[FFmpeg-user] ntsc-dvd doesn't default to interlaced.

[Andy Furniss]

Carl Eugen Hoyos wrote:
> Andy Furniss <adf.lists <at> gmail.com> writes:
>
>> One wierd thing is that I got that from a post ages
>> ago and it had an extra argument -
>>
>> -vf scale=720:576:interl=1,fieldorder=tff
>>
>> now whether I use tff or bff it has the effect of
>> trashing the chroma, which may not be instantly
>> obvious depending on content.
>
> This sounds (very) important, please add command line
> and complete, uncut console output so I can test.
>
> Thank you, Carl Eugen

Apologies for the indirect link, I changed ISP and don't have webspace 
anymore - but if you want the source (only 14 meg) it's here -

http://www.filedropper.com/h264-1080i

There is a fast pan past some hoardings that shows the issue well with 
mplayer -vf yadif=1.


ffmpeg -i h264-1080i.ts -an -sn -vf 
scale=720:576:interl=1,fieldorder=tff -vcodec mpeg2video -flags 
+ildct+ilme -target pal-dvd -aspect 16:9 -b:v 8000k tff.mpg
ffmpeg version N-54994-gedab63a Copyright (c) 2000-2013 the FFmpeg 
developers
   built on Jul 28 2013 10:41:25 with gcc 4.6.3 (GCC for Cross-LFS 
4.6.3.20121105)
   configuration: --prefix=/usr --enable-gpl --enable-libx264 
--enable-x11grab
   libavutil      52. 40.100 / 52. 40.100
   libavcodec     55. 19.100 / 55. 19.100
   libavformat    55. 12.102 / 55. 12.102
   libavdevice    55.  3.100 / 55.  3.100
   libavfilter     3. 81.103 /  3. 81.103
   libswscale      2.  4.100 /  2.  4.100
   libswresample   0. 17.103 /  0. 17.103
   libpostproc    52.  3.100 / 52.  3.100
[h264 @ 0x26b82e0] mmco: unref short failure
     Last message repeated 2 times
[NULL @ 0x26bc260] start time is not set in estimate_timings_from_pts
[mpegts @ 0x2695b60] PES packet size mismatch
     Last message repeated 1 times
[mpegts @ 0x2695b60] Could not find codec parameters for stream 4 
(Unknown: none ([5][0][0][0] / 0x0005)): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' 
options
Input #0, mpegts, from 'h264-1080i.ts':
   Duration: 00:00:16.56, start: 44603.868144, bitrate: 7177 kb/s
   Program 17472
   Program 17540
     Stream #0:0[0x19c9]: Video: h264 (High) ([27][0][0][0] / 0x001B), 
yuv420p, 1920x1080 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
     Stream #0:1[0x19ca](eng): Audio: aac_latm ([17][0][0][0] / 0x0011), 
48000 Hz, stereo, fltp
     Stream #0:2[0x19ce](eng): Audio: aac_latm ([17][0][0][0] / 0x0011), 
48000 Hz, stereo, fltp (visual impaired)
     Stream #0:3[0x19cd](eng): Subtitle: dvb_subtitle ([6][0][0][0] / 
0x0006)
     Stream #0:4[0x19fa]: Unknown: none ([5][0][0][0] / 0x0005)
   Program 17603
   Program 17664
   Program 19648
   Program 20288
Output #0, dvd, to 'tff.mpg':
   Metadata:
     encoder         : Lavf55.12.102
     Stream #0:0: Video: mpeg2video, yuv420p, 720x576 [SAR 64:45 DAR 
16:9], q=2-31, 8000 kb/s, 90k tbn, 25 tbc
Stream mapping:
   Stream #0:0 -> #0:0 (h264 -> mpeg2video)
Press [q] to stop, [?] for help
[h264 @ 0x2824660] mmco: unref short failure
     Last message repeated 1 times
[h264 @ 0x27df940] mmco: unref short failure
[h264 @ 0x2892fc0] error while decoding MB 71 6, bytestream 
(-34)e=8144.7kbits/s
[h264 @ 0x2892fc0] concealing 7418 DC, 7418 AC, 7418 MV errors in I frame
frame=  385 fps= 57 q=2.0 Lsize=   15040kB time=00:00:15.36 
bitrate=8021.3kbits/s dup=7 drop=0
video:14788kB audio:0kB subtitle:0 global headers:0kB muxing overhead 
1.703735%