[FFmpeg-user] ffmpeg errors

[Noel Hunt]

The recompile fixed the errors, so many thanks to Tom
Evans.

My apologies to Carl Hoyos for wasting his time with what
turned out to be a problem with the compilation of ffmpeg.

Noel Hunt



On Fri, Jun 13, 2014 at 8:14 AM, Noel Hunt <noel.hunt at gmail.com> wrote:

> I realized the errors were in the decoding but I thought maybe
> there were interesting types of packets in the stream that
> ffmpeg couldn't handle. I never imagined it might be compiler
> related.
>
> I am rebuilding ffmpeg now with --cc=gcc46 --as=gcc46. My
> freebsd installation is rather old now,
>
> % uname -a
> FreeBSD beatrice 8.2-RELEASE FreeBSD 8.2-RELEASE #0: Fri Feb 18 02:24:46
> UTC 2011     root at almeida.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC
>  i386
>
> I must have build gcc46 in the past from ports; I couldn't now
> since when I ran portsnap recently the ports system got trashed
> because they are now using bmake instead of make; all the config
> files don't work with make...I am planning to install 10 in fact soon.
>
> Anyway, I'll see how this build goes.
>
> Many thanks.
>
> Noel Hunt
>
>
> On Thu, Jun 12, 2014 at 11:52 PM, Tom Evans <tevans.uk at googlemail.com>
> wrote:
>
>> On Wed, Jun 11, 2014 at 12:36 AM, Noel Hunt <noel.hunt at gmail.com> wrote:
>> > I have been using ffmpeg for a while to re-encode video files
>> > I have received into xvid/mp3 for an old Sony DVD player I
>> > have.
>> >
>> > I have recently tried to convert some files for which ffmpeg
>> > generates tens of thousands of errors, e.g.:
>>
>> The errors are coming from decoding the content in ffmpeg's h264
>> decoder, which uses a lot of asm. I've seen this before with H264
>> files on FreeBSD if you build without modern binutils/compiler.
>>
>> >
>> > + ffmpeg -i /tmp/Endeavour.s02e01.Trove.mp4 -y -vcodec libxvid -acodec
>> > libmp3lame -ab 128  -ac 2 avi/.mp4.avi
>> > ffmpeg version 2.2.3 Copyright (c) 2000-2014 the FFmpeg developers
>> >   built on Jun 11 2014 09:17:30 with gcc 4.2.1 (GCC) 20070719 [FeeBSD]
>> >  configuration: --prefix=/home/noel --enable-libmp3lame --enable-libx264
>> --enable-gpl -- nable-libxvid
>>
>> So you're already building by hand, good.
>>
>> What version/architecture of FreeBSD are you using? Before 10, I had
>> good results building with lang/gcc46 and devel/binutils, for better
>> asm support. After 10, I get good results either with gcc46 (or gcc47)
>> or clang.
>>
>> Pass -cc and --as to configure to use alternate compiler/binutils.
>>
>> Cheers
>>
>> Tom
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>
>