Video Download Problem - Does not complete - Vienna State Opera

[Matt Vernon]

I'm experiencing downloads that are displayed to achieve 100% only to then give an error message such as:

MP2T - No data receivedError: MP2T - No data received at t.value (chrome-extension://lmjnegcaeklhafolokijcfjliaokphfk/background/main.js:1:224806) at t.value (chrome-extension://lmjnegcaeklhafolokijcfjliaokphfk/background/main.js:1:176188) at t.value (chrome-extension://lmjnegcaeklhafolokijcfjliaokphfk/background/main.js:1:130704) at chrome-extension://lmjnegcaeklhafolokijcfjliaokphfk/background/main.js:1:175337

The site in question is: (though any opera stream will work from this site)

url: https://play.wiener-staatsoper.at/event/73a04ef8-8d4b-4a49-94a6-36eed4a7b311/play

This is the Vienna Opera who is broadcasting free daily during COVID.

You need to register to use but there is no cost.

I use Chrome but also have problem in Firefox.

I am on MAC OS. 

I have used VDH many 100's of times on other sites and this is the only one where I get to the end and it fails to complete.

What I observe is that VDH get to 100% then throws the error that appears in the red circle whose contents were given above. I don't see where the data that was downloaded prior to the error is kept to inspect.

I usually want to save in high resolution (1920x1040 @8Mbps-MP4) but I also tried at the smallest resolution (960x540@561Kbps-MP4) with same error and symptoms so you should be able to use the low resolution stream for testing.

Thanks in advance for for assisting

[jcv...@gmail.com]

Sorry I can't access this video, but I'm afraid it there is no solution on this case.

jerome

[Wild Willy]

There are at least 2 people who have posted here who have mentioned that they regularly get stuff from the Wiener Staatsoper.  Surprising they haven't responded here.

[Matt Vernon]

Thanks for replying

When you say there is no solution in this case, what from the error message causes the problem that makes it not solvable?

The site is free for register - the problem I have occurs for any of their daily free offerings.

Can you look at the one that is available on the day you register?

Thanks Matt

[Geevee]

So in the interest of science i downloaded today's Verratenes  Meer from Vienna using VDH. I normally use ffmpeg because I need it to get the subtitles anyway.

It chugged along for 45 minutes, giving me constant updates on how much it had downloaded, until at 100% it just disappeared with "No media in tab".  The folder I saved to had a miserable part file of 48 KB. The error data was:

MP2T No data received

moz-extension://0480f45b-0437-47b2-8b8a-c3cc495e8c4d/background/main.js:1

value@moz-extension://0480f45b-0437-47b2-8b8a-c3cc495e8c4d/background/main.js:1:223889

value@moz-extension://0480f45b-0437-47b2-8b8a-c3cc495e8c4d/background/main.js:1:175759

value@moz-extension://0480f45b-0437-47b2-8b8a-c3cc495e8c4d/background/main.js:1:132248

value/t.endTimer<@moz-extension://0480f45b-0437-47b2-8b8a-c3cc495e8c4d/background/main.js:1:174908

I use win10, Firefox latest, companion app 1.5

The download works just fine in ffmpeg. here are the ffmpeg commands:

"E:\ffmpeg-4.2.2-win64-static\bin\ffmpeg.exe" -i https://live.performa.intio.tv/streams/43e578d3-5dfe-4ec4-be01-de02eabb55e0/master-allsubs.m3u8  -c copy "Das verratene Meer.mp4"

"E:\ffmpeg-4.2.2-win64-static\bin\ffmpeg.exe" -i https://live.performa.intio.tv/streams/43e578d3-5dfe-4ec4-be01-de02eabb55e0/subs-eng.m3u8  -c copy "Das verratene Meer.vtt"

"E:\ffmpeg-4.2.2-win64-static\bin\ffmpeg.exe" -i https://live.performa.intio.tv/streams/43e578d3-5dfe-4ec4-be01-de02eabb55e0/subs-deu.m3u8  -c copy "Das verratene Meer.deu.vtt"

[Geevee]

PS there are no TS file. Each individual chunk has an extension of mp4.

[Wild Willy]

I would add to Geevee's comment that the base document on using ffmpeg to get operas is here:

https://groups.google.com/g/video-downloadhelper-q-and-a/c/8V2cRB-bcK4/m/a5n8ADS7BwAJ

[Wild Willy]

Oops.  Sorry.  This is the URL:

https://groups.google.com/g/video-downloadhelper-q-and-a/c/8V2cRB-bcK4

It's the beginning part of the URL I posted above.  I don't know why I got that one.  The URL in my previous post puts you in the middle of the thread.  The URL in this post puts you at the beginning of the thread.

[Matt Vernon]

Geevee

I was able to use the ffmpeg commands you gave without issue.

One question - when I access the site I do not see the url you gave, i.e. I do not see the https://live.performa.intio.tv....

What I see is something like this 

 https://play.wiener-staatsoper.at/event/f04d3ab4-e175-4344-92ea-bc14aeb232fc/play

How do I determine the url to pass to ffmpeg from the url I access ?

Thanks

Matt

On Monday, December 21, 2020 at 8:16:16 PM UTC-5 Geevee wrote:

[Geevee]

It's all somewhere in the thread Willy pointed you to. This is what you do in Firefox in Windows. You'll have to make the adjustments for Mac yourself.

1. get at the developer tools sidebar (In Windows, press the F12 key. Dunno what the corresponding Mac action is)

2. Click on the Network tab

3. Enter m3u8 in the filter field

4. start to watch the opera

5. You will see the manifest files in the developer window.

6. Right-click on the master manifest. You will get a menu whose first entry is "Copy"

7. Right-click on "Copy" and select" URL"

8. Paste the result into your ffmpeg line.

9. You get the German subtitle m3u8 file automatically. If you want the subtitles for another language, select it on the video and its m3u8 file will appear in the developer window. The set up and run the ffmpegs as above.

(Again, do whatever the MAc equivalent of right-click is)

[Geevee]

Here's what you should be seeing:

[Matt Vernon]

I read all the threads suggested and was able to download w/o issue. Thanks for making all this information available. I guess the only question that remains is if for the various sites where we know how to extract the correct url to provide to ffmpeg, is VDH trying to make that convenient?  Do we know why it fails here while we can use ffmpeg?

Again thanks to everyone for making it clear and easy to follow.  

[Geevee]

Matt,

" Do we know why it fails here while we can use ffmpeg?"  Probably, VDH doesn't understand the m3u8 manifest that the Staatsoper and Met live streams send. Here's what we know:

Met on demand files: The video and audio chunks are contained in the same manifest, and VDH has no problem

.

Met daily streams and Staatsoper:  VDH makes it extraordinarily difficult (for no good reason) to click on the right video and audio stream. The video and audio chunks are in different manifests. It is in fact possible to download the streams separately with VDH and have VDH combine them. But, and it's a giant but, it requires the hand-eye co-ordination, split-second decision making, and fast trigger finger of an experienced gamer to do it.

Here's why: VDH insists on listing all the irrelevant individual chunks of the video and audio as they are streamed while playing, and it insists on listing the most recently received chunk first. This pushes the master manifests to the bottom of an ever-increasing list. Then, to make it more difficult, it insists on updating the irrelevant list in real time. The result is that picking the right streams turns into an exercise in frustration. And you need to do this twice, because you need to download audio and video separately.

A minor additional irritation makes the selection even more difficult. VDH does not distinguish the video and audio streams from these sites, so you have to guess which is which.

That's why we use ffmpeg on these streams.

Will VDH ever fix this? I doubt it. The developers are going to concentrate on the sites they have advertised as working. And that's reasonable, because only a very few of us are interested in these opera and ballet streams. The developers are going to concentrate on sites that are used by more people.

And that's why we'll keep on using ffmpeg.

[Wild Willy]

I like your gamer metaphor.

I'm a little more optimistic than that.  There's several other sites whose m3u8 files have looked a whole lot like the Met's.  I've posted in those threads & Michel has seen what I've done in a number of those cases.  He's well aware that the Met is just one example among quite a few of the kind of problem you guys are dealing with here.  This issue of separate audio & video streams is reasonably widespread & I think there's a decent chance that Michel will tackle it.

My observation is that when VDH sees one of these situations where there's an m3u8 with multiple streams, each being only audio or only video, that the first entries in the VDH menu are the video without audio streams in descending order of video resolution.  VDH gets this information from the m3u8.  You guys have surely seen it.  Following those in the VDH menu, it looks like there are some duplicates of those streams, but in reality those appear to be the audio without video streams.  The problem is that it's harder to associate the entries in the VDH menu with the audio stream descriptions in the m3u8.  There is also no indication in the VDH menu which audio stream (singular) goes with which video streams (plural).  Quite often you can see in the m3u8 that a given audio stream is the partner of several video streams, that a few video streams share a common audio stream, but VDH is not currently picking up on that.  But I'm not entirely certain that that manifest structure is adhered to on 100% of the web sites where "Met-like" m3u8 files can be found.  It seems to be a common practice on sites that use the Brightcove player, but that's not the only player I've encountered that uses a master m3u8 that resembles the Met's.  From what I've observed, VDH goes to some trouble to present the variants in its menu in an order that does not at all match the sequence in which they are presented in the m3u8.  I should think that if that much work went into giving us the confusing VDH menu we get today, it wouldn't be any harder to give us the information in a way that is helpful instead.

As for the chunks of streams being shown in the VDH menu, yes that happens.  But I thought the new ones were always added at the bottom.  Maybe on the Staatsoper site it doesn't work that way.