Requests For Features

[Peter S Kirk]

On 26 Sep 2015 at 17:07, Budgie Budgie <ajebay at errichel.co.uk> wrote:

> Had a few moments to sort out my flv downloads.  There are quite a few, 
> all with long complex titles with meaningless reference numbers which 
> make them difficult to type without error so I tried a wee batch file 
> based on your advice to run in the directory with all the flv files as 
> follows:-
> 
> for file in *.flv ; do ffmpeg -i $file -c copy -f mp4 ${file%.flv}.mp4 ; 
> done
> 
> This seems to work OK but if you can suggest improvements please do. 
> Meanwhile I have a couple of naive questions:-
> 
> The mp4 files are all about 3 MiB smaller (in 1.0 GiB). Why is that?

Different containers store different meta data in different ways. Use the 
same command to convert an mkv to mp4 and the mp4 is larger.

> 
> When running the script I get the following comments for each file 
> converted:-
> 
> [mp4 @ 0x22d38e0] Codec for stream 0 does not use global headers but 
> container format requires global headers
> [mp4 @ 0x22d38e0] Codec for stream 1 does not use global headers but 
> container format requires global headers
> 
> This omission does not appear fatal but what is going on?

A quick google shows: https://trac.ffmpeg.org/ticket/3142
 
> BTW Thanks again for all your help.
> Regards,
> Budge