I'm trying to capture a video using vlc.
The procedure is standard using the GUI :
enter the url e.g http://some_site_some_video.mp4/playlist.m3u8 in the network protocol capture device tool (ctrl+n) in the next screen enter the path so save the file and that's it.
Tried using VLC docs, and the closest command I found was vlc -I dummy -vvv input_stream --sout
but
vlc -I dummy -vvv http://some_site_some_video.mp4/playlist.m3u8 --sout home/me/videos
Didn't work.
Is it the right command to use?
Related
I am chasing a command line vlc conversion (mp4 and wav to mp3) . The problem is that vlc creates a zero byte output file.
I have tried the -vv and -vvv options, hoping vlc would give me a hint about what is going on, but the presence of these switches does nothing.
How to get some hints from vlc?
Example command line:
vlc.exe -I -vvv dummy "c:\temp\test\arc\test.aac" --sout=#transcode{acodec=mp3,ab=48,channels=2,samplerate=192000}:standard{access=file,mux=ts,dst="C:\data\personal\test\cardbuilding\audio-files\hinative\test2.mp3"} vlc://quit
OK, found out how to get detailed logging for VLC when it runs from a command line.
Open VLC interactively
Tools | Preferences | All (radio at bottom)
Advanced | Logger
Turn on logging, set file, set detail level
Close VLC
Now when you use the vlc.exe command line, you will get a log.
Alternate method (better, as all control remains on the cmd line, but not yet tested by me):
vlc --file-logging --logfile abc.txt --log-verbose 3
(where 3 = Debug)
That is the good news.
The bad news is... at least in my case, the logged information is not helping me figure out the problem.
I have MPEG-TS H.264 video stream of Live TV Channel, I want to Live Stream it for iPhone but as HLS requires to make segments (e.g.: 10s) segment and send it using M3u8. and for this purpose I am currently using ffmpeg and m3u8-segmenter available on internet. But I do not want to use transcoding using ffmpeg as i have memory + processor limitations on my hardware. Is it possible that i can only make segments of the MPEG-TS video and directly send it to the iPhone.
I have tried many ways but unable to do so. I am using Linux based system.
Please help me, what are the procedures of live streaming to iphone without transcoding the video.
Thanks
The best way to go about this is to cut out FFmpeg entirely. Although you can coerce FFmpeg to not transcode (by using -c copy), since the video is already in MPEG-TS format straight off of the livestream, it's best to use it directly.
Since it looks like the video is coming over HTTP, you can use curl to print it to stdout:
curl http://localhost:6954/myvideo.ts | ./m3u8-segmenter -i - -d 10 -p outputdir/prefix -m outputdir/output.m3u8 -u http://domain.com
Or if you want to use wget instead of curl, it's similar
wget -O - http://localhost:6954/myvideo.ts | ./m3u8-segmenter -i - -d 10 -p outputdir/prefix -m outputdir/output.m3u8 -u http://domain.com
Either wget or curl will likely already be installed on your system.
I have an audio stream
cvlc -vvv alsa://hw:1,0 --sout '#transcode{acodec=mp3,ab=128}:standard{access=http,mux=ogg,dst=192.168.0.106:8081}'
and it works if i logged in KDE, but if i see login window (where you need to type password kde login) i cannot open alsa device.
I got
vlc cannot open MRL 'alsa://hw:1,0'.
Is it possible to have access to alsa without login to KDE?
Any suggestions are welcomed.
alsa is KDE independent; before logging in, from a console (ctrl+alt+F1) use this command: aplay -l, it will show all audio devices; I think kde has some script to change the soundcard stack
I have a problem with recording rtsp stream with VLC player. Actually my method works in MacOS X, but doesn't in Windows. Command line:
vlc -vvv rtsp://admin:admin#192.168.0.151/live/h264/ --sout="#transcode{vcodec=mp4v,vfilter=canvas{width=800,height=600}}:std{access=file,mux=mp4,dst=C:\123.mp4}"
On MacOS it works fine, but under Windows it creates unreadable file. MediaInfo output:
General
Complete name : C:\123.mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 1.08 MiB
Any suggestions?
Seems like your destination URL is not correct. Try this:
vlc -vvv rtsp://admin:admin#192.168.0.151/live/h264/ --sout="#transcode{vcodec=mp4v,vfilter=canvas{width=800,height=600}}:std{access=file,mux=mp4,dst=C:\\123.mp4}"
For Linux users, ffmpeg alone works straight away.
If you want to watch the stream while recording, write to a .mkv instead of a .mp4.
This example will overwrite the file video.mp4 in your home folder without asking due to the -y param, and the original codecs are kept.
ffmpeg -i rtsp://192.168.42.1/live -vcodec copy -acodec copy -y ~/video.mp4
NB: This example url is for an Ambarella Xiaomi Mijia 4K camera, like many wifi ip cameras, you have to activate the stream via telnet first, for this particular model the command to be sent before reading the stream via rtsp://:
echo '{"msg_id":257,"token":0}' | telnet 192.168.42.1 7878
Why won't this produce a file? It does everything right but saving to an actual file .. I am using Linux, Vlc 1.1.9, compiled without skins2, qt or ncurses interfaces...
vlc :sout=#transcode{vcodec=mp4,acodec=mp4a,vb=800,scale=1}:std{access=file,mux=mp4,dst="~/file.mp4"} screen:// screen-fps=12 screen-caching=100
Note this also does the same thing - shows the screen:// fine, but will not output to a file:
vlc :sout=#transcode{vcodec=h264,acodec=none,vb=800}:std{access=file,mux=avi,dst="/root/file.avi"} screen:// screen-fps=12 screen-caching=100
Try this
vlc -vvv (PORT (UDP, HTTP)) --ts-dump-file video.ts and add more commands
vlc -vvv (PORT (UDP, HTTP)) --sout-all file/ogg,mpg,ts:filename and add more commands
Thats above code shuld work!