[Libav-user] ffmpeg 3.4.5 mpeg4 disappearing encoders

Jeremy . freewheel at hotmail.com
Thu Jan 23 19:32:59 EET 2020

Thanks Carl - can you advise on where I can obtain release support? I figured this was the only list for libavcodec, is there another?
From: Libav-user <libav-user-bounces at ffmpeg.org> on behalf of Carl Eugen Hoyos <ceffmpeg at gmail.com>
Sent: 23 January 2020 17:03
To: This list is about using libavcodec, libavformat, libavutil, libavdevice and libavfilter. <libav-user at ffmpeg.org>
Subject: Re: [Libav-user] ffmpeg 3.4.5 mpeg4 disappearing encoders

Am Do., 23. Jan. 2020 um 17:25 Uhr schrieb Jeremy . <freewheel at hotmail.com>:

> I've been using 3.4.2 ffmpeg for a while, successfully encoding video to mpeg4.
> I've just upgraded to 3.4.5 and, despite building ffmpeg (Windows, msvc2017
> toolchain, MinGW) with exactly the same configure options, mpeg4 and 18
> other encoders seem to have disappeared.

For future questions: Remember that there is very little release support here
in general, none for Windows, and none for outdated releases.

> For reference, my configure options are:
> --toolchain=msvc --target-os=win64 --arch=x86_64 --prefix=../ffmpegbuilds --enable-shared --enable-libx264 --cpu=i686 --extra-cflags=-I../x264builds/include --extra-ldflags='-LIBPATH:../x264builds/lib' --disable-error-resilience

You are right that --disable-error-resilience disables several codecs but
this is also true for older versions including 3.4.2.

Carl Eugen
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