id,summary,reporter,owner,description,type,status,priority,component,version,resolution,keywords,cc,blockedby,blocking,reproduced,analyzed
961,Decoding H.264 to YUV drops one frame,takis,,"For the attached samples encoded with x264, FFmpeg drops one frame when decoding them to YUV420.

I used the reference decoder (JM 17.2) to verify that the bitstream indeed did contain one more frame than FFmpeg decoded.

./ldecod.dbg.exe -i output3.h264
Setting Default Parameters...
Parsing Configfile decoder.cfg
...............

----------------------------- JM 17.2 (FRExt) -----------------------------
--------------------------------------------------------------------------
 Input H.264 bitstream                  : /tmp/output3.h264 
 Output decoded YUV                     : test_dec.yuv 
 Input reference file                   : test_rec.yuv 
--------------------------------------------------------------------------
POC must = frame# or field# for SNRs to be correct
--------------------------------------------------------------------------
  Frame          POC  Pic#   QP    SnrY     SnrU     SnrV   Y:U:V Time(ms)
--------------------------------------------------------------------------
 Input reference file                   : test_rec.yuv does not exist 
                                          SNR values are not available
(fn=0  T: poc=0  B: poc=0  F: poc=0  G: poc=0)  ref (3) view_id (0) 
00000(IDR)        0     0    28                             4:2:0      86
(fn=0  T: poc=0  B: poc=0  F: poc=0  G: poc=0)  ref (3) view_id (0) 
(fn=1  T: poc=4  B: poc=4  F: poc=4  G: poc=4)  ref (3) view_id (0) 
00002( P )        4     1    28                             4:2:0      13
(fn=0  T: poc=0  B: poc=0  F: poc=0  G: poc=0)  ref (3) view_id (0) 
(fn=1  T: poc=4  B: poc=4  F: poc=4  G: poc=4)  ref (3) view_id (0) 
(fn=2  T: poc=2  B: poc=2  F: poc=2  G: poc=2)  
00001( b )        2     2    28                             4:2:0      10
-------------------- Average SNR all frames ------------------------------
 SNR Y(dB)           :  0.00
 SNR U(dB)           :  0.00
 SNR V(dB)           :  0.00
 Total decoding time : 0.111 sec (27.027 fps)[3 frm/111 ms]
--------------------------------------------------------------------------
 Exit JM 17 (FRExt) decoder, ver 17.2 
 Output status file                     : log.dec 





pissaris@takis-Latitude-E6520:/usr/local/src/jm-17.2/bin$ ffmpeg -y -i /tmp/output3.h264  test.yuv
ffmpeg version N-37401-g151ecc2 Copyright (c) 2000-2012 the FFmpeg developers
  built on Jan 31 2012 15:39:01 with clang 3.0 (tags/RELEASE_30/final)
  configuration: --cc=/opt/clang/bin/clang
  libavutil      51. 36.100 / 51. 36.100
  libavcodec     54.  0.102 / 54.  0.102
  libavformat    54.  0.100 / 54.  0.100
  libavdevice    53.  4.100 / 53.  4.100
  libavfilter     2. 60.100 /  2. 60.100
  libswscale      2.  1.100 /  2.  1.100
  libswresample   0.  6.100 /  0.  6.100
[h264 @ 0x29c83a0] decoding for stream 0 failed
[h264 @ 0x29c83a0] Estimating duration from bitrate, this may be inaccurate
Input #0, h264, from '/tmp/output3.h264':
  Duration: N/A, bitrate: N/A
    Stream #0:0: Video: h264 (High), yuv420p, 352x288, 25 fps, 25 tbr, 1200k tbn, 50 tbc
[buffer @ 0x29d08e0] w:352 h:288 pixfmt:yuv420p tb:1/1000000 sar:0/1 sws_param:
Output #0, rawvideo, to 'test.yuv':
  Metadata:
    encoder         : Lavf54.0.100
    Stream #0:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 352x288, q=2-31, 200 kb/s, 90k tbn, 25 tbc
Stream mapping:
  Stream #0:0 -> #0:0 (h264 -> rawvideo)
Press [q] to stop, [?] for help
frame=    2 fps=  0 q=0.0 Lsize=     297kB time=00:00:00.08 bitrate=30412.8kbits/s dup=0 drop=1    
video:297kB audio:0kB global headers:0kB muxing overhead 0.000000%
",defect,closed,normal,avcodec,git-master,fixed,h264,,,,0,0