I have a DVD, if I play the
.VOB file directly in VLC, with the option
automatic set for deinterlace. Then the picture looks smooth. However, if I convert that
.VOB to a
ffmpeg -i out.vob converted.mp4
Then when I view the mp4 in VLC, by default, it looks like it's not interlaced and there are awful horizontal lines everywhere. If I change the option for deinterlace in VLC to
on then the picture looks smooth...
It appears that some how when I am converting this, the interlacing is getting flipped or something? Because for whatever reason with VLC's
automatic option, it seems to think a video that requires interlacing doesn't actually require it. Whereas with the
.VOB it detected everything properly.
When I look at the
.VOB metadata, I see:
Input #0, mpeg, from 'out.vob': Duration: 00:46:58.69, start: 3697.324300, bitrate: 6093 kb/s Stream #0:0[0x80]: Audio: ac3, 48000 Hz, stereo, fltp, 192 kb/s Stream #0:1[0x1e0]: Video: mpeg2video (Main), yuv420p(tv, smpte170m, bottom first), 720x480 [SAR 8:9 DAR 4:3], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
And the metadata for the converted file:
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'converted.mp4': Metadata: major_brand : isom minor_version : 512 compatible_brands: isomiso2avc1mp41 encoder : Lavf58.76.100 Duration: 00:46:58.82, start: 0.000000, bitrate: 1710 kb/s Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, smpte170m), 720x480 [SAR 8:9 DAR 4:3], 1573 kb/s, 29.97 fps, 29.97 tbr, 30k tbn, 59.94 tbc (default) Metadata: handler_name : VideoHandler vendor_id :  Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 128 kb/s (default) Metadata: handler_name : SoundHandler vendor_id : 
Is there some flag I should be setting when doing the conversion to preserve interlaced info?