I'm attempting to stream an h264 encoded video using gstreamer and tcp. The command is:
gst-launch-1.0 videotestsrc is-live=true ! videoconvert ! videoscale ! video/x-raw,width=800,height=600 ! x264enc key-int-max=12 ! rtph264pay config-interval=1 pt=96 ! gdppay ! tcpserversink port=5000
gop size is set to 12, and configuration sent every second. I can't receive this stream using vlc (neither on the same machine nor on other machine). The command on vlc is:
vlc rtp://localhost:5000
but nothing showed. Anyone can help ?
regards
wrap the stream up in some container like mpegts
gst-launch-1.0 -v videotestsrc ! x264enc key-int-max=12 byte-stream=true ! mpegtsmux ! tcpserversink port=8888 host=localhost
now in vlc using tcp://localhost:8888
Related
I need to compile a PDF from my code. I first tried by installing tinytex. Unfortunately, tinytex couldn't compile and the error I got was "pdflatex not found". I looked through the bin directory of tinytex folder and there was no pdflatex.exe there.
So, I uninstalled tinytex, and instead have now installed the full Tex Live 2020 from tug.org. Now, I can see that there is a pdflatex.exe in the bin directory of tex live.
I am not able to figure out how to use tex live in R Studio. How do I link it to R, and what functions/ commands do I enter in R console for compilation. I have not been able to find anything related in the instructions in the tug site/ generally on Google.
I am on Windows 10.
Appreciate any help.
Thanks.
Update:
I set up the path to the bin directory of texlive in Windows-Advanced System Settings, and tried to compile a PDF from markdown again. Unfortunately, while the texlive path is now captured by R environment, compilation still does not work. The log created reads as follows:
! fmtutil: fmtutil is using the following fmtutil.cnf files (in precedence order):
! fmtutil: fmtutil is using the following fmtutil.cnf file for writing changes:
! fmtutil: c:/users/h a/.texlive2020/texmf-config/web2c/fmtutil.cnf
! fmtutil [INFO]: writing formats under c:/users/h a/.texlive2020/texmf-var/web2c
! fmtutil [INFO]: did not find entry for byfmt=pdflatex, skipped
! fmtutil [INFO]: total formats: 0
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! kpathsea: Running mktexfmt pdflatex.fmt
! The command name is C:\texlive\2020\bin\win32\mktexfmt
The runtime log in RStudio is as follows:
! fmtutil: fmtutil is using the following fmtutil.cnf files (in precedence order):
! fmtutil: fmtutil is using the following fmtutil.cnf file for writing changes:
! fmtutil: c:/users/h a/.texlive2020/texmf-config/web2c/fmtutil.cnf
! fmtutil [INFO]: writing formats under c:/users/h a/.texlive2020/texmf-var/web2c
! fmtutil [INFO]: did not find entry for byfmt=pdflatex, skipped
! fmtutil [INFO]: total formats: 0
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! fmtutil: fmtutil is using the following fmtutil.cnf file for writing changes:
! fmtutil: c:/users/h a/.texlive2020/texmf-config/web2c/fmtutil.cnf
! fmtutil [INFO]: writing formats under c:/users/h a/.texlive2020/texmf-var/web2c
! fmtutil [INFO]: did not find entry for byfmt=pdflatex, skipped
! fmtutil [INFO]: total formats: 0
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! fmtutil: c:/users/h a/.texlive2020/texmf-config/web2c/fmtutil.cnf
! fmtutil [INFO]: writing formats under c:/users/h a/.texlive2020/texmf-var/web2c
! fmtutil [INFO]: did not find entry for byfmt=pdflatex, skipped
! fmtutil [INFO]: total formats: 0
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! fmtutil [INFO]: writing formats under c:/users/h a/.texlive2020/texmf-var/web2c
! fmtutil [INFO]: did not find entry for byfmt=pdflatex, skipped
! fmtutil [INFO]: total formats: 0
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! fmtutil [INFO]: did not find entry for byfmt=pdflatex, skipped
! fmtutil [INFO]: total formats: 0
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! fmtutil [INFO]: total formats: 0
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! fmtutil [INFO]: exiting with status 0
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! Running the command C:\texlive\2020\bin\win32\fmtutil-user.exe
! kpathsea: Running mktexfmt pdflatex.fmt
! The command name is C:\texlive\2020\bin\win32\mktexfmt
Error: LaTeX failed to compile a.tex. See https://yihui.org/tinytex/r/#debugging for debugging tips. See a.log for more info.
Execution halted
Update 2
Ok. So I don't know how, but fmtutil -sys -all did the trick. Looks like bad installation. Not sure. Able to make the pdfs now, but code text wrapping is so tacky. Used knittr options setting, but it fails at places.
Hi I am trying to open a video file using opencv with gstreamer support in python. The idea is to grab frames from the file and to simultaneously pass it to my python3 application for processing while also encoding it into h264 and sending it to a udpsink. Each of these streams work when being run independently but I run into errors when trying to run it together. This pipeline works if I pull from a web camera instead of a filesrc.
The code that I used to open the cv2.VideoCapture is below. I am running this on a TX2 with Jetpack 4.3 and a recompiled Opencv 4.1.1
video_stream = cv2.VideoCapture("filesrc location=video.mp4 ! \
qtdemux name=demux demux.video_0 ! h264parse ! omxh264dec ! tee name=t \
t. ! queue leaky=downstream ! nvvidconv flip-method=0 ! video/x-raw, format=(string)BGRx ! videoconvert ! video/x-raw, format=(string)BGR ! appsink \
t. ! queue leaky=downstream ! nvvidconv ! video/x-raw(memory:NVMM), width=(int)320, height=(int)240 ! omxh264enc ! video/x-h264, streamformat=byte-stream ! h264parse ! rtph264pay config-interval=1 pt=96 ! udpsink host=192.168.1.1 port=1234")
The error I get is as follows
[ WARN:0] global /usr/local/src/opencv-4.1.1/modules/videoio/src/cap_gstreamer.cpp (1757) handleMessage OpenCV | GStreamer warning: Embedded video playback halted; module demux reported: Internal data stream error.
[ WARN:0] global /usr/local/src/opencv-4.1.1/modules/videoio/src/cap_gstreamer.cpp (886) open OpenCV | GStreamer warning: unable to start pipeline
[ WARN:0] global /usr/local/src/opencv-4.1.1/modules/videoio/src/cap_gstreamer.cpp (480) isPipelinePlaying OpenCV | GStreamer warning: GStreamer: pipeline have not been created
Any suggestions on how I should proceed? Thanks!
I figured it out. I need to add another nvvidconv before the tee. Not sure exactly why, but it allows the entire pipeline to flow correctly.
video_stream = cv2.VideoCapture("filesrc location=video.mp4 ! \
qtdemux name=demux demux.video_0 ! h264parse ! omxh264dec ! nvvidconv ! tee name=t \
t. ! queue leaky=downstream ! nvvidconv flip-method=0 ! video/x-raw, format=(string)BGRx ! videoconvert ! video/x-raw, format=(string)BGR ! appsink \
t. ! queue leaky=downstream ! nvvidconv ! video/x-raw(memory:NVMM), width=(int)320, height=(int)240 ! omxh264enc ! video/x-h264, streamformat=byte-stream ! h264parse ! rtph264pay config-interval=1 pt=96 ! udpsink host=192.168.1.1 port=1234")
Can anyone help me generate a GStreamer pipeline to create an encrypted hls stream? I have been able to do the following which works well but I would like to add encryption to the final output.
gst-launch-1.0 -v souphttpsrc location=http://192.168.1.20/1.ts ! tsdemux program-number=1 name=tsmux tsmux.video_0_0044 ! queue ! muxer. tsmux.audio_0_0045 ! queue ! aacparse ! muxer. mpegtsmux name=muxer ! hlssink location="test/hlssink.%05d.ts" playlist-location="test/playlist.m3u8" max-files=6 target-duration=6
I am working on a script to upgrade firmware on a network switch. There are two commands that need to be ran but they have to wait for the other one to finish. I have used the after command but I am just taking a guess on the timing. Is there a way that when the switch comes back with 'TFTP to Flash Done.' it moves on to the next command?
Here is my command so far
CLI enable
CLI $deviceLogin
CLI $deviceEnablePwd
CLI copy tftp flash $tftpIP kxz10105.bin bootrom
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
after 120000
CLI copy tftp flash $tftpIP ICX64S08030h.bin primary
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
CLI !
after 180000
CLI show clock
CLI reload after 00:00:01
I want to take a h264 video, decode it, re-encode it in mjpeg and stream it over tcp.
For this, I use a raspivid video caputre which give a h264 output video piped with Gstreamer which decode, re-encode and transmit using tcp:
raspivid -n -t 0 -b 7000000 -fps 25 -o - | \
gst-launch-1.0 fdsrc ! video/x-h264,framerate=25/1,stream-format=byte-stream ! decodebin ! videorate ! video/x-raw,framerate=10/1 ! \
videoconvert ! jpegenc ! tcpserversink host=192.168.24.5 port=5000 &
To receive I use:
gst-launch-1.0 tcpclientsrc host=192.168.24.5 port=5000 ! jpegdec ! autovideosink
On my tcp server my CPU work at 90% and I have no error. We could think it's ok, but ...
On my tcp client I have this error:
ERROR: from element /GstPipeline:pipeline0/GstTCPClientSrc:tcpclientsrc0: Internal data flow error.
Additional debug info:
gstbasesrc.c(2865): gst_base_src_loop (): /GstPipeline:pipeline0/GstTCPClientSrc:tcpclientsrc0:
streaming task paused, reason not-negotiated (-4)
ERROR: pipeline doesn't want to preroll.
Did you have any ideas why my pipeline is broken ?
Tried adding a videoconvert before the videosink yet?
Also, you should specify the caps for the tcp source as the second pipeline needs to know at least the framerate. I'd do something like:
gst-launch-1.0 tcpclientsrc host=192.168.24.5 port=5000 ! image/jpeg, framerate=25/1 ! jpegparse ! jpegdec ! queue ! videoconvert ! autovideosink
If that still doesn't work, a GST_DEBUG=6 log from the receiving pipeline should help pinpointing the issue.