2009-01-07, 07:00
Hi all,
I'm getting a stutter in video playback on my Apple TV running 8.10bf1 (ATV 2.2). It is very subtle (but enough to drive me loopy) and happens every 10 seconds or so. It is most evident in HD mp4/mkv files, I cannot say for sure it is exclusive to HD content but it's definitely more pronounced. I've gone to considerable lengths to ensure the encoding method was something ATV could handle, using different programs, etc so I don't think it's that. Additionally a sample file run locally through ATVfiles ran just fine.
I am playing these files from a Window's share over a powerline adapter. Speed has never been an issue.
Some settings.
I have upscaling disabled
VSync enabled
Rendering Method: tried all 3, no change
CPU Usage during playback is between 40-60% depending on file
Handbrake Encoded Video File Stats.
Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : No
Format settings, ReFrames : 3 frames
Muxing mode : Container [email protected]
Codec ID : V_MPEG4/ISO/AVC
Duration : 3h 12mn
Width : 960 pixels
Height : 384 pixels
Display aspect ratio : 2.445
Frame rate : 25.000 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Writing library : x264 core 65
Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x131 / me=umh / subme=7 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=6 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=crf / crf=20.9 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Audio
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : A_AAC
Duration : 3h 12mn
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 48.0 KHz
Resolution : 16 bits
Language : English
I wouldn't mind spending the extra money for a full fledged HTPC but I don't want to do it if system power is not my problem.
Thanks a bunch
I'm getting a stutter in video playback on my Apple TV running 8.10bf1 (ATV 2.2). It is very subtle (but enough to drive me loopy) and happens every 10 seconds or so. It is most evident in HD mp4/mkv files, I cannot say for sure it is exclusive to HD content but it's definitely more pronounced. I've gone to considerable lengths to ensure the encoding method was something ATV could handle, using different programs, etc so I don't think it's that. Additionally a sample file run locally through ATVfiles ran just fine.
I am playing these files from a Window's share over a powerline adapter. Speed has never been an issue.
Some settings.
I have upscaling disabled
VSync enabled
Rendering Method: tried all 3, no change
CPU Usage during playback is between 40-60% depending on file
Handbrake Encoded Video File Stats.
Video
Format : AVC
Format/Info : Advanced Video Codec
Format profile : [email protected]
Format settings, CABAC : No
Format settings, ReFrames : 3 frames
Muxing mode : Container [email protected]
Codec ID : V_MPEG4/ISO/AVC
Duration : 3h 12mn
Width : 960 pixels
Height : 384 pixels
Display aspect ratio : 2.445
Frame rate : 25.000 fps
Resolution : 24 bits
Colorimetry : 4:2:0
Scan type : Progressive
Writing library : x264 core 65
Encoding settings : cabac=0 / ref=3 / deblock=1:0:0 / analyse=0x1:0x131 / me=umh / subme=7 / psy_rd=1.0:0.0 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=0 / 8x8dct=0 / cqm=0 / deadzone=21,11 / chroma_qp_offset=-2 / threads=6 / nr=0 / decimate=1 / mbaff=0 / bframes=6 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=3 / wpredb=1 / keyint=250 / keyint_min=25 / scenecut=40(pre) / rc=crf / crf=20.9 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / ip_ratio=1.40 / pb_ratio=1.30 / aq=1:1.00
Audio
Format : AAC
Format/Info : Advanced Audio Codec
Format version : Version 4
Format profile : LC
Format settings, SBR : No
Codec ID : A_AAC
Duration : 3h 12mn
Channel(s) : 2 channels
Channel positions : L R
Sampling rate : 48.0 KHz
Resolution : 16 bits
Language : English
I wouldn't mind spending the extra money for a full fledged HTPC but I don't want to do it if system power is not my problem.
Thanks a bunch