I want to create a playlist in RealPlayer through a Perl script to avoid every time opening the ReaPlayer for an audio or video file.
You could use the Smil module from CPAN.
RealPlayer supports SMIL.
You just have to construct the right text in the file. Lucas Gonze put together a nice survey of playlist formats, including the ones you need for RealPlayer.
Related
I've recently made a Python program using the Youtube api v3 where, given a playlist id, it fetches certain information from every video in the playlist. However, through both the output of this code and this post on Google, it's pretty clear that information on videos that were either privated or deleted is not available through the Youtube api.
Is there an alternative program or resource that I can use to extract information from these unavailable videos, in particular their video ids?
The only solution I can think of now is to access the HTML of the display Youtube and search through it for certain strings (like "[deleted video]") and to then extract the id corresponding to that string. But, I've never dealt with HTML and, if I understand HTML correctly, I'd have to load a new page for every 50 videos in the playlist, which for playlists with thousands of videos, becomes rather inefficient and laborious.
I was hoping to use something like PyTube, but that couldn't handle unavailable videos either.
Edit
Here is the code that extracts the video ids:
from googleapiclient.discovery import build
api_key = "AI~~~" #get from yt (private key)
yt = build("youtube", "v3", developerKey = api_key)
plst_id = "PLorw3mfu-J0ipF4Ss0XgR8IxcwP-JzNKC" #unique yt playlist id
plst_req = yt.playlistItems().list( #request for info from yt api
part = "contentDetails",
playlistId = plst_id,
maxResults = 50
)
plst = plst_req.execute()
vid_ids = [] #available video ids taken from current playlist
for vid in plst['items']:
vid_ids.append(vid['contentDetails']['videoId'])
print(vid_ids)
print(plst['pageInfo']['totalResults'])
The first line printed contains the video ids of every available video in the playlist. The second line printed gives the number of videos in the playlist, including available and unavailable ones.
The playlist used in the code above is given here. It contains 10 total videos, of which one of them is unavailable.
In this case, the output is (with a valid api key)
['bv_cEeDlop0', 'mRKTOZmX2cE', '5ACvKdx1nns', 'wSNhP8b_Avo', 's56cHgokPlE', 'E4IHMWnQiMw', 'sCDkPShADSc', 'EVwgeUVVDYU', 'Z8Mqw0b9ADs']
10
Youtube still treats unavailable videos as an element of the playlist, but does not give out it's video id. In this particular instance, the video id of the unavailable video is "t83zUmjr05I", which is not hard to find manually: copy the link address of the deleted video and extract the part after the "v=".
But, on a larger scale manual extraction becomes tedious.
Here's a permanent fix to that!
You can try tube_dl.
pip install tube_dl
It uses modular approach and is up to date
More about this can be found at : https://github.com/shekharchander/tube_dl/
Maybe, the playlist module can help you with that. It uses regex to grab all video IDs not JSON. Please let me know if the problem is fixed or not, I will update module accordingly.
Edit
Here's the working code
from tube_dl import Playlist
p = Playlist('https://youtube.com/playlist?list=PLorw3mfu-J0ipF4Ss0XgR8IxcwP-JzNKC').videos
print(p)
I am trying to retrieve RIFF data from AVI file in my iOS app. I tried to convert AVI file to NSDATA and then i have converted to NSASCIIStringEncoding and i am getting all tag as string but how to retrieve particular tag,in this case I am getting all data but as there is lots data inside it, it is tough to get data from specific tags. I want to retrieve specific data from the specific tag. Here I have enclosed screenshot which shows how data looks like on Windows computer. I have used software named AVI master to see RIFF data in windows computer .As you can see in the screenshot, I will need data associated with 03tx tag.
I tried all possible ways to read chunk by chunk and also tried Libavformat library, but no success. Is there any other way to get RIFF data associated with AVI file?
Please advise.
Is there a way to get the Name of current playing program, from a DVB recording in .TS format?
In VLC I can see it in Tile Bar, and also in "Now Playing", but in MediaInfo it shows many hours and programs, and not only what is being played.
Is it possible to get that Title from VLC CLI, and pass it to a var from a BATCH file?
I use Mediainfo CLI to pass others parameters, but if I look for it in the "Menu" section:
%mediainfo% "%~1" "--Inform=Menu; %%Title%%"
nothing shows, and I can't find the right parameter to get the Title of the TV Show (although maybe it will show all the hours and programs and not the current).
So, I'd like to know if I can do it with VLC CLI, MediaInfo CLI, or another CLI software.
Thanks!
If you have recorded a TV stream there must be DVB tables in it.
The information you want is hidden in these tables:
SDT: Service Description Table (~ channel description: scrambled/clear, status, ...)
EIT: Event Information Table (~ program description: name, length, ...)
Both of these tables are used to build an EPG.
Unfortunately I don't know a direct way to achieve what you want but you might want to try libdvbpsi, ffmpeg or dvbsnoop : this tools can analyse, and extract information from TS files.
I'm using AVCaptureSession to record a video with audio. Everything seems to work properly for short videos, but for some reason, if I record a video that is longer than about 12 seconds, the audio doesn't work.
Edit (because this answer is still getting upvotes): This answer works to mitigate the problem but the likely root cause for the issue is addressed in #jfeldman's answer.
I found the solution as an answer to a completely different question.
The issue is the movieFragmentInterval property in AVCaptureMovieFileOutput.
The documentation for this property explains what these fragments are:
A QuickTime movie is comprised of media samples and a sample table
identifying their location in the file. A movie file without a sample
table is unreadable.
In a processed file, the sample table typically appears at the
beginning of the file. It may also appear at the end of the file, in
which case the header contains a pointer to the sample table at the
end. When a new movie file is being recorded, it is not possible to
write the sample table since the size of the file is not yet known.
Instead, the table is must be written when recording is complete. If
no other action is taken, this means that if the recording does not
complete successfully (for example, in the event of a crash), the file
data is unusable (because there is no sample table). By periodically
inserting “movie fragments” into the movie file, the sample table can
be built up incrementally. This means that if the file is not written
completely, the movie file is still usable (up to the point where the
last fragment was written).
It also says:
The default is 10 seconds. Set to kCMTimeInvalid to disable movie
fragment writing (not typically recommended).
So for some reason my recording is getting messed up whenever a fragment is written. I just added the line movieFileOutput.movieFragmentInterval = kCMTimeInvalid; (where movieFileOutput is the AVCaptureMovieFileOutput I've added to the AVCaptureSession) to disable fragment writing, and the audio now works.
We also experienced this issue. Basically disabling movie fragment writing will work but it doesn't actually explain the issue. Most likely you are recording to an output file using a file extension that does not support this feature, like mp4. If you pass an output file with the extension mov you should have no issues using movie fragment writing and the output file will have audio.
Updating videoFileOutput.movieFragmentInterval = kCMTimeInvalid solved this for me.
However, I accidentally set the movieFragmentInterval after calling startRecordingToOutputFileURL. An agonizing hour later I realized my mistake. For newbies like me, note this obvious sequence.
videoFileOutput.movieFragmentInterval = kCMTimeInvalid
videoFileOutput.startRecordingToOutputFileURL(filePath, recordingDelegate: recordingDelegate)
kCMTimeInvalid is now deprecated. This is how to assign it now:
videoFileOutput?.movieFragmentInterval = CMTime.invalid
I'm trying to figure out how I can specify a custom end time for an embedded YouTube video. I know that I can customize the start time by adding &start=30, but I haven't seen anything relating to the end time.
I need to be able to do this for a web app I'm building, so if there is no way provided by YouTube, how might I be able to accomplish this anyway?
I've skimmed over the documentation to no avail. Thanks!
I just found out that the following works:
https://www.youtube.com/embed/[video_id]?start=[start_at_second]&end=[end_at_second]
Note: the time must be an integer number of seconds (e.g. 119, not 1m59s).
I tried the method of #mystic11 ( https://stackoverflow.com/a/11422551/506073 ) and got redirected around. Here is a working example URL:
http://youtube.googleapis.com/v/WA8sLsM3McU?start=15&end=20&version=3
If the version=3 parameter is omitted, the video starts at the correct place but runs all the way to the end. From the documentation for the end parameter I am guessing version=3 asks for the AS3 player to be used. See:
end (supported players: AS3, HTML5)
Additional Experiments
Autoplay
Autoplay of the clipped video portion works:
http://youtube.googleapis.com/v/WA8sLsM3McU?start=15&end=20&version=3&autoplay=1
Looping
Adding looping as per the documentation unfortunately starts the second and subsequent iterations at the beginning of the video:
http://youtube.googleapis.com/v/WA8sLsM3McU?start=15&end=20&version=3&loop=1&playlist=WA8sLsM3McU
To do this properly, you probably need to set enablejsapi=1 and use the javascript API.
FYI, the above video looped: http://www.infinitelooper.com/?v=WA8sLsM3McU&p=n#/15;19
Remove Branding and Related Videos
To get rid of the Youtube logo and the list of videos to click on to at the end of playing the video you want to watch, add these (&modestBranding=1&rel=0) parameters:
http://youtube.googleapis.com/v/WA8sLsM3McU?start=15&end=20&version=3&autoplay=1&modestBranding=1&rel=0
Remove the uploader info with showinfo=0:
http://youtube.googleapis.com/v/WA8sLsM3McU?start=15&end=20&version=3&autoplay=1&modestBranding=1&rel=0&showinfo=0
This eliminates the thin strip with video title, up and down thumbs, and info icon at the top of the video. The final version produced is fairly clean and doesn't have the downside of giving your viewers an exit into unproductive clicking around Youtube at the end of watching the video portion that you wanted them to see.
Use parameters(seconds) i.e. youtube.com/v/VIDEO_ID?start=4&end=117
Live DEMO:
https://puvox.software/software/youtube_trimmer.php
Youtube doesn't provide any option for an end time, but there alternative sites that provide this, like
Tubechop. Otherwise try writing a function that either pauses video/skips to next
when your when your video has played its desired duration.
OR: using the Youtube Javascript player API, you could do something like this:
function onPlayerStateChange(evt) {
if (evt.data == YT.PlayerState.PLAYING && !done) {
setTimeout(stopVideo, 6000);
done = true;
}
}
Youtube API blog
Today I found, that the old ways are not working very well.
So I used:
"Customize YouTube Start and End Time - Acetrot.com"
from http://www.youtubestartend.com/
They provide a link into
https://xxxx.app.goo.gl/yyyyyyyyyy
e.g. https://v637g.app.goo.gl/Cs2SV9NEeoweNGGy9
Link contain forward to format like this
https://www.youtube.com/embed/xyzabc123?start=17&end=21&version=3&autoplay=1
I was just trying to look up how and found there is a CLIP feature now added by Youtube right under the video that I had never noticed before!
I use this signature:
youtube.com/embed/[YOUR_VIDEO_ID]?start=[TIME_IN_SEC]&end=[TIME_IN_SEC]&autoplay=1
https://www.youtube.com/embed/2EWejmkKlxs?start=1230&end=1246&autoplay=1