Re: Audio and video gradually go out of sync
On 20 Apr 2016 at 8:00, Nick Payne Nick Payne wrote: > I've been downloading the daily highlight packages from the BBC coverage > of the World Snooker Championships > (http://www.bbc.co.uk/iplayer/episodes/b00b436n). The first two episodes > play without any problem, but the audio and video on the Day 3 program > gradually get out of sync as the program progresses - they're in sync at > the start, but by the end of the 50 minutes of the program, the audio is > about half a dozen seconds in advance of the video. Has anyone else > downloaded the day 3 highlights - if so, did the video and audio stay in > sync? At the moment I don't know whether this is a problem with the GiP > processing at my end or with the download from the BBC. Using GiP 2.94 > on Windows. > > Nick Nick, Vangelis forthnet has given detailed answer. My answer is: live with it - VLC has hasten/delay audio & subs. Peter ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Audio and video gradually go out of sync
On Tue Apr 19 23:00:46 BST 2016, Nick Payne wrote: but the audio and video on the Day 3 program gradually get out of sync as the program progresses - they're in sync at the start, but by the end of the 50 minutes of the program, the audio is about half a dozen seconds in advance of the video. (snip) At the moment, I don't know whether this is a problem with the GiP processing at my end or with the download from the BBC. Using GiP 2.94 on Windows. Hi Nick, am afraid more info is needed... On what tvmode downloaded have you experienced the gradual loss of AV sync? Was it a flash mode (flashhd, flashvhigh etc.) or a hls one (hlshd, hlsvhigh etc.)? For flash modes, the actual downloading is done by rtmpdump; maybe it timed out and resumed (possibly more than once), resulting in an FLV file with corrupt timestamps; while at the remuxing stage that follows ffmpeg tries its best, it may have been unable to completely fix the wrong timestamps, resulting in an MP4 file with issues such as the one you describe. If it was a hls tvmode you recorded, then again at the downloading process ffmpeg might've timed-out on some fragments (harder to spot those errors while ffmpeg continuously writes output in the command prompt window), this again would have resulted in a .ts file with corrupt timestamps not fully fixed in the remuxing process to the final MP4 file... Both flash and hls tvmodes require a robust connection during download for best results... FWIW, I did some tests: 1. On the iPlayer site itself, http://www.bbc.co.uk/iplayer/episode/b078dl2z/snooker-world-championship-highlights-2016-day-3 the programme plays fine all through its end. Of course, in Firefox with Adobe Flash the AdobeHDS streams are being delivered (from right-clicking on Flash): b078dl1m / programme / b078dl2z 1700kbps | HDS (mf_akamai_uk_hds) | b078dl1m | 960x540 those are not supported in GiP, but it's a good indication regardless, as all encodes come from same original source (exceptions may apply, but it's rare...). I moved the slider to 46:32/48:25, and audio was still in sync with video. 2. Flashvhigh tvmode was downloaded (via rtmpdump). No interruption was observed during download, end MP4 file was played back using MPC-BE; again, AV sync was maintained right from the start all through to the duration's end. So it must be something at your end... Delete problematic file and redownload manually, at a time of day when your internet speed is the best - verify in the CLI that rtmpdump does not stop; if the default CDN is causing you grief, try the alternate one (sadly, there's only one CDN now for flashhd, but two still exist for the other flashtvmodes...). You can also try hls tvmodes, e.g. --tvmode=hlshd. (or hlsvhigh) to get rtmpdump out of the equasion. It's a long shot, but perhaps you could also update your FFmpeg binary - GiP 2.94 came with FFmpeg 2.2.3, we're now up to version 3.0.1; maybe significant improvements were introduced in both AppleHLS downloading and MP4 container remuxing... Kind regards, Vangelis. ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Audio and video gradually go out of sync
I've been downloading the daily highlight packages from the BBC coverage of the World Snooker Championships (http://www.bbc.co.uk/iplayer/episodes/b00b436n). The first two episodes play without any problem, but the audio and video on the Day 3 program gradually get out of sync as the program progresses - they're in sync at the start, but by the end of the 50 minutes of the program, the audio is about half a dozen seconds in advance of the video. Has anyone else downloaded the day 3 highlights - if so, did the video and audio stay in sync? At the moment I don't know whether this is a problem with the GiP processing at my end or with the download from the BBC. Using GiP 2.94 on Windows. Nick ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: How to download 96kbps HE-AAC radio 3 stream?
On Tue Apr 19 16:35:18 BST 2016, ChenZhe wrote: I am out of UK, so normally I could only download in 'hlsaaclow' and 'flashaaclow' mode which are of 48kbps HE-AAC quality @ 48kHz. Hello ChenZhe, welcome to the list :-) ... Yes, that is true, for non-UK IPs flash (over RTMP) and hls (i.e. AppleHLS, over HTTP) radiomodes will get you the "*aaclow" quality variants (only for those streams that impose geo-filtering), which are HE-AACv1 @ 48kbpsABR; v1 stands for SBR (read more at: https://en.wikipedia.org/wiki/High-Efficiency_Advanced_Audio_Coding https://en.wikipedia.org/wiki/Spectral_band_replication ), if your software/hardware audio player is SBR compatible, then it can play back the full SR of 48kHz, else it'll fall back to just half the value @24kHz. Since October 2015, most AOD on BBCiPlayerRadio received the "Audio Factory" treament (BBC World Service was the last to get it), so the default BR on desktop browsers was uplifted to AAC LC @320kbpsABR[48kHz] in the UK and HE-AACv1 @ 96kbpsABR[48kHz] elsewhere. (NB: I can't see how you found out the SR to be 44.1kHz, I am also overseas and all AOD (even the 48kbps encodes) are at a SR of 48kHz; 44.1kHz (downsampled) may have been the case in the past, but well over a year ago it was restored by Audio Factory to original value of 48kHz; currently, only MP3 podcasts and Shoutcast live MP3 streams are downsampled to 44.1kHz, for compatibility with legacy devices...) World Service does not geo-locate, 96kbps is the maximum BR you get globally. But sadly, the method of delivery has also changed: For desktop browsers with the Adobe Flash Player Plugin (ActiveX, NPAPI, PPAPI) it is now AdobeHDS https://en.wikipedia.org/wiki/Adaptive_bitrate_streaming#Adobe_HTTP_Dynamic_Streaming while if you have 1) a compatible OS 2) a compatible browser 3) opted-in to HTML5 BBC iPlayer beta http://www.bbc.co.uk/html5 then you get those audio streams via MPEG-DASH https://en.wikipedia.org/wiki/Dynamic_Adaptive_Streaming_over_HTTP The current stable (2.94) release of GiP does not support either AdobeHDS nor MPEG-DASH :-( There exist other tools that can download unencrypted AdobeHDS streams (the beeb do not use DRM - yet?), have a look at https://github.com/K-S-V/Scripts/wiki then google for the rest, I can't be more verbose on this subject as being off-topic... HOWEVER, the develop branch of GiP (2.95dev) https://github.com/get-iplayer/get_iplayer/tree/develop did introduce support for MPEG-DASH streams (both video and audio in the beginning, currently only for audio, due to inherent problems with video streams). MPEG-DASH support is realised via a native pure perl downloader, as FFmpeg does not still have an MPEG-DASH demuxer... You fail to provide any info on your OS used, GiP-2.95dev is undocumented and unsupported by its developer. Have a read at https://github.com/get-iplayer/get_iplayer/wiki/gipdev If on Windows, I have posted in the past about trialing the dev version, it's in the list archives, most recent post at: http://lists.infradead.org/pipermail/get_iplayer/2016-April/008848.html MPEG-DASH streaming method is reflected in the "dash" modes - in latest 2.95dev snapshot, tv and radio modes have been consolidated, dash for AOD is the default (radio)mode, --type=radio, though recommended, is now not strictly needed, so with latest 2.95dev you'd type: perl get_iplayer-295dev.pl --pid=b0770h0q == C:\Program Files\get_iplayer>perl get_iplayer-295dev.pl --pid=b0770h0q (harmless WARNINGS snipped) get_iplayer 2.95-dev, Copyright (C) 2008-2010 Phil Lewis This program comes with ABSOLUTELY NO WARRANTY; for details use --warranty. This is free software, and you are welcome to redistribute it under certain conditions; use --conditions for details. INFO: Episode-only pid detected INFO: Trying pid: b0770h0q using type: tv INFO: Trying to stream pid using type tv INFO: pid not found in tv cache Matches: INFO: 1 Matching Programmes INFO: Checking existence of original version INFO: dashmed1,dashmed2,dashlow1,dashlow2 modes will be tried for version origin al INFO: Trying dashmed1 mode to record radio: Sunday Feature - Menuhin at 100 INFO: File name prefix = Sunday_Feature_-_Menuhin_at_100_b0770h0q_original INFO: Begin recording file: D:\Vangelis\iPlayer Recordings\Sunday_Feature_-_Menu hin_at_100_b0770h0q_original.partial.m4a.m4a INFO: Recorded: 29.99MB in 00:02:23 at 1718kbps to D:\Vangelis\iPlayer Recordin gs\Sunday_Feature_-_Menuhin_at_100_b0770h0q_original.partial.m4a.m4a INFO: Begin converting file: D:\Vangelis\iPlayer Recordings\Sunday_Feature_-_Men uhin_at_100_b0770h0q_original.partial.m4a.m4a size= 30669kB time=00:43:16.69 bitrate= 96.8kbits/s speed=1.37e+003x INFO: Converted file: D:\Vangelis\iPlayer Recordings\Sunday_Feature_-_Menuhin_at _100_b0770h0q_original.partial.m4a INFO: Recorded file: D:\Vangelis\iPlayer Recordings\Sunday_Feature_-_Menuhin_at_ 100_b0770h0q_original.m4a INFO: MP4 tagging M4A
Re: How to download 96kbps HE-AAC radio 3 stream?
In article <557357efeb...@audiomisc.co.uk>, Jim web wrote: > *However* the Flash system Adobe provided for Linux wasn't upgraded. So > can only handle 44k. Hence if you get 44k from the Linux plugin (or use > of older ones elsewhere) it is downconverting. To expand and clarify a little: If you've been using the (old!) Adobe Flash plugin for Linux (e.g. with FireFox or another browser) it will be getting 48k sample rate from the BBC, then downconverting it to 44k. This means a needless downcoversion takes place. To confuse everyone: A) The old Flash player tells fibs. Some of the values it displays are hard wired into the code. B) On many Linux distros, by default, the system will be running an audio 'mixer'. (Pulse Audio is a common culprit here.) This tends to convert everything sent for playout to 48k. A and B above confused people at the BBC about this until I got them to check. They'd believed what Adobe told them, not realising that Adobe had abandoned Flash for linux without dealing with its old 44k limit. (Windows and Mac users were OK as the newer versions should handle 48k sample rate as they have newer versions from Adobe.) So you may well be able to get low data rate streams. But they'll be 48k sample rate. *Avoid* the old Flash plugin for Linux if you can... and of course given gip, you can. :-) Jim -- Electronics http://www.st-and.ac.uk/~www_pa/Scots_Guide/intro/electron.htm Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html Audio Misc http://www.audiomisc.co.uk/index.html ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: How to download 96kbps HE-AAC radio 3 stream?
On Tue, Apr 19, 2016 at 4:35 PM, ChenZhe wrote: > > I am out of UK, so normally I could only download in 'hlsaaclow' and > 'flashaaclow' mode which are of 48kbps HE-AAC quality @ 48kHz. > However, the aac stream embedded in flash player is of better quality which > is 96kbps HE-AAC @ 44kHz. An example link is: > http://www.bbc.co.uk/programmes/b0770h0q > What is the correspondent mode to download the 44kHz 96kbps stream ? Hi, Have you tried: get_iplayer --info --pid b0770h0q This, for me, lists all the modes available which might include higher-bandwidth streams. For example, flashhigh is 320kbit/s LC-AAC, while hlsstd is 128kbit/s LC-AAC. J ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: How to download 96kbps HE-AAC radio 3 stream?
In article , ChenZhe wrote: > Hi Everyone, > I am out of UK, so normally I could only download in 'hlsaaclow' and > 'flashaaclow' mode which are of 48kbps HE-AAC quality @ 48kHz. > However, the aac stream embedded in flash player is of better quality > which is 96kbps HE-AAC @ 44kHz. An example link is: > http://www.bbc.co.uk/programmes/b0770h0q > What is the correspondent mode to download the 44kHz 96kbps stream ? My understanding is that the BBC ceased sending the 44k streams for Flash. This was because they'd been told (incorrectly!) by Adobe that all the plugins could now accept 48k. The older flash plugins couldn't. *However* the Flash system Adobe provided for Linux wasn't upgraded. So can only handle 44k. Hence if you get 44k from the Linux plugin (or use of older ones elsewhere) it is downconverting. At least this is what was established when I asked people at the BBC to check some months ago. Previous to 'Audio Factory' they'd been deliberately generating a 44k version to cope with the old plugins. Given what they were told, they took that out of the system. Jim -- Electronics http://www.st-and.ac.uk/~www_pa/Scots_Guide/intro/electron.htm Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html Audio Misc http://www.audiomisc.co.uk/index.html ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
How to download 96kbps HE-AAC radio 3 stream?
Hi Everyone, I am out of UK, so normally I could only download in 'hlsaaclow' and 'flashaaclow' mode which are of 48kbps HE-AAC quality @ 48kHz. However, the aac stream embedded in flash player is of better quality which is 96kbps HE-AAC @ 44kHz. An example link is: http://www.bbc.co.uk/programmes/b0770h0q What is the correspondent mode to download the 44kHz 96kbps stream ? Best, Zhe ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Receiving a "You have been unsubscribed" email when not actually unsubscribing
On 19 April 2016 at 12:13, Stuart Henderson wrote: > Another likely reason: gmail hates mail delivered over v6. More likely to be that the domain is broken and outgoing email isn't setup to meet current standards... http://mxtoolbox.com/domain/lists.infradead.org/ https://toolbox.googleapps.com/apps/checkmx/check?domain=lists.infradead.org No DKIM? No SPF? No DMARC? Primary Name Server Not Listed At Parent? Remote domain could not be found? I'm amazed ANY mail gets in or out at all! ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Receiving a "You have been unsubscribed" email when not actually unsubscribing
On 2016/04/19 11:15, Peter Corlett wrote: > The likely reason Google is bouncing some list mail is that a few spams have > been forwarded to list subscribers, and that's given the list itself a lower > score. Another likely reason: gmail hates mail delivered over v6. ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Receiving a "You have been unsubscribed" email when not actually unsubscribing
- Original Message - From: Peter Corlett Cc: get_iplayer@lists.infradead.org Sent: Tuesday, April 19, 2016 10:15 AM Subject: Re: Receiving a "You have been unsubscribed" email when not actually unsubscribing ... The likely reason Google is bouncing some list mail is that a few spams have been forwarded to list subscribers, and that's given the list itself a lower score. I got one last week which used the UTF-8 character set and Base64 encoding to send spam in Chinese characters. From the headers it looked as though it had been forwarded by the list server. It seems the list server will reject messages which misuse In-Reply-To (and as I don't use a threaded email client I didn't even realise that was a problem) but does not check the message is in Latin characters. ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Receiving a "You have been unsubscribed" email when not actually unsubscribing
On Tue, Apr 19, 2016 at 07:44:00AM +0100, SB wrote: [...] > Same, yesterday I found myself un-subscribed. I've no idea why. Perhaps the > e-mail system has been hacked. Many people claim that their email has been hacked, but it's actually pretty rare. Competent hackers don't leave a trace; see the rather good write-up of how Hacking Team was itself compromised for how it's done. Human error is the usual cause of things going visibly pear-shaped. A "you have been unsubcribed" email from a mailing list usually means that list mail is bouncing, and the email usually explains the reason. You would normally ask your mail admin to look into this, but good luck getting Google to care. The likely reason Google is bouncing some list mail is that a few spams have been forwarded to list subscribers, and that's given the list itself a lower score. ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
Re: Receiving a "You have been unsubscribed" email when not actually unsubscribing
I had the same message yesterday. When I looked at recent discussions on the list, I could see I hadn't received any for at least a week. Like you, I resubscribed. A mystery. At least the emails on this subject have come through! Kelly Subject:RE: Receiving a "You have been unsubscribed" email when not actually unsubscribing Date sent: Tue, 19 Apr 2016 08:44:01 +0100 From: "Andy Wedge" To: [ Double-click this line for list subscription options ] > > Has anyone recently experienced being unsubscribed from the > > get_iplayer list without actually requesting being unsubscribed? I'm glad it wasn't just me :-) I hadn't received any posts on this list since 22nd March. I was thinking it was unusual and then I got unsubscribed. The unsubscribe notice indicated it was from get-iplayer-bounces which suggests that the list was having problems sending emails to my address for some reason. Andy ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
RE: Receiving a "You have been unsubscribed" email when not actually unsubscribing
> > Has anyone recently experienced being unsubscribed from the > > get_iplayer list without actually requesting being unsubscribed? I'm glad it wasn't just me :-) I hadn't received any posts on this list since 22nd March. I was thinking it was unusual and then I got unsubscribed. The unsubscribe notice indicated it was from get-iplayer-bounces which suggests that the list was having problems sending emails to my address for some reason. Andy ___ get_iplayer mailing list get_iplayer@lists.infradead.org http://lists.infradead.org/mailman/listinfo/get_iplayer
