- libavcodec issue
- some decoders alter AVCodecContext width/height values, in a wrong way
- eg. in issue 2815, vp6f decoder changes these values, resulting in distorted / invalid frames
- this patch forces default AVCodecContext values
if( AVMEDIA_TYPE_VIDEO == enc->codec_type && video_stream < 0)
{
+ // backup encoder' width/height
+ int enc_width = enc->width;
+ int enc_height = enc->height;
+
AVCodec *codec = avcodec_find_decoder(enc->codec_id);
if (!codec ||
#if LIBAVCODEC_VERSION_INT >= ((53<<16)+(8<<8)+0)
< 0)
goto exit_func;
+ // checking width/height (since decoder can sometimes alter it, eg. vp6f)
+ if (enc_width && (enc->width != enc_width)) { enc->width = enc_width; }
+ if (enc_height && (enc->height != enc_height)) { enc->height = enc_height; }
+
video_stream = i;
video_st = ic->streams[i];
picture = avcodec_alloc_frame();