[FFmpeg-user] Quicktime - Specify a Movie Header timescale of 24000

[Carl Eugen Hoyos]

2018-03-08 18:21 GMT+01:00, Carl Eugen Hoyos <ceffmpeg at gmail.com>:
> 2018-03-08 17:58 GMT+01:00, Mark Burton <mwjburton at gmail.com>:
>> Thanks. I have managed to compile a usable ffmpeg using brew (I work
>> exclusively on macOS), but I have not figured out how I would be able to
>> edit the libavformat/movenc.h file before compiling using this method. It
>> seems I would need to go down the route, so any help to get that far
>> would
>> be so welcome.
>
> You need a compiler, make and git. Iirc, all three are installed if you
> type something like "gcc -v" on the command line (but I assume they
> are now installed by brew).
>
> $ git clone https://git.ffmpeg.org/ffmpeg.git ffmpeg

An faster equivalent that does not involve git is:
$ curl -O http://ffmpeg.org/releases/ffmpeg-snapshot.tar.bz2
$ tar xf ffmpeg-snapshot-git.tar.bz2

> $ cd ffmpeg
> $ ./configure && make ffmpeg
> This could for example fail if you don't have a new enough yasm or nasm
> binary, in that case please try "./configure --disable-yasm", feel free to
> add "--enable-gpl". If you know hat your cpu has - for example - four
> cores, you can use "make -j4 ffmpeg" to speed up compilation.
>
> This creates a current ffmpeg binary, please test (from the build
> directory) if it allows to reproduce your issue.
> Then edit libavformat/movenc.h and run "make ffmpeg" again to
> get a binary that allows testing if you found the actual issue.
>
> Carl Eugen