2 Replies Latest reply on Nov 5, 2012 2:50 PM by taz291819

    Exported .mp4 and FlipFactory audio sync problems

    taz291819

      I work for a television station, and we use FlipFactory to convert everything before going to our playout server.

       

      When using the H.264 preset in CS5.5, everything works fine.

       

      When using the same preset in CS6, after going through FlipFactory, the audio sync starts to drift.  By the end of a 30 minute program, the audio is way out of sync.  If I play the file (after CS6 export, before FlipFactory) in WMP, VLC, MPC, the audio stays in sync.

       

      Using the H.264 BluRay preset, everything is fine (in both CS5.5 and CS6), but obviously, the file size is larger due to the container.

       

      I understand that most will say this is a FlipFactory issue since the file plays back fine before FF does it's thing, but something must have changed from CS5.5 to CS6 regarding the H.264 encoder, as CS5.5's files go through FF just fine.

       

      Any help would be appreciated.

        • 1. Re: Exported .mp4 and FlipFactory audio sync problems
          John T Smith Adobe Community Professional & MVP

          Since you mention WMP, I will presume you are on Windows

           

          So, use http://mediainfo.sourceforge.net/en to analyze the DETAILS of the CS5.5 and CS6 output files to see what is different

          • 2. Re: Exported .mp4 and FlipFactory audio sync problems
            taz291819 Level 1

            Did somewhat of what you asked.  I exported the same show in CS6, one using the H.264 preset, one using the H.264 BluRay preset.  The H.264 preset one drifts out of sync after FlipFactory, the other stays in sync.

             

            Here are the media info specs for each file (I did use different bitrates on the two, but that shouldn't cause an issue):

             

            H.264:

            General

            Complete name                            : D:\Commercials\TORICHMOND\PH6522.mp4

            Format                                   : MPEG-4

            Format profile                           : Base Media / Version 2

            Codec ID                                 : mp42

            File size                                : 3.61 GiB

            Duration                                 : 28mn 30s

            Overall bit rate mode                    : Variable

            Overall bit rate                         : 18.1 Mbps

            Encoded date                             : UTC 2012-11-05 19:56:39

            Tagged date                              : UTC 2012-11-05 19:58:35

            ©TIM                                     : 00:00:00:00

            ©TSC                                     : 30000

            ©TSZ                                     : 1001

             

             

            Video

            ID                                       : 1

            Format                                   : AVC

            Format/Info                              : Advanced Video Codec

            Format profile                           : Main@L4.1

            Format settings, CABAC                   : Yes

            Format settings, ReFrames                : 3 frames

            Codec ID                                 : avc1

            Codec ID/Info                            : Advanced Video Coding

            Duration                                 : 28mn 30s

            Source duration                          : 28mn 30s

            Bit rate mode                            : Constant

            Bit rate                                 : 18.0 Mbps

            Width                                    : 1 920 pixels

            Height                                   : 1 080 pixels

            Display aspect ratio                     : 16:9

            Frame rate mode                          : Variable

            Frame rate                               : 29.970 fps

            Minimum frame rate                       : 29.970 fps

            Maximum frame rate                       : 30.000 fps

            Standard                                 : NTSC

            Color space                              : YUV

            Chroma subsampling                       : 4:2:0

            Bit depth                                : 8 bits

            Scan type                                : Interlaced

            Scan order                               : Top Field First

            Bits/(Pixel*Frame)                       : 0.290

            Stream size                              : 3.57 GiB (99%)

            Source stream size                       : 3.57 GiB (99%)

            Language                                 : English

            Encoded date                             : UTC 2012-11-05 19:56:39

            Tagged date                              : UTC 2012-11-05 19:56:39

            mdhd_Duration                            : 1710709

             

             

            Audio

            ID                                       : 2

            Format                                   : AAC

            Format/Info                              : Advanced Audio Codec

            Format profile                           : LC

            Codec ID                                 : 40

            Duration                                 : 28mn 30s

            Source duration                          : 28mn 30s

            Bit rate mode                            : Variable

            Bit rate                                 : 192 Kbps

            Maximum bit rate                         : 295 Kbps

            Channel(s)                               : 2 channels

            Channel positions                        : Front: L R

            Sampling rate                            : 48.0 KHz

            Compression mode                         : Lossy

            Stream size                              : 38.6 MiB (1%)

            Source stream size                       : 38.6 MiB (1%)

            Language                                 : English

            Encoded date                             : UTC 2012-11-05 19:56:39

            Tagged date                              : UTC 2012-11-05 19:56:39

            mdhd_Duration                            : 1710763

             

            H.264 BluRay:

             

            General

            ID                                       : 0 (0x0)

            Complete name                            : D:\Commercials\TORICHMOND\PH6522A.m2t

            Format                                   : MPEG-TS

            File size                                : 4.93 GiB

            Duration                                 : 28mn 31s

            Overall bit rate mode                    : Variable

            Overall bit rate                         : 24.7 Mbps

             

             

            Video

            ID                                       : 1001 (0x3E9)

            Menu ID                                  : 1 (0x1)

            Format                                   : AVC

            Format/Info                              : Advanced Video Codec

            Format profile                           : High@L4.1

            Format settings, CABAC                   : Yes

            Format settings, ReFrames                : 4 frames

            Codec ID                                 : 27

            Duration                                 : 28mn 30s

            Bit rate mode                            : Variable

            Bit rate                                 : 23.4 Mbps

            Maximum bit rate                         : 24.0 Mbps

            Width                                    : 1 920 pixels

            Height                                   : 1 080 pixels

            Display aspect ratio                     : 16:9

            Frame rate                               : 29.970 fps

            Standard                                 : NTSC

            Color space                              : YUV

            Chroma subsampling                       : 4:2:0

            Bit depth                                : 8 bits

            Scan type                                : Interlaced

            Scan order                               : Top Field First

            Bits/(Pixel*Frame)                       : 0.376

            Stream size                              : 4.66 GiB (95%)

            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                                       : 1002 (0x3EA)

            Menu ID                                  : 1 (0x1)

            Format                                   : AC-3

            Format/Info                              : Audio Coding 3

            Mode extension                           : CM (complete main)

            Codec ID                                 : 129

            Duration                                 : 28mn 30s

            Bit rate mode                            : Constant

            Bit rate                                 : 128 Kbps

            Channel(s)                               : 2 channels

            Channel positions                        : Front: L R

            Sampling rate                            : 48.0 KHz

            Bit depth                                : 16 bits

            Compression mode                         : Lossy

            Stream size                              : 26.1 MiB (1%)