[FFmpeg-devel] A problem in error_resilience.c or h264.c ....

[Hadi Hadizadeh]

Hi,

I use 4 slices per frame for encoding/decoding a CIF video with H.264. To simulate the
channel error, I just droped the second slice in a P-frame. We expect to see the following
s->error_status_table at the end of "ff_er_frame_end" defined in error_resilience.c :

?1?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0 
?0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0 70 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
?1? 0? 0?? 0??? 0??? 0?? 0?? 0?? 0?? 0? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0? 0? 0?? 0??? 0??? 0?? 0?? 0?? 0?? 0? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0? 0? 0?? 0??? 0??? 0?? 0?? 0?? 0?? 0? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0? 0? 0?? 0??? 0??? 0?? 0?? 0?? 0?? 0? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0? 0? 0?? 0??? 0??? 0?? 0?? 0???0? 70??0 ?1?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0? 0? 0?? 0??? 0??? 0?? 0?? 0?? 0?? 0? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0? 0? 0?? 0??? 0??? 0?? 0?? 0?? 0?? 0? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 70
?
?
But interesting is that I see the following map:

?1?? 0 ? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0? ?0?? 0?? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0?
?0?? 0 ? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0? ?0?? 0?? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0
?0?? 0 ? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0? ?0?? 0?? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0
?0?? 0 ? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0? ?0?? 0?? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0
?0?? 0 ? 0 ? 0? ?0? ?0? ?0? ?0 ? 0?? 0 70 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
? F? E?7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
7F 7F 7F 7F 7F 7F 7F 7F 7F 7F7F? 1?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0?? 0
?0?? 0 ? 0? ?0 ? 0 ? 0 ? 0 ? 0 ? 0 ? 0??0 ? 0? ?0?? 0?? 0? ?0???E???E???E???E?? E
?E? E?? E? E?? E? E? E?? E?? E? E? E? E? E?? E?? E? E? E?? E?? E??? E?? E
?E 7F 7F 7F 7F 7F 7F 7F 7F 7F7F 7F 7F 7F 7F 7F 7F 7F 7F 7F 7F
?
In other words, I dropped the second slice but the thirds slice and also
some portiontion of the 4th slice is lost!! But what is the problem? Thanks.