I would like to play a separate video stream and audio stream simultaneously from the Linux command line, using e.g. cvlc or mpv.
More specifically, I would like to play a youtube video in high quality format, using youtube-dl along with a player.
More details:
I am using this command to playback a youtube video on my pc:
youtube-dl -i <youtube.com/url> -o - | mpv -
Lets say I have following formats for a youtube video available:
249 webm audio only tiny 62k , opus # 50k (48000Hz), 14.14MiB
251 webm audio only tiny 158k , opus #160k (48000Hz), 35.68MiB
303 webm 1920x1080 1080p60 4429k , vp9, 60fps, video only, 536.78MiB
299 mp4 1920x1080 1080p60 6901k , avc1.64002a, 60fps, video only, 884.09MiB
22 mp4 1280x720 720p 1339k , avc1.64001F, 30fps, mp4a.40.2#192k (44100Hz) (best)
youtube-dl would automatically choose the last entry of this list, as it is a format that includes video and audio in one file.
Is there a way I can play the formats 303 and 251 on my pc?
If I would like to download them I would use:
youtube-dl -i <youtube.com/url> -f 303+bestaudio
What youtube-dl does in this case is to download the video and the audio file seperately and merges them into one file using ffmpeg.
But I can't figure if there is a possibility to playback both streams without first downloading them into a file.
Alright I think I figured a solution.
The command I use is as follows:
ffmpeg -loglevel quiet -i $(youtube-dl -g youtube.com/url -f 303) -i $(youtube-dl -g youtube.com/url -f bestaudio) -f matroska -c copy - | mpv -
The youtube-dl -g option would just return the url to the video or audio stream.
In this case it will pass the urls to ffmpeg which is doing the merging process.
-f matroska tells ffmpeg to use the mkv container format
-c copy says that no re-encoding should be done
edit:
For some reason, on my systemm the input is broken after ffmpeg exits. For now I resolve this by typing reset, until I find a better solution to this issue.
I have a dummy client that is suppose to simulate a video recorder, on this client i want to simulate a video stream; I have gotten so far that i can create a video from bitmap images that i create in code.
The dummy client is a nodejs application running on an Raspberry Pi 3 with the latest version of raspian lite.
In order to use the video I have created, I need to get ffmpeg to dump the video to pipe:1. The problem is that I need the -f rawvideo as a input parameter, else ffmpeg can't understand my video, but when i have that parameter set ffmpeg refuses to write anything to stdio
ffmpeg is running with these parameters
ffmpeg -r 15 -f rawvideo -s 3840x2160 -pixel_format rgba -i pipe:0 -r 15 -vcodec h264 pipe:1
Can anybody help with a solution to my problem?
--Edit
Maybe i sould explain a bit more.
The system i am creating is to be set up in a way, where instead of my stream server ask the video recorder for a video stream, it will be the recorder that tells the server that there is a stream.
I have have slowed my problem on my own. (-:
i now have 2 solutions.
Is to change my -f rawvideo to -f data that works for me anyways.
I can encode my bitmaps as jpeg in code and pipe my jpeg images to stdin. This also requires me to change the ffmpeg parameters to -r 4 -f mjpeg -i pipe:0 -r 4 -vcodec copy -f mjpeg pipe:1 and is by far the slowest thing i have ever done. and i can't use a 4k input
thanks #Mulvya for trying to help.
#eFox Thanks for editing my stupid spelling and grammar mistakes
Hi I a have a question I have openCV and ffmpeg on the Raspberry Pi and I am trying to stream live video from the raspberry pi. At the moment I have the output output of openCV saving as a .avi file and I have a command for ffmpeg
ffmpeg -i out.avi -hls_segment_filename '%03d.ts' stream.m3u8
This Command take the output creates the playlist(.m3u8) and the segments(.ts).
At present I have openCV programmed in C++ (this can not change) I have an executable programmed from this and I have both the executable C++ and the above ffmpeg in a Bash Script.
#!/bin/bash
while true; do
./OpenCV
ffmpeg -i out.avi -hls_segment_filename '%03d.ts' stream.m3u8
done
This does allow me to stream the processed openCV video my issue is as the Bash script is in a while loop it keeps resetting the playlist and the .ts files, so i have to constantly press play on the client connection.
Is there anyway around this?
I tried including a variable that would increment every loop but if i replace '%03d' with this i get an error.
If you insist on using your program (OpenCV) and ffmpeg in a loop then you can specify the initial hls sequence number for stream.m3u8 using start_number. Something like this:
... as before ...
ffmpeg -i out.avi -hls_segment_filename '%03d.ts' --start_number $I stream.m3u8
where I is a variable that you have to increment each time the loop runs.
But this approach is very fragile and will probably result in an incorrect stream because it assumes that ffmpeg will produce only a single segment but in reality it will probably produce multiple segments.
A much better approach is to run OpenCV and ffmpeg in parallel and make them talk to each other. By doing so there will be no need to write to a temporary file out.avi and run OpenCV and ffmpeg in sequences and keep the media sequences synchronized.
I think you can hack it like this. Note that you may need to change OpenCV so that it writes constantly to out.avi and does not return after a while:
./OpenCV &
tail -n +0 -f out.avi | ffmpeg -i pipe:0 -hls_segment_filename '%03d.ts' stream.m3u8
A better approach is change your program to write to stdout or to a named pipe and run it like so:
./OpenCV | ffmpeg -i pipe:0 -hls_segment_filename '%03d.ts' stream.m3u8
I am trying to concatenate video files so that next one follows the one before it when it is played. The formatting for all of the files are the same. The files all have audio & video.
I think I am very close (hopefully!) to getting this to work, but I have one final problem. The command below takes all of the mp4 files in my folder and creates a big mp4 file, which is the right size in total MB, but the images for all videos after the first video are garbled. The audio is okay (continues just fine from video to video). Also, I don't get any error messages.
ffmpeg -f concat -i <(for f in /folder1/*.mp4; do echo "file '$f'"; done) -c copy /folder1/all.mp4
I'm not very familiar with ffmpeg yet, so I've just been trying the different suggestions I've found on the web. Can anyone suggest other things for me to try? (I've tried reading the FAQs, but I have to confess that I don't fully understand it. Also, there seems to be some posts about audio being missing after concatenation, but I haven't seen anything on images being garbled.) Thx in advance!
I have had good luck using this ... avconv is a fork of ffmpeg
avconv -i 1.mp4 1.mpeg
avconv -i 2.mp4 2.mpeg
avconv -i 3.mp4 3.mpeg
cat 1.mpeg 2.mpeg 3.mpeg | avconv -f mpeg -i - -vcodec mpeg4 -strict experimental output.mp4
I'm working on a music VOD app on iPhone, and thanks to Apple guidelines, I have to run a HTTP Live Streaming in order to be accepted on the AppStore. But, since Apple doesn't care about 98% of servers on earth, they don't provide their so magical HTTP Live Streaming Tools for Linux-based systems. And from this point, the nightmare starts.
My goal is simple : Take an MP3, segmentate it and generate a simple .m3u8 index file.
I googled "HTTP Live Streaming Linux" and "Oh great ! lots of people have already done that"!
First, I visited the (so famous) post by Carson McDonald.
Result : the svn segmentate.c was old, buggy and a nightmare to compile (Nobody in this world can precise what version of ffmpeg they are using !).
Then I came across the Carson's git repo, but too bad, there is a lot of annoying ruby stuff and live_segmenter.c can't take mp3 files.
Then I searched more deeply. I found this stackoverflow topic, and it's exactly what I want to do. So I have followed the advice from juuni to use this script (httpsegmenter). Result: Impossible to compile anything, 2 days of works and finally I managed to compile it (ffmpeg 8.1 w/ httpsegmenter rev17). And no, this is not a good script, it does take mp3 files, but the ts files generated and the index file can't be read by a player.
Then the author of the post krisbulman, came with a solution, and even gave a patched version of m3u8-segmenter by his own (git repo). I test it : doesn't compile, do nothing. So I took the original version from johnf https://github.com/johnf/m3u8-segmenter. I managed to compile and miracle it works (not really).
I used this command line (ffmpeg 0.8.1):
ffmpeg -er 4 -i music.mp3 -f mpegts -acodec libmp3lame -ar 44100 -ab 128k -vn - | m3u8-segmenter -i - -d 10 -p outputdir/prefix -m outputdir/output.m3u8 -u http://test.com/
This script encode my mp3 file (it takes 4 seconds, too long), and pass it to the m3u8-segmenter to segment it into 10 seconds .TS files.
I tested this stream with Apple's mediastreamvalidator on my mac, and it said that it was OK. So i played it into quicktime, but there is about 0.2 seconds blank between each .TS files !!
So here is my situation, it's a nightmare, I can't get a simple mp3 stream over the HLS protocol. Is there a simple WORKING solution to segmentate a mp3 ? Why can't I directly segmentate the mp3 file into multiple mp3 files like Apple's mediafilesegmenter does?
Use libfaac insteam of libmp3lame which eliminates the 0.2 second break.
Elastic Transcoder Service - if you don't need AES encryption just throw your MP3 in an S3 bucket and be done with it:
http://aws.amazon.com/elastictranscoder/
You can then even add Cloudfront CDN support. (P.S. I fully appreciate your pain, this whole space is a nightmare).
For live streaming only, you should try Nginx with RTMP module for this one. https://github.com/arut/nginx-rtmp-module
Live HLS works pretty good but with looooong buffer.
However, it does not support on-demand HLS streaming.
Piece of module`s config for example
# HLS requires libavformat & should be configured as a separate
# NGINX module in addition to nginx-rtmp-module:
# ./configure ... --add-module=/path/to/nginx-rtmp-module/hls ...
# For HLS to work please create a directory in tmpfs (/tmp/app here)
# for the fragments. The directory contents is served via HTTP (see
# http{} section in config)
#
# Incoming stream must be in H264/AAC/MP3. For iPhones use baseline H264
# profile (see ffmpeg example).
# This example creates RTMP stream from movie ready for HLS:
#
# ffmpeg -loglevel verbose -re -i movie.avi -vcodec libx264
# -vprofile baseline -acodec libmp3lame -ar 44100 -ac 1
# -f flv rtmp://localhost:1935/hls/movie
#
# If you need to transcode live stream use 'exec' feature.
#
application hls {
live on;
hls on;
hls_path /tmp/app;
hls_fragment 5s;
}
What problems were you having with httpsegmenter? It's a single C source file that only links against some libraries provided by ffmpeg (or libav). I maintain a Gentoo ebuild for it, as I use it to time-shift talk radio. If you're running Gentoo, building is as simple as this:
sudo bash -l
layman -S
layman -a salfter
echo media-video/httpsegmenter ~\* >>/etc/portage/package.accept_keywords
emerge httpsegmenter
exit
On Ubuntu, I had to make sure libavutil-dev and libavformat-dev were both installed, so the build looks something like this:
sudo apt-get install libavutil-dev libavformat-dev
git clone https://gitlab.com/salfter/httpsegmenter.git
cd httpsegmenter
make -f Makefile.txt
sudo make -f Makefile.txt install
Once it's built (and once I have an audio source URL), usage is fairly simple: curl to stream the audio, ffmpeg to transcode it from whatever it is at the source (often MP3) to AAC, and segmenter to chunk it up:
curl -m 3600 http://invalid.tld/stream | \
ffmpeg -i - -acodec libvo_aacenc -ac 1 -ab 32k -f mpegts - 2>/dev/null | \
segmenter -i - -d 20 -o ExampleStream -x ExampleStream.m3u8 2>/dev/null
This grabs one hour of streaming audio (needs to be MP3 or AAC, not Flash), transcodes it to 32 kbps mono AAC, and chunks it up for HTTP live streaming. Have it dump into a directory served up by your webserver and you're good to go.
Once the show's done, converting to a single .m4a that can be served up as a podcast is also simple:
cat `ls -rt ExampleStream-*.ts` | \
ffmpeg -i - -acodec copy -absf aac_adtstoasc ExampleStream.m4a 2>/dev/null
I know this is an old question, but I am using this in VLC:
## To start playing the playlist out to the encoder
cvlc -vvv playlist.m3u --sout rtp:127.0.0.1 --ttl 2
## To start the encoder
cvlc rtp:// --sout='#transcode{acodec=mp3,ab=96}:duplicate{dst=std{access=livehttp{seglen=10,splitanywhere=true,delsegs=true,numsegs=15,index=/var/www/vlctest/mystream.m3u8,index-url=http://IPANDPORT/vlctest/mystream-########.ts},mux=ts,dst=/var/www/vlctest/mystream-########.ts},select=audio}'
I had problems if I didn't stream the playlist file to another copy of VLC, the first step is optional if you already have a live streaming source. (but you can use any source for the "encoder" portion).
You could try to use our media services on Windows Azure platform: http://mingfeiy.com/how-to-generate-http-live-streaming-hls-content-using-windows-azure-media-services/
You could encode and stream your video in HLS format by using our portal with no configuration and coding required.
Your English is fine.
Your frustration is apparent.
Q: What's the real issue here? It sounds like you just need a working HLS server, correct? Because of Apple requirements, correct?
Can you use any of the ready-made implementations listed here:
http://en.wikipedia.org/wiki/HTTP_Live_Streaming