[FFmpeg-trac] #1982(swscale:new): Segmentation fault on sws_scale call

FFmpeg trac at avcodec.org
Sat Dec 1 16:17:51 CET 2012

#1982: Segmentation fault on sws_scale call
             Reporter:  goodvinj  |                     Type:  defect
               Status:  new       |                 Priority:  critical
            Component:  swscale   |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
 I use the following code to convert BGRA image to YUV420P, but application
 crashes on sws_scale.
 OS: Linux, Arch: ARMv7

         SwsContext *pImgConvertCtx = sws_getContext(
                 frame->width, frame->height,
                 frame->width, frame->height,
                 SWS_FAST_BILINEAR, NULL, NULL, NULL);
         // Convert RGB to YUV.
         if (pImgConvertCtx)
                 sws_scale(pImgConvertCtx, (const uint8_t * const
 *)frame->data, frame->linesize,
                         0, frame->height, pCurrentPicture->data,

 where "srcFormat" is BGRA, "destFormat" is YUV420P, width is 800, height
 is 1300.

 "pCurrentPicture" allocated via:

         AVFrame * picture = avcodec_alloc_frame();
         if (!picture)
                 return NULL;

         avpicture_alloc((AVPicture *)picture, pix_fmt, nWidth, nHeight);

 "frame" allocated via avpicture_fill from BGRA image data.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1982>
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