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[VIDEO] MPEG2 Muxed -> AVI

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  [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-06 10:09 +0100
    Re: [VIDEO] MPEG2 Muxed -> AVI sbt <dogbreath@chaseabone.com.invalid> - 2011-03-06 06:29 -0800
      Re: [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-06 16:05 +0100
        Re: [VIDEO] MPEG2 Muxed -> AVI sbt <dogbreath@chaseabone.com.invalid> - 2011-03-06 20:20 -0800
          Re: [VIDEO] MPEG2 Muxed -> AVI dempson@actrix.gen.nz (David Empson) - 2011-03-07 22:40 +1300
          Re: [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-07 11:08 +0100
    Re: [VIDEO] MPEG2 Muxed -> AVI Warren Oates <warren.oates@gmail.com> - 2011-03-06 09:44 -0500
      Re: [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-06 16:12 +0100
        Re: [VIDEO] MPEG2 Muxed -> AVI Warren Oates <warren.oates@gmail.com> - 2011-03-06 11:35 -0500
          Re: [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-06 19:00 +0100
            Re: [VIDEO] MPEG2 Muxed -> AVI Warren Oates <warren.oates@gmail.com> - 2011-03-06 14:41 -0500
              Re: [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-06 21:55 +0100
                Re: [VIDEO] MPEG2 Muxed -> AVI "Wayne C. Morris" <wayne.morris@this.is.invalid> - 2011-03-06 20:40 -0600
    Re: [VIDEO] MPEG2 Muxed -> AVI Jolly Roger <jollyroger@pobox.com> - 2011-03-06 16:03 +0000
      Re: [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-06 17:13 +0100
    Re: [VIDEO] MPEG2 Muxed -> AVI Lewis <g.kreme@gmail.com.dontsendmecopies> - 2011-03-07 06:08 +0000
      Re: [VIDEO] MPEG2 Muxed -> AVI Jazzman <jazz.man@tiscali.it> - 2011-03-07 11:25 +0100

#454 — [VIDEO] MPEG2 Muxed -> AVI

My DTT decoder records in MPEG2 Muxed format. I would like to import the
decoder's files, edit them and save the result into some other format
(e.g. AVI with a codec available from QuickTime).

Does anyone know of an editor - preferably in the free software camp -
that will do this; or, alternatively, a component to install in order to
enable iMovie to read and edit MPEG2 Muxed files?

I've tried MPEG Streamclip, but it's still too buggy, with frequent
hang-ups and crashes.

TIA!

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#455

In article <slrnin6jqj.u58.jazz.man@jazzmans.swingbox>, Jazzman
<jazz.man@tiscali.it> wrote:

> My DTT decoder records in MPEG2 Muxed format. I would like to import the
> decoder's files, edit them and save the result into some other format
> (e.g. AVI with a codec available from QuickTime).
> 
> Does anyone know of an editor - preferably in the free software camp -
> that will do this; or, alternatively, a component to install in order to
> enable iMovie to read and edit MPEG2 Muxed files?
> 
> I've tried MPEG Streamclip, but it's still too buggy, with frequent
> hang-ups and crashes.
> 
> TIA!

Not quite free, since you would need to get the MPEG-2 QuickTime codec
from Apple. There could still be a problem with the audio if it is
Dolby (AC3), since the MPEG-2 codec doesn't play well (or at all) with
Dolby.

However, I would suggest that you do your conversion first, using
something like ffmpegX. Then, you have your choice of editors, such as
iMovie or Final Cut Express.

-- 
Spenser

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#458

sbt <dogbreath@chaseabone.com.invalid> dixit:

> However, I would suggest that you do your conversion first, using
> something like ffmpegX. Then, you have your choice of editors, such as
> iMovie or Final Cut Express.


Good point, especially since I already have command-line ffmpeg
installed from the ports.

Which intermediate video format would you suggest to convert to for
editing?  I'd like an uncompressed (or non-lossily compressed) format,
in order to retain the original quality before the final compression.

Thank you!

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#477

In article <slrnin78m5.u58.jazz.man@jazzmans.swingbox>, Jazzman
<jazz.man@tiscali.it> wrote:

> sbt <dogbreath@chaseabone.com.invalid> dixit:
> 
> > However, I would suggest that you do your conversion first, using
> > something like ffmpegX. Then, you have your choice of editors, such as
> > iMovie or Final Cut Express.
> 
> 
> Good point, especially since I already have command-line ffmpeg
> installed from the ports.
> 
> Which intermediate video format would you suggest to convert to for
> editing?  I'd like an uncompressed (or non-lossily compressed) format,
> in order to retain the original quality before the final compression.
> 
> Thank you!

Supposing you have the available disk space, go to DVStream (it's about
2GB/hr) but is the closest thing you'll find to uncompressed video and
is the format you get when iMovie imports from a tape (the old MiniDV
tapes used with FireWire camcorders).

-- 
Spenser

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#483

sbt <dogbreath@chaseabone.com.invalid> wrote:

> In article <slrnin78m5.u58.jazz.man@jazzmans.swingbox>, Jazzman
> <jazz.man@tiscali.it> wrote:
> 
> > sbt <dogbreath@chaseabone.com.invalid> dixit:
> > 
> > > However, I would suggest that you do your conversion first, using
> > > something like ffmpegX. Then, you have your choice of editors, such as
> > > iMovie or Final Cut Express.
> > 
> > 
> > Good point, especially since I already have command-line ffmpeg
> > installed from the ports.
> > 
> > Which intermediate video format would you suggest to convert to for
> > editing?  I'd like an uncompressed (or non-lossily compressed) format,
> > in order to retain the original quality before the final compression.
> > 
> > Thank you!
> 
> Supposing you have the available disk space, go to DVStream (it's about
> 2GB/hr) but is the closest thing you'll find to uncompressed video and
> is the format you get when iMovie imports from a tape (the old MiniDV
> tapes used with FireWire camcorders).

Right, except you are rather short on the amount of disk space required.

Standard definition DV requires 25 Mbps for video plus typically another
1.5 Mbps for audio.

26.5 Mbps is 11.925 GB per hour.

-- 
David Empson
dempson@actrix.gen.nz

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#484

sbt <dogbreath@chaseabone.com.invalid> dixit:

> Supposing you have the available disk space, go to DVStream (it's about
> 2GB/hr) but is the closest thing you'll find to uncompressed video


Interesting, I'm going to try this.

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#457

In article <slrnin6jqj.u58.jazz.man@jazzmans.swingbox>,
 Jazzman <jazz.man@tiscali.it> wrote:

> I've tried MPEG Streamclip, but it's still too buggy, with frequent
> hang-ups and crashes.

Streamclip isn't really designed for editing even though it has some 
editing features. If Streamclip actually reads your MPEG2 files, then I 
reckon you've got the MPEG2 "component" from Apple? MPEG2 isn't really 
designed for editing at all, certainly when it's muxed.

Anyway, use Streamclip to demux your original files into some formats 
that are good for editing (DV and aiff come to mind) with iMovie. 
Streamclip is very good at this. 

You can alternately use ffmpeg from the command line (no MPEG2 tax needs 
to be paid) or ffmpegX from the Finder.

http://www.ffmpegx.com/
-- 
If you could teach a cat to dance, 
you'd never have to leave the house.
  -- Pat Sajak

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#459

Warren Oates <warren.oates@gmail.com> dixit:

> Streamclip isn't really designed for editing even though it has some 
> editing features. If Streamclip actually reads your MPEG2 files, then I 
> reckon you've got the MPEG2 "component" from Apple?


Actually, I don't. Streamclip probably has a built-in MPEG2 decoder.


> Anyway, use Streamclip to demux your original files into some formats
> that are good for editing (DV and aiff come to mind) with iMovie.
> Streamclip is very good at this. 


Good advice. AIFF would be perfect for the audio track, being
uncompressed. I'd like to edit the video in a similarly uncompressed
video format before final compression, but ISTR that DV is compressed.

What video format should I use to retain the original quality during
editing?

Thank you!

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#464

In article <slrnin7936.u58.jazz.man@jazzmans.swingbox>,
 Jazzman <jazz.man@tiscali.it> wrote:

> Actually, I don't. Streamclip probably has a built-in MPEG2 decoder.
> 

From the Streamclip guide:

"MPEG Streamclip supports MPEG-1 video, MPEG layer 1/2 audio, AC3/A52 
audio and PCM audio. MPEG-2 video is supported in conversions, but for 
playback and export you have to buy the MPEG-2 Playback Component 
($19.99) from Apple."

So if you're seeing MPEG2 playback, you probably have the component. Do 
you have Final Cut Express or something?

> Good advice. AIFF would be perfect for the audio track, being
> uncompressed. I'd like to edit the video in a similarly uncompressed
> video format before final compression, but ISTR that DV is compressed.
> 
> What video format should I use to retain the original quality during
> editing?

DV. It's as good as you're going to get from MPEG2. You can also use 
.wav for the audio. Nobody uses compressed audio for editing.
-- 
If you could teach a cat to dance, 
you'd never have to leave the house.
  -- Pat Sajak

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#465

Warren Oates <warren.oates@gmail.com> dixit:

> So if you're seeing MPEG2 playback, you probably have the component. Do 
> you have Final Cut Express or something?


Wait... you're right: To my surprise, I do have a
'/Library/QuickTime/AppleMPEG2Codec.component'. It must have come as
part of Logic Studio, unbeknownst to me.


> DV. It's as good as you're going to get from MPEG2. You can also use 
> .wav for the audio. Nobody uses compressed audio for editing.


OK, I'm trying Streamclip's "Export to DV" feature. It doesn't seem to
demux it, though. It can only demux to an "m2v" format that's unknown to
iMovie. I would have preferred to demux it to an uncompressed format,
but I guess the file sizes would likely be unmanageable.

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#468

In article <slrnin7iu2.u58.jazz.man@jazzmans.swingbox>,
 Jazzman <jazz.man@tiscali.it> wrote:

> OK, I'm trying Streamclip's "Export to DV" feature. It doesn't seem to
> demux it, though. It can only demux to an "m2v" format that's unknown to
> iMovie. I would have preferred to demux it to an uncompressed format,
> but I guess the file sizes would likely be unmanageable.

For these porpoises, there is no "uncompressed format." MPEG2 is already 
heavily compressed, anyway. What audio format is muxed in with the 
MPEG2? Now that I think about it, what DTT decoder are you using? Does 
it give you choices about how it records?

I don't have iMovie here to play with, but you should be able to import 
your resulting DV file into iMovie, and drag it into your timeline and 
see discrete video and audio tracks. The "DV Audio" is PCM, 16-bit 
(aiff, more or less).

What's your final output going to be? 

If you have QT Pro, you can use it's export feature to create a DV 
stream too. You don't get any better control than with Streamclip, 
though.
-- 
If you could teach a cat to dance, 
you'd never have to leave the house.
  -- Pat Sajak

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#469

Warren Oates <warren.oates@gmail.com> dixit:

> For these porpoises, there is no "uncompressed format." MPEG2 is
> already heavily compressed, anyway.


Sure, but I'm re-compressing it when I export it to DV for editing, thus
losing more quality from the MPEG2 source.


> What audio format is muxed in with the MPEG2?


ffmpeg reports the audio track as "mp2, 48000 Hz, stereo, s16, 192 kb/s".


> Now that I think about it, what DTT decoder are you using? Does 
> it give you choices about how it records?


Unfortunately not. The decoder is a Telesystem TS-6290. I can't find a
page in English for it, anyhow it's this one:

<http://www.telesystem-world.com/web/it_en/electronic/catalogue/9/ricevitori-digitali-terrestri/734/decoder-con-doppio-tuner-digitale-terrestre-e-porta-usb.html>


> I don't have iMovie here to play with, but you should be able to
> import your resulting DV file into iMovie, and drag it into your
> timeline and see discrete video and audio tracks. The "DV Audio" is
> PCM, 16-bit (aiff, more or less).


I'll have to play around with iMovie a bit to figure it out. As of now,
the DV import has succeeded and I'm seeing a grid of frames.


> What's your final output going to be? 


I want to make an AVI file, probably using the H.261 codec, which I've
found to give me the most compatibility across platforms. MP3 for audio.

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#476

In article <slrnin7t5d.u58.jazz.man@jazzmans.swingbox>,
 Jazzman <jazz.man@tiscali.it> wrote:

> Warren Oates <warren.oates@gmail.com> dixit:
> 
> > For these porpoises, there is no "uncompressed format." MPEG2 is
> > already heavily compressed, anyway.
> 
> Sure, but I'm re-compressing it when I export it to DV for editing, thus
> losing more quality from the MPEG2 source.

You can do lossless editing of MPEG2 with the right software.  If a cut starts 
and ends on GOP boundaries (I-frames), there's no need to recompress anything.  
If a cut starts or ends in the middle of a GOP, reencoding is required -- but a 
good program will only reencode the video between i-frames before and after the 
cut, leaving the rest of the video as it is.

I've done this on Windows, but I haven't found software that'll do it on my old 
G4 Mac.  I don't know if there's anything like that for Intel Macs.

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#460

Jazzman <jazz.man@tiscali.it> wrote:
> My DTT decoder 

Just curious: by DTT do you mean digital terrestrial television?:

<http://en.m.wikipedia.org/wiki/Digital_terrestrial_television>

-- 
Posted from my iPhone.

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#462

Jolly Roger <jollyroger@pobox.com> dixit:

> Just curious: by DTT do you mean digital terrestrial television?:


Yes, exactly.

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#481

In message <slrnin6jqj.u58.jazz.man@jazzmans.swingbox> 
  Jazzman <jazz.man@tiscali.it> wrote:
> My DTT decoder records in MPEG2 Muxed format. I would like to import the
> decoder's files, edit them and save the result into some other format
> (e.g. AVI with a codec available from QuickTime).

You can look for a commercial stripper. I think they are basically
python scripts that use ffmpeg to scan for the commercial markers.

> Does anyone know of an editor - preferably in the free software camp -
> that will do this; or, alternatively, a component to install in order to
> enable iMovie to read and edit MPEG2 Muxed files?

Once they are edited, I would convert them automatically with
HandBrakeCLI


-- 
Belief is one of the most powerful organic forces in the multiverse. It
may not be able to move mountains, exactly. But it can create someone
who can. 

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#485

Lewis <g.kreme@gmail.com.dontsendmecopies> dixit:

> You can look for a commercial stripper. I think they are basically
> python scripts that use ffmpeg to scan for the commercial markers.


Whoa... I didn't know this kind of stuff existed. If you have any
examples in mind, please bring them up: the keywords for this aren't
very search engine friendly; especially "stripper" 8-|

Thank you!

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