Originally Posted by buffos

I tried both moboplayer + rockplayer (for tegra2). Both refuse to play with hardware accelaration mode + both have a lot of issues with softplayer (sound + image)

Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1

Codec ID : V_MPEG4/ISO/AVC

Width : 1 280 pixels
Height : 720 pixels

Overall bit rate : 3 638 Kbps
Frame rate : 23.976 fps

Interesting, I too can't play 1280x720p High@L4.1 and overall bitrate over 3Mbps.
I'm reproducing your results with all my files that are full 720p High@L4.1, they're all running at an overall bitrate of over 3Mbps.

Oddly enough, here is another that won't play for me:

Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 2.50 GiB
Duration : 1h 55mn
Overall bit rate : 3 089 Kbps
Encoded date : UTC 2010-10-03 15:03:08
Tagged date : UTC 2010-10-03 15:03:08

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 1h 55mn
Bit rate mode : Variable
Bit rate : 2 720 Kbps
Maximum bit rate : 24.0 Mbps
Width : 1 280 pixels
Height : 544 pixels
Display aspect ratio : 2.35:1
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.163
Stream size : 2.20 GiB (88%)
Writing library : x264 core 104 r1677 19df41a
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=4 / psy=1 / psy_rd=0.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=1 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=2720 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Encoded date : UTC 2010-10-03 03:56:21
Tagged date : UTC 2010-10-03 15:06:32

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 1h 55mn
Bit rate mode : Variable
Bit rate : 366 Kbps
Maximum bit rate : 456 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 303 MiB (12%)
Language : English
Encoded date : UTC 2010-10-03 15:06:03
Tagged date : UTC 2010-10-03 15:06:32

yet, this plays:

Format : MPEG-4
Format profile : Base Media
Codec ID : isom
File size : 2.50 GiB
Duration : 2h 4mn
Overall bit rate : 2 871 Kbps
Encoded date : UTC 2010-09-09 00:35:28
Tagged date : UTC 2010-09-09 00:35:28

Video
ID : 1
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L4.1
Format settings, CABAC : Yes
Format settings, ReFrames : 4 frames
Codec ID : avc1
Codec ID/Info : Advanced Video Coding
Duration : 2h 4mn
Bit rate mode : Variable
Bit rate : 2 480 Kbps
Maximum bit rate : 14.2 Mbps
Width : 1 280 pixels
Height : 544 pixels
Display aspect ratio : 2.35:1
Frame rate mode : Constant
Frame rate : 23.976 fps
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.149
Stream size : 2.16 GiB (86%)
Writing library : x264 core 104 r1677 19df41a
Encoding settings : cabac=1 / ref=4 / deblock=1:0:0 / analyse=0x3:0x113 / me=hex / subme=4 / psy=1 / psy_rd=0.00:0.00 / mixed_ref=0 / me_range=16 / chroma_me=1 / trellis=1 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=0 / threads=3 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / constrained_intra=0 / bframes=3 / b_pyramid=0 / b_adapt=1 / b_bias=0 / direct=1 / weightb=1 / open_gop=0 / weightp=1 / keyint=250 / keyint_min=23 / scenecut=40 / intra_refresh=0 / rc_lookahead=40 / rc=2pass / mbtree=1 / bitrate=2480 / ratetol=1.0 / qcomp=0.60 / qpmin=10 / qpmax=51 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Encoded date : UTC 2010-09-08 14:08:51
Tagged date : UTC 2010-09-09 00:40:19

Audio
ID : 2
Format : AAC
Format/Info : Advanced Audio Codec
Format profile : LC
Codec ID : 40
Duration : 2h 4mn
Bit rate mode : Variable
Bit rate : 384 Kbps
Maximum bit rate : 500 Kbps
Channel(s) : 6 channels
Channel positions : Front: L C R, Side: L R, LFE
Sampling rate : 48.0 KHz
Compression mode : Lossy
Stream size : 345 MiB (13%)
Language : English
Encoded date : UTC 2010-09-09 00:39:35
Tagged date : UTC 2010-09-09 00:40:19

If we can spot the major difference(s), we may find the culprit.
Could it be overall bitrate or something else I've missed? Either way, I hope Acer sends an update soon. There's no way our tablet needs to be this picky.

Hi Neoprimal and texonex,

I recently bought the acer a500 two days ago and so far the thing that has disappointed me is video playback. I have many movies downloaded from net (.mp4, .avi, .mkv, etc.) which play well in VLC Player on my Win 7 laptop. With Mobo and Rock Player, I am able to play them on my a500 without any conversion, but on my iconia tab, somehow the video and audio gets out of sync. The audio is ahead of video and that is giving me a bad experience. You hear a dialog before and the person saying it appears afterwards.

Do you think the update coming in June would resolve this issue? NCIX guy told me I can return it within 15 days (which will get over before June comes) but really speaking I would hate to return this. The tab is perfect and has all the ports one need except for this bad video playback experience.

Please advice.

Regards,
Md. Irfan

Originally Posted by irfan2288

Hi Neoprimal and texonex,

I recently bought the acer a500 two days ago and so far the thing that has disappointed me is video playback.

According to Nvidia website, Tegra 2 processor can handle both 720p and 1080p HD video, but honeycomb unfortunately can't. This is how Tegra 2, honeycomb and applications interact with each other:

Nvidia Tegra 2 (hardware)<=> Honeycomb (operating system)<=> Applications (software)

By saying that, I don't think any application is able to hardware decode HD videos until honeycomb is capable of doing so. When you tried to play HD videos with Rockplayer or Mobo, you were actually played them using software decoding and everyone knows that it does not go well such as stuttering, video/audio out of sync, or even no audio.

I honestly don't know if google is going to release a fix for this; hopefully, honeycomb 3.1 will. Until then, we have to re-encode HD videos in a specific way so that our tablet or any Tegra2/Honeycomb tablet can play them smoothly.

There are many choices of video converting software on the market right now but I personally use handbrake to re-encode my HD videos. Attached is the preset that works very well on the iconia (rename the file to have a .plist extension) that I took from the transformer forum, or you can go here

http://forum.xda-developers.com/show....php?t=1060825

I hope this can help you with your decision whether or not to return your tablet.

@ other xda members, if I stated anything wrong about this matter, please feel free to correct.

Tegra2 can handle 720p BASIC profile and not HIGH profile. This is what i found out by reading this forum (and the net). So this is NOT a honeycomb issue but a Tegra2 issue and i do not expect to be "fixed"

Per nvidia, these are what the 250 can decode at 1080p:

H.264 mainprofile
VC-1 AP
MPEG2
MPEG-4
DivX 4/5
XviD HT
H.263
Theora
VP8
WMV
Sorenson Spark
Real Video
VP6

I am hoping the update in June (possibly 3.1?, just conjecture) will improve some of this decoding support...only time will tell.

sigh.

convert your movies using this handbrake profile: http://www.youtube.com/watch?v=cVBpeQNWbEQ

yes, it works. i've converted numerous 1080p movies using this profile and while the file sizes are still sizable, the resulting conversions run 100% h/w accelerated in moboplayer (if it weren't, mobo would tell you to re-run the file via software decoding). i've yet to have any issues whatsoever.

Hmm so the iPad also has video playback issues? I was about to switch over to the iPad 2 so I do not have these issues but the video seems to indicate they also have that issue....