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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Publier sur MédiaSpip
13 juin 2013Puis-je poster des contenus à partir d’une tablette Ipad ?
Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir -
Les formats acceptés
28 janvier 2010, parLes commandes suivantes permettent d’avoir des informations sur les formats et codecs gérés par l’installation local de ffmpeg :
ffmpeg -codecs ffmpeg -formats
Les format videos acceptés en entrée
Cette liste est non exhaustive, elle met en exergue les principaux formats utilisés : h264 : H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10 m4v : raw MPEG-4 video format flv : Flash Video (FLV) / Sorenson Spark / Sorenson H.263 Theora wmv :
Les formats vidéos de sortie possibles
Dans un premier temps on (...)
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FFMPEG Video to Audio Conversion Results in Different Durations
10 juin 2020, par Eric JI am trying to covert an MP4 file into a mono WAV file sampled at 16,000 Hz.



When I run below code, the duration goes from 00:09:59.99 (MP4) to 00:09:57.64 (WAV). Its original, longer version goes from 00:48:37.46 (MP4) to 00:48:23.38 (WAV).



ffmpeg -i .mp4 -ac 1 -ar 16000 .wav



I've also tried below code. The result is much worse, going from 00:09:59.99 (MP4) to 00:12:56.29 (AAC).



ffmpeg -I .mp4 -vn -acodec copy .aac



Attaching the log :



Report written to "ffmpeg-20200610-093115.log"
Command line:
ffmpeg -i short.mp4 -ac 1 -ar 16000 short.wav -report
ffmpeg version 4.1.1 Copyright (c) 2000-2019 the FFmpeg developers
 built with Apple LLVM version 10.0.0 (clang-1000.11.45.5)
 configuration: --prefix=/usr/local/Cellar/ffmpeg/4.1.1 --enable-shared --enable-pthreads --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags='-I/Library/Java/JavaVirtualMachines/openjdk-11.0.2.jdk/Contents/Home/include -I/Library/Java/JavaVirtualMachines/openjdk-11.0.2.jdk/Contents/Home/include/darwin' --host-ldflags= --enable-ffplay --enable-gnutls --enable-gpl --enable-libaom --enable-libbluray --enable-libmp3lame --enable-libopus --enable-librubberband --enable-libsnappy --enable-libtesseract --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-lzma --enable-libfontconfig --enable-libfreetype --enable-frei0r --enable-libass --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librtmp --enable-libspeex --enable-videotoolbox --disable-libjack --disable-indev=jack --enable-libaom --enable-libsoxr
 libavutil 56. 22.100 / 56. 22.100
 libavcodec 58. 35.100 / 58. 35.100
 libavformat 58. 20.100 / 58. 20.100
 libavdevice 58. 5.100 / 58. 5.100
 libavfilter 7. 40.101 / 7. 40.101
 libavresample 4. 0. 0 / 4. 0. 0
 libswscale 5. 3.100 / 5. 3.100
 libswresample 3. 3.100 / 3. 3.100
 libpostproc 55. 3.100 / 55. 3.100
Splitting the commandline.
Reading option '-i' ... matched as input url with argument 'short.mp4'.
Reading option '-ac' ... matched as option 'ac' (set number of audio channels) with argument '1'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '16000'.
Reading option 'short.wav' ... matched as output url.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url short.mp4.
Successfully parsed a group of options.
Opening an input file: short.mp4.
[NULL @ 0x7f98a3008200] Opening 'short.mp4' for reading
[file @ 0x7f98a2904440] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] ISO: File Type Major Brand: mp42
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] Processing st: 0, edit list 0 - media time: 0, duration: 7679872
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] Processing st: 1, edit list 0 - media time: 1024, duration: 26459559
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] drop a frame at curr_cts: 0 @ 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] Before avformat_find_stream_info() pos: 11213917 bytes read:318782 seeks:1 nb_streams:2
[h264 @ 0x7f98a3808800] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 0x7f98a3808800] nal_unit_type: 8(PPS), nal_ref_idc: 3
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] demuxer injecting skip 1024 / discard 0
[aac @ 0x7f98a1008c00] skip 1024 / discard 0 samples due to side data
[h264 @ 0x7f98a3808800] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 0x7f98a3808800] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 0x7f98a3808800] Format yuv420p chosen by get_format().
[h264 @ 0x7f98a3808800] Reinit context to 640x368, pix_fmt: yuv420p
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7f98a3008200] After avformat_find_stream_info() pos: 21961 bytes read:351550 seeks:2 frames:46
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'short.mp4':
 Metadata:
 major_brand : mp42
 minor_version : 1
 compatible_brands: isommp41mp42
 creation_time : 2020-06-10T16:12:17.000000Z
 Duration: 00:09:59.99, start: 0.000000, bitrate: 149 kb/s
 Stream #0:0(eng), 1, 1/12800: Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 640x360 [SAR 1:1 DAR 16:9], 47 kb/s, 25 fps, 25 tbr, 12800 tbn, 50 tbc (default)
 Metadata:
 creation_time : 2020-06-10T16:12:17.000000Z
 handler_name : Core Media Video
 Stream #0:1(eng), 45, 1/44100: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, mono, fltp, 98 kb/s (default)
 Metadata:
 creation_time : 2020-06-10T16:12:17.000000Z
 handler_name : Core Media Audio
Successfully opened the file.
Parsing a group of options: output url short.wav.
Applying option ac (set number of audio channels) with argument 1.
Applying option ar (set audio sampling rate (in Hz)) with argument 16000.
Successfully parsed a group of options.
Opening an output file: short.wav.
[file @ 0x7f98a0c1db40] Setting default whitelist 'file,crypto'
Successfully opened the file.
Stream mapping:
 Stream #0:1 -> #0:0 (aac (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[aac @ 0x7f98a100de00] skip 1024 / discard 0 samples due to side data
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
detected 12 logical cores
[graph_0_in_0_1 @ 0x7f98a0e2c4c0] Setting 'time_base' to value '1/44100'
[graph_0_in_0_1 @ 0x7f98a0e2c4c0] Setting 'sample_rate' to value '44100'
[graph_0_in_0_1 @ 0x7f98a0e2c4c0] Setting 'sample_fmt' to value 'fltp'
[graph_0_in_0_1 @ 0x7f98a0e2c4c0] Setting 'channel_layout' to value '0x4'
[graph_0_in_0_1 @ 0x7f98a0e2c4c0] tb:1/44100 samplefmt:fltp samplerate:44100 chlayout:0x4
[format_out_0_0 @ 0x7f98a0e2cb80] Setting 'sample_fmts' to value 's16'
[format_out_0_0 @ 0x7f98a0e2cb80] Setting 'sample_rates' to value '16000'
[format_out_0_0 @ 0x7f98a0e2cb80] Setting 'channel_layouts' to value '0x4'
[format_out_0_0 @ 0x7f98a0e2cb80] auto-inserting filter 'auto_resampler_0' between the filter 'Parsed_anull_0' and the filter 'format_out_0_0'
[AVFilterGraph @ 0x7f98a0c16ac0] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto_resampler_0 @ 0x7f98a0e2d540] [SWR @ 0x7f98a28e1000] Using fltp internally between filters
[auto_resampler_0 @ 0x7f98a0e2d540] ch:1 chl:mono fmt:fltp r:44100Hz -> ch:1 chl:mono fmt:s16 r:16000Hz
Output #0, wav, to 'short.wav':
 Metadata:
 major_brand : mp42
 minor_version : 1
 compatible_brands: isommp41mp42
 ISFT : Lavf58.20.100
 Stream #0:0(eng), 0, 1/16000: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 16000 Hz, mono, s16, 256 kb/s (default)
 Metadata:
 creation_time : 2020-06-10T16:12:17.000000Z
 handler_name : Core Media Audio
 encoder : Lavc58.35.100 pcm_s16le
size= 17152kB time=00:09:16.63 bitrate= 252.4kbits/s speed=1.11e+03x 
[out_0_0 @ 0x7f98a0e2c700] EOF on sink link out_0_0:default.
No more output streams to write to, finishing.
size= 18676kB time=00:09:59.99 bitrate= 255.0kbits/s speed=1.11e+03x 
video:0kB audio:18676kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.000408%
Input file #0 (short.mp4):
 Input stream #0:0 (video): 1 packets read (3689 bytes); 
 Input stream #0:1 (audio): 25739 packets read (7375414 bytes); 25738 frames decoded (26355712 samples); 
 Total: 25740 packets (7379103 bytes) demuxed
Output file #0 (short.wav):
 Output stream #0:0 (audio): 25739 frames encoded (9562163 samples); 25739 packets muxed (19124326 bytes); 
 Total: 25739 packets (19124326 bytes) muxed
25738 frames successfully decoded, 0 decoding errors
[AVIOContext @ 0x7f98a0c1dc40] Statistics: 4 seeks, 76 writeouts
[AVIOContext @ 0x7f98a29045c0] Statistics: 10902846 bytes read, 29 seeks


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ffmpeg avcodec_encode_video2 hangs when using Quick Sync h264_qsv encoder
9 juin 2020, par Mike SimpsonWhen I use the mpeg4 or h264 encoders, I am able to successfully encode images to make a valid AVI file using the API for ffmpeg 3.1.0. However, when I use the Quick Sync encoder (h264_qsv), avcodec_encode_video2 will hang some of the time. I found that when using images that are 1920x1080, it was rare that avcodec_encode_video2 would hang. When using 256x256 images, it was very likely that the function would hang.



I have created the test code below that demonstrates the hang of avcodec_encode_video2. The code will create a 1000 frame, 256x256 AVI with a bit rate of 400000. The frames are simply allocated, so the output video should just be green frames.



The problem was observed using Windows 7 and Windows 10, using the 32-bit or 64-bit test application.



If anyone has any idea on how I can avoid the avcodec_encode_video2 hang I would be very grateful ! Thanks in advance for any assistance.



extern "C"
{
#ifndef __STDC_CONSTANT_MACROS
#define __STDC_CONSTANT_MACROS
#endif
#include "avcodec.h"
#include "avformat.h"
#include "swscale.h"
#include "avutil.h"
#include "imgutils.h"
#include "opt.h"
#include 
}

#include <iostream>


// Globals
AVCodec* m_pCodec = NULL;
AVStream *m_pStream = NULL;
AVOutputFormat* m_pFormat = NULL;
AVFormatContext* m_pFormatContext = NULL;
AVCodecContext* m_pCodecContext = NULL;
AVFrame* m_pFrame = NULL;
int m_frameIndex;

// Output format
AVPixelFormat m_pixType = AV_PIX_FMT_NV12;
// Use for mpeg4
//AVPixelFormat m_pixType = AV_PIX_FMT_YUV420P;

// Output frame rate
int m_frameRate = 30;
// Output image dimensions
int m_imageWidth = 256;
int m_imageHeight = 256;
// Number of frames to export
int m_frameCount = 1000;
// Output file name
const char* m_fileName = "c:/test/test.avi";
// Output file type
const char* m_fileType = "AVI";
// Codec name used to encode
const char* m_encoderName = "h264_qsv";
// use for mpeg4
//const char* m_encoderName = "mpeg4";
// Target bit rate
int m_targetBitRate = 400000;

void addVideoStream()
{
 m_pStream = avformat_new_stream( m_pFormatContext, m_pCodec );
 m_pStream->id = m_pFormatContext->nb_streams - 1;
 m_pStream->time_base = m_pCodecContext->time_base;
 m_pStream->codec->pix_fmt = m_pixType;
 m_pStream->codec->flags = m_pCodecContext->flags;
 m_pStream->codec->width = m_pCodecContext->width;
 m_pStream->codec->height = m_pCodecContext->height;
 m_pStream->codec->time_base = m_pCodecContext->time_base;
 m_pStream->codec->bit_rate = m_pCodecContext->bit_rate;
}

AVFrame* allocatePicture( enum AVPixelFormat pix_fmt, int width, int height )
{
 AVFrame *frame;

 frame = av_frame_alloc();

 if ( !frame )
 {
 return NULL;
 }

 frame->format = pix_fmt;
 frame->width = width;
 frame->height = height;

 int checkImage = av_image_alloc( frame->data, frame->linesize, width, height, pix_fmt, 32 );

 if ( checkImage < 0 )
 {
 return NULL;
 }

 return frame;
}

bool initialize()
{
 AVRational frameRate;
 frameRate.den = m_frameRate;
 frameRate.num = 1;

 av_register_all();

 m_pCodec = avcodec_find_encoder_by_name(m_encoderName);

 if( !m_pCodec )
 {
 return false;
 }

 m_pCodecContext = avcodec_alloc_context3( m_pCodec );
 m_pCodecContext->width = m_imageWidth;
 m_pCodecContext->height = m_imageHeight;
 m_pCodecContext->time_base = frameRate;
 m_pCodecContext->gop_size = 0;
 m_pCodecContext->pix_fmt = m_pixType;
 m_pCodecContext->codec_id = m_pCodec->id;
 m_pCodecContext->bit_rate = m_targetBitRate;

 av_opt_set( m_pCodecContext->priv_data, "+CBR", "", 0 );

 return true;
}

bool startExport()
{
 m_frameIndex = 0;
 char fakeFileName[512]; 
 int checkAllocContext = avformat_alloc_output_context2( &m_pFormatContext, NULL, m_fileType, fakeFileName );

 if ( checkAllocContext < 0 )
 {
 return false;
 }

 if ( !m_pFormatContext ) 
 {
 return false;
 }

 m_pFormat = m_pFormatContext->oformat;

 if ( m_pFormat->video_codec != AV_CODEC_ID_NONE ) 
 {
 addVideoStream();

 int checkOpen = avcodec_open2( m_pCodecContext, m_pCodec, NULL );

 if ( checkOpen < 0 )
 {
 return false;
 }

 m_pFrame = allocatePicture( m_pCodecContext->pix_fmt, m_pCodecContext->width, m_pCodecContext->height ); 
 if( !m_pFrame ) 
 {
 return false;
 }
 m_pFrame->pts = 0;
 }

 int checkOpen = avio_open( &m_pFormatContext->pb, m_fileName, AVIO_FLAG_WRITE );
 if ( checkOpen < 0 )
 {
 return false;
 }

 av_dict_set( &(m_pFormatContext->metadata), "title", "QS Test", 0 );

 int checkHeader = avformat_write_header( m_pFormatContext, NULL );
 if ( checkHeader < 0 )
 {
 return false;
 }

 return true;
}

int processFrame( AVPacket& avPacket )
{
 avPacket.stream_index = 0;
 avPacket.pts = av_rescale_q( m_pFrame->pts, m_pStream->codec->time_base, m_pStream->time_base );
 avPacket.dts = av_rescale_q( m_pFrame->pts, m_pStream->codec->time_base, m_pStream->time_base );
 m_pFrame->pts++;

 int retVal = av_interleaved_write_frame( m_pFormatContext, &avPacket );
 return retVal;
}

bool exportFrame()
{
 int success = 1;
 int result = 0;

 AVPacket avPacket;

 av_init_packet( &avPacket );
 avPacket.data = NULL;
 avPacket.size = 0;

 fflush(stdout);

 std::cout << "Before avcodec_encode_video2 for frame: " << m_frameIndex << std::endl;
 success = avcodec_encode_video2( m_pCodecContext, &avPacket, m_pFrame, &result );
 std::cout << "After avcodec_encode_video2 for frame: " << m_frameIndex << std::endl;

 if( result )
 { 
 success = processFrame( avPacket );
 }

 av_packet_unref( &avPacket );

 m_frameIndex++;
 return ( success == 0 );
}

void endExport()
{
 int result = 0;
 int success = 0;

 if (m_pFrame)
 {
 while ( success == 0 )
 {
 AVPacket avPacket;
 av_init_packet( &avPacket );
 avPacket.data = NULL;
 avPacket.size = 0;

 fflush(stdout);
 success = avcodec_encode_video2( m_pCodecContext, &avPacket, NULL, &result );

 if( result )
 { 
 success = processFrame( avPacket );
 }
 av_packet_unref( &avPacket );

 if (!result)
 {
 break;
 }
 }
 }

 if (m_pFormatContext)
 {
 av_write_trailer( m_pFormatContext );

 if( m_pFrame )
 {
 av_frame_free( &m_pFrame );
 }

 avio_closep( &m_pFormatContext->pb );
 avformat_free_context( m_pFormatContext );
 m_pFormatContext = NULL;
 }
}

void cleanup()
{
 if( m_pFrame || m_pCodecContext )
 {
 if( m_pFrame )
 {
 av_frame_free( &m_pFrame );
 }

 if( m_pCodecContext )
 {
 avcodec_close( m_pCodecContext );
 av_free( m_pCodecContext );
 }
 }
}

int main()
{
 bool success = true;
 if (initialize())
 {
 if (startExport())
 {
 for (int loop = 0; loop < m_frameCount; loop++)
 {
 if (!exportFrame())
 {
 std::cout << "Failed to export frame\n";
 success = false;
 break;
 }
 }
 endExport();
 }
 else
 {
 std::cout << "Failed to start export\n";
 success = false;
 }

 cleanup();
 }
 else
 {
 std::cout << "Failed to initialize export\n";
 success = false;
 }

 if (success)
 {
 std::cout << "Successfully exported file\n";
 }
 return 1;
}
</iostream>

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avformat_open_input() error -1330794744 : Could not open input
22 mai 2014, par NavidWhen I run my code on unix (postproc removed) :
FFmpegFrameGrabber frameGrabber = new FFmpegFrameGrabber("https://.../ec769038-22d9-4da9-a7bf-dd4647f97964-353.mp4?__h__=1400667080_dfb4fabf293d258cd501ab4978419392");
IplImage capturedImage = null;
try {
frameGrabber.start();
long lengthInTime = frameGrabber.getLengthInTime();
long i = 0;
while(i < lengthInTime) {
frameGrabber.setTimestamp(i);
capturedImage = frameGrabber.grab();
// if capturedImage is null ... error
if(capturedImage == null)
break;
LOG.info("frame: " + i + " " + capturedImage.depth());
i += 10 * 1000 * 1000; // microseconds
}
frameGrabber.stop();
frameGrabber.release();
} catch (Exception e) {
LOG.error(e.getMessage());
}I get this error :
avformat_open_input() error -1330794744: Could not open input "https://.../ec769038-22d9-4da9-a7bf-dd4647f97964-353.mp4?__h__=1400667080_dfb4fabf293d258cd501ab4978419392". (Has setFormat() been called?)I am running the program in Red Hat Same code works with local file path.
I know URL works because the same code (but postproc not excluded) works in Windows.
I am using Javacv 0.5 both in Red Hat and Windows (that’s the only choice I have at work)
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