R: Re: R: Re: Output XDCAM footage with kdenlive

[Massimo Stella]

If you check the email I wrote some days ago you'll find all the information about xdcam ex files.
I checked a file produced by a  Sony Xdcam camera by MediaInfo and I posted all the detailed results.
Then J-B and I generated manually the string of code. The "g=12" parameter is referred to the lenght of the GOP (Group Of Pictures) of the mpeg file.
As the XDCam format is a long gop format this is actually a very important parameter if you want to respect the exact format of this kind of clip.
Now I have not time to explore better the problem but in my opinion this could be generated by the mp4 container which looks like is not too friendly with the uncompressed PCM audio format, but the XDCam profile has to be: container mp4, video mpeg2 long gop (blue-ray standard) and audio PCM at 48.000Hz.
As XDCam is a proprietary format is not impossible that a standard mp4 container isn't allowed to mux uncompressed PCM audio.
This could be why ffmpeg has problems in muxing this kind of content. Of course a deeper investigation is needed. 
For the rest the string means I posted means this:

f=mp4 - format mp4
vcodec=mpeg2video   - video codec mpeg2
g=12 - GOP 12 frames
vb=35M - Video Bitrate 35 Mb/sec
acodec=pcm_s16be - Audio Codec PCM 16bit BigEndian
ar=48000 - Audio Ratio 48000 Hz

I hope this can help.

Massimo. 



----Messaggio originale----

Da: j.reitsma at hccnet.nl

Data: 28-apr-2018 21.02

A: <kdenlive at kde.org>

Ogg: Re: R: Re: Output XDCAM footage with kdenlive




  
  
    Thanks!

      

      If I use the parameters you mention below, rendering is stuck
      right at the beginning. The error message reads

      

      
      [mp4 @ 0x7f526c000f00] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead. [mp4 @ 0x7f526c000f00] Using AVStream.codec to pass codec parameters to muxers is deprecated, use AVStream.codecpar instead.
[mp4 @ 0x7f526c000f00] Could not find tag for codec pcm_s16be in stream #1, codec not currently supported in container [consumer avformat] Could not write header '/home/jogchum/Videodata/Videocamera/Taalfilmkes/Waldreis/Wâldreis-3.mp4'
      

      I tried to switch the codec to pcm_s16le, one that is mentioned in one of the mlt-6 consumer profiles, but that made no difference.
      

      Btw, where can I get info about the parameter values? E.g., what does "g=12" mean? 

      

      

      Op 25-04-18 om 22:49 schreef Massimo Stella:

    
    <...>

      You can try to do this by using this parameters:

      

      f=mp4 vcodec=mpeg2video g=12 vb=35M acodec=pcm_s16be ar=48000

      

      <...>

    
    


  





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