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Old 15 Sep 2008, 03:24 AM   #1
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Default Good MPEG4 H264 HP to MPEG-4 VISUAL H264 Converter???

Hi,
I'm having problems creating 'MPEG-4 Visual' files, baseline profile at L1.
I have a mobile device which has a great display but can only
play back MPEG-4 H264 BP L1 files.
For some reason every app I've tried except for 3GP Converter has not been
able to generate these files, they either generate MPEG-4 files or they
generate files with BP at L2 or 3 and with reference frames. The device
I want to play these files on can only play back 640by480 Mpeg4 Visual
files at Base Profile @L1, Without any form of B-frames or extra stuff.
Now 3GP_Converter seems to work but some files like this one below:
General
Complete name : C:\Tsukishima_Kirari_starring_Kusumi_Koharu__Happy .mp4
Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 35.0 MiB
Duration : 4mn 14s
Overall bit rate : 1 155 Kbps
Encoded date : UTC 2007-05-12 07:58:17
Tagged date : UTC 2007-05-12 07:58:17
Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L5.1
Format settings, CABAC : Yes
Format settings, ReFrames : 16 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 4mn 14s
Bit rate mode : Variable
Bit rate : 1 026 Kbps
Maximum bit rate : 2 098 Kbps
Width : 716 pixels
Height : 356 pixels
Display aspect ratio : 16/9
Frame rate mode : Constant
Frame rate : 23.976 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.168
Stream size : 31.1 MiB (89%)
Writing library : x264 core 54 svn-635M
Encoding settings : cabac=1 / ref=16 / deblock=1:-2:-1 / analyse=0x3:0x133 / me=umh / subme=7 / brdo=1 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=2 / deadzone=21,11 / chroma_qp_offset=0 / threads=3 / nr=0 / decimate=0 / mbaff=0 / bframes=3 / b_pyramid=1 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / bime=1 / keyint=240 / keyint_min=24 / scenecut=40(pre) / rc=crf / crf=21.5 / rceq='blurCplx^(1-qComp)' / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30
Encoded date : UTC 2007-05-12 05:17:05
Tagged date : UTC 2007-05-12 07:58:19

generate this when I use 3GP Converter, and even at 2500Kbps the file is full of blocks, and is just
ugly (and is 3x the size of the original).
General
Complete name : E:\3GP_Converter034\Tsukishima_Kirari_starring_Kus umi_Koharu__Happy.MP4
Format : MPEG-4
Codec ID : M4V
File size : 92.7 MiB
Duration : 4mn 14s
Overall bit rate : 3 060 Kbps
Movie name : Tsukishima_Kirari_starring_Kusumi_Koharu__Happy
Encoded date : UTC 2008-09-14 15:13:52
Tagged date : UTC 2008-09-14 15:13:52
Writing application : 3GP_Converter051103 www.nurs.or.jp/~calcium FFmpegCVSb4629
Comment : QuickTime 6.0 or greater
Video
Format : MPEG-4 Visual
Format profile : Simple@L1
Format settings, BVOP : No
Format settings, QPel : No
Format settings, GMC : No warppoints
Format settings, Matrix : Default
Codec ID : 20
Duration : 4mn 14s
Bit rate mode : Constant
Bit rate : 2 932 Kbps
Nominal bit rate : 3 000 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4/3
Frame rate mode : Constant
Frame rate : 29.970 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Bits/(Pixel*Frame) : 0.318
Stream size : 88.9 MiB (96%)
Encoded date : UTC 2008-09-14 15:13:52
Tagged date : UTC 2008-09-14 15:13:52
I generated this file using:
ffmpeg" -y -i "<%InputFile%>" -title "<%Title%>" -timestamp "<%TimeStamp%>" -bitexact -vcodec mpeg4 -s 640x480 -r 29.97 -b 3000 -acodec aac -ac 2 -ar 48000 -ab 64 -f ipod "<%OutputFile%>.MP4""
in 3GP Converter.
SO my problem is this, I need a way of generating MPEG-4 "Visual" files at Baseline profile L1 which
look just as good as this tiny file which seems to have been made at MPEG-4 High@L5.1. The original 30MB
file looks brilliant, but the 97MB file I get above just looks ugly.
Anyone has any pointers or ideas?
Thank you .
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Old 15 Sep 2008, 10:39 AM   #2
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