[FFmpeg-user] VOB error

[Benoit]

Hi!

I wrote:
> Goal
> ----
> I've saved a VOB file from a DVD. It contains a VHS rip made by a
> "conversion professional".

> I'd like to convert it and make some cutting.

> ffplay
> ------
> ffplay refuses to read it:
> $ ffplay VTS_01_1.VOB
> [...]
> VTS_01_1.VOB: Invalid data found when processing input

> I forced it:
> $ ffplay -f mpegvideo VTS_01_1.VOB

> I get a lot of error on console:
> [...]
> [mpeg2video @ 0x18d4010]invalid cbp at 21 11
> [mpeg2video @ 0x18d4010]concealing 550 DC, 550 AC, 550 MV errors
>  736.21 A-V:  0.000 s:0.0 aq=    0KB vq=   12KB sq=    0B f=12/638   
> [...]

> Display is split in 2 parts, with some small portions of image.

Carl suggested me to flag with "-f mpeg" instead of "-f mpegvideo".

Display is still splitted in 2 parts, but sound is good and each
image is good. Like when I open it with avidemux.

To be more precise, I have 2 full images side by side, horizontally.

> ffmpeg
> ------
$ ffmpeg -f mpeg -i VTS_01_1.VOB
[...]
[mpeg @ 0x22286b0]max_analyze_duration reached
Input #0, mpeg, from 'VTS_01_1.VOB':
  Duration: 00:01:33.17, start: 0.222222, bitrate: 35725 kb/s
    Stream #0.0[0x1e0]: Video: mpeg2video, yuv420p, 720x576 [PAR 16:15 DAR 4:3], 2713 kb/s, 25 fps, 25 tbr, 90k tbn, 50 tbc
    Stream #0.1[0x20]: Subtitle: dvdsub
    Stream #0.2[0x80]: Audio: ac3, 48000 Hz, stereo, s16, 224 kb/s
At least one output file must be specified

More encouraging. But I don't understand the splitted image.
Could it be linked with interlacing? (video was grabbed from a vhs)

Thanks,
Benoit