I am trying to pull video streams from Youtube and repackage it into MPEG2 TS container.Youtube streams audio(.m4a) and video(.mp4) as separate streams and packages into mp4 container format at the client end.Are there any ffmpeg libraries or any tools which packages the individual streams into MPEG2-TS container?
Yes, ffmpeg has an mpegts option. First, you will need to merge your audio and video. There is a great answer on Super User on how to merge audio and video so I will not steal the answerer's rep by copying it.
Once you have your combined video, you can convert files to MPEG-TS like this:
ffmpeg -i input.avi -f mpegts -vcodec mpeg2video -sameq output.ts
(source, I have no affiliation)
Related
I have two video files on my iPhone. Is it possible, using Dart, to find two specific 10-second segments in each, and merge them both into a valid 20 second video file?
Ok, so there's a FFMpeg plugin for flutter that allows you to do all of this.
https://github.com/tanersener/flutter-ffmpeg
Cutting a 15 second video segment starting at second 20:
ffmpeg -i Funny.mkv -ss 00:00:20 -codec copy -t 15 Funny_cut.mkv
Merging a list of videos that is stored in videos.txt:
ffmpeg -f concat -i videos.txt -c copy Funny_join.mkv
For more about FFMpeg:
https://www.poftut.com/ffmpeg-command-tutorial-examples-video-audio/
I am trying to transfer a bunch of images as a video. What I am doing is simply muxing these static images into a video using the following commands.
ffmpeg -framerate 1 -i %02d.jpg -codec copy 1.mkv
After this, I verify the integrity of my static images and the frames in the video using -
ffmpeg -i %02d.jpg -f framehash -
and
ffmpeg -i 1.mkv -map 0:v -f framehash -
I get the same hashes so it means I have archived the images properly. Now next I send this video to my friend who extracts the frames using -
ffmpeg -i 1.mkv mkv%02d.jpg
Now after extracting the hashes don't remain the same that means the integrity is lost.
How to extract the frames as it is so that integrity is not lost?
Also if you any other way to achieve what I am trying, please advice.
Here are the hashes.
The command
ffmpeg -i 1.mkv mkv%02d.jpg
doesn't "extract" the JPEGs. It decodes the stored frames and re-encodes them using the MJPEG encoder.
Use
ffmpeg -i 1.mkv -c copy mkv%02d.jpg
I am trying to download all the videos from the playlist:
I am using youtube-dl for this and the command is:
youtube-dl -citk –format mp4 –yes-playlist https://www.youtube.com/watch?v=7Vy8970q0Xc&list=PLwJ2VKmefmxpUJEGB1ff6yUZ5Zd7Gegn2
But this only downloads the first video. Not sure what I am doing wrong.
In a shell, & is a special character, advising the shell to start everything up to the & as a process in the background. To avoid this behavior, you can put the URL in quotes. See the youtube-dl FAQ for more information.
Also beware of -citk. With the exception of -i, these options make little sense. See the youtube-dl FAQ for more information. Even -f mp4 looks very strange.
So what you want is:
youtube-dl -i -f mp4 --yes-playlist 'https://www.youtube.com/watch?v=7Vy8970q0Xc&list=PLwJ2VKmefmxpUJEGB1ff6yUZ5Zd7Gegn2'
Alternatively, you can just use the playlist ID:
youtube-dl -i PLwJ2VKmefmxpUJEGB1ff6yUZ5Zd7Gegn2
I found the best solution after many attempts at solving this problem.
Installation and usage;
For Windows users:
Script:
youtube-dl --ignore-errors --format bestaudio --extract-audio --audio-format mp3 --audio-quality 160K --output "%(title)s.%(ext)s" --yes-playlist https://www.youtube.com/playlist?list={your-youtube-playlist-id}
Download youtube-dl.exe file from the offical site.
Dowload ffmpeg from the offical site for convert WebM to MP3 (Recomended build version)
Exctract all zip files and move youtube-dl.exe, ffmpeg.exe and ffprobe.exe files to the folder that where you want the downloaded MP3 files.
Open cmd (Windows terminal) in same folder.
Replace the script {your-youtube-playlist-id} parameter with your YouTube playlist id.
Run the script.
For macOS/Linux users:
Script:
youtube-dl --ignore-errors --format bestaudio --extract-audio --audio-format mp3 --audio-quality 160K --output "%(title)s.%(ext)s" --yes-playlist 'https://www.youtube.com/playlist?list={your-youtube-playlist-id}'
Open terminal and if you don't have Homebrew, install it. (Linux users can skip this step.)
Run brew install youtube-dl ffmpeg and install youtube-dl and ffmpeg for convert WebM to MP3. (Installation may take longer to install other dependencies.) (For Linux users: install youtube-dl ffmpeg)
Open a terminal in the folder where you want to download the MP3 files.
Replace the script {your-youtube-playlist-id} parameter with your YouTube playlist id.
Run the script.
I have tried everything above, but none could solve my problem. I fixed it by updating the old version of youtube-dl to download playlist.
To update it
sudo youtube-dl -U
or
youtube-dl -U
after you have successfully updated using the above command
youtube-dl -cit https://www.youtube.com/playlist?list=PLttJ4RON7sleuL8wDpxbKHbSJ7BH4vvCk
Some commands which you may find useful while downloading a playlist
Download a playlist
youtube-dl <playlist link>
Best quality video and best quality audio (merged ) + preferred resolution
youtube-dl -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]' <playlist link>
This command will download videos in 1080p resolution if 1080p is available otherwise it will download the next best (less than 1080p) resolution. Here, You can use 480 or 720, etc instead of 1080.
Note: Make sure that ‘FFmpeg’ is installed, otherwise video and audio will not be merged.
Best quality video and best quality audio (merged ) + preferred resolution + Add video upload date on the file name
youtube-dl -o "[%(upload_date)s] %(title)s.%(ext)s" -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]' <playlist link>
Best quality video and best quality audio (merged ) + Preferred resolution + Add video upload date on the file name + Add uploader name on the file name
youtube-dl -o "[%(upload_date)s] %(title)s [%(uploader)s].%(ext)s" -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]' <playlist link>
Subtitle
Best quality video and best quality audio (merged ) + Preferred resolution + Download auto-generated Subtitle
youtube-dl --write-auto-sub -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]' <playlist link>
Best quality video and best quality audio (merged ) + Preferred resolution + Download video creator’s uploaded subtitle
youtube-dl --write-sub -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]' <playlist link>
Best quality video and best quality audio merged + Preferred resolution + Download video Creator’s uploaded specific language’s subtitle
youtube-dl --write-sub --sub-lang en -f 'bestvideo[height<=1080]+bestaudio/best[height<=1080]' <playlist link>
Your link is not a playlist.
A proper playlist URL looks like this:
https://www.youtube.com/playlist?list=PLHSdFJ8BDqEyvUUzm6R0HxawSWniP2c9K
Your URL is just the first video OF a certain playlist. It contains https://www.youtube.com/watch? instead of https://www.youtube.com/playlist?.
Pick the playlist by clicking on the title of the playlist on the right side in the list of videos and use this URL.
Removing the v=...& part from the url, and only keep the list=... part. The main problem being the special character &, interpreted by the shell.
You can also quote your 'url' in your command.
More information here (for instance) :
https://askubuntu.com/questions/564567/how-to-download-playlist-from-youtube-dl
The easiest thing to do is to create a file.txt file and pass the link url link so:
https://www.youtube.com/watch?v=5Lj1BF0Kn8c&list=PL9YFoJnn53xyf9GNZrtiraspAIKc80s1i
make sure to include the -a parameter in terminal:
youtube-dl -a file.txt
Basically, workaround for this problem could be simple replacing & symbol with it's encoded version %26
For those who are struggling with this problem while doing it through PHP (e.g. shell_exec()) , solution could be
str_replace("&", "%26", $shell_command);
I have a Rails app and I get as params in a controller two files. One is audio (WAV) and the other is video (webm).
I need to mix them together so that the output is a video (mp4) with the already mixed audio.
How can I do this?
As #Meier pointed, using Ruby is not the way to go, but using an external program.
Once ffmpeg is installed on host you can run following command inside Rails to have a mkv output video file:
`ffmpeg -i #{video_file.path} -i #{audio_file.path} -acodec copy -vcodec copy -f matroska output.mkv`
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