[FFmpeg-user] HELP !

Peter van Houten petervdh at gmail.com
Tue Aug 23 17:50:24 EEST 2016

On 23/08/2016 12:24, Nicolas Sampson wrote:
> Hello Peter and thank you for the immediate reply.  Yes, that spelling
> error was picked up after I sent the email.  As I stated when I joined
> about 1 hour ago, I am not a programmer, so I would ask you how to run the
> formula you quoted......do I open a cmd window and type the formula in it
> or should I save it a a <.bat> and then run it?  Do I copy the formula or
> batch file into the <ffmpeg\bin> folder?  Sorry but I feel stupid asking
> these questions !!!  Also is the formula set out in one line, and is there
> a 'space' after <-y>
> Thanks again and sorry for the trouble.
> Regards,
> *Nicolas "Sam" Sampson.*
> *If you intend to forward this message, PLEASE delete my address and/or
> details.*

Sorry, can't help if you're using Windows, those commands were for a
Linux shell. Maybe someone else on the list knows the equivalent Windows
commands? The solution I gave is all on one line and yes, there is a
space after the "-y"

Peter van Houten

> On 23 August 2016 at 23:39, Peter van Houten <petervdh at gmail.com> wrote:
>> On 23/08/2016 09:37, Nicolas Sampson wrote:
>>> Greetings to one and all!!!
>>> I am not a programmer but I had to use FFMPEG due to the fact that a lot
>> of
>>> TV Episodes and Documentaries are coded with the HEVC x265 codec, and my
>>> equipment is not to read said files.  I have looked at a number of
>> examples
>>> to try and come up with a 'formula' that satisfies me.
>>> What I am trying to do is: be able to copy a number of files into a
>> folder
>>> and have Ffmpeg convert the first, then loop to the second, etc. etc. and
>>> obviously stop at the last one in the loop.  Is this possible, and how?
>>> This is the current formula I use and I would like to add the loop into
>> it:
>>> ffmpeg -i "xxx.zzz" -c:v lib264 -framerate 25 -crf 21 -c:a libmp3lame
>> -b:a
>>> 190k -b:v 3000k -filter:a "volume=2" "xxx.zzz"
>>> (I am hard of hearing, that is why I doubled the volume)
>>> Is this formula set out correctly? Should the variables be re-arranged
>> from
>>> the order they are in?  Is there anything else I should add to make it
>>> better?
>>> I would greatly appreciate any help and assistance you can render.
>>> Regards,
>>> *​Otto van Dyke.*
>>> *If you intend to forward this message, PLEASE delete my address and/or
>>> details.*
>> This should help you get started. You haven't mentioned your input
>> container but as your input codec is x265, the container is probably mp4
>> so change if necessary. There is a typo in your "lib264", it should be
>> libx264 and I've re-positioned the video bitrate logically:
>> for f in *.mp4; do ffmpeg -i $f -c:v libx264 -b:v 3000k -framerate 25
>> -crf 21 -c:a libmp3lame -b:a 190k -filter:a "volume=2" -y
>> /new_directory/${f%.mp4}.mp4; done
>> --
>> Peter van Houten

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