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x86/hevcdec : sao, refact out h26x macros
19 octobre 2024, par Shaun Loo -
what are the ffmpeg parameters for capturing the screen on raspbian ?
1er février 2024, par njamescoukI'm trying to use ffmpeg to record the screen produced by my
raspberry pi. I don't need sound.


What I've tried / what I'm seeing :


$ ffmpeg -video_size 1024x768 -framerate 25 -f x11grab -i :0.0+100,200 output.mp4
ffmpeg version 5.1.4-0+rpt1+deb12u1 Copyright (c) 2000-2023 the FFmpeg developers
 built with gcc 12 (Debian 12.2.0-14)
 configuration: --prefix=/usr --extra-version=0+rpt1+deb12u1 --toolchain=hardened --incdir=/usr/include/aarch64-linux-gnu --enable-gpl --disable-stripping --disable-mmal --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libdav1d --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libglslang --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librabbitmq --enable-librist --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libsrt --enable-libssh --enable-libsvtav1 --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sand --enable-sdl2 --disable-sndio --enable-libjxl --enable-neon --enable-v4l2-request --enable-libudev --enable-epoxy --libdir=/usr/lib/aarch64-linux-gnu --arch=arm64 --enable-pocketsphinx --enable-librsvg --enable-libdc1394 --enable-libdrm --enable-vout-drm --enable-libiec61883 --enable-chromaprint --enable-frei0r --enable-libx264 --enable-libplacebo --enable-librav1e --enable-shared
 libavutil 57. 28.100 / 57. 28.100
 libavcodec 59. 37.100 / 59. 37.100
 libavformat 59. 27.100 / 59. 27.100
 libavdevice 59. 7.100 / 59. 7.100
 libavfilter 8. 44.100 / 8. 44.100
 libswscale 6. 7.100 / 6. 7.100
 libswresample 4. 7.100 / 4. 7.100
 libpostproc 56. 6.100 / 56. 6.100
[x11grab @ 0x5555e1899a20] Cannot open display :0.0+100,200, error 1.
:0.0+100,200: Input/output error


I suspect x11grab is the problem, but have no idea what to use.


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FFMPEG Pipeline Crash [closed]
17 août 2023, par Badgio10177I instantiate an ffmpeg pipeline within C++. No frames get streamed to the RTSP server and the pipeline crashes unexpectedly.


I have the following code :


#include <iostream>
#include <typeinfo>
#include "opencvmex.hpp"
#include 
#include 
#include "mex.h"
#include 
#include 
#include // Windows API for process enumeration
#include <opencv2></opencv2>core.hpp>

// Global variables
FILE* openPipeLine = NULL;

//////////////////////////////////////////////////////////////////////////////
// Exit function to execute when the mex function is cleared.
//////////////////////////////////////////////////////////////////////////////
void exitFcn()
{
 fflush(openPipeLine); // Clear out the pipeline.
 _pclose(openPipeLine); //Close the pipeline.
}

///////////////////////////////////////////////////////////////////////////
// Main entry point to a MEX function
///////////////////////////////////////////////////////////////////////////
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[], int frameWidth, int frameHeight)
{
 // Use the appropriate namespace for OpenCV functions
 using namespace cv;

 Ptr<mat> inputFrame = ocvMxArrayToImage_uint8(prhs[0], true);
 Mat processedFrame = *inputFrame;

 // Check if FFMPEG process has been started
 if (!openPipeLine)
 {
 openPipeLine = _popen("ffmpeg -f rawvideo -r 10 -video_size 1280x720 -pixel_format bgr24 -i pipe: -vcodec libx264 -crf 25 -pix_fmt yuv420p -f rtsp rtsp://192.168.0.2:8554/mystream 2> log.txt", "wb");
 }

 // Write the frame data to the pipeline
 fwrite(processedFrame.data, 1, frameWidth * frameHeight * 3, openPipeLine);
 mexAtExit(exitFcn);
}



</mat></typeinfo></iostream>

The function is a Matlab Mex function. What is interesting is that there are certain times when the stream works and some times it just crashes. The log file for the ffmpeg process is the following :


ffmpeg version 2023-08-14-git-c704901324-full_build-www.gyan.dev Copyright (c) 2000-2023 the FFmpeg developers
 built with gcc 12.2.0 (Rev10, Built by MSYS2 project)
 configuration: --enable-gpl --enable-version3 --enable-static --disable-w32threads --disable-autodetect --enable-fontconfig --enable-iconv --enable-gnutls --enable-libxml2 --enable-gmp --enable-bzlib --enable-lzma --enable-libsnappy --enable-zlib --enable-librist --enable-libsrt --enable-libssh --enable-libzmq --enable-avisynth --enable-libbluray --enable-libcaca --enable-sdl2 --enable-libaribb24 --enable-libaribcaption --enable-libdav1d --enable-libdavs2 --enable-libuavs3d --enable-libzvbi --enable-librav1e --enable-libsvtav1 --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs2 --enable-libxvid --enable-libaom --enable-libjxl --enable-libopenjpeg --enable-libvpx --enable-mediafoundation --enable-libass --enable-frei0r --enable-libfreetype --enable-libfribidi --enable-libharfbuzz --enable-liblensfun --enable-libvidstab --enable-libvmaf --enable-libzimg --enable-amf --enable-cuda-llvm --enable-cuvid --enable-ffnvcodec --enable-nvdec --enable-nvenc --enable-d3d11va --enable-dxva2 --enable-libvpl --enable-libshaderc --enable-vulkan --enable-libplacebo --enable-opencl --enable-libcdio --enable-libgme --enable-libmodplug --enable-libopenmpt --enable-libopencore-amrwb --enable-libmp3lame --enable-libshine --enable-libtheora --enable-libtwolame --enable-libvo-amrwbenc --enable-libcodec2 --enable-libilbc --enable-libgsm --enable-libopencore-amrnb --enable-libopus --enable-libspeex --enable-libvorbis --enable-ladspa --enable-libbs2b --enable-libflite --enable-libmysofa --enable-librubberband --enable-libsoxr --enable-chromaprint
 libavutil 58. 16.101 / 58. 16.101
 libavcodec 60. 23.100 / 60. 23.100
 libavformat 60. 10.100 / 60. 10.100
 libavdevice 60. 2.101 / 60. 2.101
 libavfilter 9. 11.100 / 9. 11.100
 libswscale 7. 3.100 / 7. 3.100
 libswresample 4. 11.100 / 4. 11.100
 libpostproc 57. 2.100 / 57. 2.100
Input #0, rawvideo, from 'pipe:':
 Duration: N/A, start: 0.000000, bitrate: 221184 kb/s
 Stream #0:0: Video: rawvideo (BGR[24] / 0x18524742), bgr24, 1280x720, 221184 kb/s, 10 tbr, 10 tbn
Stream mapping:
 Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
[libx264 @ 0000027964ad6300] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2 AVX512
[libx264 @ 0000027964ad6300] profile High, level 3.1, 4:2:0, 8-bit
[libx264 @ 0000027964ad6300] 264 - core 164 r3107 a8b68eb - H.264/MPEG-4 AVC codec - Copyleft 2003-2023 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=22 lookahead_threads=3 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=10 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=25.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
Output #0, rtsp, to 'rtsp://192.168.0.2:8554/mystream':
 Metadata:
 encoder : Lavf60.10.100
 Stream #0:0: Video: h264, yuv420p(tv, progressive), 1280x720, q=2-31, 10 fps, 90k tbn
 Metadata:
 encoder : Lavc60.23.100 libx264
 Side data:
 cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
frame= 0 fps=0.0 q=0.0 size= 0kB time=N/A bitrate=N/A speed=N/A 
[vost#0:0/libx264 @ 0000027964ad5f00] Error submitting a packet to the muxer: Broken pipe
[out#0/rtsp @ 0000027964abdf00] Error muxing a packet
frame= 1 fps=0.1 q=27.0 size=N/A time=-00:00:00.10 bitrate=N/A speed=N/A 
[out#0/rtsp @ 0000027964abdf00] video:146kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
frame= 1 fps=0.0 q=-1.0 Lsize=N/A time=00:00:06.50 bitrate=N/A speed=0.32x 
[libx264 @ 0000027964ad6300] frame I:1 Avg QP:26.79 size:148574
[libx264 @ 0000027964ad6300] frame P:17 Avg QP:21.66 size: 23672
[libx264 @ 0000027964ad6300] frame B:50 Avg QP:28.20 size: 3276
[libx264 @ 0000027964ad6300] consecutive B-frames: 1.5% 0.0% 4.4% 94.1%
[libx264 @ 0000027964ad6300] mb I I16..4: 1.1% 53.0% 45.9%
[libx264 @ 0000027964ad6300] mb P I16..4: 1.8% 9.3% 1.2% P16..4: 29.5% 10.2% 14.0% 0.0% 0.0% skip:34.0%
[libx264 @ 0000027964ad6300] mb B I16..4: 0.1% 0.5% 0.0% B16..8: 21.1% 3.3% 1.3% direct: 2.0% skip:71.7% L0:50.9% L1:46.2% BI: 2.9%
[libx264 @ 0000027964ad6300] 8x8 transform intra:68.9% inter:94.3%
[libx264 @ 0000027964ad6300] coded y,uvDC,uvAC intra: 78.9% 70.2% 26.1% inter: 10.9% 8.9% 1.7%
[libx264 @ 0000027964ad6300] i16 v,h,dc,p: 31% 36% 32% 1%
[libx264 @ 0000027964ad6300] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 16% 22% 40% 4% 2% 2% 3% 2% 10%
[libx264 @ 0000027964ad6300] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 29% 32% 8% 4% 4% 4% 6% 4% 9%
[libx264 @ 0000027964ad6300] i8c dc,h,v,p: 35% 36% 24% 5%
[libx264 @ 0000027964ad6300] Weighted P-Frames: Y:0.0% UV:0.0%
[libx264 @ 0000027964ad6300] ref P L0: 60.0% 17.6% 9.3% 13.1%
[libx264 @ 0000027964ad6300] ref B L0: 73.1% 20.1% 6.8%
[libx264 @ 0000027964ad6300] ref B L1: 88.0% 12.0%
[libx264 @ 0000027964ad6300] kb/s:840.93
Conversion failed!



Are there any parameters in my pipeline that are causing the process to crash ?


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