
}
private long fetchTimeInBaseUnit(long seekPositionMillis, avutil.AVRational timeBase) {
return av_rescale_q((long) (seekPositionMillis / 1000.0 * AV_TIME_BASE), av_make_q(1, AV_TIME_BASE), timeBase);
}
private void readFrame() {
while (av_read_frame(videoFile, framePacket) >= 0) {
if (framePacket.stream_index() == streamId) {
// Decode video frame
final int[] frameFinished = new int[1];
avcodec_decode_video2(this.videoCodec, yuvFrame, frameFinished, framePacket);
if (frameFinished[0] != 0) {
av_free_packet(framePacket);
long millis = produceFinishedFrame();
System.out.println("produced time " + millis);
break;
}
}
av_free_packet(framePacket);
}
}
private long produceFinishedFrame() {
sws_scale(scalingContext, yuvFrame.data(), yuvFrame.linesize(), 0,
videoCodec.height(), rgbFrame.data(), rgbFrame.linesize());
final long pts = av_frame_get_best_effort_timestamp(yuvFrame);
final double timeBase = av_q2d(fetchTimeBase());
final long foundMillis = (long) (pts * 1000 * timeBase);
lastTime = foundMillis;
return foundMillis;
}
private avutil.AVRational fetchTimeBase() {
return videoFile.streams(streamId).time_base();
}
private void init(String videoPath) {
final avformat.AVFormatContext videoFile = new avformat.AVFormatContext(null);
av_register_all();
if (avformat_open_input(videoFile, videoPath, null, null) != 0) throw new RuntimeException("unable to open");
if (avformat_find_stream_info(videoFile, (PointerPointer) null) < 0) throw new RuntimeException("Couldn't find stream information");
av_dump_format(videoFile, 0, videoPath, 0);
final int streamId = findFirstVideoStream(videoFile);
final avcodec.AVCodecContext codec = videoFile.streams(streamId).codec();
final avcodec.AVCodec pCodec = avcodec_find_decoder(codec.codec_id());
if (pCodec == null) throw new RuntimeException("Unsupported codec");
if (avcodec_open2(codec, pCodec, (avutil.AVDictionary) null) < 0) throw new RuntimeException("Could not open codec");
final avutil.AVFrame yuvFrame = av_frame_alloc();
final avutil.AVFrame rgbFrame = av_frame_alloc();
if (rgbFrame == null) throw new RuntimeException("Can't allocate avframe");
final int numBytes = avpicture_get_size(AV_PIX_FMT_RGB24, codec.width(), codec.height());
final BytePointer frameBuffer = new BytePointer(av_malloc(numBytes));
final swscale.SwsContext swsContext = sws_getContext(codec.width(), codec.height(), codec.pix_fmt(), codec.width(), codec.height(),
AV_PIX_FMT_RGB24, SWS_BILINEAR, null, null, (DoublePointer) null);
avpicture_fill(new avcodec.AVPicture(rgbFrame), frameBuffer, AV_PIX_FMT_RGB24, codec.width(), codec.height());
this.videoFile = videoFile;
this.videoCodec = codec;
this.yuvFrame = yuvFrame;
this.scalingContext = swsContext;
this.rgbFrame = rgbFrame;
this.streamId = streamId;
}
private static int findFirstVideoStream(avformat.AVFormatContext videoFile) {
int videoStream = -1;
for (int i = 0; i < videoFile.nb_streams(); i++) {
if (videoFile.streams(i).codec().codec_type() == AVMEDIA_TYPE_VIDEO) {
videoStream = i;
break;
}
}
if (videoStream == -1) throw new RuntimeException("Didn't find video stream");
return videoStream;
}
private void cleanUp() {
av_free(this.rgbFrame);
av_free(yuvFrame);
avcodec_close(videoCodec);
avformat_close_input(videoFile);
}
}
</integer></integer>As input arg should be provided file from above.
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