Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Video Encoding > MPEG-2 Encoding

Reply
 
Thread Tools Search this Thread Display Modes
Old 12th June 2018, 19:54   #1  |  Link
FranceBB
Broadcast Encoder
 
FranceBB's Avatar
 
Join Date: Nov 2013
Location: Germany
Posts: 669
MpegMapperSegmented::CalcDiskToDisplayOffset (XDCAM AVID)

Hi,
with the latest development version of ffmpeg (ffmpeg-20180611-8c20ea8), it seems that some files are not correctly muxed in .MXF.
I’ve used the following command line:

Code:
 C:\Encoding\ffmpeg.exe -i "%%~nxF" -pix_fmt yuv422p -vcodec mpeg2video -s 1920:1080 -aspect 16:9 -vf setfield=tff -flags +ildct+ilme -r 25 -b:v 50000k -minrate 50000k -maxrate 50000k -bufsize 36408333 -acodec pcm_s24le -ar 48000 -g 12 -bf 2 -profile:v 0 -level:v 2 -color_range 1 -color_primaries 1 -color_trc 1 -colorspace 1 -f mxf "C:\Encoding\%%~nF encoded.mxf"
The original video is an H.264 profile High, level 5.1, ref1, 3840x2160, progressive 8bit muxed in an .mp4. Nothing weird.
The encoding starts but at the end I get:



The encoded video plays fine on VLC, MPC-HP and PotPlayer, however if I import it into AVID Media Composer or if I link it it displays an error. If I try to transcode the original file in AVID, it works flawlessly, which is weird.
I've also tried to pipe Avisynth to ffmpeg and encode, but it didin't solve the problem:

Code:
video=FFVideoSource("test.mp4")
audiook=FFAudioSource("test.mp4")
audio=MergeChannels(audiook, audiook, audiook, audiook)
AudioDub(video, audio)

ResampleAudio(48000)
Normalize(0.20)
ConvertAudioTo24bit()
Limiter(min_luma=16, max_luma=235, min_chroma=16, max_chroma=240)

ConvertFPS(50)
Spline64ResizeMT(1920, 1080)
assumeTFF()
separatefields()
selectevery(4,0,3)
weave()
Converttoyv16(interlaced=true)
Even after using Avisynth and encoding with ffmpeg, AVID prompted me to this error:



This is not the first time I have to deal with this. It's odd.
I managed to encode it already, but I decided to report this here 'cause it's odd.

Original File + Encoded File: https://we.tl/A9Cgvr79zn

Is it ffmpeg? Is it AVID? Who's guilty?
__________________
Broadcast Encoder
Avisynth memes: 1 - 2 - 3
Videotek - Audacity XP

Last edited by FranceBB; 12th June 2018 at 19:57.
FranceBB is offline   Reply With Quote
Old 18th April 2019, 23:46   #2  |  Link
kolak
Registered User
 
Join Date: Nov 2004
Location: UK
Posts: 2,412
It's rather ffmpeg. It's not a "precise" tool and sometimes it doesn't follow some specs etc. AVID from other hand requires things to be precise, sometimes even too much
This info about missing frame doesn't look "good" in ffmpeg.

Last edited by kolak; 18th April 2019 at 23:48.
kolak is offline   Reply With Quote
Old 25th April 2019, 00:13   #3  |  Link
FranceBB
Broadcast Encoder
 
FranceBB's Avatar
 
Join Date: Nov 2013
Location: Germany
Posts: 669
Quote:
Originally Posted by kolak View Post
It's rather ffmpeg. It's not a "precise" tool and sometimes it doesn't follow some specs etc. AVID from other hand requires things to be precise, sometimes even too much
This info about missing frame doesn't look "good" in ffmpeg.
Yep... Later on I found out that it's ffmpeg... Remuxing the MXF with BBC BMX Transwrap and solves the problem most of the time, so it's definitely ffmpeg.
It's sad 'cause the only other open source encoder capable to encode in MPEG-2 that I know is x262, but it does have its own issues...
Last but not least, there's ffmbc, but it's not the panacea to each and every issue either...
__________________
Broadcast Encoder
Avisynth memes: 1 - 2 - 3
Videotek - Audacity XP
FranceBB is offline   Reply With Quote
Old 25th April 2019, 17:22   #4  |  Link
kolak
Registered User
 
Join Date: Nov 2004
Location: UK
Posts: 2,412
Is ffmbc maintained?
Looks like binaries are so outdated.
kolak is offline   Reply With Quote
Old 5th May 2019, 13:03   #5  |  Link
FranceBB
Broadcast Encoder
 
FranceBB's Avatar
 
Join Date: Nov 2013
Location: Germany
Posts: 669
Quote:
Originally Posted by kolak View Post
Is ffmbc maintained?
Looks like binaries are so outdated.
It's not, that's why I was using ffmpeg.
Anyway, since I only need an encoder as I pipe the A/V stream from Avisynth, I was trying ffmbc as well 'cause even if it's outdated and it doesn't have new decoders, I only need to encode an uncompressed audio/video stream.
Besides, I don't think MPEG-2 encoders are updated frequently (or at all) nowadays...
__________________
Broadcast Encoder
Avisynth memes: 1 - 2 - 3
Videotek - Audacity XP
FranceBB is offline   Reply With Quote
Old 5th May 2019, 13:40   #6  |  Link
richardpl
Registered User
 
Join Date: Jan 2012
Posts: 97
This is build from 2018, so it is not latest.
richardpl is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 19:48.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.