/dev/chat

derobert

00:33

@FaheemMitha It seems he's saying he'll join us in chat, but (as @terdon pointed out) he can't manage to log in to chat.

Faheem Mitha

@derobert Ah, Ok. Awake now?

Or going to sleep?

derobert

Yes, awake now. But going AFK for a while shortly.

Faheem Mitha

@derobert ok

derobert

Though I'll have a phone with me, so maybe I'll pop in if something is interesting enough :-/

Faheem Mitha

I'd have thought SE on a mobile would be more trouble than it is worth.

Jordan Dolan

00:39

Hi Faheem

you were kind enough to respond to an earlier post of mine..

Faheem Mitha

@JordanDolan Hi. Refresh my memory, please. I don't remember.

Oh, never mind, I do.

Jordan Dolan

0

Q: MongoDB will not uninstall

So, it would appear that following the official MongoDB installation instructions when installing on Debian - you're heading for a world of pain. Firstly, it didn't install correctly so now - i'm trying to remove all installed MongoDB packages so that I can start from scratch. Frustratingly, bec...

:)

Faheem Mitha

Right

Jordan Dolan

I'll go ahead and try to create an empty /etc/init.d/mongod first?

Faheem Mitha

@JordanDolan Paste the prerm first. In the question

Jordan Dolan

00:43

done

Faheem Mitha

@JordanDolan Ok, adding a blank file won't work. It's going to try to invoke it, I think. Anyone else here agree?

Jordan Dolan

you're right - insserv: script mongod is not an executable regular file, skipped!

Faheem Mitha

Question: is mongo-db actually running?

I don' t even know what it is.

Jordan Dolan

jordan@mia:/$ mongod
mongod --help for help and startup options
2015-03-01T00:45:08.915+0000 [initandlisten] MongoDB starting : pid=3994 port=27 017 dbpath=/data/db 64-bit host=mia
2015-03-01T00:45:08.916+0000 [initandlisten] db version v2.6.8
2015-03-01T00:45:08.916+0000 [initandlisten] git version: 3abc04d6d4f71de00b5737 8e3277def8fd7a6700

it would seem so

Faheem Mitha

@JordanDolan Hmm, actually it looks like it isn't. can you check for the relevant process?

ps aux | grep mongo

should show something relevant.

Jordan Dolan

00:46

Will do

Faheem Mitha

Back in 5.

Jordan Dolan

sure; thanks

jordan@mia:/$ sudo ps aux | grep mongo
jordan 4001 0.0 0.1 7844 1932 pts/0 S+ 00:46 0:00 grep mongo

Faheem Mitha

@JordanDolan Ok, that is most likely no then.

In that case, you can simply comment out the prerm file.

Just the lines:

if [ -e "/etc/init/mongod.conf" ]; then
invoke-rc.d mongod stop || exit $?
fi

should do it.

Then try the removal again. Though I would use apt-get purge mongodb-org-server

Jordan Dolan

Trying now :)

Faheem - you genius ;)

That's working - was it not uninstalling because it was trying to invoke a file that didn't exist?

or something else..

Faheem Mitha

@JordanDolan the package seems to be broken. It should have /etc/init.d/mongod but doesn't.

You can check that.

Jordan Dolan

00:58

you're right, that file doesn't exist

Faheem Mitha

@JordanDolan It presumably should. I'll write an answer. Then you can accept it if you want.

Jordan Dolan

Great ; thanks Faheem

A great help

Faheem Mitha

@JordanDolan I'd report a bug against that package. Incidentally, why didn't you just install the regular Debian package?

root@orwell:/home/faheem# apt-cache policy mongodb-server
mongodb-server:
Installed: (none)
Candidate: 1:2.0.6-1.1
Version table:
1:2.4.10-4 0
50 http://debian.lcs.mit.edu/debian/ testing/main amd64 Packages
50 http://debian.lcs.mit.edu/debian/ unstable/main amd64 Packages
1:2.4.8-2~bpo70+1 0
100 http://debian.lcs.mit.edu/debian/ wheezy-backports/main amd64 Packages
1:2.0.6-1.1 0
500 http://debian.lcs.mit.edu/debian/ wheezy/main amd64 Packages
1:1.4.4-3 0
500 http://debian.lcs.mit.edu/debian/ squeeze/main amd64 Packages

There's also a backport.

Gilles

@slm Why did you close unix.stackexchange.com/questions/187439/… ? It's a different question

if you really want to close as a duplicate, unix.stackexchange.com/questions/158798/… could be appropriate

Braiam

do we have a list of reasons why the 404?

Gilles

01:11

@Braiam why the 404 what?

Braiam

@Gilles repositories

apt returning 404 when updating/downloading packages list or packages

Gilles

@Braiam I don't think that would make sense

a website returns 404 when the URL doesn't exist, and that can be for any number of reasons

Braiam

well, apt isn't exactly a web browser

Seth

apt returns 404 when it receives a 404 from the server.. no?

@Braiam your comment is quite funny without context :-)

Faheem Mitha

@Gilles There is an outstanding bug where apt fails to find an existing file, I think.

I mean, the stuff is on the server, and is doesn't see it, as I recall.

@Braiam Do you remember any details about that?

Braiam

01:17

I only remember the hash sum mismatch @FaheemMitha

Faheem Mitha

@Braiam do you have a link/ref?

Braiam

@FaheemMitha bugs.debian.org/cgi-bin/bugreport.cgi?bug=624122

Faheem Mitha

@Braiam Hmm, I recall something else. Some syntax issue. maybe extra slashes or something?

I think maybe you answered it.

2

A: apt-get install gives 404 not found, but URL works

It's a bug on apt-get, that is not sending the correct GET headers, so the server answers with 404. For example, telnet to the server mirror.cs50.net at port 80 (HTTP), and enter the following (emulating an apt-get request): GET /appliance50/2014/debs/dists/trusty/main/binary-i386/./appliance50...

And here is the bug report I filed. bugs.debian.org/757039

No activity. Yay.

Braiam

@FaheemMitha no, in that case is easily reproducible, just get a proxy that returns an html page with a 200 or 304/5 http code, apt stores the html and when it tries to do the checksum it fails

@FaheemMitha ~~that's a server side issue, not actually apt fault~~ actually I don't know what's going on

Faheem Mitha

@Braiam True, but apt could work around it.

What was the topic again?

Braiam

01:24

404 not found because the files have been removed from the server, that question is an special case

Jordan Dolan

@FaheemMitha Hi Faheem - the simple answer is that I followed word-for-word the instructions given on the Mongo DB Debian installation website: docs.mongodb.org/manual/tutorial/install-mongodb-on-debian

Faheem Mitha

@JordanDolan Debian has its own packages. Always give those preference over third-party packages.

2

Though that does not justify brokenness in third-party packages, of course.

Jordan Dolan

:)

Faheem Mitha

01:41

@JordanDolan that bug report really needs more detail.

"results in a broken / corrupt install."?

You could add a link to the unix.sx question to start with. Include the information you posted there. Bottom line - a file that should be in the package is missing.

Jordan Dolan

Done; I cannot edit the JIRA description unfortunately but have added a comment.

Faheem Mitha

@JordanDolan ok

Self-contained bug reports are generally better, though. I personally would post the substance of that question (and a description of the underlying problem) into the bug report.

I see mongo is one of those nosql thingys. Never used it. Or any other nosql thingy for that matter.

slm

02:28

@Gilles thanks, I missed the mint 11 in the title. Rereading it the dup you mentioned is more appropriate. I'll reopen and then dup it against that one

Faheem Mitha

04:44

Hi @slm. How's it going?

derobert

07:49

@FaheemMitha hmmm, my sssd question got an answer! A useful one, even.

Faheem Mitha

@derobert Congratulations. Link?

@derobert I'm struggling with freaking multimedia crap.

derobert

1

A: Adding a system user to an LDAP group with SSSD

This was enabled in sssd 1.9.5, by setting sssd.conf to include: ldap_rfc2307_fallback_to_local_users = true https://fedorahosted.org/sssd/wiki/Releases/Notes-1.9.5

Faheem Mitha

Do you know how the good way to multiplex audio + subtitles for burning to dvd?

derobert

@FaheemMitha do you mean burning to dvd as DVD Video (i.e., for playback in a standard DVD player)? Or just for archiving media files?

Faheem Mitha

@derobert Well, I upvoted it on your sayso.

@derobert The former. Sorry for the ambiguity.

E.g.

faheem@orwell:/mnt/videobuild$ mencoder foo.mp4 -sub foo.srt -ovc lavc -oac copy -o foo.new.mp4
MEncoder svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team

WARNING: OUTPUT FILE FORMAT IS _AVI_. See -of help.
success: format: 0 data: 0x0 - 0x328e6eb4
libavformat version 53.21.1 (external)
Mismatching header version 53.19.0
libavformat file format detected.
[lavf] stream 0: video (h264), -vid 0
[lavf] stream 1: audio (aac), -aid 0, -alang eng
VIDEO: [H264] 1280x720 24bpp 23.976 fps 956.8 kbps (116.8 kbyte/s)

Talk about unhelpful errors.

derobert

08:03

@FaheemMitha Hmm... I don't normally make DVD Video... Last time I did, it was with dvdauthor. I think

Faheem Mitha

@derobert Ok, but the question here is about multiplexing (if that is the right word) a video file and a subtitles file.

derobert

@FaheemMitha I have no idea what you're trying to do there—it looks like you're trying to copy streams from one mp4 to another?? And maybe add an .srt sub, which I don't think mp4 does?

Faheem Mitha

If you don't know, don't worry about it.

derobert

DVD-Video requires its own very special subtitle format (vobsub).

Faheem Mitha

@derobert See above. The video doesn't have subtitles. I'm trying to add subtitles.

@derobert Oh. But I think maybe I'm burning the subtitles into the video directly. Or something like that. It's worked for me before. But not here.

derobert

08:05

@FaheemMitha Ohhh, if you want to do that, that's easy enough. First step, stop using mencoder!

Faheem Mitha

@derobert Ok?

Incidentally, audio info:

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1h 47mn
Bit rate mode : Variable
Bit rate : 93.7 Kbps
Maximum bit rate : 110 Kbps
Channel(s) : 2 channels

derobert

Second, you can't copy video (-ovc copy) while at the same time changing it (burning in a subtitle track)

Ah, in that case, third, AAC isn't an allowed audio format on DVD-Video.

Faheem Mitha

@derobert yippee.

One problem I was seeing was severe deterioration in the video quality on copy.

@derobert Yes, that makes sense, I guess.

derobert

ffmpeg -i foo.mp4 -i foo.srt -target ntsc-dvd (or pal-dvd) foo.vob

Faheem Mitha

@derobert so, do you have solutions to those things? If so, I can write a question.

derobert

08:09

that might work, not sure if that will hard-burn subtitles

Faheem Mitha

@derobert hmm. I've got a feeling I tried that once. Let me see.

I use ffmpeg as the first step for the video creation anyway.

but usually the output is mpeg.

derobert

trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo if that doesn't make subs right

These may require a recent ffmpeg; you can grab a static build from ffmpeg.org/download.html

Faheem Mitha

@derobert I did the recent ffmpeg thing a while back. You might not remember. You were there though, I think.

derobert

Right. I think that was you backporting it.

Faheem Mitha

@derobert yes, I have vague memories that it was something of a business.

the record is probably on this chat somewhere.

Anyway, that page looks complicated. Did you have any specific recommendations which of those might work?

derobert

08:14

@FaheemMitha the first one should work fine, which is just adding -vf subtitles=foo.srt

(instead of -i foo.srt)

Faheem Mitha

@derobert Ok, I'll try that then.

do it will literally just write into the video stream?

or should that be on top of it?

derobert

ffmpeg -i foo.mp4 -vf subtitles=foo.srt -target ntsc-dvd (or pal-dvd) foo.vob

that should encode everything from foo.mp4, with the substitles from foo.srt rendered on top, into foo.vob

Faheem Mitha

That produced:

[aac @ 0x149f040] The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.

@derobert I normally call it mpeg. Is that wrong?

derobert

@FaheemMitha you could add -c:a ac3... that should force the audio to AC-3. Which is probably what you want for DVD-Video

@FaheemMitha .mp4 was from your original line, I think. .mpeg should be fine for MPEG1/2 video

faheem@orwell:/mnt/videobuild$ mencoder foo.mp4 -sub foo.srt -ovc lavc -oac copy -o foo.new.mp4

... that's where I got foo.mp4 from

Faheem Mitha

@derobert So, ffmpeg -i foo.mp4 -vf subtitles=foo.srt -target ntsc-dvd -c:a ac3 foo.mpg ?

derobert

08:21

yeah, that should work. Feel free to add something like -t 60 to only do the first 60s to check that it is working

also, you may need various bitrate options

Faheem Mitha

@derobert what are those for?

derobert

@FaheemMitha If the quality is too low (up bitrate) or the output won't fit on the disc (lower bitrate)

Faheem Mitha

Wonder if it is worth asking a question about this. Searching the net for this stuff isn't particularly productive.

@derobert ok

what option should I use?

derobert

I'd leave it off to start with.

But if you want to get the maximal quality possible, you do a two-pass encode. You'd then pass a -b:v X (video bitrate) calculated to use up the entire disc. On the first pass, you'd do -pass 1 and expect it to miss the target by quite a bit. You run it again with -pass 2 and it should hit it. You also need to set -b:a (audio bitrate) and take that + muxing overhead into account when calculating the video bitrate you can use

wiki.archlinux.org/index.php/… has an example for MPEG-4, most of those extra flags they give are MPEG-4 tuning.

Faheem Mitha

@derobert I see. That sounds complicated. Should I create a question for this?

derobert

08:37

@FaheemMitha If you want. Though maybe on Video Production

Faheem Mitha

@derobert Would it be on-topic there?

And do you post there?

derobert

It appears they have other ffmpeg questions there. I haven't really posted there, though.

Faheem Mitha

@derobert Ok. Are you registered there?

Yes, a more specialist site might give better answers.

derobert

I'm registered there, and have even posted one answer

Faheem Mitha

@derobert Ok.

derobert

08:42

It's clearly on topic here too, it's a unix tool after all.

Faheem Mitha

Do you think this kind of question would be on-topic here?

@derobert Ah, Ok. But what does unix have to do with it?

derobert

one of our on topic things is "Applications packaged in *nix distributions (note: being cross-platform does not disqualify)"

Faheem Mitha

@derobert Oh, sorry, I misread. I thought you were talking about the other (video) site.

On balance, which do you think is a better place to post? I'd lean towards Video.

I've got to remember that site exists. I frequently have multimedia problems

derobert

@FaheemMitha Not sure. You asked your last ffmpeg question that turned out amazingly complicated to answer here... unix.stackexchange.com/a/175507/977 ... for actual video stuff, I suspect there are more knowledgeable people on video.se than here.

Faheem Mitha

@derobert Yes, I imagine that is true.

In fact, I think question might have a better home on Video.

derobert

08:48

Oddly we have more ffmpeg questions than them. Though maybe we're just bigger.

Faheem Mitha

Having said that, we can't be sure right now this site will stick around.

@derobert Hmm, the question is how many of them got good answers.

derobert

That'd require going through a bunch of them. Also how many of them were non-trivial.

Faheem Mitha

@derobert True

@derobert so U&L vs Video. Hmm.

How is the Video beta looking so far?

The question rate is not terrific

1544

Audio-Video Production – video.stackexchange.com

Beta Q&A site for engineers, producers, editors, and enthusiasts spanning the fields of audio, video, and media creation.

Currently in public beta.

Seems to be getting plenty of traffic though. In the end, that's probably the most important statistic.

That question you answered has surprisingly few views. Only 100 in 2 months.

derobert

@FaheemMitha Well, then your piles of ffmpeg questions will be helping them out :-)

Faheem Mitha

@derobert There are unlikely to be piles. But I guess the more the merrier. Unless you are SO.

@derobert btw, have you ever tried contributing to Debian Backports?

derobert

08:54

@FaheemMitha Not really. Forget, does one have to be a DD or DM?

Faheem Mitha

@derobert Neither, as far as I know.

Like with the regular Debian packages, in theory anyone can upload stuff. You just need to get a sponsor.

derobert

Hmmm, contributing guidelines seem to agree

Faheem Mitha

Of course, that can be easier said than done.

Ok, I'll try posting to video. Are you about to go to sleep?

derobert

@FaheemMitha Nope

Faheem Mitha

@derobert Ok. Still another night of sysadmin?

derobert

08:58

@FaheemMitha Nah, no work tonight. Tuesday night/Wednesday morning will probably be the next one.

Faheem Mitha

@derobert ok

Just created an account on Video.

derobert

Oddly enough, what I'm doing right now is... re-encoding some episodes of History Detectives.

Faheem Mitha

@derobert History Detectives?

History Detectives

History Detectives is a documentary television series on PBS. It features investigations made by members of a small team of researchers to identify and/or authenticate items which may have historical significance or connections to important historical events, and to answer specific questions brought to them about these artifacts. Common subjects are family heirlooms and historical structures. Its stated missions is "exploring the complexities of historical mysteries, searching out the facts, myths and conundrums that connect local folklore, family legends and interesting objects." Over its first...

derobert

pbs.org/opb/historydetectives

Faheem Mitha

Hmm.

derobert

09:02

ffmpeg -accurate_seek -ss 62.3 -i 1261_20150213105900.mpg -ss 62.3 -i 1261_20150213105900.708-service-01.eng.srt -map 0:v -map 0:a:1 -map 1: -c:v libx264 -filter:v 'idet, w3fdif=deint=interlaced' -c:a copy -preset slow -crf 20 -t 3319 'History Detectives/History Detectives S06E04.mkv'

Faheem Mitha

@derobert sometimes I think I should make backports publicly available instead of just making them for myself. I did post once to the backports list, but got no reply.

derobert

... that's the ffmpeg line I'm waiting for. Well, probably going to head downstairs, as the fan on this computer is really loud...

1261_20150213105900.mpg being MPEG TS from over-the-air TV.

Faheem Mitha

@derobert What is the purpose of this?

derobert

Deinterlace the interlaced parts (season 6 consists of mixed progressive & interlaced, of course not properly marked), and encode in H.264 to save some disk space.

Faheem Mitha

@derobert what is the problem with interlaced? whatever that is.

derobert

09:08

@FaheemMitha looks terrible on progressive (non-interlaced) displays

Faheem Mitha

@derobert oh

derobert

do a google image search for interlacing ... that'll explain

or:

Interlaced video

Interlaced video is a technique for doubling the perceived frame rate of a video display without consuming extra bandwidth. The interlaced signal contains two fields of a video frame captured at two different times. This enhances motion perception to the viewer, and reduces flicker by taking advantage of the phi phenomenon effect. This effectively doubles the time resolution (also called temporal resolution) as compared to non-interlaced footage (for frame rates equal to field rates). Interlaced signals require a display that is natively capable of showing the individual fields in a sequential...

Faheem Mitha

@derobert I see. Sounds like cheating. And I'm guessing this particular technique is receding into history.

At least in the West.

derobert

I wish it were!

Faheem Mitha

I think bandwidth has got up a lot there recently.

@derobert Oh. I thought the US just switched to HDTV. In 2009 I think it was.

derobert

09:15

It really should have never been put in ATSC... but it was.

The highest resolution anyone uses with US HDTV (ATSC) is 1080i... that's 1920x1080, interlaced.

Faheem Mitha

@derobert Oh. so this interlacing thing is alive and well? Bummer.

derobert

Yep. You can do 1920x1080@30 in ATSC, but not @60. If you want @60, you have to switch to 720p or interlaced. So people do interlaced.

Faheem Mitha

@derobert So this interlacing thing is something the broadcaster chooses to do, presumably.

derobert

Yes, usually. Though sometimes the people producing the content do it.

Faheem Mitha

@derobert Ok

derobert

09:19

And I've seen complete clusterf—, such as people producing content gave interlaced, TV station deinterlaced it, then TV station upscaled it, then TV station reinterlaced it.

Oh, and sometimes with some frames dropped/added to get a different frame rate

The best way to deal with video like that, so far as I can tell, is to wish death on everyone involved.

(And that clusterf— involved it being telecined, which is a 100% reversible interlacing process, the the TV station deinterlacing it with different method... which completely destroyed the ability to undo the telecine)

Faheem Mitha

@derobert Sounds like a mess.

derobert

Indeed. That's why death to all is the clear solution :-(

Anyway, I'm going downstairs... ping me and I should see it, eventually.

Faheem Mitha

@derobert Ok, I probably won't write it now, though. Nap time, probably.

slm

14:40

@FaheemMitha hey faheem. Things are good. Been busy with real life the last few months. Hopefully things will settle down more. History detectives is a great show BTW.

@derobert ^^^^

Faheem Mitha

@slm Oh, the new job? Not so new now, I guess.

slm

I've been moving to nc

I'm down here now.

Faheem Mitha

@slm Oh. From NY?

slm

Yeah

Faheem Mitha

That's a big move.

slm

14:43

Yeah

Faheem Mitha

Still working for Patrick's company?

slm

No starting a new job as well

Faheem Mitha

@slm Oh, I see. I used to live in NC. Are you moving to the Triangle, or Charlotte, or somewhere else?

slm

RTP area, companies inside the triangle on the border of Raleigh and cary

I have family down here already

Will be staying with them as we locate a home

Faheem Mitha

@slm Ah, Ok. That's a nice area.

I used in live in Chapel Hill, and more briefly, Durham.

slm

14:50

Yeah, it has grown so much its crazy

Yeah I knew you were here for a while

Faheem Mitha

@slm Chapel Hill hasn't changed much, I imagine. But parts of the Trisngle are growing, I guess.

slm

@FaheemMitha yeah I'm in the apex area now and it is so much more dense than even 2-3 yrs ago

Faheem Mitha

@slm Oh, really? That sucks.

slm

Haven't checked out chapel hill area yet

There used to be horses and farms out this way, not to many of those left

Faheem Mitha

@slm CH is pretty frozen. The Town Council keeps tight control of development. And Orange Country isn't that large anyway. When you drive over the border to Durham the difference is quite noticeable.

slm

14:55

Yeah I'm familiar with Durham

Faheem Mitha

@slm Hmm, yes, I suppose things have changed to some extent. Have you been familiar with NC for a while then?

slm

For the most part, my family's been here for 10+ yrs

Faheem Mitha

@slm Oh, I see.

slm

We visit quite regularly, so I see the area in snapshots which makes the growth more obvious

So that's why I've been more absent

Faheem Mitha

@slm I see. Yes, I heard rumors about crazy levels of influx in Chatham County for example.

slm

15:01

They are building tons of schools too, so the growth is def. Crazy

Faheem Mitha

@slm Shame. I liked that NC was spacious.

Faheem Mitha

15:51

@derobert video.stackexchange.com/q/15007/10422

Gilles

16:20

Can we reinstate the commenting moratorium between mikeserv and me?

For a brief time he made some constructive comments, but that only lasted, like, a week or so

Today he is actually making a constructive comment, but an incorrect one, which is a change of his usual nonsense but still something I'd prefer to live without

derobert

17:15

@slm I have a couple of the early episodes which you can't watch on PBS's website (or at least couldn't last I looked)... if you'd copies to somehow reach you...

S1 e 1, 4–8, 10; S2 e 2–5, 9–11, S3 e 1, 2, 4–7, 9–11 ...

They're not so great quality (they were aired on a 480i subchannel here)

And the missing ones are because those recordings had too bad (digital) reception to keep :-(

Or a few when MythTV blew up.

@FaheemMitha how did that ffmpeg line from earlier work?

Faheem Mitha

20:30

@derobert ffmpeg -i foo.mp4 -vf subtitles=foo.srt -target ntsc-dvd -c:a ac3 foo.mpg

derobert

20:47

@FaheemMitha I mean, how well did it work?

(on mobile chat, BTW)

Faheem Mitha

@derobert Oh, it looks good. I just created an ISO. Let me try to play direct from that.

There are various minor low level warnings. I.e.

MPlayer svn r34540 (Debian), built with gcc-4.7 (C) 2000-2012 MPlayer Team
mplayer: could not connect to socket
mplayer: No such file or directory
Failed to open LIRC support. You will not be able to use your remote control.

Playing foo.iso.
libavformat version 53.21.1 (external)
Mismatching header version 53.19.0
MPEG-PS file format detected.
VIDEO: MPEG2 720x480 (aspect 3) 29.970 fps 9000.0 kbps (1125.0 kbyte/s)
Load subtitles in ./
NVIDIA: API mismatch: the NVIDIA kernel module has version 304.117,

That NVIDIA error is a bit confusing. I have 125 everywhere in the packages.

And I don't know what the Unsupported PixelFormat stuff means.

The video itself looks good.

Question: do you happen to know how to adjust the size of the subtitles? Or change the color?

derobert

@FaheemMitha you probably need to reboot, that's the kernel module that's outdated. Either that or shut down X, unload the old module, and load the new one.

The AC3 error is somewhat weird.

Faheem Mitha

@derobert Hmm, Ok. My X server has been crashing quite a lot. Maybe because of that?

derobert

Could be because of that.

Faheem Mitha

No probably not. I last rebooted 15 days ago.

My computer guy has shut this machine down twice since X started crashing.

derobert

20:57

Somehow you have an old kernel module loaded.

Faheem Mitha

@derobert Yes. I see.

derobert

I think it's called nvidia.ko. Or something like that.

Faheem Mitha

@derobert ok

faheem@orwell:/mnt/videobuild$ dlocate nvidia.ko
nvidia-kernel-3.2.0-4-amd64: /lib/modules/3.2.0-4-amd64/nvidia/nvidia.ko
faheem@orwell:/mnt/videobuild$ dpkg -l nvidia-kernel-3.2.0-4-amd64
ii nvidia-kernel-3.2.0-4-amd64 304.125+1+1+3.2.65-1 amd64 NVIDIA binary kernel module for Linux 3.2.0-4-amd64

derobert

Actually check the filesystem, you may have one that isn't part of a package somewhere.

Has to be in /lib/modules though.

Unless you're loading it from initramfs.

(in which case it still came from there originally.)

@FaheemMitha I suspect modprobe has an option that'll tell you where it found the module.

Faheem Mitha

@derobert ok

derobert

21:04

@FaheemMitha also, you need to actually test the DVD-Video on a DVD player... Mplayer will play anything, including a lot of stuff DVD players will not.

Faheem Mitha

@derobert Sure.

root@orwell:/home/faheem# modprobe --show-depends nvidia
insmod /lib/modules/3.2.0-4-amd64/kernel/drivers/i2c/i2c-core.ko
insmod /lib/modules/3.2.0-4-amd64/nvidia/nvidia.ko NVreg_DeviceFileUID=0 NVreg_DeviceFileGID=44 NVreg_DeviceFileMode=0660

@derobert is there a way to produce this error more directly, without using mplayer?

derobert

@FaheemMitha sure, glxgears should do it.

Faheem Mitha

@derobert yes, that works

This might be an upstream screwup. apt thinks this is from the archives.

oot@orwell:/home/faheem# apt-cache policy nvidia-kernel-3.2.0-4-amd64
nvidia-kernel-3.2.0-4-amd64:
Installed: 304.125+1+1+3.2.65-1
Candidate: 304.125+1+1+3.2.65-1
Version table:
*** 304.125+1+1+3.2.65-1 0
500 http://debian.lcs.mit.edu/debian/ wheezy/non-free amd64 Packages
100 /var/lib/dpkg/status

derobert

21:20

If that's the only nVidia module you have, I guess it's possible the package has the wrong version. Not sure, modinfo on it might give you the version. Or strings.

Faheem Mitha

I wonder if there is some way of querying the version?

@derobert Ok, trying that.

modversion says: version: 304.125

Strings produces 304.125 too. But this version is from 7th Jan. I've rebooted the machine since then, certainly.

derobert

@FaheemMitha weird, unless you are indeed loading an older one in initramfs.

Faheem Mitha

@derobert Unlikely. How would that happen?

derobert

I have no idea when it tries to load it first.

But the error seems pretty clear that somehow you've got an older one loaded in the kernel.

Faheem Mitha

@derobert Yes.

derobert

21:27

I guess next time X crashes, shut down X, rmmod nvidia and load it again... See if that fixes the error message.

Faheem Mitha

@derobert Ok.

derobert

Or even insmod it by the complete path, to be sure you're getting the one you think you are.

Faheem Mitha

nvidia-settings also says 117. Huh.

Faheem Mitha

22:26

@derobert got a very good response, which is basically what you said.

1

A: Merging mp4 video stream with subtitles for use in creating DVD

Use the subtitles filter to create hardsubs ("burnt-in" subtitles): ffmpeg -i input.mp4 -vf subtitles=subs.srt -target pal-dvd output.mpg -target pal-dvd will make the output have a frame rate of 25 and a frame size of 720x576. If you want NTSC output instead for a frame rate of 30000/1001 an...

His Lord Neckbeard is evidently a ffmpeg specialist. Look at his SO page.

stackoverflow.com/users/1109017/…

I wonder if he is a dev.

Faheem Mitha

23:07

Hey, I just learned a new word.

Chrestomathy

Chrestomathy (/krɛsˈtɒməθi/ kres-TOM-ə-thee; from the Greek words χρήση, χρήστης, usage, user, and mathein, to learn) is a collection of choice literary passages, used especially as an aid in learning a subject. In philology or in the study of literature, it is a type of reader which presents a sequence of example texts, selected to demonstrate the development of language or literary style. It is different from an anthology because of its didactic purpose. == Examples == Bernhard Dorn, A Chrestomathy of the Pushtu or Afghan language, St. Petersburg: 1847 Mencken, H. L., A Mencken Chrestomathy,...

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