• Compression Techniques

  Creating a seamless 10s h.264 loop for HTML5

  Posted by Pay Bas on November 26, 2013 at 11:15 am

  Hi all, I’m wondering if someone could give me some imput on how to best encode a 10s (30fps) video loop in h.264 so that it loops smoothely in HTML5 containers. So far the results have been a very mixed bag, and I want to keep the filesize as low as possible. My biggest problem is the noticable “jump” when the loop happens, as if the new keyframe pops in. Because the animation contains smoke, there is a noticable stutter in clarity, which only goes away when push the VBR significantly higher (which I want to avoid due to filesize).

  Any and all input is welcome.

  General
Complete name : 1.mp4
Format : MPEG-4
Format profile : Base Media / Version 2
Codec ID : mp42
File size : 492 KiB
Duration : 10s 0ms
Overall bit rate : 403 Kbps
Encoded date : UTC 2013-11-25 11:13:11
Tagged date : UTC 2013-11-26 11:14:30
Writing application : Sorenson Squeeze
Comment : Encoded by

  Video
ID : 1
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 : 10s 0ms
Bit rate mode : Variable
Bit rate : 400 Kbps
Width : 368 pixels
Height : 590 pixels
Display aspect ratio : 0.624
Frame rate mode : Constant
Frame rate : 30.000 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.061
Stream size : 487 KiB (99%)
Writing library : x264 core 129
Encoding settings : cabac=1 / ref=16 / deblock=1:0:0 / analyse=0x3:0x133 / me=tesa / subme=11 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=24 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=0 / chroma_qp_offset=-2 / threads=3 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=16 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=300 / keyint_min=30 / scenecut=0 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=400 / ratetol=20.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Encoded date : UTC 2013-11-25 11:13:11
Tagged date : UTC 2013-11-25 11:13:11

  Pay Bas replied 12 years, 9 months ago 1 Member · 0 Replies
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