7 Replies Latest reply on Jul 12, 2012 6:48 PM by Jim_Simon

    Need to convert to FLV with specific audio options

    GMiddlemiss

      Hi all,

       

      I'm struggling with a video conversion that I need to do.

       

      We have a short 3 minute video that we've produced, but when played back on our Corporate intranet over most user's PCs - almost all the speech in the file is inaudible, just the background music.  We've tested the video over stereo headsets, speakers etc and all is fine.  However, lots of users in our business use mono USB Plantronics headsets, and it's these users who are struggling. I've tried many different formats and still have this issue.

       

      We are requested by our IT dept to use FLV format for video wherever possible.

       

      I've run a video I know works fine against our own video using iMedia HUD app on my Mac to compare the codecs etc, and these are the results:

       

      WORKING VIDEO

       

      quad1.flv

      Format                                                                      : Flash Video

      File size                                                                      : 62.5 MiB

      Duration                                                                      : 3mn 45s

      Overall bit rate                                                  : 2 324 Kbps

      Writing application                                                  : Lavf52.84.0

       

      Video

      Format                                                                      : Sorenson Spark

      Codec ID                                                                      : 2

      Duration                                                                      : 3mn 45s

      Bit rate                                                                      : 195 Kbps

      Width                                                                      : 450 pixels

      Height                                                                      : 300 pixels

      Display aspect ratio                                        : 3:2

      Frame rate mode                                                  : Constant

      Frame rate                                                            : 25.000 fps

      Bit depth                                                                      : 8 bits

      Bits/(Pixel*Frame)                                                  : 0.058

      Stream size                                                            : 5.25 MiB (8%)

       

      Audio

      Format                                                                      : MPEG Audio

      Format version                                                  : Version 1

      Format profile                                                            : Layer 3

      Mode                                                                      : Joint stereo

      Mode extension                                                  : MS Stereo

      Codec ID                                                                      : 2

      Codec ID/Hint                                                            : MP3

      Duration                                                                      : 3mn 45s

      Bit rate mode                                                            : Constant

      Bit rate                                                                      : 128 Kbps

      Channel(s)                                                            : 2 channels

      Sampling rate                                                            : 44.1 KHz

      Compression mode                                        : Lossy

      Stream size                                                            : 3.44 MiB (6%)

      Writing library                                                            : LAME3.98.4

       

       

      NEW VIDEO (Non-Working)

       

      Virgin_Kon_v8.mp4

      Format                                                                      : MPEG-4

      Format profile                                                            : Base Media / Version 2

      Codec ID                                                                      : mp42

      File size                                                                      : 34.9 MiB

      Duration                                                                      : 2mn 20s

      Overall bit rate                                                  : 2 078 Kbps

      Encoded date                                                            : UTC 2012-07-09 15:38:42

      Tagged date                                                            : UTC 2012-07-12 07:25:56

       

      Video

      ID                                                                                : 1

      Format                                                                      : AVC

      Format/Info                                                            : Advanced Video Codec

      Format profile                                                            : Baseline@L3.0

      Format settings, CABAC                                        : No

      Format settings, ReFrames                              : 2 frames

      Codec ID                                                                      : avc1

      Codec ID/Info                                                            : Advanced Video Coding

      Duration                                                                      : 2mn 20s

      Bit rate                                                                      : 1 915 Kbps

      Width                                                                      : 640 pixels

      Height                                                                      : 360 pixels

      Display aspect ratio                                        : 16:9

      Frame rate mode                                                  : Constant

      Frame rate                                                            : 25.000 fps

      Color space                                                            : YUV

      Chroma subsampling                                        : 4:2:0

      Bit depth                                                                      : 8 bits

      Scan type                                                                      : Progressive

      Bits/(Pixel*Frame)                                                  : 0.332

      Stream size                                                            : 32.1 MiB (92%)

      Language                                                            : English

      Encoded date                                                            : UTC 2012-07-09 15:38:42

      Tagged date                                                            : UTC 2012-07-09 15:38:44

      Color primaries                                                  : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M

      Transfer characteristics                                        : BT.709-5, BT.1361

      Matrix coefficients                                                  : BT.601-6 525, BT.1358 525, BT.1700 NTSC, SMPTE 170M

       

      Audio

      ID                                                                                : 2

      Format                                                                      : AAC

      Format/Info                                                            : Advanced Audio Codec

      Format profile                                                            : LC

      Codec ID                                                                      : 40

      Duration                                                                      : 2mn 20s

      Bit rate mode                                                            : Constant

      Bit rate                                                                      : 160 Kbps

      Channel(s)                                                            : 2 channels

      Channel positions                                                  : Front: L R

      Sampling rate                                                            : 48.0 KHz

      Compression mode                                        : Lossy

      Stream size                                                            : 2.69 MiB (8%)

      Language                                                            : English

      Encoded date                                                            : UTC 2012-07-09 15:38:42

      Tagged date                                                            : UTC 2012-07-09 15:38:44

       

      Can anyone offer any advice - I would like to convert it to match but I'm not sure of how to get these settings.

       

      Just for clarity - the video plays perfectly well, it's just the audio we are having issue with.  It's played via FlowPlayer on our SharePoint intranet.  This is the first video we have had this issue with.