[MEncoder-users] h264 (and help with encoding) or divx
Brian Penick
bydivinerite at gmail.com
Sat Mar 8 12:39:30 CET 2008
I wouldn't worry too much about the reported aspect ratio, pretty sure the
264 codecs don't have support for ratios other than 1:1. So if you encode
at 704:576 then that's most likely what you'll see. Also I see it echo out
the -nosound option for the first pass, using that can sometimes cause audio
syncing issues. If you are still having trouble you can try -lavc audio.
It also handles aac but the options are a little different.
On Fri, Mar 7, 2008 at 7:17 PM, Alex Samad <alex at samad.com.au> wrote:
> On Sat, Mar 08, 2008 at 12:03:18PM +1100, Alex Samad wrote:
> > On Fri, Mar 07, 2008 at 01:43:18PM -0600, Brian Penick wrote:
> > > Sorry, the nob_pyramid. won't help with the blocking, only the
> choppiness.
> > > The cpu in the xbox isn't fast enough to handle the b_pyramid option
> because
> > > it requires extra decoding time due to the fact that it allows
> b-frames to
> > > be predicted off of other b-frames. The problem is that the reference
> > > b-frames also have to be predicted from a P or I frame. So it results
> in
> > > extra decoding time before a frame can be displayed. As far as the
> blocking
> > > is concerned try taking out the 8x8dct option and setting
> partitions=all
> > > (this option dependent on how new your mencoder version is). You
> could try
> > > using the pp deblocking video filters before encoding. Also I believe
> crf
> > > was designed for single pass video encoding which negates all of your
> qp
> > > settings the x264 codec will ignore them for crf. Pretty sure you
> have to
> > > set a bitrate for multipass encoding. Lastly I think setting qpmax to
> 51
> > > might result in some bad quality still frames because it'll pull the
> bitrate
> > > to motion scenes try setting it to 31.
> > Okay will have a look at that.
> >
> > This might also explain why when I play my mp4 files on QT viewer on a
> > dual intel it goes all choppy (when played with m$ media player its okay
> > - using other codecs though.
> I ran a quick test with no_b_pyramid and the choppiness of the video has
> disappeared, video plays fine now the aac seems to be giving it
> problems, I am going to try object_type=2 and see if that helps. the
> next step I guess is to move to mp3.
>
> Still having playing problems on the xbox though
>
>
> >
> > So I am going to try removing the pyramid stuff first see how that goes,
> > remove the crf as well and replace with a bitrate for pass 1.
> >
> > try out 8x8dct & pp in a different session
> >
> > I will check out the qpmax once I have done the above
> >
> > Also when i look at my .mp4 file with MP4Box -info i get this
> >
> > MP4Box -info 20080305114201-MOV023-brames.mp4
> > * Movie Info *
> > Timescale 600 - Duration 00:00:17.520
> > Fragmented File no - 2 track(s)
> > File Brand isom - version 1
> > Created: GMT Wed Mar 5 00:46:06 2008
> >
> > File has root IOD
> > Scene PL 0xff - Graphics PL 0xff - OD PL 0xff
> > Visual PL: AVC/H264 Profile (0x15)
> > Audio PL: High Quality Audio Profile @ Level 2 (0x0f)
> > No streams included in root OD
> >
> > Track # 1 Info - TrackID 1 - TimeScale 25000 - Duration 00:00:17.520
> > Media Info: Language "Undetermined" - Type "vide:avc1" - 438 samples
> > MPEG-4 Config: Visual Stream - ObjectTypeIndication 0x21
> > AVC/H264 Video - Visual Size 704 x 576 - Profile High @ Level 5.1
> > NAL Unit length bits: 32
> > Pixel Aspect Ratio 16:11 - Indicated track size 1024 x 576
> > Self-synchronized
> >
> > Track # 2 Info - TrackID 2 - TimeScale 48000 - Duration 00:00:17.386
> > Media Info: Language "Undetermined" - Type "soun:mp4a" - 815 samples
> > MPEG-4 Config: Audio Stream - ObjectTypeIndication 0x40
> > MPEG-4 Audio AAC Main - 2 Channel(s) - SampleRate 48000
> > Synchronized on stream 1
> >
> >
> > The thing that has me worried (i think) is the
> > Pixel Aspect Ratio 16:11 - Indicated track size 1024 x 576
> >
> > how do I change this to stick to wide screen 704x576 ?
> >
> > Thanks
> > Alex
> >
> > >
> > > On Fri, Mar 7, 2008 at 12:58 AM, Alex Samad <alex at samad.com.au> wrote:
> > >
> > > > On Wed, Mar 05, 2008 at 07:14:29PM -0600, Brian Penick wrote:
> > > > > I suggest changing b_pyramid to nob_pyramid, subq=7 to subq=6 (you
> > > > shouldn't
> > > > > notice a drop in quality at all but it will speed up the encode),
> and
> > > > > frameref=4 to frameref=2. Optionally you could increase the
> b_bias to
> > > > 20
> > > > > (b_bias=20) to favor bframes a little more since b_adapt still
> strongly
> > > > > favors P frames even when the image is totally still. But I'm
> pretty
> > > > sure
> > > > > your biggest issue here is the b_pyramid option.
> > > > Hi
> > > >
> > > > Is there a simple way of explaing why this option is giving me the
> > > > blockiness. The mn pages in mencoder only talk about referencing
> > > > B-Frames
> > > >
> > > > Thanks
> > > >
> > > > >
> > > > > On Tue, Mar 4, 2008 at 6:36 PM, Alex Samad <alex at samad.com.au>
> wrote:
> > > > >
> > > > > > Hi
> > > > > >
> > > > > > I am in the process of processing my video camera footage I have
> > > > taken.
> > > > > >
> > > > > > I was hoping to go to h264, but testing the resultant files on
> my xbox
> > > > > > (xbmc), it is very choppy, it can't seem to keep up (also
> encoding
> > > > sound
> > > > > > to aac). So I am thinking to either go back to encoding with
> divx or
> > > > > > buy an xbox360 ?
> > > > > >
> > > > > > I would like to stay with h264 it saves a lot of space.
> > > > > >
> > > > > > My other problem with x264 is I get boxy area's when the back
> ground
> > > > is
> > > > > > a wall, with a visible light gradient (you can see it get darker
> the
> > > > > > further away it is). This looks okay in the original format,
> but when
> > > > > > encoded with x264 it goes all blocky and not smooth at all
> > > > > >
> > > > > > these are the flags I am using
> > > > > >
> > > > > >
> > > >
> H264COMMON=":frameref=4:mixed_refs:bframes=16:b_adapt:b_pyramid:weight_b:bime:direct_pred=auto:me=umh:me_range=24:subq=7:brdo:chroma_me:trellis=1:cabac:deblock:8x8dct:partitions=p8x8,b8x8,i8x8,i4x4:nofast_pskip:nodct_decimate:threads=auto:keyint=250:qp_min=10:qp_max=51:ip_factor=
> > > > > > 1.4:pb_factor=1.3:qcomp=0.6:qblur=0.5:chroma_qp_offset=0"
> > > > > >
> > > > > > ENC1="x264 -x264encopts pass=1:crf=18:turbo$H264COMMON"
> > > > > > ENC2="x264 -x264encopts pass=3:bitrate=$BITRATE$H264COMMON"
> > > > > >
> > > > > > AENC="-af volnorm=1"
> > > > > >
> > > > > > FILTER1=""
> > > > > >
> > > > > > FILTER2="-vf spp,hqdn3d=2:1:2"
> > > > > >
> > > > > > AUDIO="-oac faac -faacopts object=1:tns:quality=300:mpeg=4"
> > > > > >
> > > > > > ASPECT="-aspect 16:9"
> > > > > >
> > > > > > ADDOPT=
> > > > > >
> > > > > >
> > > > > > echo "Video Pass 1/3"
> > > > > > nice mencoder $QUIET \
> > > > > > $ASPECT \
> > > > > > -alang en\
> > > > > > $FILTER1 \
> > > > > > -ovc $ENC1 \
> > > > > > -nosound \
> > > > > > -passlogfile "$PASSLOG" \
> > > > > > -o /dev/null \
> > > > > > "$INFILE" $ADDOPT
> > > > > >
> > > > > > echo "Video & Audio Pass 2/3"
> > > > > > nice mencoder $QUIET \
> > > > > > $ASPECT \
> > > > > > -alang en\
> > > > > > $FILTER2 \
> > > > > > $AENC \
> > > > > > -ovc $ENC2 \
> > > > > > -passlogfile "$PASSLOG" \
> > > > > > $AUDIO \
> > > > > > -o "$AVIFILE" \
> > > > > > "$INFILE" $ADDOPT
> > > > > >
> > > > > > echo "Video & Audio Pass 3/3"
> > > > > > nice mencoder $QUIET \
> > > > > > $ASPECT \
> > > > > > -alang en\
> > > > > > $FILTER2 \
> > > > > > $AENC \
> > > > > > -ovc $ENC2 \
> > > > > > -passlogfile "$PASSLOG" \
> > > > > > $AUDIO \
> > > > > > -o "$AVIFILE" \
> > > > > > "$INFILE" $ADDOPT
> > > > > >
> > > > > >
> > > > > > echo "Extract Video"
> > > > > > nice MP4Box -aviraw video "$AVIFILE" >
> "$WRKDIR/aviraw_video.out" &
> > > > > > WAITPD="$!"
> > > > > >
> > > > > > # Extracts to ${BFILE}_audio.raw
> > > > > > echo "Extract Audio"
> > > > > > nice MP4Box -aviraw audio "$AVIFILE" >
> "$WRKDIR/aviraw_audio.out" &
> > > > > > WAITPD="$WAITPD $!"
> > > > > >
> > > > > > wait $WAITPD
> > > > > >
> > > > > > mv $SNDFILERAW $SNDFILEAAC
> > > > > >
> > > > > > echo "Make mp4"
> > > > > > MP4Box -add "$VIDFILERAW" -add "$SNDFILEAAC" -fps 25 -new
> > > > > > "${OUTFILE}" > "$WRKDIR/MP4Box.out"
> > > > > >
> > > > > >
> > > > > >
> > > > > > What can I do to smooth out these ares with out loosing too much
> > > > > > definition in the for ground.
> > > > > >
> > > > > > Also how can I use mplayer (or mencoder) to output to a jpg a
> specific
> > > > > > frame (or time reference) so I can give examples
> > > > > >
> > > > > > Thanks
> > > > > >
> > > > > >
> > > > > > -
> > > > > > "The march to war affected the people's confidence. It's hard to
> make
> > > > > > investment. See, if you're a small business owner or a large
> business
> > > > owner
> > > > > > and you're thinking about investing, you've got to be optimistic
> when
> > > > you
> > > > > > invest. Except when you're marching to war, it's not a very
> optimistic
> > > > > > thought, is it? In other words, it's the opposite of optimistic
> when
> > > > you're
> > > > > > thinking you're going to war."
> > > > > >
> > > > > > - George W. Bush
> > > > > > 02/09/2004
> > > > > > Springfield, MO
> > > > > >
> > > > > > -----BEGIN PGP SIGNATURE-----
> > > > > > Version: GnuPG v1.4.6 (GNU/Linux)
> > > > > >
> > > > > > iD8DBQFHzesikZz88chpJ2MRAhU5AJ99LTsMw5u5h1rLN/fiMV2yaas8jQCgtizW
> > > > > > u3KheaAME+oLkJSZn0i11aI=
> > > > > > =N5tm
> > > > > > -----END PGP SIGNATURE-----
> > > > > >
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> > > > > >
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> > > > >
> > > >
> > > > --
> > > > Chemist who falls in acid is absorbed in work.
> > > >
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> > > > jUski37//POX7r5outyRjRM=
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> > >
> >
> > --
> > "Put the 'off' button on."
> >
> > - George W. Bush
> > 02/14/2000
> > giving advice to parents troubled by the graphic fare on television
>
>
>
> > _______________________________________________
> > MEncoder-users mailing list
> > MEncoder-users at mplayerhq.hu
> > https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
>
> --
> "We're concerned about AIDS inside our White House -- make no mistake
> about it."
>
> - George W. Bush
> 02/07/2001
>
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