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OpenCV 3.4.3 - GStream not called when VideoWriting
14 décembre 2018, par taubhiI’d like to succeed writing a file with OpenCV encoding with GStreamer.
Thus I’m using the code :
VideoWriter.open("appsrc ! autovideoconvert ! omxh264enc ! matroskamux ! filesink location=test2.mkv sync=false",
//cv::CAP_GSTREAMER, //set or not, I get the same problem
0, (double)25, //fourcc, fps
cv::Size(1024, 1024),
true);And my problem :
A video file called appsrc ! autovideoconvert ! omxh264enc ! matroskamux ! filesink location=test2.mkv sync=false is created (rather than test2.mkv), and it is empty. The same problem is corrected and seems to work in the following thread, without any effect for me : Opening a GStreamer pipeline from OpenCV with VideoWriter
I tried, without success :
- Add quotes to the file name test2 :
"appsrc ! autovideoconvert ! omxh264enc ! matroskamux ! filesink location=\"test2.mkv\" sync=false" neither - Encode with different format : .flv rather than .mkv
- Encode with different codec : omxh265enc rather than omxh264en
I checked :
-
That GStreamer is well compiled with OpenCV ; the CMake of the OpenCV project outputs :
Video I/O:Video for Windows : YES
DC1394 : NO
FFMPEG : YES (prebuilt binaries)
avcodec : YES (ver 57.107.100)
avformat : YES (ver 57.83.100)
avutil : YES (ver 55.78.100)
swscale : YES (ver 4.8.100)
avresample : YES (ver 3.7.0)
GStreamer :base : YES (ver 1.0)
video : YES (ver 1.0)
app : YES (ver 1.0)
riff : YES (ver 1.0)
pbutils : YES (ver 1.0)
DirectShow : YES
Media Foundation : YES
-
That FFMpeg is installed on my computer ; for this I used VLC :
File -> Stream -> Add a file then stream
New destination : RTP/MPEG Transport Stream
Profile : Video - H.264 + MP3 (MP4)
Then no error happens ; Note : an error occured with Video - H.265 + MP3
(MP4), but I’m using omxh264enc in my code, not 265
I’m struggled :/ Do you have any idea ?
Thanks a lot :)Have a good day,
Thibaut
PS - Complete OpenCV CMake output :
Selecting Windows SDK version 10.0.17134.0 to target Windows 10.0.17763.
AVX_512F is not supported by C++ compiler
AVX512_SKX is not supported by C++ compiler
Dispatch optimization AVX512_SKX is not available, skipped
libjpeg-turbo: VERSION = 1.5.3, BUILD = opencv-3.4.3-libjpeg-turbo
Looking for Mfapi.h
Looking for Mfapi.h - found
found Intel IPP (ICV version): 2017.0.3 [2017.0.3]
at: E:/OpenCV/3.4.3/build-cuda92-gstreamer/3rdparty/ippicv/ippicv_win
found Intel IPP IW sources: 2017.0.3
at: E:/OpenCV/3.4.3/build-cuda92-gstreamer/3rdparty/ippicv/ippiw_win
CUDA detected: 9.2
CUDA NVCC target flags: -gencode;arch=compute_30,code=sm_30;-gencode;arch=compute_35,code=sm_35;-gencode;arch=compute_37,code=sm_37;-gencode;arch=compute_50,code=sm_50;-gencode;arch=compute_52,code=sm_52;-gencode;arch=compute_60,code=sm_60;-gencode;arch=compute_61,code=sm_61;-gencode;arch=compute_70,code=sm_70;-D_FORCE_INLINES
Found apache ant: C:/NVPACK/apache-ant-1.8.2/bin/ant.bat (1.8.2)
Could NOT find Matlab (missing: MATLAB_MEX_SCRIPT MATLAB_INCLUDE_DIRS MATLAB_ROOT_DIR MATLAB_LIBRARIES MATLAB_LIBRARY_DIRS MATLAB_MEXEXT MATLAB_ARCH MATLAB_BIN)
VTK is not found. Please set -DVTK_DIR in CMake to VTK build directory, or to VTK install subdirectory with VTKConfig.cmake file
Caffe: NO
Protobuf: NO
Glog: YES
freetype2: NO
harfbuzz: NO
Module opencv_ovis disabled because OGRE3D was not found
No preference for use of exported gflags CMake configuration set, and no hints for include/library directories provided. Defaulting to preferring an installed/exported gflags CMake configuration if available.
Found installed version of gflags: E:/Git/gflags/BUILD-VS2015
Detected gflags version: 2.2.1
Checking SFM deps... FALSE
Module opencv_sfm disabled because the following dependencies are not found: Eigen Glog/Gflags
Excluding from source files list: <build>/modules/dnn/layers/layers_common.avx512_skx.cpp
Tesseract: NO
General configuration for OpenCV 3.4.3 =====================================
Version control: unknown
Extra modules:
Location (extra): E:/OpenCV/3.4.3/opencv_contrib-3.4.3/modules
Version control (extra): unknown
Platform:
Timestamp: 2018-11-07T16:57:18Z
Host: Windows 10.0.17763 AMD64
CMake: 3.12.0-rc2
CMake generator: Visual Studio 14 2015 Win64
CMake build tool: C:/Program Files (x86)/MSBuild/14.0/bin/MSBuild.exe
MSVC: 1900
CPU/HW features:
Baseline: SSE SSE2 SSE3
requested: SSE3
Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2
requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
SSE4_1 (5 files): + SSSE3 SSE4_1
SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2
FP16 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
AVX (6 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
AVX2 (11 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
C/C++:
Built as dynamic libs?: YES
C++11: YES
C++ Compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe (ver 19.0.24215.1)
C++ flags (Release): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /MP16 /MD /O2 /Ob2 /DNDEBUG
C++ flags (Debug): /DWIN32 /D_WINDOWS /W4 /GR /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /EHa /wd4127 /wd4251 /wd4324 /wd4275 /wd4512 /wd4589 /MP16 /MDd /Zi /Ob0 /Od /RTC1
C Compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe
C flags (Release): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /MP16 /MD /O2 /Ob2 /DNDEBUG
C flags (Debug): /DWIN32 /D_WINDOWS /W3 /D _CRT_SECURE_NO_DEPRECATE /D _CRT_NONSTDC_NO_DEPRECATE /D _SCL_SECURE_NO_WARNINGS /Gy /bigobj /Oi /MP16 /MDd /Zi /Ob0 /Od /RTC1
Linker flags (Release): /machine:x64 /INCREMENTAL:NO
Linker flags (Debug): /machine:x64 /debug /INCREMENTAL
ccache: NO
Precompiled headers: YES
Extra dependencies: cudart.lib nppc.lib nppial.lib nppicc.lib nppicom.lib nppidei.lib nppif.lib nppig.lib nppim.lib nppist.lib nppisu.lib nppitc.lib npps.lib cublas.lib cufft.lib -LIBPATH:C:/Program Files/NVIDIA GPU Computing Toolkit/CUDA/v9.2/lib/x64
3rdparty dependencies:
OpenCV modules:
To be built: aruco bgsegm bioinspired calib3d ccalib core cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev datasets dnn dnn_objdetect dpm face features2d flann fuzzy hfs highgui img_hash imgcodecs imgproc java java_bindings_generator line_descriptor ml objdetect optflow phase_unwrapping photo plot python_bindings_generator reg rgbd saliency shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab xfeatures2d ximgproc xobjdetect xphoto
Disabled: js world
Disabled by dependency: -
Unavailable: cnn_3dobj cvv freetype hdf matlab ovis python2 python3 sfm viz
Applications: tests perf_tests apps
Documentation: NO
Non-free algorithms: NO
Windows RT support: NO
GUI:
Win32 UI: YES
VTK support: NO
Media I/O:
ZLib: build (ver 1.2.11)
JPEG: build-libjpeg-turbo (ver 1.5.3-62)
WEBP: build (ver encoder: 0x020e)
PNG: build (ver 1.6.34)
TIFF: build (ver 42 - 4.0.9)
JPEG 2000: build (ver 1.900.1)
OpenEXR: build (ver 1.7.1)
HDR: YES
SUNRASTER: YES
PXM: YES
Video I/O:
Video for Windows: YES
DC1394: NO
FFMPEG: YES (prebuilt binaries)
avcodec: YES (ver 57.107.100)
avformat: YES (ver 57.83.100)
avutil: YES (ver 55.78.100)
swscale: YES (ver 4.8.100)
avresample: YES (ver 3.7.0)
GStreamer:
base: YES (ver 1.0)
video: YES (ver 1.0)
app: YES (ver 1.0)
riff: YES (ver 1.0)
pbutils: YES (ver 1.0)
DirectShow: YES
Media Foundation: YES
Parallel framework: Concurrency
Trace: YES (with Intel ITT)
Other third-party libraries:
Intel IPP: 2017.0.3 [2017.0.3]
at: E:/OpenCV/3.4.3/build-cuda92-gstreamer/3rdparty/ippicv/ippicv_win
Intel IPP IW: sources (2017.0.3)
at: E:/OpenCV/3.4.3/build-cuda92-gstreamer/3rdparty/ippicv/ippiw_win
Custom HAL: NO
Protobuf: build (3.5.1)
NVIDIA CUDA: YES (ver 9.2, CUFFT CUBLAS NVCUVID)
NVIDIA GPU arch: 30 35 37 50 52 60 61 70
NVIDIA PTX archs:
OpenCL: YES (no extra features)
Include path: E:/OpenCV/3.4.3/opencv-3.4.3/3rdparty/include/opencl/1.2
Link libraries: Dynamic load
Python (for build): C:/ProgramData/Miniconda3/python.exe
Java:
ant: C:/NVPACK/apache-ant-1.8.2/bin/ant.bat (ver 1.8.2)
JNI: C:/NVPACK/jdk1.8.0_77/include C:/NVPACK/jdk1.8.0_77/include/win32 C:/NVPACK/jdk1.8.0_77/include
Java wrappers: YES
Java tests: YES
Matlab: NO
Install to: E:/OpenCV/3.4.3/build/install
-----------------------------------------------------------------
Configuring done
</build> - Add quotes to the file name test2 :
-
FFMPEG Link error
30 novembre 2014, par ThomasI’m trying to compile a modified version of this transcoding example from the FFMPEG site, I’ve used all the required includes and joined the libs using this :
INCLUDEPATH += $$(FFMPEG_DEV_PATH)\include
LIBS += -L$$(FFMPEG_DEV_PATH)\lib -lavformat -lavcodec -lavutil -lswscale -liconv -lz -lavfilterbut I get this linking error that I can’t understand :
"avio_close(AVIOContext*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"av_strerror(int, char*, unsigned long)", referenced from:
av_make_error_string(char*, unsigned long, int) in PhVideoEncoder.o
"av_rescale_q(long long, AVRational, AVRational)", referenced from:
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
"av_frame_free(AVFrame**)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
PhVideoEncoder::filter_encode_write_frame(AVFrame*, unsigned int) in PhVideoEncoder.o
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
"av_read_frame(AVFormatContext*, AVPacket*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avcodec_close(AVCodecContext*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avcodec_open2(AVCodecContext*, AVCodec const*, AVDictionary**)", referenced from:
PhVideoEncoder::open_input_file(char const*) in PhVideoEncoder.o
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"av_dump_format(AVFormatContext*, int, char const*, int)", referenced from:
PhVideoEncoder::open_input_file(char const*) in PhVideoEncoder.o
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"av_frame_alloc()", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
PhVideoEncoder::filter_encode_write_frame(AVFrame*, unsigned int) in PhVideoEncoder.o
"av_free_packet(AVPacket*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"av_init_packet(AVPacket*)", referenced from:
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
"av_opt_set_bin(void*, char const*, unsigned char const*, int, int)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"av_register_all()", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"av_rescale_q_rnd(long long, AVRational, AVRational, AVRounding)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
"av_write_trailer(AVFormatContext*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avfilter_graph_free(AVFilterGraph**)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avfilter_inout_free(AVFilterInOut**)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avformat_new_stream(AVFormatContext*, AVCodec const*)", referenced from:
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"avformat_open_input(AVFormatContext**, char const*, AVInputFormat*, AVDictionary**)", referenced from:
PhVideoEncoder::open_input_file(char const*) in PhVideoEncoder.o
"avcodec_copy_context(AVCodecContext*, AVCodecContext const*)", referenced from:
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"avcodec_find_decoder(AVCodecID)", referenced from:
PhVideoEncoder::open_input_file(char const*) in PhVideoEncoder.o
"avcodec_find_encoder(AVCodecID)", referenced from:
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"avfilter_get_by_name(char const*)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avfilter_graph_alloc()", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avfilter_inout_alloc()", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avformat_close_input(AVFormatContext**)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avcodec_decode_audio4(AVCodecContext*, AVFrame*, int*, AVPacket const*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avcodec_decode_video2(AVCodecContext*, AVFrame*, int*, AVPacket const*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avcodec_encode_audio2(AVCodecContext*, AVPacket*, AVFrame const*, int*)", referenced from:
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
"avcodec_encode_video2(AVCodecContext*, AVPacket*, AVFrame const*, int*)", referenced from:
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
"avfilter_graph_config(AVFilterGraph*, void*)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avfilter_register_all()", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avformat_free_context(AVFormatContext*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"avformat_write_header(AVFormatContext*, AVDictionary**)", referenced from:
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"av_get_sample_fmt_name(AVSampleFormat)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"av_buffersink_get_frame(AVFilterContext*, AVFrame*)", referenced from:
PhVideoEncoder::filter_encode_write_frame(AVFrame*, unsigned int) in PhVideoEncoder.o
"avfilter_graph_parse_ptr(AVFilterGraph*, char const*, AVFilterInOut**, AVFilterInOut**, void*)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avformat_find_stream_info(AVFormatContext*, AVDictionary**)", referenced from:
PhVideoEncoder::open_input_file(char const*) in PhVideoEncoder.o
"av_interleaved_write_frame(AVFormatContext*, AVPacket*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
"av_buffersrc_add_frame_flags(AVFilterContext*, AVFrame*, int)", referenced from:
PhVideoEncoder::filter_encode_write_frame(AVFrame*, unsigned int) in PhVideoEncoder.o
"avfilter_graph_create_filter(AVFilterContext**, AVFilter const*, char const*, char const*, void*, AVFilterGraph*)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"av_get_default_channel_layout(int)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avformat_alloc_output_context2(AVFormatContext**, AVOutputFormat*, char const*, char const*)", referenced from:
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"av_get_channel_layout_nb_channels(unsigned long long)", referenced from:
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
"av_frame_get_best_effort_timestamp(AVFrame const*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"av_log(void*, int, char const*, ...)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
PhVideoEncoder::filter_encode_write_frame(AVFrame*, unsigned int) in PhVideoEncoder.o
PhVideoEncoder::flush_encoder(unsigned int) in PhVideoEncoder.o
PhVideoEncoder::open_input_file(char const*) in PhVideoEncoder.o
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.o
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
PhVideoEncoder::encode_write_frame(AVFrame*, unsigned int, int*) in PhVideoEncoder.o
...
"av_free(void*)", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"av_malloc(unsigned long)", referenced from:
av_malloc_array(unsigned long, unsigned long) in PhVideoEncoder.o
"av_strdup(char const*)", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"avio_open(AVIOContext**, char const*, int)", referenced from:
PhVideoEncoder::open_output_file(char const*) in PhVideoEncoder.oI tried looking for missing libraries but with no luck... What am I missing ?
EDIT
Thanks to the first answer, I added the
extern Cstuff but I still face a few errors :Undefined symbols for architecture x86_64:
"_av_buffersink_get_frame", referenced from:
PhVideoEncoder::filter_encode_write_frame(AVFrame*, unsigned int) in PhVideoEncoder.o
"_av_buffersrc_add_frame_flags", referenced from:
PhVideoEncoder::filter_encode_write_frame(AVFrame*, unsigned int) in PhVideoEncoder.o
"_avfilter_get_by_name", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"_avfilter_graph_alloc", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"_avfilter_graph_config", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"_avfilter_graph_create_filter", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"_avfilter_graph_free", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
"_avfilter_graph_parse_ptr", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"_avfilter_inout_alloc", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"_avfilter_inout_free", referenced from:
PhVideoEncoder::init_filter(FilteringContext*, AVCodecContext*, AVCodecContext*, char const*) in PhVideoEncoder.o
"_avfilter_register_all", referenced from:
PhVideoEncoder::PhVideoEncoder(QString) in PhVideoEncoder.o
ld: symbol(s) not found for architecture x86_64 -
Can't set seeker in GSTREAMER cv2, python
29 avril, par Alperen ÖlçerI want to skip n seconds forward and backward in gstreamer cv2 capture for recorded videos. But when I use
cap_gstreamer.set(cv2.CAP_PROP_POS_FRAMES, fps*skip_second)it resets seeker to beginning of video. How can I solve it ? I wrote an example, used recorded clock video.

import cv2

video_p = '/home/alperenlcr/Videos/clock.mp4'

cap_gstreamer = cv2.VideoCapture(video_p, cv2.CAP_GSTREAMER)
cap_ffmpeg = cv2.VideoCapture(video_p, cv2.CAP_FFMPEG)

fps = cap_gstreamer.get(cv2.CAP_PROP_FPS)
skip_second = 100

im1 = cv2.resize(cap_gstreamer.read()[1], (960, 540))
im1_ffmpeg = cv2.resize(cap_ffmpeg.read()[1], (960, 540))

cap_gstreamer.set(cv2.CAP_PROP_POS_FRAMES, fps*skip_second)
cap_ffmpeg.set(cv2.CAP_PROP_POS_FRAMES, fps*skip_second)

im2 = cv2.resize(cap_gstreamer.read()[1], (960, 540))
im2_ffmpeg = cv2.resize(cap_ffmpeg.read()[1], (960, 540))

merge_gstreamer = cv2.hconcat([im1, im2])
merge_ffmpeg = cv2.hconcat([im1_ffmpeg, im2_ffmpeg])

cv2.imshow(str(skip_second) + ' gstreamer', merge_gstreamer)
cv2.imshow(str(skip_second) + ' ffmpeg', merge_ffmpeg)
cv2.waitKey(0)
cv2.destroyAllWindows()

cap_gstreamer.release()
cap_ffmpeg.release()



Result :



My cv2 build is like :


>>> print(cv2.getBuildInformation())

General configuration for OpenCV 4.8.1 =====================================
 Version control: 4.8.1-dirty

 Extra modules:
 Location (extra): /home/alperenlcr/SourceInstalls/opencv_contrib/modules
 Version control (extra): 4.8.1

 Platform:
 Timestamp: 2024-12-02T13:44:58Z
 Host: Linux 6.8.0-49-generic x86_64
 CMake: 3.22.1
 CMake generator: Unix Makefiles
 CMake build tool: /usr/bin/gmake
 Configuration: RELEASE

 CPU/HW features:
 Baseline: SSE SSE2 SSE3
 requested: SSE3
 Dispatched code generation: SSE4_1 SSE4_2 FP16 AVX AVX2 AVX512_SKX
 requested: SSE4_1 SSE4_2 AVX FP16 AVX2 AVX512_SKX
 SSE4_1 (18 files): + SSSE3 SSE4_1
 SSE4_2 (2 files): + SSSE3 SSE4_1 POPCNT SSE4_2
 FP16 (1 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 AVX
 AVX (8 files): + SSSE3 SSE4_1 POPCNT SSE4_2 AVX
 AVX2 (37 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2
 AVX512_SKX (8 files): + SSSE3 SSE4_1 POPCNT SSE4_2 FP16 FMA3 AVX AVX2 AVX_512F AVX512_COMMON AVX512_SKX

 C/C++:
 Built as dynamic libs?: NO
 C++ standard: 11
 C++ Compiler: /usr/bin/c++ (ver 10.5.0)
 C++ flags (Release): -fsigned-char -ffast-math -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG -DNDEBUG
 C++ flags (Debug): -fsigned-char -ffast-math -W -Wall -Wreturn-type -Wnon-virtual-dtor -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -fvisibility-inlines-hidden -g -O0 -DDEBUG -D_DEBUG
 C Compiler: /usr/bin/cc
 C flags (Release): -fsigned-char -ffast-math -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -O3 -DNDEBUG -DNDEBUG
 C flags (Debug): -fsigned-char -ffast-math -W -Wall -Wreturn-type -Waddress -Wsequence-point -Wformat -Wformat-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -Wno-long-long -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections -msse -msse2 -msse3 -fvisibility=hidden -g -O0 -DDEBUG -D_DEBUG
 Linker flags (Release): -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined 
 Linker flags (Debug): -Wl,--exclude-libs,libippicv.a -Wl,--exclude-libs,libippiw.a -Wl,--gc-sections -Wl,--as-needed -Wl,--no-undefined 
 ccache: NO
 Precompiled headers: NO
 Extra dependencies: /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib/x86_64-linux-gnu/libpng.so /usr/lib/x86_64-linux-gnu/libtiff.so /usr/lib/x86_64-linux-gnu/libz.so /usr/lib/x86_64-linux-gnu/libfreetype.so /usr/lib/x86_64-linux-gnu/libharfbuzz.so Iconv::Iconv m pthread cudart_static dl rt nppc nppial nppicc nppidei nppif nppig nppim nppist nppisu nppitc npps cublas cudnn cufft -L/usr/lib/x86_64-linux-gnu -L/usr/lib/cuda/lib64
 3rdparty dependencies: libprotobuf ade ittnotify libwebp libopenjp2 IlmImf quirc ippiw ippicv

 OpenCV modules:
 To be built: aruco bgsegm bioinspired calib3d ccalib core cudaarithm cudabgsegm cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev datasets dnn dnn_objdetect dnn_superres dpm face features2d flann freetype fuzzy gapi hfs highgui img_hash imgcodecs imgproc intensity_transform line_descriptor mcc ml objdetect optflow phase_unwrapping photo plot python3 quality rapid reg rgbd saliency shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab wechat_qrcode xfeatures2d ximgproc xobjdetect xphoto
 Disabled: cudacodec world
 Disabled by dependency: -
 Unavailable: alphamat cvv hdf java julia matlab ovis python2 sfm viz
 Applications: tests perf_tests examples apps
 Documentation: NO
 Non-free algorithms: NO

 GUI: GTK2
 QT: NO
 GTK+: YES (ver 2.24.33)
 GThread : YES (ver 2.72.4)
 GtkGlExt: NO
 OpenGL support: NO
 VTK support: NO

 Media I/O: 
 ZLib: /usr/lib/x86_64-linux-gnu/libz.so (ver 1.2.11)
 JPEG: /usr/lib/x86_64-linux-gnu/libjpeg.so (ver 80)
 WEBP: build (ver encoder: 0x020f)
 PNG: /usr/lib/x86_64-linux-gnu/libpng.so (ver 1.6.37)
 TIFF: /usr/lib/x86_64-linux-gnu/libtiff.so (ver 42 / 4.3.0)
 JPEG 2000: build (ver 2.5.0)
 OpenEXR: build (ver 2.3.0)
 HDR: YES
 SUNRASTER: YES
 PXM: YES
 PFM: YES

 Video I/O:
 DC1394: NO
 FFMPEG: YES
 avcodec: YES (58.134.100)
 avformat: YES (58.76.100)
 avutil: YES (56.70.100)
 swscale: YES (5.9.100)
 swresample: YES (3.9.100)
 GStreamer: YES (1.20.3)
 v4l/v4l2: YES (linux/videodev2.h)

 Parallel framework: TBB (ver 2021.5 interface 12050)

 Trace: YES (with Intel ITT)

 Other third-party libraries:
 Intel IPP: 2021.8 [2021.8.0]
 at: /home/alperenlcr/SourceInstalls/opencv/build/3rdparty/ippicv/ippicv_lnx/icv
 Intel IPP IW: sources (2021.8.0)
 at: /home/alperenlcr/SourceInstalls/opencv/build/3rdparty/ippicv/ippicv_lnx/iw
 VA: NO
 Lapack: NO
 Eigen: NO
 Custom HAL: NO
 Protobuf: build (3.19.1)
 Flatbuffers: builtin/3rdparty (23.5.9)

 NVIDIA CUDA: YES (ver 11.5, CUFFT CUBLAS NVCUVID NVCUVENC FAST_MATH)
 NVIDIA GPU arch: 86
 NVIDIA PTX archs:

 cuDNN: YES (ver 8.6.0)

 OpenCL: YES (no extra features)
 Include path: /home/alperenlcr/SourceInstalls/opencv/3rdparty/include/opencl/1.2
 Link libraries: Dynamic load

 ONNX: NO

 Python 3:
 Interpreter: /usr/bin/python3 (ver 3.10.12)
 Libraries: /usr/lib/x86_64-linux-gnu/libpython3.10.so (ver 3.10.12)
 numpy: /usr/lib/python3/dist-packages/numpy/core/include (ver 1.21.5)
 install path: lib/python3.10/dist-packages/cv2/python-3.10

 Python (for build): /usr/bin/python3

 Java: 
 ant: NO
 Java: NO
 JNI: NO
 Java wrappers: NO
 Java tests: NO

 Install to: /usr/local
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