[FFmpeg-devel] [PATCH] avcodec/mjpegenc: remove non mod 16 check, theres a amv file that is not mod 16 == 0

[wm4]

On Mon, 24 Aug 2015 20:18:59 +0200
Michael Niedermayer <michaelni at gmx.at> wrote:

> From: Michael Niedermayer <michael at niedermayer.cc>
> 
> See Ticket 4770
> 
> Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> ---
>  libavcodec/mjpegenc.c |    9 ---------
>  1 file changed, 9 deletions(-)
> 
> diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c
> index ee0b16e..ae0c8cb 100644
> --- a/libavcodec/mjpegenc.c
> +++ b/libavcodec/mjpegenc.c
> @@ -228,15 +228,6 @@ static int amv_encode_picture(AVCodecContext *avctx, AVPacket *pkt,
>      if(s->avctx->flags & CODEC_FLAG_EMU_EDGE)
>          return AVERROR(EINVAL);
>  
> -    if ((avctx->height & 15) && avctx->strict_std_compliance > FF_COMPLIANCE_UNOFFICIAL) {
> -        av_log(avctx, AV_LOG_ERROR,
> -               "Heights which are not a multiple of 16 might fail with some decoders, "
> -               "use vstrict=-1 / -strict -1 to use %d anyway.\n", avctx->height);
> -        av_log(avctx, AV_LOG_WARNING, "If you have a device that plays AMV videos, please test if videos "
> -               "with such heights work with it and report your findings to ffmpeg-devel at ffmpeg.org\n");
> -        return AVERROR_EXPERIMENTAL;
> -    }
> -
>      pic = av_frame_clone(pic_arg);
>      if (!pic)
>          return AVERROR(ENOMEM);

I don't quite understand why decoding an AMV file (whatever that is)
requires a change in the mjpeg encoder?