Streamlink + ffmpeg error: Pipe copy aborted

[Beta2k]

I want to download an encrypted video with streamlink with the following command.

streamlink  --hls-live-restart -o test.mp4 "https://aivottjab-a.akamaihd.net/IAD/jab-assets/jab-prod-iad/out/v1/732334e942a4465b8af9b21077d4e61d/cenc-083bb0.mpd?encoding=segmentBase&amznDtid=AOAGZA014O5RE" best

shortly before the download finishes (at around 26GB), I get the following error:

[19:48:27,437][stream.dash][debug] Download of segment: https://aivottjab-a.akamaihd.net/IAD/jab-assets/jab-prod-iad/out/v1/732334e942a4465b8af9b21077d4e61d/cenc_video_117_0_5791117.mp4 complete
[download][test.mp4] Written 25.97 GB (2h24m58s @ 1.0 MB/s)                                                         
[19:49:27,503][stream.ffmpegmux][error] Pipe copy aborted: \\.\pipe\ffmpeg-12796-364
[19:49:27,518][stream.ffmpegmux][error] Pipe copy aborted: \\.\pipe\ffmpeg-12796-967

Anyone knows what this means? I tried to dig around, but coulnd't come up with anything.

I am on Windows 10, Streamlink 1.7.0 and FFmpeg 4.3.1.

Thanks!

[LZAA]

Content encrypted.

[Beta2k]

I know. I only want to download the encrypted video. No harm.

[LZAA]

Remove ffmpeg.exe from the Streamlink directory.

[Beta2k]

Then I get

C:\Users\pw>streamlink  --hls-live-restart -o test.mp4 "https://aivottjab-a.akamaihd.net/IAD/jab-assets/jab-prod-iad/out/v1/732334e942a4465b8af9b21077d4e61d/cenc-083bb0.mpd?encoding=segmentBase&amznDtid=AOAGZA014O5RE" 720p
[cli][info] Found matching plugin dash for URL https://aivottjab-a.akamaihd.net/IAD/jab-assets/jab-prod-iad/out/v1/732334e942a4465b8af9b21077d4e61d/cenc-083bb0.mpd?encoding=segmentBase&amznDtid=AOAGZA014O5RE
[cli][info] Available streams: 288p (worst), 396p, 540p, 720p, 1080p (best)
[cli][info] Opening stream: 720p (dash)
[cli][error] Try 1/1: Could not open stream <Stream()> (Could not open stream: cannot use FFMPEG)
error: Could not open stream <Stream()>, tried 1 times, exiting

Is this what you expected?

[LZAA]

So it doesn't work without FFmpeg. I cannot suggest anything else.

[Beta2k]

Thanks though. Since the error comes from an `OSError` (I checked the source code), it may work on another operating system. I will try later and report back.

[blimey]

--hls-live-restart!

Why are you using the above command line parameter?

The url is to dash sources, not hls.

Streamlink is coded to skip encrypted sources. Even if those checks are patched out, streamlink will not properly save the drm headers.

Youtube-dl is also coded to skip encrypted sources, but when those checks in youtube-dl are patched out, such modified version of youtube-dl will properly save the drm headers.

[Beta2k]

--hls-live-restart!

Why are you using the above command line parameter?

The url is to dash sources, not hls.

Streamlink is coded to skip encrypted sources. Even if those checks are patched out, streamlink will not properly save the drm headers.

Youtube-dl is also coded to skip encrypted sources, but when those checks in youtube-dl are patched out, such modified version of youtube-dl will properly save the drm headers.

thanks that makes sense.

weirdly, streamlink did not say that it won't download because the source encrypted. maybe has something to do with --hls-live-restart?

[LZAA]

This playlist 'Streamlink' downloads.

[blimey]

deleted per codehound

[codehound]

Regardless of any output filename extension specified to streamlink, streamlink will write the downloaded contents to a matroska container format.

Incorrect.

[blimey]

Incorrect.

Your argument is quite convincing, but can you provide a concrete counterexample for the url provided by the OP:

https://aivottjab-a.akamaihd.net/IAD/jab-assets/jab-prod-iad/out/v1/732334e942a4465b8af9b21077d4e61d/cenc-083bb0.mpd

Provide any streamlink command line example that will produce an output file (using the above url as input) that is not written in the matroska container format (when viewed with a hex editor or other method of directly viewing the raw hex/binary contents of the output file).

[codehound]

Incorrect.

Your argument is quite convincing, but can you provide a concrete counterexample for the url provided by the OP:

https://aivottjab-a.akamaihd.net/IAD/jab-assets/jab-prod-iad/out/v1/732334e942a4465b8af9b21077d4e61d/cenc-083bb0.mpd

Provide any streamlink command line example that will produce an output file (using the above url as input) that is not written in the matroska container format (when viewed with a hex editor or other method of directly viewing the raw hex/binary contents of the output file).

I just saw your sweeping statement further down the post, and felt the need to correct it. As any streamlink newbies could take that at face value....

[LZAA]

All right - 'matroska' container.

[blimey]

I just saw your sweeping statement further down the post, and felt the need to correct it. As any streamlink newbies could take that at face value....

I have deleted the post, giving you full credit, of course.

If you were worried that someone would read the post out of context, you could have provided that context yourself.

Incorrect.

Your reply above, even though just a single word, is rather sweeping as well.

If anyone else wants to verify that dash input sources are written to the matroska container format (when saved to a file), just look at the streamlink source code.

[codehound]

Fairplay, blimey...

I don't wish to get into a clash with you either.

I mainly use streamlink and yt-dl on ubuntu and I have seen this pipe error | on Windows before but never on ubuntu. Maybe a clue for OP (?)

Plus I dont think many streamlink newbies will be delving too far into the source code.

And I cant understand the logic of wanting to DL a cenc encrypted video as-is either...unless I'm missing something.

And the hls-live-restart used to be brilliant on Live youtube sports streams till they moved to dash. Sometimes jumping back hours.