HLS/DASH downloads resumable across sessions

Simon Morgan s.morgan at skm.org.uk
Mon Mar 6 08:43:31 PST 2017

With a 1TB hdd costing about £50, a simple solution would be to upgrade. I
wish my problem was as simple as upgrading HDD but with a download speed of
less than 3MB/s, I weep when people report download speeds of 20-100+ MB/s.

> -----Original Message-----
> From: get_iplayer [mailto:get_iplayer-bounces at lists.infradead.org] On
> Behalf Of Richard Cole
> Sent: 06 March 2017 14:36
> To: get_iplayer at lists.infradead.org
> Subject: HLS/DASH downloads resumable across sessions
> This was a feature introduced in v2.98.  The most common problem I
> have, rather than needing to resume the download, is not having enough
> free disk space for twice the file size.  In addition to the downloaded
> file a temporary file is created during the multiplexing by ffmpeg, and
> if there is not enough disk space the multiplexing fails.  The
> downloaded file is preserved, so it is possible to run ffmpeg manually.
> However it has taken me a long time get to the stage of knowing the
> parameters to pass to ffmpeg, and I still don't know the parameters for
> AtomicParsley.  What I was going to ask was for what I thought would be
> new feature, for commands to be made available to run ffmpeg and
> AtomicParsley manually after a failure.
> I have now discovered the new feature already does what I was going to
> ask for.  If the failed command is repeated, there is a prompt saying
> the download is already in the history, and to use --force.  If the
> command is repeated with --force there is then a message telling you to
> use --overwrite to re-download.  Otherwise it just resumes from
> wherever it got to on the previous attempt, including just running
> ffmpeg and AtomicParsley if necessary.
> I thought it was worth mentioning in case anyone else had not spotted
> this aspect of the new feature.
> I have also noticed in v2.99 that DAF radio downloads run at about 10
> times the speed (40Mbit/s) of HAF downloads.
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