14 Replies Latest reply on Mar 6, 2012 7:22 PM by taz291819

    Mercury Playback GPU Accelaration interlace H.264 encoding problem

    MontyPython Level 1

      I have just ,managed to get my MSI GT780 running NVidia GTX  560M video card switched over to use GPU playback in Premiere CS5.5.

       

      Problem is, when I render full HD 1080 25p AVCHD video, it playsback interlaced with lines across the screen yet the footage is progressive.

       

      Any ideas and help please?

        • 1. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
          Harm Millaard Level 7

          Let me get this straight:

           

          • Source is progressive
          • Render is progressive
          • Monitor is progressive

           

          So how do you establish that the result is interlaced?

          • 4. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
            Jim_Simon Level 8

            Where exactly are you viewing the result?  Is the export for computer, web or Blu-ray playback?

            • 5. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
              MontyPython Level 1

              For the web. It could be somethong to do with .mts files (from Panansonic SD900) as mp4's from t he Canon 600D does have this effect after encoding.

              • 6. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
                Jim_Simon Level 8

                OK.

                 

                What mode are you shooting in with the Panasonic?  What are the specs of the media?

                 

                Also, what are the specs of the sequence and what are your exact export settings?

                • 7. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
                  MontyPython Level 1

                  General

                  ID                                       : 1 (0x1)

                  Complete name                            : D:\AVCHDMXF\Video files\00595.MTS

                  Format                                   : BDAV

                  Format/Info                              : Blu-ray Video

                  File size                                : 5.51 MiB

                  Duration                                 : 2s 854ms

                  Overall bit rate mode                    : Variable

                  Overall bit rate                         : 16.2 Mbps

                  Maximum Overall bit rate                 : 18.0 Mbps

                   

                  Video

                  ID                                       : 4113 (0x1011)

                  Menu ID                                  : 1 (0x1)

                  Format                                   : AVC

                  Format/Info                              : Advanced Video Codec

                  Format profile                           : High@L4.0

                  Format settings, CABAC                   : Yes

                  Format settings, ReFrames                : 4 frames

                  Format settings, GOP                     : M=3, N=12

                  Codec ID                                 : 27

                  Duration                                 : 2s 800ms

                  Bit rate mode                            : Variable

                  Bit rate                                 : 15.2 Mbps

                  Maximum bit rate                         : 16.8 Mbps

                  Width                                    : 1 920 pixels

                  Height                                   : 1 080 pixels

                  Display aspect ratio                     : 16:9

                  Frame rate                               : 25.000 fps

                  Color space                              : YUV

                  Chroma subsampling                       : 4:2:0

                  Bit depth                                : 8 bits

                  Scan type                                : Interlaced

                  Scan order                               : Top Field First

                  Bits/(Pixel*Frame)                       : 0.293

                  Stream size                              : 5.06 MiB (92%)

                   

                  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                                 : 2s 912ms

                  Bit rate mode                            : Constant

                  Bit rate                                 : 384 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                  : -80ms

                  Stream size                              : 137 KiB (2%)

                   

                  Text

                  ID                                       : 4608 (0x1200)

                  Menu ID                                  : 1 (0x1)

                  Format                                   : PGS

                  Codec ID                                 : 144

                  Duration                                 : 2s 336ms

                  Delay relative to video                  : -80ms

                   

                  ------------------------------------------------------------

                   

                  Exporting:

                   

                  Mainconcept H.264 1080 25p 12mbs 16:9

                  Profile - main

                  Level - 5.1

                  Render max deph

                  • 8. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
                    taz291819 Level 1

                    Your source footage is interlaced, and the Mainconcept Encoder is basically removing fields to de-interlace.  IMO, this is not a good way to de-interlace.  You need to export the final video as interlaced, but use the Blu-Ray H.264 preset, as the regular H.264 preset doesn't output interlaced footage correctly (it still de-interalces it).

                    • 11. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
                      MontyPython Level 1

                      Thanks but it puts it out as two files, one if m4v and wav. How do i render in that mode as a complete render of video and audio?

                      • 12. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
                        taz291819 Level 1

                        After you select Blu-Ray H.264, at the bottom, click on the audio tab.  Change it from PCM to Dolby Digital.  Then click on the Multiplex tab, and select TS.  That'll make it output a single file.

                         

                        Honestly, I don't know why it won't multiplex the video and audio when using PCM, but I wish it did.  You can use other software to mux the files into a single file, but it's nice having it all done at once. 

                        • 14. Re: Mercury Playback GPU Accelaration interlace H.264 encoding problem
                          taz291819 Level 1

                          I'm glad it worked out for you.

                           

                          I really wish Adobe, or Mainconcept, would fix the regular H.264 preset to work correctly.  De-interlacing video even when you tell it not to has been a bug for quite a while.  I don't know why this issue hasn't been fixed yet.