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Streamclip Settings for Apple 3?

4216 Views 107 Replies Latest reply: May 29, 2012 3:55 AM by Jon Walker RSS
  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 8:58 PM (in response to thomasmontalto)

    thomasmontalto wrote:

     

    The below is the actual file info from one of the files I was talking about.


    ......

    Audio Stream #1

        Codec.............................................AAC

        Codec (FourCC)....................................40

        Audio Stream Length...............................42mn 18s 26ms

        Audio Stream BitRate..............................128 Kbps

        Audio Stream BitRate Mode.........................VBR

        Number of Audio Channels..........................2

        Audio Channel's Positions.........................Front: L R

        Sampling Rate.....................................48.0 KHz

        Audio Stream Size.................................38.7 MiB (1%)

        Date of Original Encoding.........................UTC 2012-03-29 06:33:13

    I recall that Tom earlier used the analog RCA audio inputs and not digital, so the HDCapture software converted it to 2 channel AAC instead of the 6 channel AC3 passthru in my sample above...

     

    He is getting a digital TOSLINK cable so he can get the 6 channel AC3 passthru in the future; and yes, he will need the corresponding 2nd AAC audio 2 channel track for non-6 channel compatiblity.

     

    Can MPEG Streamclip provide two such audio tracks?

  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:07 PM (in response to MlchaelLAX)

    Jon:

     

    If the AppleTV3 can play the raw output of the Hauppauge HDPVR-1212, such as the one I have sent to you, why transcode at all?  Why not edit and then do a Save As in MPEG Streamclip, so as to not waste any transcoding time?

     

    Of course, there is still the issue of the 2nd audio track (2 channel AAC) that would be needed to be added to the file for audio compatibility.  Is there an easy way to avoid transcoding and then create this 2nd audio track and then add it to the Save As'd file from Streamclip?

     

    Is there a Video Passthrough mode in Streamclip, such as VisualHub had previously?

  • Jon Walker Level 6 Level 6 (17,520 points)
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    May 12, 2012 9:07 PM (in response to MlchaelLAX)

    Like this?  What about frame rate?

     

    Streamclip.png

    I may have to run additional tests here. My normal work flow includes built in frame rate limitations and detelecine so most of my content ends up at 24 (23.976) fps. Test I made prior to first answer was a 24 fps source file so I did not have to worry about this. In fact, your 59.94 sample file using my normal work flow ended up as a 24 fps progressive file.

     

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    iMac, Mac OS X (10.7.3), 3.4 GHz Quad Core i7, 4 GB 1333 MHz
  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:17 PM (in response to Jon Walker)

    Jon Walker wrote:

     

    I may have to run additional tests here. My normal work flow includes built in frame rate limitations and detelecine so most of my content ends up at 24 (23.976) fps. Test I made prior to first answer was a 24 fps source file so I did not have to worry about this. In fact, your 59.94 sample file using my normal work flow ended up as a 24 fps progressive file.

     

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    I suspect that 59.94 down to 24 fps did not have the proper pull-down techniques and hence will suffer from flutter and be choppy...

     

    The Hauppauge digitizes at whatever resolution is fed into it.  Tom and I use our DirecTV HD-DVRs which output in either 720p or 1080i, as selected.  But the resulting file seems to always be 59.94 fps in either mode; even if we are digitizing a motion picture from a premium channel, or a television broadcast chennel as carried by DirecTV, or in my case, using their OTA AM21 Tuner, an OTA television broadcasting channel here in Los Angeles.

     

    It may be different frame rate, if we set the DirecTV box to 480p for SD broadcasts, I will experiment later on that.

  • Jon Walker Level 6 Level 6 (17,520 points)
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    May 12, 2012 9:16 PM (in response to MlchaelLAX)

    Tom wants to edit out commercials in MPEG Streamclip.

    Can be done either before or after encoding. Would need to see a copy of the MP4 file he is using rather than your M2TS file to evaluate which work flow is best/easiest.

     

     

    He cranks his source up to full data rate available on the Hauppauge which is about 17!

    Probably a waste of file space if his content is of the same level of quality as the one you provided. Graphic detail already well deminished.

     

     

    Audio encoding is usually AC3 passthrough from source - from the file analysis that I posted earlier, it looks like 48KHz at 384Kbps.

     

    File was 48.0 KHz at 384 Kbps but only fron two channels were active according to my receiver.

     

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    iMac, Mac OS X (10.7.3), 3.4 GHz Quad Core i7, 4 GB 1333 MHz
  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:18 PM (in response to Jon Walker)

    I will convert it to MP4 and resend it to you.  This is a container conversion and NOT a transcode.

  • Jon Walker Level 6 Level 6 (17,520 points)
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    May 12, 2012 9:19 PM (in response to MlchaelLAX)

    Can MPEG Streamclip provide two such audio tracks?

    No, In fact, it cannot even passthrough/process more than two channels simultaneously. (You can however, process three pairs of two channel audio in successive passes if you are a masochist.

     

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    iMac, Mac OS X (10.7.3), 3.4 GHz Quad Core i7, 4 GB 1333 MHz
  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:22 PM (in response to Jon Walker)

    How about demux the Save As'd Streamclip file and somehow create the simulcast 2 channel AAC file and then mux it all together?

     

    The idea is to AVOID transcoding with the playback power of the ATV3.

  • Jon Walker Level 6 Level 6 (17,520 points)
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    May 12, 2012 9:28 PM (in response to MlchaelLAX)

    If the AppleTV3 can play the raw output of the Hauppauge HDPVR-1212, such as the one I have sent to you, why transcode at all?  Why not edit and then do a Save As in MPEG Streamclip, so as to not waste any transcoding time?

    This is what I was trying to do—i.e., get around having to re-compress the video data. Unfortunately, the M2TS file data you provided will not open properly in either QT or MPEG Streamclip when re-wrapped to eith MOV or MP4 files by VLC. That is why I was curious as to the nature of the MP4 file created the software you previously mentioned.

     

     

    Of course, there is still the issue of the 2nd audio track (2 channel AAC) that would be needed to be added to the file for audio compatibility.  Is there an easy way to avoid transcoding and then create this 2nd audio track and then add it to the Save As'd file from Streamclip?

    If source file only contains one audio track then transcoding is maditory if you want both AC3 and AAC audio tracks. Sine is is usually easier to transcode for DD5.1 AC3 to AAC, I normally go with HandBrake here.

     

     

    Is there a Video Passthrough mode in Streamclip, such as VisualHub had previously?

    No. Even the QT Export MPEG-4 "Passthrough" option does not work in MPEG Streamclip.

     

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    iMac, Mac OS X (10.7.3), 3.4 GHz Quad Core i7, 4 GB 1333 MHz
  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:29 PM (in response to Jon Walker)

    Did you receive the MP4 file?

  • Jon Walker Level 6 Level 6 (17,520 points)
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    May 12, 2012 9:35 PM (in response to MlchaelLAX)

    I suspect that 59.94 down to 24 fps did not have the proper pull-down techniques and hence will suffer from flutter and be choppy...

    HERE is the output file. Check for yourself.

     

    /___sbsstatic___/migration-images/migration-img-not-avail.png

    iMac, Mac OS X (10.7.3), 3.4 GHz Quad Core i7, 4 GB 1333 MHz
  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:47 PM (in response to Jon Walker)

    Jon Walker wrote:

     

    I suspect that 59.94 down to 24 fps did not have the proper pull-down techniques and hence will suffer from flutter and be choppy...

    HERE is the output file. Check for yourself.

     

    /___sbsstatic___/migration-images/migration-img-not-avail.png

    Looks GREAT!  How did you accomplish the 59.94 to 24fps reduction?

     

    If I can repeat that, I can convert my 720p - 59.94fps  files to 24fps and they will run natively in the AppleTV1, which only runs 720p up to 25fps.  Above that the maximum resolution is 540p, which is what I usually transcode to for my network of family & friends that I gifted classic AppleTV1's to...

  • Jon Walker Level 6 Level 6 (17,520 points)
    Currently Being Moderated
    May 12, 2012 9:46 PM (in response to MlchaelLAX)

    How about demux the Save As'd Streamclip file and somehow create the simulcast 2 channel AAC file and then mux it all together?

     

    The idea is to AVOID transcoding with the playback power of the ATV3.

    As I previously indicated, none of the containers I created from your M2TS data couls be opened in either QT or MPEG Streamclip. That is why I want to know if your MP4 file can be opened properly in MPEG Streamclip. BTW, are you using the regular release (v1.9.2) or the current beta release?

     

    /___sbsstatic___/migration-images/migration-img-not-avail.png

    iMac, Mac OS X (10.7.3), 3.4 GHz Quad Core i7, 4 GB 1333 MHz
  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:48 PM (in response to Jon Walker)

    1.9.1

     

    you should have the email with the download link for the mp4 by now...

  • MlchaelLAX Level 4 Level 4 (1,550 points)
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    May 12, 2012 9:49 PM (in response to MlchaelLAX)

    Do you have Perian installed?

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