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Damn codecs!
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Jeff Layman
Feb 13, 2016, 12:28:39 PM2/13/16
to
I have a dashcam I fitted a couple of weeks ago. It records in HD as
*.avi files. I have no problem playing these on the laptop in VLC. etc.
I thought I'd play them on my Panasonic TV, which can play *.avi files
an USB sticks.
So I plug in the stick and try to play the video: "File not supported"
pops up. After a bit of checking I found it was the audio codec causing
the problem. For some reason the dashcam records as the somewhat unusual
codec PCM S16 LE (araw). Fortunately VLC was able to convert it to mpeg
(mp4). The TV had no problem playing the file with this audio codec.
--
Jeff
*.avi files. I have no problem playing these on the laptop in VLC. etc.
I thought I'd play them on my Panasonic TV, which can play *.avi files
an USB sticks.
So I plug in the stick and try to play the video: "File not supported"
pops up. After a bit of checking I found it was the audio codec causing
the problem. For some reason the dashcam records as the somewhat unusual
codec PCM S16 LE (araw). Fortunately VLC was able to convert it to mpeg
(mp4). The TV had no problem playing the file with this audio codec.
--
Jeff
Jim Lesurf
Feb 13, 2016, 12:56:04 PM2/13/16
to
In article <n9np46$pp4$1...@news.albasani.net>, Jeff Layman
is S16_LE. It's actually a good choice for an AV recording as it avoids
lossy conversion and give you the raw data to process as you prefer.
However this may simply underline what has been discussed in other threads.
That the makers of 'smart TV' sets simply impliment one or two codecs so
they can play. Then tick the box for "plays files" and don't care further.
> Fortunately VLC was able to convert it to mpeg (mp4). The TV had no
> problem playing the file with this audio codec.
Tells you a lot about the TV.
Jim
--
Please use the address on the audiomisc page if you wish to email me.
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
<JMLa...@invalid.invalid> wrote:
> I have a dashcam I fitted a couple of weeks ago. It records in HD as
> *.avi files. I have no problem playing these on the laptop in VLC. etc.
> I thought I'd play them on my Panasonic TV, which can play *.avi files
> an USB sticks.
> So I plug in the stick and try to play the video: "File not supported"
> pops up. After a bit of checking I found it was the audio codec causing
> the problem. For some reason the dashcam records as the somewhat
> unusual codec PCM S16 LE (araw).
Not particularly "unusual". IIRC The standard wave format for 16 bit LPCM
> I have a dashcam I fitted a couple of weeks ago. It records in HD as
> *.avi files. I have no problem playing these on the laptop in VLC. etc.
> I thought I'd play them on my Panasonic TV, which can play *.avi files
> an USB sticks.
> So I plug in the stick and try to play the video: "File not supported"
> pops up. After a bit of checking I found it was the audio codec causing
> the problem. For some reason the dashcam records as the somewhat
> unusual codec PCM S16 LE (araw).
is S16_LE. It's actually a good choice for an AV recording as it avoids
lossy conversion and give you the raw data to process as you prefer.
However this may simply underline what has been discussed in other threads.
That the makers of 'smart TV' sets simply impliment one or two codecs so
they can play. Then tick the box for "plays files" and don't care further.
> Fortunately VLC was able to convert it to mpeg (mp4). The TV had no
> problem playing the file with this audio codec.
Jim
--
Please use the address on the audiomisc page if you wish to email me.
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
Jeff Layman
Feb 13, 2016, 2:27:14 PM2/13/16
to
On 13/02/16 17:53, Jim Lesurf wrote:
> In article <n9np46$pp4$1...@news.albasani.net>, Jeff Layman
> <JMLa...@invalid.invalid> wrote:
>> I have a dashcam I fitted a couple of weeks ago. It records in HD as
>> *.avi files. I have no problem playing these on the laptop in VLC. etc.
>> I thought I'd play them on my Panasonic TV, which can play *.avi files
>> an USB sticks.
>
>> So I plug in the stick and try to play the video: "File not supported"
>> pops up. After a bit of checking I found it was the audio codec causing
>> the problem. For some reason the dashcam records as the somewhat
>> unusual codec PCM S16 LE (araw).
>
>
> Not particularly "unusual". IIRC The standard wave format for 16 bit LPCM
> is S16_LE. It's actually a good choice for an AV recording as it avoids
> lossy conversion and give you the raw data to process as you prefer.
But why would a dashcam manufacturer be interested in raw audio? Surely
> In article <n9np46$pp4$1...@news.albasani.net>, Jeff Layman
> <JMLa...@invalid.invalid> wrote:
>> I have a dashcam I fitted a couple of weeks ago. It records in HD as
>> *.avi files. I have no problem playing these on the laptop in VLC. etc.
>> I thought I'd play them on my Panasonic TV, which can play *.avi files
>> an USB sticks.
>
>> So I plug in the stick and try to play the video: "File not supported"
>> pops up. After a bit of checking I found it was the audio codec causing
>> the problem. For some reason the dashcam records as the somewhat
>> unusual codec PCM S16 LE (araw).
>
>
> Not particularly "unusual". IIRC The standard wave format for 16 bit LPCM
> is S16_LE. It's actually a good choice for an AV recording as it avoids
> lossy conversion and give you the raw data to process as you prefer.
the video is more important (I think the video codec was H.264).
> However this may simply underline what has been discussed in other threads.
> That the makers of 'smart TV' sets simply impliment one or two codecs so
> they can play. Then tick the box for "plays files" and don't care further.
about codecs. The detailed TV manual ("EHelp") states that the supported
video formats include AVI and MP4 (there are a further 7 it supports).
For AVI, the audio codecs supported are AAC, ADPCM, Dolby Digital, Dolby
Digital Plus, HE-AAC, LPCM, MP3, WMA, WMA Pro. For MP4, they are AAC,
Dolby Digital, Dolby Digital Plus, HE-AAC, MP3. VLC converted the AVI to
an MP4 file, with the codec MPEG Audio layer 1/2 (mp4a). But that codec
does not specifically appear under MP4 in the manual. Is it the same as mp3?
>> Fortunately VLC was able to convert it to mpeg (mp4). The TV had no
>> problem playing the file with this audio codec.
>
> Tells you a lot about the TV.
support, and those they won't?
--
Jeff
Jim Lesurf
Feb 14, 2016, 6:07:10 AM2/14/16
to
In article <n9o02g$78q$1...@news.albasani.net>, Jeff Layman
they can save themselves cost and bother by simply recording that. No codec
costs. And as I said, having LPCM means no added loss.
> > However this may simply underline what has been discussed in other
> > threads. That the makers of 'smart TV' sets simply impliment one or
> > two codecs so they can play. Then tick the box for "plays files" and
> > don't care further.
> >
containers and tick the 'plays files' box on the advertising and user
manual. They may choose whatever they find convenient given what they've
done before or things they have available. Once you've bought it, it's not
their problem squire, it does what it said on the tin. :-)
They only want you to buy the set and not return it with a valid complaint.
By then they'll be working on the model they expect to sell you in a couple
of year's time... because your set won't do something you want.
<JMLa...@invalid.invalid> wrote:
> >
> > Not particularly "unusual". IIRC The standard wave format for 16 bit
> > LPCM is S16_LE. It's actually a good choice for an AV recording as it
> > avoids lossy conversion and give you the raw data to process as you
> > prefer.
> But why would a dashcam manufacturer be interested in raw audio? Surely
> the video is more important (I think the video codec was H.264).
The default output of a basic ADC would likely be LPCM. If they don't care,
> >
> > Not particularly "unusual". IIRC The standard wave format for 16 bit
> > LPCM is S16_LE. It's actually a good choice for an AV recording as it
> > avoids lossy conversion and give you the raw data to process as you
> > prefer.
> But why would a dashcam manufacturer be interested in raw audio? Surely
> the video is more important (I think the video codec was H.264).
they can save themselves cost and bother by simply recording that. No codec
costs. And as I said, having LPCM means no added loss.
> > However this may simply underline what has been discussed in other
> > threads. That the makers of 'smart TV' sets simply impliment one or
> > two codecs so they can play. Then tick the box for "plays files" and
> > don't care further.
> >
> > Tells you a lot about the TV.
> How do the TV manufacturers decide what formats and codecs they will
> support, and those they won't?
They don't care. All they have to do is impliment one or a few codecs and
> How do the TV manufacturers decide what formats and codecs they will
> support, and those they won't?
containers and tick the 'plays files' box on the advertising and user
manual. They may choose whatever they find convenient given what they've
done before or things they have available. Once you've bought it, it's not
their problem squire, it does what it said on the tin. :-)
They only want you to buy the set and not return it with a valid complaint.
By then they'll be working on the model they expect to sell you in a couple
of year's time... because your set won't do something you want.
Brian Gaff
Feb 14, 2016, 12:43:26 PM2/14/16
to
I've been having issues with M4u and similar from apple devices. It seems
that sometimes I can and sometimes I cannot play these for no apparent
reason.
If I load them into goldwave and save them out as something else then they
will play. seems Goldwaves codecs work better than those in the klite pack
and other media players in this instance.
Thank god I do not have to get involved with video as well.
Brian
"Jeff Layman" <JMLa...@invalid.invalid> wrote in message
news:n9np46$pp4$1...@news.albasani.net...
--
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
bri...@blueyonder.co.uk
Blind user, so no pictures please!
that sometimes I can and sometimes I cannot play these for no apparent
reason.
If I load them into goldwave and save them out as something else then they
will play. seems Goldwaves codecs work better than those in the klite pack
and other media players in this instance.
Thank god I do not have to get involved with video as well.
Brian
"Jeff Layman" <JMLa...@invalid.invalid> wrote in message
news:n9np46$pp4$1...@news.albasani.net...
----- -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
bri...@blueyonder.co.uk
Blind user, so no pictures please!
Norman Rowing
Feb 14, 2016, 2:22:52 PM2/14/16
to
who said 'that's correct they aren't supposed to'. I asked why not and
pointed out that nowhere in the advertising or packaging did it say a
dedicated camera was needed.
It's a shame as the set itself is a terrific unit.
I suspect there is some way to bodge the USB socket so that a normal
camera would work.
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