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Gestion des droits de création et d’édition des objets
8 février 2011, parPar défaut, beaucoup de fonctionnalités sont limitées aux administrateurs mais restent configurables indépendamment pour modifier leur statut minimal d’utilisation notamment : la rédaction de contenus sur le site modifiables dans la gestion des templates de formulaires ; l’ajout de notes aux articles ; l’ajout de légendes et d’annotations sur les images ;
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Dépôt de média et thèmes par FTP
31 mai 2013, parL’outil MédiaSPIP traite aussi les média transférés par la voie FTP. Si vous préférez déposer par cette voie, récupérez les identifiants d’accès vers votre site MédiaSPIP et utilisez votre client FTP favori.
Vous trouverez dès le départ les dossiers suivants dans votre espace FTP : config/ : dossier de configuration du site IMG/ : dossier des média déjà traités et en ligne sur le site local/ : répertoire cache du site web themes/ : les thèmes ou les feuilles de style personnalisées tmp/ : dossier de travail (...) -
Keeping control of your media in your hands
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Sur d’autres sites (7105)
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libav error message with H264 codec. "non-strictly-monotonic PTS"
13 mars 2018, par user1496491I have almost zero experience with
libav/FFMPEG. I wrote this piece of code which capturing the screen and writes it to the file, and I’m facing some prolems with that. I was working withAV_CODEC_ID_MPEG4codec at first, it worked just fine, but very quikly application started to spam messages like that[dshow @ 02da1c80] real-time buffer [screen-capture-recorder] [video input] too full or near too full (64% of size: 128000000 [rtbufsize parameter])! frame dropped!So I googled for some time, and found that probbably encoder is too slow, and I need to change it to faster one. So I changed it to
AV_CODEC_ID_H264. Suddenly written file became unreadable, and application started to spam messages[libx264 @ 0455ff40] non-strictly-monotonic PTSI looked everywhere and all I found was a suggestion to put this two lines
if(outPacket.pts != AV_NOPTS_VALUE) outPacket.pts = av_rescale_q(outPacket.pts, videoStream->codec->time_base, videoStream->time_base);
if(outPacket.dts != AV_NOPTS_VALUE) outPacket.dts = av_rescale_q(outPacket.dts, videoStream->codec->time_base, videoStream->time_base);So I added them, and the result was the same.
So, what should I do ? How do I configure output correctly ?
Here’s my code :
#include "MainWindow.h"
#include <qguiapplication>
#include <qlabel>
#include <qscreen>
#include <qtimer>
#include <qlayout>
#include <qimage>
#include <qtconcurrent></qtconcurrent>QtConcurrent>
#include <qthreadpool>
#include <qvideoframe>
#include "ScreenCapture.h"
MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent)
{
resize(800, 600);
label = new QLabel();
label->setAlignment(Qt::AlignHCenter | Qt::AlignVCenter);
auto layout = new QHBoxLayout();
layout->addWidget(label);
auto widget = new QWidget();
widget->setLayout(layout);
setCentralWidget(widget);
connect(this, &MainWindow::imageReady, [=](QImage image) {label->setPixmap(QPixmap::fromImage(image).scaled(label->size(), Qt::KeepAspectRatio));});
init();
initOutFile();
collectFrames();
}
MainWindow::~MainWindow()
{
isRunning = false;
QThreadPool::globalInstance()->waitForDone();
avformat_close_input(&inputFormatContext);
avformat_free_context(inputFormatContext);
}
void MainWindow::init()
{
av_register_all();
avcodec_register_all();
avdevice_register_all();
auto screen = QGuiApplication::screens()[0];
QRect geometry = screen->geometry();
inputFormatContext = avformat_alloc_context();
// AVDictionary* options = NULL;
// av_dict_set(&options, "framerate", "30", NULL);
// av_dict_set(&options, "offset_x", QString::number(geometry.x()).toLatin1().data(), NULL);
// av_dict_set(&options, "offset_y", QString::number(geometry.y()).toLatin1().data(), NULL);
// av_dict_set(&options, "preset", "ultrafast", NULL);
// av_dict_set(&options, "probesize", "10MB", NULL);
// av_dict_set(&options, "pix_fmt", "yuv420p", NULL);
// av_dict_set(&options, "video_size", QString(QString::number(geometry.width()) + "x" + QString::number(geometry.height())).toLatin1().data(), NULL);
// AVInputFormat* inputFormat = av_find_input_format("gdigrab");
// avformat_open_input(&inputFormatContext, "desktop", inputFormat, &options);
QSettings settings("HKEY_CURRENT_USER\\Software\\screen-capture-recorder", QSettings::NativeFormat);
settings.setValue("start_x", geometry.x());
settings.setValue("start_y", geometry.y());
settings.setValue("capture_width", geometry.width());
settings.setValue("capture_height", geometry.height());
AVDictionary* options = NULL;
av_dict_set(&options, "preset", "ultrafast", NULL);
av_dict_set(&options, "vcodec", "h264", NULL);
av_dict_set(&options, "video_size", "1920x1080", NULL);
av_dict_set(&options, "crf", "0", NULL);
av_dict_set(&options, "tune", "zerolatency", NULL);
av_dict_set(&options, "rtbufsize", "128M", NULL);
AVInputFormat *format = av_find_input_format("dshow");
avformat_open_input(&inputFormatContext, "video=screen-capture-recorder", format, &options);
av_dict_free(&options);
avformat_find_stream_info(inputFormatContext, NULL);
videoStreamIndex = av_find_best_stream(inputFormatContext, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0);
AVStream* inStream = inputFormatContext->streams[videoStreamIndex];
inputCodec = avcodec_find_decoder(inStream->codecpar->codec_id);
if(!inputCodec) qDebug() << "Can't find input codec!";
inputCodecContext = avcodec_alloc_context3(inputCodec);
qDebug() << "IN_FORMAT" << av_get_pix_fmt_name(inStream->codec->pix_fmt);
avcodec_parameters_to_context(inputCodecContext, inStream->codecpar);
if(avcodec_open2(inputCodecContext, inputCodec, NULL)) qDebug() << "Can't open input codec!";
}
void MainWindow::initOutFile()
{
const char* filename = "C:/Temp/output.mp4";
if(avformat_alloc_output_context2(&outFormatContext, NULL, NULL, filename) < 0) qDebug() << "Can't create out context!";
outCodec = avcodec_find_encoder(AV_CODEC_ID_H264);
if(!outCodec) qDebug() << "Can't find codec!";
videoStream = avformat_new_stream(outFormatContext, outCodec);
videoStream->time_base = {1, 30};
const AVPixelFormat* pixelFormat = outCodec->pix_fmts;
while (*pixelFormat != AV_PIX_FMT_NONE)
{
qDebug() << "OUT_FORMAT" << av_get_pix_fmt_name(*pixelFormat);
++pixelFormat;
}
outCodecContext = videoStream->codec;
outCodecContext->bit_rate = 16000000;
outCodecContext->rc_max_rate = 0;
outCodecContext->rc_buffer_size = 0;
outCodecContext->qmin = 10;
outCodecContext->qmax = 51;
outCodecContext->qcompress = 0.6f;
outCodecContext->width = inputCodecContext->width;
outCodecContext->height = inputCodecContext->height;
outCodecContext->time_base = videoStream->time_base;
outCodecContext->gop_size = 10;
outCodecContext->max_b_frames = 1;
outCodecContext->pix_fmt = AV_PIX_FMT_YUV420P;
if (outFormatContext->oformat->flags & AVFMT_GLOBALHEADER) outCodecContext->flags |= CODEC_FLAG_GLOBAL_HEADER;
if(avcodec_open2(outCodecContext, outCodec, NULL)) qDebug() << "Can't open out codec!";
swsContext = sws_getContext(inputCodecContext->width,
inputCodecContext->height,
inputCodecContext->pix_fmt,
outCodecContext->width,
outCodecContext->height,
outCodecContext->pix_fmt,
SWS_BICUBIC, NULL, NULL, NULL);
if(avio_open(&outFormatContext->pb, filename, AVIO_FLAG_WRITE) < 0) qDebug() << "Can't open file!";
if(avformat_write_header(outFormatContext, NULL) < 0) qDebug() << "Can't write header!";
}
void MainWindow::collectFrames()
{
QtConcurrent::run([this](){
AVFrame* inFrame = av_frame_alloc();
inFrame->format = inputCodecContext->pix_fmt;
inFrame->width = inputCodecContext->width;
inFrame->height = inputCodecContext->height;
int size = av_image_alloc(inFrame->data, inFrame->linesize, inFrame->width, inFrame->height, inputCodecContext->pix_fmt, 1);
AVFrame* outFrame = av_frame_alloc();
outFrame->format = outCodecContext->pix_fmt;
outFrame->width = outCodecContext->width;
outFrame->height = outCodecContext->height;
av_image_alloc(outFrame->data, outFrame->linesize, outFrame->width, outFrame->height, outCodecContext->pix_fmt, 1);
AVPacket packet;
av_init_packet(&packet);
while(isRunning && (av_read_frame(inputFormatContext, &packet) >= 0))
{
if(packet.stream_index == videoStream->index)
{
//for gdigrab
// uint8_t* result = new uint8_t[inFrame->width * inFrame->height * 4];
// for (int i = 0; i < inFrame->height * inFrame->width * 4; i += 4)
// {
// result[i + 0] = packet.data[i + 2]; //B
// result[i + 1] = packet.data[i + 3]; //G
// result[i + 2] = packet.data[i + 0]; //R
// result[i + 3] = packet.data[i + 1]; //A
// }
// memcpy(inFrame->data[0], result, size);
// delete result;
QImage image(packet.data, inFrame->width, inFrame->height, QImage::Format_ARGB32);
QImage mirrored = image.mirrored(false, true);
emit imageReady(mirrored);
memcpy(inFrame->data[0], mirrored.bits(), size);
sws_scale(swsContext, inFrame->data, inFrame->linesize, 0, inputCodecContext->height, outFrame->data, outFrame->linesize);
av_packet_unref(&packet);
AVPacket outPacket;
av_init_packet(&outPacket);
int encodeResult = AVERROR(EAGAIN);
while(encodeResult == AVERROR(EAGAIN))
{
if(avcodec_send_frame(outCodecContext, outFrame)) qDebug() << "Send frame error!";
encodeResult = avcodec_receive_packet(outCodecContext, &outPacket);
}
if(encodeResult != 0) qDebug() << "Encoding error!" << encodeResult;
if(outPacket.pts != AV_NOPTS_VALUE) outPacket.pts = av_rescale_q(outPacket.pts, videoStream->codec->time_base, videoStream->time_base);
if(outPacket.dts != AV_NOPTS_VALUE) outPacket.dts = av_rescale_q(outPacket.dts, videoStream->codec->time_base, videoStream->time_base);
av_interleaved_write_frame(outFormatContext, &outPacket);
av_packet_unref(&outPacket);
}
}
av_freep(inFrame->data);
av_freep(outFrame->data);
av_write_trailer(outFormatContext);
avio_close(outFormatContext->pb);
});
}
</qvideoframe></qthreadpool></qimage></qlayout></qtimer></qscreen></qlabel></qguiapplication> -
Streaming Webcam from Windows 10 to Ubuntu 18.04 via WSL2 and usbip [closed]
15 juin 2021, par Jacob DallasBackground

Alright so I was able to set up my Windows 10 desktop with WSL2 in order to run Ubuntu 18.04. I'm trying to get the webcam to be accessible and have picked and pieced together the following tutorials in order to get myself to where I am.

- 

- https://www.youtube.com/watch?v=IL7Jd9rjgrM
- https://github.com/rpasek/usbip-wsl2-instructions
- https://www.davecorder.org/windows-10/
- https://www.reddit.com/r/bashonubuntuonwindows/comments/gcbjfi/module_usbcore_not_found_in_directory/
- https://dmaiorino.com/?p=12













The Why

"Why would you go through this painstaking effort ? Seems dumb." you might be telling yourself. Well I think that it's dumb that WSL2 doesn't have a USB pass-through, so there's that. But I develop on Windows traditionally, and with a recent computer vision project I'm undertaking that incorporates the Nvidia Isaac SDK (only available on Ubuntu 18.04) I was hoping to continue to use Windows to develop, and then Ubuntu 18.04 to test. I'm trying to stay away from dual booting because switching back and forth between OSs is time-consuming.

Current State

What I'm able to do is pass through the web camera using usbip from windows using the following commands

.\usbip.exe bind -b 1-189

.\usbipd.exe -d -4

and then on the linux side I connect it by running

sudo usbip attach --remote=172.30.64.1 --busid=1-220

except that I put in my own remote address and busid

What that results in is the ability to see that the camera is attached and seen by linux, but no matter what program/library I use, none of them are able to open the webcam


Here are some outputs from different commands people have used to display camera information :


~$ v4l2-ctl --list-devices 
Logitech Webcam C930e (usb-vhci_hcd.0-1):
 /dev/video0
 /dev/video1

~$ v4l-info /dev/video0

### v4l2 device info [/dev/video0] ###
general info
 VIDIOC_QUERYCAP
 driver : "uvcvideo"
 card : "Logitech Webcam C930e"
 bus_info : "usb-vhci_hcd.0-1"
 version : 4.19.84
 capabilities : 0x84a00001 [VIDEO_CAPTURE,?,?,STREAMING,(null)]

standards

inputs
 VIDIOC_ENUMINPUT(0)
 index : 0
 name : "Camera 1"
 type : CAMERA
 audioset : 0
 tuner : 0
 std : 0x0 []
 status : 0x0 []

video capture
 VIDIOC_ENUM_FMT(0,VIDEO_CAPTURE)
 index : 0
 type : VIDEO_CAPTURE
 flags : 0
 description : "YUYV 4:2:2"
 pixelformat : 0x56595559 [YUYV]
 VIDIOC_ENUM_FMT(1,VIDEO_CAPTURE)
 index : 1
 type : VIDEO_CAPTURE
 flags : 1
 description : "Motion-JPEG"
 pixelformat : 0x47504a4d [MJPG]
 VIDIOC_G_FMT(VIDEO_CAPTURE)
 type : VIDEO_CAPTURE
 fmt.pix.width : 640
 fmt.pix.height : 480
 fmt.pix.pixelformat : 0x56595559 [YUYV]
 fmt.pix.field : NONE
 fmt.pix.bytesperline : 1280
 fmt.pix.sizeimage : 614400
 fmt.pix.colorspace : SRGB
 fmt.pix.priv : 4276996862

controls
 VIDIOC_QUERYCTRL(BASE+0)
 id : 9963776
 type : INTEGER
 name : "Brightness"
 minimum : 0
 maximum : 255
 step : 1
 default_value : 128
 flags : unknown
 VIDIOC_QUERYCTRL(BASE+1)
 id : 9963777
 type : INTEGER
 name : "Contrast"
 minimum : 0
 maximum : 255
 step : 1
 default_value : 128
 flags : unknown
 VIDIOC_QUERYCTRL(BASE+2)
 id : 9963778
 type : INTEGER
 name : "Saturation"
 minimum : 0
 maximum : 255
 step : 1
 default_value : 128
 flags : unknown
 VIDIOC_QUERYCTRL(BASE+12)
 id : 9963788
 type : BOOLEAN
 name : "White Balance Temperature, Auto"
 minimum : 0
 maximum : 1
 step : 1
 default_value : 1
 flags : unknown
 VIDIOC_QUERYCTRL(BASE+19)
 id : 9963795
 type : INTEGER
 name : "Gain"
 minimum : 0
 maximum : 255
 step : 1
 default_value : 0
 flags : unknown
 VIDIOC_QUERYCTRL(BASE+24)
 id : 9963800
 type : MENU
 name : "Power Line Frequency"
 minimum : 0
 maximum : 2
 step : 1
 default_value : 2
 flags : unknown
 VIDIOC_QUERYCTRL(BASE+26)
 id : 9963802
 type : INTEGER
 name : "White Balance Temperature"
 minimum : 2000
 maximum : 7500
 step : 1
 default_value : 4000
 flags : INACTIVE
 VIDIOC_QUERYCTRL(BASE+27)
 id : 9963803
 type : INTEGER
 name : "Sharpness"
 minimum : 0
 maximum : 255
 step : 1
 default_value : 128
 flags : unknown
 VIDIOC_QUERYCTRL(BASE+28)
 id : 9963804
 type : INTEGER
 name : "Backlight Compensation"
 minimum : 0
 maximum : 1
 step : 1
 default_value : 0
 flags : unknown

~$ sudo ffmpeg -y -t 5 -f video4linux2 -i /dev/video0 out.mov
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
 configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
 libavutil 55. 78.100 / 55. 78.100
 libavcodec 57.107.100 / 57.107.100
 libavformat 57. 83.100 / 57. 83.100
 libavdevice 57. 10.100 / 57. 10.100
 libavfilter 6.107.100 / 6.107.100
 libavresample 3. 7. 0 / 3. 7. 0
 libswscale 4. 8.100 / 4. 8.100
 libswresample 2. 9.100 / 2. 9.100
 libpostproc 54. 7.100 / 54. 7.100
/dev/video0: Input/output error

~$ ffmpeg -f v4l2 -video_size 640x480 -i /dev/video0 -frames 1 out.jpg
ffmpeg version 3.4.8-0ubuntu0.2 Copyright (c) 2000-2020 the FFmpeg developers
 built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
 configuration: --prefix=/usr --extra-version=0ubuntu0.2 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --disable-stripping --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librubberband --enable-librsvg --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libopencv --enable-libx264 --enable-shared
 libavutil 55. 78.100 / 55. 78.100
 libavcodec 57.107.100 / 57.107.100
 libavformat 57. 83.100 / 57. 83.100
 libavdevice 57. 10.100 / 57. 10.100
 libavfilter 6.107.100 / 6.107.100
 libavresample 3. 7. 0 / 3. 7. 0
 libswscale 4. 8.100 / 4. 8.100
 libswresample 2. 9.100 / 2. 9.100
 libpostproc 54. 7.100 / 54. 7.100
/dev/video0: Input/output error



I'm not sure if I don't have a specific library, driver, random other thing, but everything I've tried so far seems to not solve the problem.

Question

Linux sees the web camera, knows that it is a web camera, but is not processing the camera feed. What would you recommend I do to be able to process the video feed ? I think this is an issue with my settings when I originally set up linux withmenuconfig.
Any help would be appreciated :)

-
ffmpeg performance on raspberry pi
20 août 2021, par RudiI'm running ffmpeg on a rasperry pi 4. I'm capturing the signal of an usb device.


ffprobes output is :


pi@skycam:~ $ ffprobe /dev/video0
ffprobe version 4.1.4-1+rpt7~deb10u1 Copyright (c) 2007-2019 the FFmpeg developers
 built with gcc 8 (Raspbian 8.3.0-6+rpi1)
 configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared --libdir=/usr/lib/arm-linux-gnueabihf --cpu=arm1176jzf-s --arch=arm
 WARNING: library configuration mismatch
 avutil configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avcodec configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avformat configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avdevice configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avfilter configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 avresample configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 swscale configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 swresample configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 postproc configuration: --prefix=/usr --extra-version='1+rpt7~deb10u1' --toolchain=hardened --incdir=/usr/include/arm-linux-gnueabihf --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opengl --enable-sdl2 --enable-omx-rpi --enable-mmal --enable-neon --enable-rpi --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --libdir=/usr/lib/arm-linux-gnueabihf/neon/vfp --cpu=cortex-a7 --arch=armv6t2 --disable-thumb --enable-shared --disable-doc --disable-programs
 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
Input #0, video4linux2,v4l2, from '/dev/video0':
 Duration: N/A, start: 1230.660915, bitrate: 1990656 kb/s
 Stream #0:0: Video: rawvideo (YUY2 / 0x32595559), yuyv422, 1920x1080, 1990656 kb/s, 60 fps, 60 tbr, 1000k tbn, 1000k tbc


the ffmpeg call i'm using is :


bin/ffmpeg -loglevel quiet -re -f v4l2 -i /dev/video0 -tune zerolatency -preset ultrafast -pix_fmt yuv420p out.mkv


put the framerate starts at around 20 and increases slowly to 36. Also when reviewing the output videos i feel like i see a bit of a framedrop so the video is not as smooth as the input.


Is this due to a lack of power of the raspberry or are there any tweaks i could use to improve performance ? I don't care about the output format, framerate or resolution


thank you very much


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