Choppy playback of QuickTime / Motion JPEG video
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December 13, 2010 at 10:24 pm #2327510piplup09Participant
First of all, many thanks to developers for all time spent in coding and improving wiimc. I think it worthwhile to have a wii just for running wiimc. Really!!!
Coming back to the point, I have some problem in playing videos recorded with a Nikon coolpix camera. MPlayerCE 0.80 r619 plays them smootly, while using wiimc the playback is choppy. I tried both wiimc v1.1.0 and a custom build based on svn r730.
The video specs are the following:
Complete name : E:DSCN2563.MOV
Format : QuickTime
Format/Info : Original Apple specifications
File size : 23.1 MiB
Duration : 22s 733ms
Overall bit rate : 8 517 Kbps
Movie name/More : NIKON DIGITAL CAMERA
Encoded date : UTC 2010-06-05 08:29:22
Tagged date : UTC 2010-06-05 08:29:22
Writing library : Nikon
Origin : Digital Camera
Video
ID : 1
Format : JPEG
Codec ID : jpeg
Duration : 22s 733ms
Bit rate mode : Variable
Bit rate : 8 428 Kbps
Width : 640 pixels
Height : 480 pixels
Display aspect ratio : 4:3
Frame rate mode : Constant
Frame rate : 30.000 fps
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.914
Stream size : 22.8 MiB (99%)
Language : English
Encoded date : UTC 2010-06-05 08:29:22
Tagged date : UTC 2010-06-05 08:29:22
Audio
ID : 2
Format : PCM
Format settings, Endianness : Little
Format settings, Sign : Unsigned
Codec ID : raw
Duration : 22s 733ms
Bit rate mode : Constant
Bit rate : 64.0 Kbps
Channel(s) : 1 channel
Sampling rate : 7 875 Hz
Bit depth : 8 bits
Stream size : 175 KiB (1%)
Language : English
Encoded date : UTC 2010-06-05 08:29:22
Tagged date : UTC 2010-06-05 08:29:22
If useful, I can upload a short video (in the tracker area) and/or test patches.
Thanks in advance
December 13, 2010 at 11:42 pm #27987rodriesKeymasterIt would be helpful to upload a sample.
December 13, 2010 at 11:57 pm #27988cadbuscaParticipantThat is a huge bit rate. Have you enabled framedropping? Its unlikely the WII can play at that bitrate unless it can drop at least half the frames. (standard DVD’s are 4000 kbps)
December 14, 2010 at 1:22 am #27989rodriesKeymasterjhb50 is right, probably on mplayer ce you have frame dropping enabled. try enabling it in WiiMC.
December 14, 2010 at 9:42 am #2799010piplup09ParticipantThanks Tantric and jhb50 for your quick reply.
I noticed the high bitrate of the video stream and I also tried to store the video on a sdhc card in place of a usb memory key, but the result was the same.
I’m quite sure the frame dropping was enabled in wiimc too. Now I’m at work 🙁 but as soon as I get home I’ll check it again and upload a sample.December 14, 2010 at 2:57 pm #27991cadbuscaParticipantWon’t matter where it is stored. Its a WII CPU problem.
December 14, 2010 at 6:56 pm #2799210piplup09ParticipantI uploaded a short .mov sample as issue #296 http://www.wiimc.org/tracker/index.php?do=details&task_id=296.
I can confirm that the frame dropping was enabled in WIIMC. Disabling it, video plays smootly but slower than real-time and out of audio sync.December 15, 2010 at 7:24 am #27993cadbuscaParticipantYes, that’s the symptom of an AVC file over 640 wide and bitrate exceeding the WII’s capability. The audio plays fine but the half speed video makes it seem out of sync. The solution is use VLC-Shares.
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