gmane.comp.video.mencoder.user

Re: How to know the exact codec

Rossana Guerra — 2012-05-25T04:33:40

2012/5/24 Gabri Nurtinaz Shally <gabri.ns< at >gmail.com>


It was because differnt frame rates, It couldn't join videos.

Regards

Rossana

Re: How to know the exact codec

Gabri Nurtinaz Shally — 2012-05-24T20:29:06

try putting -identity
btw, can you put here output of mencoder that failed you?

How to know the exact codec

Rossana Guerra — 2012-05-24T17:44:30

Hello, I didn'f find how to get this information from an AVI file.
Is it possible to do it?

Thanks and regards

Rossana

Re: M4V to WMV out of sync

Peter B. — 2012-05-16T17:58:10

Haven't opened one, yet.
I wrote about this on the ffmpeg mailing list a long time ago, and from
what I remember the answer was that this is not going to be
fixed/changed, as it is somehow container-dependent and conflicts with
ffmpeg's "all-in-one tool" properties.

I'll check if I can find the time to reproduce the problem in a
documented, trac-bugreport-suitable way ;)

Pb

Invitation à se connecter sur LinkedIn

Angelo Lama — 2012-05-15T22:10:55

LinkedIn
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MEncoder,

J'aimerais vous inviter à rejoindre mon réseau professionnel en ligne, sur le site LinkedIn.

Angelo

Angelo Lama
Enseignant chez Education Nationale
Région du Havre , France

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Re: How important are B-frames?

Gabri Nurtinaz Shally — 2012-05-13T09:31:04

bframes=0, 2 to 1, 3 to 2 and 4 to 3.

try reencoding by removing harddup option and add b_adapt=2 in x264 option

btw, which revision did you use?
because recently, using rev34??? i successfully transcoding Detective Conan
Movie 1-14 with high bframes settings. the minimum is 9 and some of them is
15.
well, the one with bframes=15 is not playable using MPC-HC tough.
i try high bframes because i want to use very low bitrate, 400kbps for
720x400< at >23.97fps material.
and when i rewatching all of them, i feel satisfied.

Re: How important are B-frames?

Janos Szamosfalvi — 2012-05-13T06:10:37


I did a bit of testing to see what happens with different bframes 
settings. There's a significant reduction in size and jump in 
quality from 0 to 1, but the effect of additional bframes is 
a bit dubious.  And mencoder crashed with bframes=4....  :( 

See attached .txt for full result.  

I also attached a small image from excel to show the important 
parameters: size and SSIM.  Note: on the x axis, 1 corresponds to bframes=0, 2 to 1, 3 to 2 and 4 to 3.

Of course results can easily be different with different settings 
and a different file, but IMHO, as long as bframes are supported, 
at the very least, bframes=1 should be used. mencoder -msglevel all=5 dvd://1 -dvd-device k: -alang en -slang en -of lavf -lavfopts format=mp4 -o tmp1.mp4 -srate 44100 -af resample=44100:0:1,format=s16le -oac mp3lame -lameopts cbr:br=128 -ofps 24000/1001 -vf crop=704:480:10:0,scale=800:600,harddup  -ovc x264 -x264encopts bitrate=1000:bframes=4:b_pyramid=normal:weight_b:keyint=24:psnr:ssim:pass=1:turbo
mencoder -msglevel a

Adding subtitles during live tv:// (Webcam)recording

Sebastian — 2012-05-12T18:27:53

Hi,

I want to record a Webcam picture and add a OSD (Subtitles) to the recorded video. the text is generated by a measurement device, and I can convert it into the format which is necessary.

Greetz from Munich

Sebastian

Re: How important are B-frames?

Janos Szamosfalvi — 2012-05-12T06:57:51


Why did the development stop on mencoder?

Re: How important are B-frames?

Reimar Döffinger — 2012-05-11T18:01:25

I don't remember the time someone was actively working on it.
So probably something like more than 6 years ago.
It doesn't really mean issues with it will certainly not be fixed,
but you should expect that issues it has might never be fixed any longer.

Re: M4V to WMV out of sync

Carl Eugen Hoyos — 2012-05-11T16:03:16


Which FFmpeg ticket is this?

Carl Eugen

Re: M4V to WMV out of sync

Gabri Nurtinaz Shally — 2012-05-11T16:09:19

is that so? i tought what you mean was using cat and/or named pipe.
this is the first time i hear it.
i'll try to look for it...

Re: M4V to WMV out of sync

Carl Eugen Hoyos — 2012-05-11T16:02:47


You may misunderstand, there is a new FFmpeg protocol called 
"concat" that should allow to concatenate several input 
files (I have not tested it yet).

Carl Eugen

Re: M4V to WMV out of sync

Peter B. — 2012-05-11T15:59:51

I'll quickly jump on this thread, because I'm also heavily depending on
mencoder, because FFmpeg can't split/merge files with audio-sample
precision.

So, even though I don't like to use unmaintained apps, I'm currently
somewhat forced to use mencoder...

Regards,
Pb

Re: M4V to WMV out of sync

Gabri Nurtinaz Shally — 2012-05-11T15:22:45

i know the work around, it just that i don't have enough space. beside,
isn't convert it to mpeg first will just hurt the quality?


i read at the mailing list that its not some thing important.

i like the way mplayer/mencoder work, its filter chain, its documentation,
etc.

fyi, i can even multipass encoding while joining multiple file. its as if
the encoder only know that there is just one stream.

Re: M4V to WMV out of sync

Carl Eugen Hoyos — 2012-05-11T15:10:27


(I did not want to imply that FFmpeg has no deficiencies 
over MEncoder, just that it might make more sense to 
report them to the FFmpeg developers than reporting bugs 
here.)


Yes, this is ticket #681, consider adding yourself to CC.

Carl Eugen

Re: M4V to WMV out of sync

Carl Eugen Hoyos — 2012-05-11T15:08:39


Did you test concat: ?


(Assuming concat: does not work as you expect)
Why do you think so?

Carl Eugen

Re: M4V to WMV out of sync

Gabri Nurtinaz Shally — 2012-05-11T15:04:57

30, I

for me, its capability to join multiple file into one.
i've read this issue in FFmpeg user mailing list, and don't think it will
supported anytime soon.

Re: M4V to WMV out of sync

L. Lee — 2012-05-11T15:00:44

I don't know why Wietze <at> gmail.com prefers MEncoder, but I prefer it
because I can't perform pullup with ffmpeg. If I convert frame rate to 30, I
can get 3 normal frames followed by 2 blurred ones, and if I add
"-deinterlace" I can get frame 5 to duplicate frame 4. Neither of those
compromises are completely satisfying. Can ffmpeg do pullup yet?

Laine Lee


On 5/11/12 9:16 AM, "Carl Eugen Hoyos" <cehoyos< at >ag.or.at> wrote:

Re: M4V to WMV out of sync

Carl Eugen Hoyos — 2012-05-11T14:16:47


That is unlikely given that MEncoder is not actively maintained 
for several years.

If you explain why you prefer MEncoder over FFmpeg, there is 
some chance that this will be fixed in FFmpeg.

Carl Eugen

Re: M4V to WMV out of sync

Wietze — 2012-05-11T12:32:12

This ffmpeg command transcoded my M4V file correctly to WMV. I hope it will
somehow be fixed in Mencoder.