[FFmpeg-devel] Regression problem

JULIAN GARDNER joolzg at btinternet.com
Tue Sep 23 13:37:06 CEST 2014


----- Original Message -----
> From: Michael Niedermayer <michaelni at gmx.at>
> To: FFmpeg development discussions and patches <ffmpeg-devel at ffmpeg.org>
> Cc: 
> Sent: Tuesday, 23 September 2014, 12:24
> Subject: Re: [FFmpeg-devel] Regression problem
> 
> On Tue, Sep 23, 2014 at 09:27:57AM +0100, JULIAN GARDNER wrote:
>>  I seem to be having problems using the ff_load_image routine, with a git 
> pulled build from the beginning of the week, which used to work but is now 
> giving me "failed to decode image file", and this is on a png that has 
> been in use for over a year,
>> 
>>  The code is is based on VSRC_TESTSRC with an addition call to this code
>> 
>>  static int load_image(uint8_t **image_data, int *w, int *h, int *stride,
>>                       const char *filename, void *log_ctx)
>>  {
>>      int ret;
>>      enum AVPixelFormat pix_fmt;
>>      uint8_t *src_data[4], *dst_data[4];
>>      int src_linesize[4], dst_linesize[4];
>> 
>>      av_log( NULL, AV_LOG_WARNING, "load_image %s\n", 
> filename);
>> 
>>      /* load image from file */
>>      if ((ret = ff_load_image(src_data, src_linesize, w, h, &pix_fmt, 
> filename, log_ctx)) < 0)
>>          return ret;
>> 
>>      if ((ret = ff_scale_image(dst_data, dst_linesize, *w, *h, PIXEL_FORMAT,
>>                                src_data, src_linesize, *w, *h, pix_fmt,
>>                                log_ctx)) < 0)
>>          goto end;
>> 
>>      *stride = dst_linesize[0];
>> 
>>      /* copy image_data to a newly allocated array */
>>      *image_data = av_malloc(*stride * *h);
>>      if (!*image_data)
>>          ret = AVERROR(ENOMEM);
>>      av_image_copy_plane(*image_data, *stride, dst_data[0], dst_linesize[0], 
> *w*4, *h);
>>  end:
>>      av_free(src_data[0]);
>>      av_free(dst_data[0]);
>> 
>>      return ret;
>>  }
>> 
>> 
>>  This used to work but now as I have said give the error message about not 
> being able to decode
>> 
>>  There is nothing in the log, even with  as "-loglevel debug"
>> 
>>  load_image /home/encoder/images/Logo640x360.png
>>  [AVIOContext @ 0x7fdcf8002580] Statistics: 3713 bytes read, 0 seeks
>>  [libx264 @ 0x2c63320] frame= 322 QP=12.00 NAL=2 Slice:P Poc:144 I:15   
> P:524  SKIP:381  size=14355 bytes
>>  [Parsed_osd_0 @ 0x2c3b200] Failed to decode image from file
>>  [Parsed_osd_0 @ 0x2c3b200] Error loading image file 
> '/home/encoder/images/Logo640x360.png'
> 
> how can this be reproduced ?
> can you share the png file ?
> 

It happens with any png, i just created a simple 100x100 png in gimp and this also fails

joolz



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