h264 encoding for the web have to be 422 or 420?

[marcorocchini]

Hi everyone,

I shoot with a sony pdw-f800 camera (xdcam hd 422 files, you can download from my dropbox a short example: www.dropbox.com logon into it with this credential: user: mrocchini@email.it password: centrale forlder: "public" , i have put the file C0020.MXF)

General
Complete name : d:\C0020.mxf
Format : MXF
Commercial name : XDCAM HD422
Format profile : OP-1a
Format settings : Closed / Complete
File size : 263 MiB
Duration : 36s 600ms
Overall bit rate : 60.3 Mbps
Encoded date : 2013-05-24 22:12:18.000
Writing application : SONY Opt 1.22
Writing library : SONY Opt 1.22

Video
ID : 2
Format : MPEG Video
Commercial name : XDCAM HD422
Format version : Version 2
Format profile : 4:2:2@High
Format settings, BVOP : Yes
Format settings, Matrix : Custom
Format settings, GOP : M=3, N=12
Format_Settings_Wrapping : Frame
Duration : 36s 600ms
Bit rate : 50.0 Mbps
Width : 1 920 pixels
Height : 1 080 pixels
Display aspect ratio : 16:9
Frame rate : 25.000 fps
Standard : Component
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.965
Stream size : 218 MiB (83%)
Color primaries : BT.709
Transfer characteristics : BT.709
Matrix coefficients : BT.709

Audio #1
ID : 3
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Audio #2
ID : 4
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Audio #3
ID : 5
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Audio #4
ID : 6
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Audio #5
ID : 7
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Audio #6
ID : 8
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Audio #7
ID : 9
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Audio #8
ID : 10
Format : PCM
Format settings, Endianness : Little
Format_Settings_Wrapping : Frame (AES)
Duration : 36s 600ms
Bit rate mode : Constant
Bit rate : 1 152 Kbps
Channel(s) : 1 channel
Sampling rate : 48.0 KHz
Bit depth : 24 bits
Stream size : 5.03 MiB (2%)

Other #1
ID : 1
Type : Time code
Format : MXF TC
Time code of first frame : 01:34:21:15
Time code settings : Striped

Other #2
Type : Time code
Format : SMPTE TC
Muxing mode : SDTI
Time code of first frame : 01:34:21:15



for example I would like to transcode this c0020.mxf clip for the web with x264 encoder and virtualdub.

What is the correct parameters for x264 encorder for youtube uploading and max quality?
Is not important the time request for encoding, is important the quality result.

For the virtualdub frameserve I use .. MainConcept.MXF.Decoder.v9.6.8.2473.exe in deinterlace mode, so frame to the encoder are jet deinterlaced

I have to set it for YUV422 output or 420?

I have set virtualdub in VIDEO-->FULL PROCESS MODE + 422YCbCr (UYVY) OUTPUT and the encoder as .jpg attached

Is it correct?

Thanks to all

[poisondeathray]

Youtube only supports 4:2:0 (it re-encodes to 4:2:0, even if you send it 4:2:2 , or 4:4:4 YUV , or RGB) , so it doesn't make sense to use anything else

But if you do your own hosting, flash actually supports 8bit 4:2:2 AVC

[marcorocchini]

hi poison, and vimeo it also in 422 works?

kindly: I have another a question for you:
do you know FFMBC? because I would like to trascode from .mxf to mpeg2Iframe of my matrox codecs that I have previously installed on my system, is it possible for FFPEG or FFMBC (they are slightly similary) use and external codec?

FFMBC -i C0020.mxf -vcodec mpeg2video ... ?

thank you

[poisondeathray]

vimeo is the same as youtube (re-encodes to 4:2:0 for the version viewed in the browser) , but if you have a "pro" account you can make the original uploaded file downloadable


You cannot use the same matrox codecs with ffmbc or ffmpeg (The matrox codecs are VFW codecs, and only work in AVI or VFW systems) . But you can use "generic" MPEG2 I frame with ffmbc/ffmpeg

-vcodec mpeg2video

-g 1 for intra (I frame only)

-qscale , or -q:v for quality (lower is better, but larger filesizes eg.. -qscale 1)

-flags +ilme+ildct for interlaced encoding

it used to be -tff for top field first, or sometimes -top 1 (the syntax changes between versions, sometimes slightly different for ffmpeg than ffmbc, or even different versions of ffmpeg - you have to try them out)

-pix_fmt yuv422p for 4:2:2

[smrpix]

Marco, what are you hoping to acheive in the long run?

Your HDCam files are excellent for editing in any pro NLE -- Adobe Premiere, Vegas Pro, Avid -- as they are.

Additionally any of those NLEs can export a YouTube ready file. It is an unusual workflow to transcode this sort of file directly. (It can be done, with ffmpeg or ffmbc as you've noted.) Additionally you have the issue of the 8 audio tracks. YouTube will accept 5.1 stereo, but that's not what you have here.)

Everything PDR has said is correct and accurate -- but again, I'm wondering where you're going with this and what your ultimate goal is.

[marcorocchini]

thanks poison,
can i desperate tray this way?

http://comments.gmane.org/gmane.comp.video.ffmpeg.devel/111014

Add M701 fourcc to riff.c


but I don't know in wich way is possible add the 111014-001.bin to riif.c (riff.c of the libavcodec?)

and try with https://www.videohelp.com/tools/ffmpeg

[marcorocchini]

ps. I have download ffmpeg-1.1.5.tar.bz2
there is a folder libavformat and a riff.c file
but I don't know how to add the 111014-001.bin onto the riff.c file
this will transform FFMPEG in a matrox m701 encoder?

[marcorocchini]

ps.ps

[marcorocchini]

in attachment

[poisondeathray]

I don' t know

You can try eyeframe converter
https://www.videohelp.com/tools/EyeFrame-Converter
http://eyeframe.tk/

[poisondeathray]

BTW the patch 111014-001.bin looks like fourcc's and codec id's

(It's for identifying matrox codecs, not an encoder; and I'm pretty sure it's already merged into the main trunk)

[marcorocchini]

ah, i understand

possibly I was preferred to encode by command line. Not gui, howver I have seen the eyeframe but seems I don't find for matrox-codecs encoding (maybe in a non-free version of eyeframe?)

I think the eyeframe uses FFMBC

[tin2tin]

The Matrox preset in EFC is 'LW FREE Mpeg2 I-Frame HD - Proxy Quarter Size - Short Clips', but for longer clips 1GB+ the audio fails.

Click on the pen button next to the preset selection box to open/edit the command line.

If you want to make a file for upload you properly need to export to mp4.

All those audio tracks might cause problems for you and the command line needs to be changed to use them. Look into the ffmbc/ffmpeg docs for more info.