[MEncoder-users] h264 (and help with encoding) or divx
Brian Penick
bydivinerite at gmail.com
Sat Mar 8 12:48:28 CET 2008
I also forgot. try putting harddup at the of your -vf chain. If mencoder
duplicates a frame to maintain audio sync without that option the frame
won't be copied twice it'll just tag it which mp4box doesn't like so that
could be another source of audio issues.
On Sat, Mar 8, 2008 at 5:39 AM, Brian Penick <bydivinerite at gmail.com> wrote:
> 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-----
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> > > > > > >
> > > > > > >
> > iD8DBQFHzesikZz88chpJ2MRAhU5AJ99LTsMw5u5h1rLN/fiMV2yaas8jQCgtizW
> > > > > > > u3KheaAME+oLkJSZn0i11aI=
> > > > > > > =N5tm
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> > > > > > >
> > > > > > > _______________________________________________
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> > > > > > >
> > > > > > _______________________________________________
> > > > > > MEncoder-users mailing list
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> > > > > >
> > > > >
> > > > > --
> > > > > Chemist who falls in acid is absorbed in work.
> > > > >
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> > > > > jUski37//POX7r5outyRjRM=
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> > > > MEncoder-users at mplayerhq.hu
> > > > https://lists.mplayerhq.hu/mailman/listinfo/mencoder-users
> > > >
> > >
> > > --
> > > "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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> >
> > iD8DBQFH0ekOkZz88chpJ2MRAvSNAKCEn6/aL/22m0ko5rezJ9eGbUQ2sgCgiIVH
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