avfilter/vf_idet: Fixing idet for single-frame inputs.
Handle single frame inputs similar to yadif (e.g., https://github.com/FFmpeg/FFmpeg/commit/
0f9f24c9cfd291c7ece4d3bad64fdf06d107168a and https://github.com/FFmpeg/FFmpeg/commit/
681e008d06d2241d50abe6316c908a184ddc5942)
Example:
ffmpeg -r 1 -t 1 -i fate-suite/ffmpeg-synthetic/vsynth1/%02d.pgm -vf idet,showinfo -f null -y /dev/null
Previously:
Output file is empty, nothing was encoded (check -ss / -t / -frames parameters if used)
[Parsed_idet_0 @ 0x36389d0] Repeated Fields: Neither: 0 Top: 0 Bottom: 0
After patch:
[Parsed_showinfo_1 @ 0x1909810] n:0 pts:0 pts_time:0 pos:-1 fmt:gray sar:0/1 s:352x432 ...
[Parsed_idet_0 @ 0x18f9bb0] Repeated Fields: Neither: 1 Top: 0 Bottom: 0
Fate looks good.
Signed-off-by: Neil Birkbeck <neil.birkbeck@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>