[FFmpeg-trac] #1808(undetermined:closed): Auto add yadif/format filter when needed
FFmpeg
trac at avcodec.org
Sat Nov 10 11:09:28 CET 2012
#1808: Auto add yadif/format filter when needed
-------------------------------------+-------------------------------------
Reporter: burek | Owner:
Type: enhancement | Status: closed
Priority: wish | Component:
Version: unspecified | undetermined
Keywords: | Resolution: invalid
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
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Changes (by cehoyos):
* status: new => closed
* resolution: => invalid
Comment:
Sorry for not reacting earlier.
I have three comments regarding this issue:
The title asks for automatic insertion of the yadif filter. This would be
a highly welcome feature but I don't see how it could be achieved: Most
DVB streams I know (these are the streams that would profit most from the
feature since in Europe most tv stations still send the live recorded /
sport material interlaced) signal "interlaced" no matter if the content is
actually interlaced or was originally recorded at 24/25fps (movies) and
shows no interlacing artefacts whatsoever.
The original report above claims that an input file could not be read with
"ffmpeg -i file" but could be read with "ffmpeg -i file -vf xxx". This is
simply impossible / would be a very serious bug (but there is no
indication this was the case).
For me it was interesting that a file with a "new", unknown fourcc was
provided as input to ffmpeg - we try hard to support strange formats even
if they appear broken in some way. But this has limits and files produced
with MEncoder by the reporter do not fall into this category imo.
(You can choose any fourcc for any material with both MEncoder and ffmpeg
but that does not make the resulting file useful.)
Please note that MEncoder does not support remuxing the raw input from
tv:// the way you tried, it does support (very well) reencoding v4l input
using lavc or another encoder.
--
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1808#comment:5>
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