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Beginner
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Mpeg2Muxer creates invalid TS files

I'm using the SimpleMuxer sample (http://software.intel.com/en-us/articles/getting-started-with-intel-ipp-unified-media-classes-sample) to create a TS file for use with HTTP Live Streaming. However, the resulting TS file is invalid. Trying to play it in Windows Media player results in a black screen. And when using it for HTTP Live Streaming, the TS won't play at all.

When I use the SimpleEncoder sample (from the sample sample page) to create a .264 file, and let FFMPEG create a TS file from it, then that TS works fine in Media Player and HTTP Live Streaming. So I think there is something wrong with the output from the Mpeg2Muxer class.

Any other people with the same issue or a solution/workaround?
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Employee
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Hello,

What is the verion of the sample code you tested and did you have any change on the example?

If possible, you can also upload theTS file to have a check.

Thanks,
Chao
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Beginner
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IPP Version -- 6.1.1.035
IPP Sample Version -- 6.1.1.044

Ive been trying to get the same thing done, but I havent had any luck. Ive been trying to take a .mp4 file, encoded with H.264 video and AAC audio , and mux it into a series of .ts files. The .ts files I create are able to be played in VLC, but when I tried to play them in Quicktime or on the iPhone, they won't work. I found that Apple has a mediastreamvalidator program which is used to validate streams against various versions of the iPhone. I pointed it at the .ts files I created with the IPP MPEG2Muxer and it came back saying failed to parse segment as either an MPEG-2 TS or an ES: error -12971. I then took the same .mp4 file and put it through one of Apples programs, mediafilesegmenter, that also generates .ts files. Then I pointed mediastreamvalidator at those files and everything worked just fine. Im fairly certain that the mediafilesegmenter is not reencoding the files because it only takes about 15 seconds to run the program on a 5 minute long video.

Any thoughts, suggestions or fixes would be greatly appreciated.

Justin

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Employee
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Just quick thought, What is the Quicktime version? There isrelated issue reported at http://software.intel.com/en-us/forums/showthread.php?t=75828&o=d&s=lr.

what's the result if upgraded to the latest Quicktime 7.6.8?

Regards,
Ying

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Beginner
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Hi Allen Drennan,

did you solved your problem. i'm facing the same problem with you that i submited here: http://software.intel.com/en-us/forums/showthread.php?t=102740&o=a&s=lr
if you solved the problem, could you please share your solution with me. Thanks you very much!
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Beginner
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Not to bring up an old thread - but the muxer is generating incorrect CRC32 values as it is not using crc-32-mpeg.

Using pycrc you can generate the correct crc algorithm using

./pycrc.py --std C99 --model crc-32-mpeg --algorithm table-driven --table-idx-width 8 --generate c -o crc-mpeg.c

then the PMT/PAT code needs to be modified in umc_mpeg2_muxer_chunk.cpp:1067 and anywhere that ippsCRC32_8u(....) is called to use the correct crc algorithm. 

Replace


    //ippsCRC32_8u(bs.m_lpb - uiCRCDataLen, uiCRCDataLen, &uiCRC32);
    //uiCRC32 ^= 0xFFFFFFFF;

With

uiCRC32 = crc_update(0xffffffff, bs.m_lpb - uiCRCDataLen, uiCRCDataLen);

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