YouTube, MP4 and FFMPEG

[Bret Busby]

On 25/02/2016, Amichai Rotman <amichai at iglu.org.il> wrote:
> Hi all,
>
> I am trying to use 'youtube-dl' (and other) converters to download a
> specific YouTube video [1]. i want to show it in a lecture and i do not
> trust the availability of an Internet connection over there.
>
> I tried using different methods and managers - but the result is the same -
> an MP4 file without any sound. It seems that after downloading the streams
> separately, FFMPEG is used to join them to an MP4 file. I guess this is the
> failing point...
>
> I even tried online services to do the same, with same results.
>
> Just to make sure, I asked a friend of mine to ty it on Windows and it
> worked for him. He said he hears the sound, but when i try to play it on my
> Ubuntu 14.04 machines - *no sound!*
>
> I have no problems playing other MP4 files...
>
> Can any of you shed a light on this for me? What am i missing?
>
> Thanks!
>
> Amichai.
>

What media player are you using?

Have you tried vlc?

Some videos, I can not download from youtube, with youtube-dl, but the
ones that I can download, I can view and hear, with using vlc as the
media player.

-- 

Bret Busby
Armadale
West Australia

..............

"So once you do know what the question actually is,
 you'll know what the answer means."
- Deep Thought,
 Chapter 28 of Book 1 of
 "The Hitchhiker's Guide to the Galaxy:
 A Trilogy In Four Parts",
 written by Douglas Adams,
 published by Pan Books, 1992

....................................................