[mythtv-users] Downscale HD recordings with ffmpeg

[kanetse@gmail.com]

On Mon, Mar 16, 2009 at 3:13 AM, belcampo <belcampo at zonnet.nl> wrote:
>
> My goal is "visibly the same quality" and "light on file-size".
>
> I use this:
>
> ffmpeg -i source.mpg -vcodec libx264 -b 2772k -flags +loop -coder 1 -refs 2
> -deblockalpha 0 -deblockbeta 0 -partitions +parti4x4 -partitions +partp8x8
> -partitions +partb8x8 -partitions +parti8x8 -me_method umh -subq 7 -me_range
> 24 -cmp +chroma -bf 0 -b_strategy 1 -g 250 -keyint_min 25 -sc_threshold 40
> -maxrate 4500k -r 25 -qmin 16 -qmax 32 -s 896x720 -aspect 16:9 -acodec
> libfaac -ab 192k -ar 48000 -ac 6 -f mpegts result.ts
>
> ffmpeg doesn't produce 100% mpegts files, they don't play on an PopCornHour
> STB, I have to remux with tsMuxeR to get it 100%.
>

I've been following this thread, it has been extremely useful as I am
looking for a way to perform x264 encodings.  When I tried the command
above on one of my recordings, the audio was extremely low pitched
(although it was appeared to be at the right speed).  It was basically
inaudable.  Also periodically, the video seems to pause for minutes at
a time.  This is on a 1080i recorded program.

Any ideas on what I might have done wrong?

Thanks!