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Author Topic: MED 500X2 problem with M2TS 5.1 file play  (Read 781 times)
jdelport
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« on: December 27, 2011, 10:56:54 am »

Hi, I have a new 500X2 and tried playing a M2TS file that I was able to play on my previous 500X. The file plays very stuttery and skips like it is playing at 1.5X speed. Audio does not play most of the time and it's only about every 10 seconds that you can hear some audio playing very briefly. This file is recorded in 720p through my Hauppauge HD PVR.  Like I said the file plays just fine on my old 500X, so why is it not playing on my new 500X2?  Both players have the latest firmware loaded (500X2=v2.02 and 500=v4.05).

I have uploaded the media file with descriptions to the ftp server as file "jdelport_file_problem_m2ts-5.1.zip" as instructed on the forum.
The video file is also available at:
https://skydrive.live.com/redir.aspx?cid=51ab84dbaa673f93&resid=51AB84DBAA673F93!199&parid=51AB84DBAA673F93106&authkey=!AIeUPCK7xuT144s

Here is the file's MediaInfo:
General
ID                               : 0 (0x0)
Complete name                    : D:\Temp\Hauppauge HD PVR tests\m2ts-5.1.M2TS
Format                           : MPEG-TS
File size                        : 25.0 MiB
Duration                         : 45s 173ms
Overall bit rate mode            : Variable
Overall bit rate                 : 4 634 Kbps
Maximum Overall bit rate         : 18.0 Mbps

Video
ID                               : 4113 (0x1011)
Menu ID                          : 1 (0x1)
Format                           : AVC
Format/Info                      : Advanced Video Codec
Format profile                   : Main@L4.0
Format settings, CABAC           : Yes
Format settings, ReFrames        : 4 frames
Codec ID                         : 27
Duration                         : 45s 300ms
Bit rate mode                    : Variable
Bit rate                         : 3 952 Kbps
Maximum bit rate                 : 20.0 Mbps
Width                            : 1 280 pixels
Height                           : 720 pixels
Display aspect ratio             : 16:9
Frame rate                       : 50.000 fps
Color space                      : YUV
Chroma subsampling               : 4:2:0
Bit depth                        : 8 bits
Scan type                        : Progressive
Bits/(Pixel*Frame)               : 0.086
Stream size                      : 21.3 MiB (85%)
Color primaries                  : BT.709-5, BT.1361, IEC 61966-2-4, SMPTE RP177
Transfer characteristics         : BT.709-5, BT.1361
Matrix coefficients              : BT.709-5, BT.1361, IEC 61966-2-4 709, SMPTE RP177

Audio
ID                               : 4352 (0x1100)
Menu ID                          : 1 (0x1)
Format                           : AC-3
Format/Info                      : Audio Coding 3
Mode extension                   : CM (complete main)
Codec ID                         : 129
Duration                         : 45s 248ms
Bit rate mode                    : Constant
Bit rate                         : 448 Kbps
Channel(s)                       : 6 channels
Channel positions                : Front: L C R, Side: L R, LFE
Sampling rate                    : 48.0 KHz
Bit depth                        : 16 bits
Compression mode                 : Lossy
Delay relative to video          : -60ms
Stream size                      : 2.42 MiB (10%)


Any help appreciated.

Regards
Johan
« Last Edit: December 27, 2011, 01:02:45 pm by jer1956 » Logged
jer1956
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« Reply #1 on: December 27, 2011, 12:55:12 pm »

The 1073 chip was more tolerent...and could fix some incorrect information. In this case the file says it is 50 hz progressive. No way is that true. I remuxed using mkvmerge and forced the file to have a 25 hz FPS. This dosn't transcode...it jsut repackages using corrected FPS data.  The file then plays.

Tolerence to  bad data or bad media is not specficfied.  So  when you change chip...be it make or model...then the tolerence may change. Some less than perfect files which played before...will not play without corrections.
« Last Edit: December 27, 2011, 01:08:36 pm by jer1956 » Logged
jdelport
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« Reply #2 on: December 27, 2011, 05:49:24 pm »

Thanks jer1956.  I will try to re-mux the file.  But I did check the file and it is actually recorded at 50fps and there is really 50 frames each second.  I also have another file recorded on the same Hauppauge HD PVR, just recorded as stereo and also 50fps and that pplays fine.  So it seems to be only when I record 5.1 surround audio that the problem occurs.

The 1073 chip was more tolerent...and could fix some incorrect information. In this case the file says it is 50 hz progressive. No way is that true. I remuxed using mkvmerge and forced the file to have a 25 hz FPS. This dosn't transcode...it jsut repackages using corrected FPS data.  The file then plays.

Tolerence to  bad data or bad media is not specficfied.  So  when you change chip...be it make or model...then the tolerence may change. Some less than perfect files which played before...will not play without corrections.
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jer1956
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« Reply #3 on: December 27, 2011, 06:15:26 pm »

Some refer to field rate...not frame rate. The remuxers have no 50 or 60 hz options...because they deal with frames...not feilds. So the is video is 50 fields per second...with every other two making a progresive frame...or 25 frames per second. The chip is expecting frame rate...not field rate.
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jdelport
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« Reply #4 on: December 27, 2011, 06:41:57 pm »

OK that makes sense thanks.  But howcome another file recorded with the same settings, just stereo instead of 5.1 plays fine?  I compared it's video properties in MediaInfo and except for the audio differences the 2 files are exactly the same and the one plays fine and the other not?

Some refer to field rate...not frame rate. The remuxers have no 50 or 60 hz options...because they deal with frames...not feilds. So the is video is 50 fields per second...with every other two making a progresive frame...or 25 frames per second. The chip is expecting frame rate...not field rate.
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