YouTube downloads - only mono?

[pipoca]

Hello All,

Kubuntu 9.04 - KDE 4.3.1 - Firefox 3.0.14 - FlashGot 1.2.0.4

Excellent product! However, the audio in YouTube downloads are only in mono. Is it possible to get the audio tracks in stereo?

TIA,

Pipoca
S. Paulo - Brazil

[Giorgio Maone]

This does not depend on FlashGot, but on the player used to reproduce those videos.
Are they stereo when played on Youtube?
If they are, there will surely be some player able to reproduce them in stereo even if offline. Try to search for "flv" or "mp4" in your application manager.

[pipoca]

Thanks for your quick reply.

Yes, the videos are in stereo when played on YouTube. I've opened the FLVs with the following apps:
- VLC (VideoLan)
- MPlayer
- Audacity
- Kdenlive
- Kaffeine
And the audio tracks are always in mono.

Thanks again,

Pipoca
S. Paulo, Brazil

[therube]

URL of this youtube page/file?

[GµårÐïåñ]

I still don't get how FlashGot would affect the audio channels of a binary file that has been encoded independent of it? Am I missing something here?

[Giorgio Maone]

I still don't get how FlashGot would affect the audio channels of a binary file that has been encoded independent of it? Am I missing something here?

You're correct, indeed.
In facts, the sense of my first answer is that FlashGot has nothing to do with video/audio encoding, so if a problem exists is in the player.

[GµårÐïåñ]

Ok, good to know I am not completely losing my mind. Thank you.

[pipoca]

URL of this youtube page/file?

For example: http://www.youtube.com/watch?v=_w4Xulsjo5I

This seems to be a rather common problem: google for "flv mono stereo".

Thanks for your interest,

Pipoca
S. Paulo - Brazil

[therube]

MediaInfo says this of (the audio in) Falco___Der_Kommissar.flv:

Code: Select all

Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : Yes
Format settings, PS              : No
Duration                         : 3mn 42s
Bit rate                         : 68.2 Kbps
Channel(s)                       : 2 channels
Channel positions                : L R
Sampling rate                    : 44.1 KHz

The extracted (with Moitah FLV Extract) AAC file says:

Code: Select all

Format                           : AAC
Format/Info                      : Advanced Audio Codec
Format version                   : Version 4
Format profile                   : LC
Format settings, SBR             : Yes
Format settings, PS              : No
Muxing mode                      : ADTS
Bit rate mode                    : Variable
Channel(s)                       : 2 channels
Sampling rate                    : 44.1 KHz
Resolution                       : 16 bits
Stream size                      : 1.83 MiB (100%)

(Alas, I only have 1 speaker on my computer so EVERYTHING is in mono .)

[GµårÐïåñ]

I have stereo subwoofer system and it plays just fine, so not sure of the issue. Ultimately it comes down to the fact that FlashGot does NOT change or modify or affect the ENCODING of a media file, period. Now if there is a mono version, stereo version, super duper purple kush versions and FlashGot is grabbing the wrong one, fine I can see that as something to look into but otherwise it a moot and irrelevant issue.

[pipoca]

Hi All,

Please note that I'm running Kubuntu Linux, and probably this problem is related to the libs and apps of this platform. I'll investigate further and keep you informed of my findings.

Thanks to all,

Pipoca
S. Paulo - Brazil

[pipoca]

Sorry for the long post.

Thanks "therube" for the MediaInfo tip. After installing and running it on a downloaded video I got the following results:

General
Count : 259
Count of stream of this kind : 1
Kind of stream : General
Stream identifier : 0
Count of video streams : 1
Count of audio streams : 1
Video_Format_List : H.263
Video_Format_WithHint_List : H.263
Codecs Video : Sorenson H263
Audio_Format_List : MPEG Audio
Audio_Format_WithHint_List : MPEG Audio
Audio codecs : MPEG-2 Audio layer 3
File name : get_video_video_id_NJaeHgbho_E.flv
File extension : flv
Format : Flash Video
Format/Url : http://www.macromedia.com/go/getflashplayer
Format/Extensions usually used : flv
Codec : Flash Video
Codec/Url : http://www.macromedia.com/go/getflashplayer
Codec/Extensions usually used : flv
File size : 14380028
Duration : 00:05:49.858
Overall bit rate : 328806
Stream size : 372108
Proportion of this stream : 0.02588

Video
Count : 146
Count of stream of this kind : 1
Kind of stream : Video
Stream identifier : 0
Format : H.263
Codec : Sorenson H263
Duration : 00:05:49.858
Bit rate : 256 Kbps
Width : 320
Height : 180
Pixel aspect ratio : 1.000
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Frame count : 10485
Bits/(Pixel*Frame) : 0.148
Delay : 0
Stream size : 11209056
Proportion of this stream : 0.77949

Audio
Count : 122
Count of stream of this kind : 1
Kind of stream : Audio
Stream identifier : 0
Format : MPEG Audio
Format version : Version 2
Format profile : Layer 3
Codec : MPA2L3
Codec : MPEG-2 Audio layer 3
Duration : 00:05:49.858
Bit rate mode : CBR
Bit rate mode : Constant
Bit rate : 64.0 Kbps
Channel(s) : 1 channel
Sampling rate : 22.05 KHz
SamplingCount : 7714369
Resolution : 16 bits
Delay : 0
Video delay : 0
Video0 delay : 0
Stream size : 2.67 MiB (19%)
Proportion of this stream : 0.19464
Writing library : LAME

Perhaps the information above is useful for the developers.

Thanks again,

Pipoca
S. Paulo - Brazil

[GµårÐïåñ]

Well I noticed that from your agent, so it was tested on the Ubuntu box the last time. Still no issue. I am sorry. Hope you figure it out and let us know when you do, thanks. Maybe Giorgio can give his input but I am not seeing it.

[therube]

What is the link to that clip?
Isn't it possible (isn't it almost certain) that that particular clip is mono.

[GµårÐïåñ]

This is what Giorgio and I have been thinking since the beginning, especially that FlashGot does not modify binary content or encoding, its a parser to oversimplify. With an actual link we can test it. I have been testing with clips at random on the site and so far not noticing a disparity between source and what is downloaded and played. Let's see if the OP can get back to us with some debugging information he is working on so we can try and help.