[Question] Does the script overwrite already downloaded video?

[dipen]

Hi,

I might be using the script multiple times on the same course, for instance when a new week of videos are put online. Will the script skip already downloaded sections or will it try to download from the start?

Script worked great to get me proglang videos :) Thanks a ton.

[rbrito]

Hi.

On Wed, Jan 30, 2013 at 9:33 PM, dipen notifications@github.com wrote:

I might be using the script multiple times on the same course, for instance when a new week of videos are put online. Will the script skip already downloaded sections or will it try to download from the start?

No, it won't overwrite the files. I use it myself to only download the
missing videos for a given course.

Regards,

Rogério Brito : rbrito@{ime.usp.br,gmail.com} : GPG key 4096R/BCFCAAAA
http://rb.doesntexist.org/blog : Projects : https://github.com/rbrito/
DebianQA: http://qa.debian.org/developer.php?login=rbrito%40ime.usp.br

[dipen]

Thanks!

[dipen]

As far as I can tell, its downloading the videos (the ones downloaded in first run) again on the second run.

I downloaded the course yesterday and then I was showing a friend this utility, it started downloaded ( heavy download internet traffic ) the videos again. I really like it, but this is kind of a bummer :(

[dipen]

Actually, I think I'll need to look at code to be sure, its skipped many but then downloaded some which I'm sure were there yesterday. Here is the output log

https://gist.github.com/dipen/4714437

[jplehmann]

Are you sure that all of those files were already there? Kind of strange for it to skip some but not all which were already downloaded.

What happens if you let it run to completion (that is, it downloads eveything available), and then run the command again? It should skip everything in this case. This should be easy to verify.

[rbrito]

Hi.

On Tue, Feb 5, 2013 at 11:31 AM, John Lehmann notifications@github.com wrote:

Are you sure that all of those files were already there? Kind of strange for it to skip some but not all which were already downloaded.

Something that I have seen happen is that:

• Coursera uploads some (but not all) material for a given week to
  Amazon. Then, they update the things remaining (e.g., missing PDFs
  etc).
• Some files are uploaded to Amazon, but, for some reason, Amazon
  gives us a 403 (forbidden) or 500 (server error) when serving them.
  Then, in a second run (after a few hours), the files become available
  again.

I see this when downloading with aria2c (which usually has very
verbose output and, now, it has colors :) ) and I have, therefore,
learnt to not worry in such cases, as the problem is not with
coursera-dl, but out of our hands.

To the original poster: can you verify that you're not hitting one of
the cases that I mentioned above?

It would help a lot if you could use an external downloader (say,
wget) and stare at its output when downloading stuff.

Regards,

Rogério Brito : rbrito@{ime.usp.br,gmail.com} : GPG key 4096R/BCFCAAAA
http://rb.doesntexist.org/blog : Projects : https://github.com/rbrito/
DebianQA: http://qa.debian.org/developer.php?login=rbrito%40ime.usp.br