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bruce_s01
PostPosted: Mon Jan 15, 2007 9:11 pm 
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Joined: Tue Aug 08, 2006 7:08 pm
Posts: 561
Location: UK
Before carrying this out, I followed Cecils instructions here along with IEnigmusIs' instructions about copying nuvexport to /usr/local/bin and nuvexportrc.

I carried out a Manual scheduled recording* using the following settings for the default profile:
Width: 352 Height 576
Codec: MPEG4
Bitrate:3000
Max Quality: 2
Min Quality: 14
Max Diff between frames: 3
Scale bitrate for frame size
All other options are off.

Codec:MP3
Sampling rate:32000
MP3 Quality: 4
Volume (%):91

The recording was scheduled for 30minutes.

The MythArchive settings are as follows:
Video format: PAL
Always encode to ac3 is not set.
Always use Mythtranscode
Use FIFOs
Main Menu Aspect ratio: 4:3
Chapter Aspect Ratio: Video
All the commands are set to the correct commands, eg. ffmpeg = ffmpeg.

The file was selected OK, then selected Export Video Files ->Create DVD.
A single layer DVD was selected along with write to ISO.
The item was selected, then the Compact theme was selected.
Encoder Profile SP (2hrs), Original size is given as 439MB, New Size 0KB.

The DVD creation commences then fails, the mythburn.log was as follows:
Code:
mythburn.py (0.1.20061201-1) starting up...
Process priority 8
script path:/usr/share/mythtv/mytharchive/scripts
myth share path:/usr/share/mythtv
passed job file: /myth/tmp/config/mydata.xml
passed progress log file: /myth/tmp/logs/progress.log
mythburn.py (0.1.20061201-1) starting up...
Found 1 CPUs
Obtaining MythTV settings from MySQL database for hostname homenet-pvr1
Processing Mythburn job number 1.
Options - mediatype = 0, doburn = 0, createiso = 1, erasedvdrw = 0
          savefilename = ''
Looking for: /usr/share/mythtv/mytharchive/themes/Compact/theme.xml
Loading font 0, /usr/share/mythtv/FreeSans.ttf size 23
Loading font 1, /usr/share/mythtv/FreeSans.ttf size 18
Loading font 2, /usr/share/mythtv/FreeSans.ttf size 16
wantIntro: 1, wantMainMenu: 1, wantChapterMenu:0, wantDetailsPage: 0
Final DVD Video format will be pal
There are 1 files to process
Pre-processing file '1004_20070116000500.nuv' of type 'recording'
          Test13 (Manual Record)
2007-01-16 00:59:21.181 Opening /myth/tv/1004_20070116000500.nuv
Input #0, nuv, from '/myth/tv/1004_20070116000500.nuv':
  Duration: 00:43:32.4, start: 0.000000, bitrate: 1411 kb/s
  Stream #0.0: Video: mpeg4, yuv420p, 352x576,  0.04 fps(r)
  Stream #0.1: Audio: mp3, 32000 Hz, stereo, 1411 kb/s
0: start_time: 0.000 duration: 2.612
1: start_time: 0.000 duration: 2.612
stream: start_time: 0.000 duration: 2612.480 bitrate=1411 kb/s
2007-01-16 00:59:21.203 duration = 2612
streaminfo.xml :-
<?xml version="1.0" ?><!DOCTYPE FILEINFO><file duration="2612" filename="/myth/tv/1004_20070116000500.nuv" type="nuv">   
        <streams count="2">       
                <video aspectratio="1.33333" bitrate="0" codec="mpeg4" ffmpegindex="0" fps="0.04" height="576" id="0" streamindex="0" width="352"/>       
                <audio bitrate="1411200" channels="2" codec="mp3" ffmpegindex="1" id="1" language="N/A" samplerate="32000" streamindex="1"/>       
        </streams>   
</file>
Video resolution is 352 by 576
*************************************************************
Processing file 1004_20070116000500.nuv of type recording
*************************************************************
File type is 'nuv'
Video codec is 'mpeg4'
2007-01-16 00:59:22.288 Opening /myth/tv/1004_20070116000500.nuv
Input #0, nuv, from '/myth/tv/1004_20070116000500.nuv':
  Duration: 00:43:32.4, start: 0.000000, bitrate: 1411 kb/s
  Stream #0.0: Video: mpeg4, yuv420p, 352x576,  0.04 fps(r)
  Stream #0.1: Audio: mp3, 32000 Hz, stereo, 1411 kb/s
0: start_time: 0.000 duration: 2.612
1: start_time: 0.000 duration: 2.612
stream: start_time: 0.000 duration: 2612.480 bitrate=1411 kb/s
2007-01-16 00:59:22.309 duration = 2612
streaminfo.xml :-
<?xml version="1.0" ?><!DOCTYPE FILEINFO><file duration="2612" filename="/myth/tv/1004_20070116000500.nuv" type="nuv">   
        <streams count="2">       
                <video aspectratio="1.33333" bitrate="0" codec="mpeg4" ffmpegindex="0" fps="0.04" height="576" id="0" streamindex="0" width="352"/>       
                <audio bitrate="1411200" channels="2" codec="mp3" ffmpegindex="1" id="1" language="N/A" samplerate="32000" streamindex="1"/>       
        </streams>   
</file>
Preferred audio languages eng and eng
Video id: 0x0, Audio1: [1] 0x1 (MP3, N/A), Audio2: [-1] - 0x-1 (N/A, N/A)
Aspect ratio is 4:3
Re-encoding audio and video from nuv file
Encoding profile (SP) found
mythtranscode started PID = 3828
Waiting for mythtranscode to create the fifos
2007-01-16 00:59:23.122 Using runtime prefix = /usr
2007-01-16 00:59:23.204 New DB connection, total: 1
2007-01-16 00:59:23.234 Enabled verbose msgs: important
2007-01-16 00:59:23.244 New DB connection, total: 2
Waiting for mythtranscode to create the fifos
2007-01-16 00:59:23.396 Using protocol version 31
2007-01-16 00:59:23.794 mythtranscode: 0% Completed @ 0 fps.
Running ffmpeg
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --prefix=/usr --libdir=${prefix}/lib --shlibdir=${prefix}/lib --incdir=${prefix}/include/ffmpeg --enable-shared --enable-mp3lame --enable-gpl --enable-faad --mandir=${prefix}/share/man --enable-vorbis --enable-pthreads --enable-faac --enable-xvid --enable-dts --enable-amr_nb --enable-amr_wb --enable-pp --enable-libogg --enable-libgsm --enable-x264 --enable-a52 --extra-cflags=-Wall -g -fPIC -DPIC
  libavutil version: 49.0.0
  libavcodec version: 51.11.0
  libavformat version: 50.5.0
  built on Oct 14 2006 21:20:45, gcc: 4.1.2 20061007 (prerelease) (Debian 4.1.1-16)
Input #0, s16le, from '/myth/tmp/work/1/audout':
  Duration: N/A, bitrate: N/A
  Stream #0.0: Audio: pcm_s16le, 32000 Hz, stereo, 1024 kb/s
Input #1, rawvideo, from '/myth/tmp/work/1/vidout':
  Duration: N/A, bitrate: N/A
  Stream #1.0: Video: rawvideo, yuv420p, 352x576,  0.04 fps(r)
Output #0, dvd, to '/myth/tmp/work/1/newfile2.mpg':
  Stream #0.0: Video: mpeg2video, yuv420p, 720x576, q=5-31, 4771 kb/s,  5.00 fps(c)
  Stream #0.1: Audio: ac3, 48000 Hz, stereo, 192 kb/s
Stream mapping:
  Stream #1.0 -> #0.0
  Stream #0.0 -> #0.1
[mpeg2video @ 0xb7e8eee8]MPEG1/2 does not support 5/1 fps
Error while opening codec for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
************************************************************
ERROR: Failed while running ffmpeg to re-encode video.
Command was ffmpeg -y -f s16le -ar 32000 -ac 2 -i /myth/tmp/work/1/audout -f rawvideo -pix_fmt yuv420p -s 352x576 -aspect 1.33333 -r 0.04 -i /myth/tmp/work/1/vidout -aspect 1.33333 -r 0.04 -s 720x576 -b 4771k -vcodec mpeg2video -qmin 5 -ab 192 -ar 48000 -acodec ac3 -f dvd "/myth/tmp/work/1/newfile2.mpg"
************************************************************

Terminated


I tried rerunning with FIFOs disabled, there appears to be no change.
I'm not familiar with this, so I don't know where to start.

Bruce S.

*Using this system:PIII 650MHz FC+Slocket, Gigabyte GA-6BXD, 768Mb, Dual channel ATA-100 PCI ATA HBA, 80Gb PATA HDD,
LG GDR8161B DVD-ROM, LG GCE-8520B CD-RW, XFX GeForce FX5200, Hauppauge WinTV Theater, Intel Gigabit Ethernet, Creative Labs SB Live! KM R5E50.

Edited to correct spelling in subject

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Last edited by bruce_s01 on Sat Jan 20, 2007 3:03 pm, edited 1 time in total.
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bruce_s01
 Post subject:
PostPosted: Sat Jan 20, 2007 7:27 am 
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Joined: Tue Aug 08, 2006 7:08 pm
Posts: 561
Location: UK
Is there anything else I need to document to help to find a solution?

I forgot to ask as well, has anyone got the DVD creation to work with .nuv in R5E50, what were your settings?

Bruce S.

ETA:Second question.

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bruce_s01
 Post subject:
PostPosted: Sun Jan 21, 2007 7:58 am 
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Joined: Tue Aug 08, 2006 7:08 pm
Posts: 561
Location: UK
I decided to see what would happen if I changed source codec, so I switched over RTjepg, so setting to:

Size=352x576
Quality=170
Luma=0
Chroma=0

MP3 Rate=32000
Quality=4
Volume=90

The recording was scheduled for 20minutes.

The MythArchive settings are as follows:
Video format: PAL
Always encode to ac3 is not set.
Always use Mythtranscode
Don't Use FIFOs
Main Menu Aspect ratio: 4:3
Chapter Aspect Ratio: Video

The file was selected OK, then selected Export Video Files ->Create DVD.
A single layer DVD was selected along with write to ISO.
The item was selected, then the Compact theme was selected.
Encoder Profile SP (2hrs)

The DVD creation commences than fails, but it gets much further than previously.
Code:
DVDAuthor::spumux, version 0.6.11.
Build options: gnugetopt magick iconv freetype fribidi
Send bugs to <dvdauthor-users@lists.sourceforge.net>

INFO: Locale=C
INFO: Converting filenames to ANSI_X3.4-1968
STAT: 0:00:00.000^MINFO: Picture /myth/tmp/work/backgroundmask-1.png had 2 color
s
INFO: Picture /myth/tmp/work/backgroundmask-1.png had 2 colors
INFO: Constructing blank img
INFO: Pickbuttongroups, success with 1 groups, useimg=1
INFO: Found EOF in .sub file.
INFO: Max_sub_size=348
WARN:  Read 0, expected 4
INFO: 1 subtitles added, 0 subtitles skipped, stream: 32, offset: 0.18

Statistics:
- Processed 0 subtitles.
- The longest display line had -1 characters.
- The maximum number of displayed lines was 0.
- The normal display height of the font arial.ttf was 0.
- The bottom display height of the font arial.ttf was 0.
- The biggest subtitle box had 348 bytes.
Menu items per page 6
Creating DVD XML file for dvd author
Menu page 1
aspect ratio is: 1.33333
aspect ratio is: 1.33333
Total size of video files, before multiplexing, is 404 Mbytes, audio is 27 MByte
s, menus are 1 MBytes.
Video will fit onto DVD. 4029.8 MBytes of space remaining on recordable DVD.
Multiplexing MPEG stream to /myth/tmp/work/1/final.mpg
Available streams - video and one audio stream
++ WARN: [mplex] Stream e0: data will arrive too late sent(SCR)=32683154 require
d(DTS)=32683019
++ WARN: [mplex] Video e0: buf=  57873 frame=009075 sector=00072105
++ WARN: [mplex] Audio bd: buf=   1725 frame=011345 sector=00004322
**ERROR: [mplex] MUX STATUS: Frame data under-runs detected!
************************************************************
ERROR: mplex failed with result 1
************************************************************

Terminated


So this works but fails at the remultiplexing
So I enable FIFOs and recommence the process results in (from progress.log) :
Code:
 2007-01-21 12:10:35 mythburn.py (0.1.20061201-1) starting up...
2007-01-21 12:10:35 Found 1 CPUs
2007-01-21 12:10:35 Obtaining MythTV settings from MySQL database for hostname h
omenet-pvr1
2007-01-21 12:10:36 Processing Mythburn job number 1.
2007-01-21 12:10:36 Options - mediatype = 0, doburn = 0, createiso = 1, erasedvd
rw = 0
2007-01-21 12:10:36           savefilename = ''
2007-01-21 12:10:36 Looking for: /usr/share/mythtv/mytharchive/themes/Compact/th
eme.xml
2007-01-21 12:10:36 Loading font 0, /usr/share/mythtv/FreeSans.ttf size 23
2007-01-21 12:10:36 Loading font 1, /usr/share/mythtv/FreeSans.ttf size 18
2007-01-21 12:10:36 Loading font 2, /usr/share/mythtv/FreeSans.ttf size 16
2007-01-21 12:10:36 wantIntro: 1, wantMainMenu: 1, wantChapterMenu:0, wantDetail
sPage: 0
2007-01-21 12:10:36 Final DVD Video format will be pal
2007-01-21 12:10:36 There are 1 files to process
2007-01-21 12:10:38 Pre-processing file '1004_20070121030000.nuv' of type 'recor
ding'
2007-01-21 12:10:38           Test19 (Manual Record)
2007-01-21 12:10:39 streaminfo.xml :-
<?xml version="1.0" ?><!DOCTYPE FILEINFO><file duration="3396" filename="/myth/t
v/1004_20070121030000.nuv" type="nuv">
        <streams count="2">
                <video aspectratio="1.33333" bitrate="0" codec="RJPG / 0x47504A5
2" ffmpegindex="0" fps="25" height="576" id="0" streamindex="0" width="352"/>

                <audio bitrate="1411200" channels="2" codec="mp3" ffmpegindex="1
" id="1" language="N/A" samplerate="32000" streamindex="1"/>
        </streams>
</file>
2007-01-21 12:10:39 Video resolution is 352 by 576
2007-01-21 12:10:39 ************************************************************
*
2007-01-21 12:10:39 Processing file 1004_20070121030000.nuv of type recording
2007-01-21 12:10:39 ************************************************************
*
2007-01-21 12:10:39 File type is 'nuv'
2007-01-21 12:10:39 Video codec is 'RJPG / 0x47504A52'
2007-01-21 12:10:40 streaminfo.xml :-
<?xml version="1.0" ?><!DOCTYPE FILEINFO><file duration="3396" filename="/myth/t
v/1004_20070121030000.nuv" type="nuv">
        <streams count="2">
                <video aspectratio="1.33333" bitrate="0" codec="RJPG / 0x47504A5
2" ffmpegindex="0" fps="25" height="576" id="0" streamindex="0" width="352"/>

                <audio bitrate="1411200" channels="2" codec="mp3" ffmpegindex="1
" id="1" language="N/A" samplerate="32000" streamindex="1"/>
        </streams>
</file>
2007-01-21 12:10:40 Preferred audio languages eng and eng
2007-01-21 12:10:40 Video id: 0x0, Audio1: [1] 0x1 (MP3, N/A), Audio2: [-1] - 0x
-1 (N/A, N/A)
2007-01-21 12:10:40 Aspect ratio is 4:3
2007-01-21 12:10:40 Re-encoding audio and video from nuv file
2007-01-21 12:10:40 Encoding profile (SP) found
2007-01-21 12:10:40 mythtranscode started PID = 4994
2007-01-21 12:10:40 Waiting for mythtranscode to create the fifos
2007-01-21 12:10:41 Waiting for mythtranscode to create the fifos
2007-01-21 12:10:42 Running ffmpeg
2007-01-21 13:09:16 streaminfo.xml :-
?xml version="1.0" ?><!DOCTYPE FILEINFO><file duration="1196" filename="/myth/t
mp/work/1/newfile2.mpg" type="mpeg">
        <streams count="2">
                <video aspectratio="1.33333" bitrate="104857200" codec="mpeg2vid
eo" ffmpegindex="0" fps="25" height="576" id="480" streamindex="0" width="720"/>

                <audio bitrate="192000" channels="2" codec="ac3" ffmpegindex="1"
 id="128" language="N/A" samplerate="48000" streamindex="1"/>
        </streams>
</file>
2007-01-21 13:09:16 Preferred audio languages eng and eng
2007-01-21 13:09:16 Video id: 0x1e0, Audio1: [1] 0x80 (AC3, N/A), Audio2: [-1] -
 0x-1 (N/A, N/A)
2007-01-21 13:09:16 Splitting MPEG stream into audio and video parts
2007-01-21 13:09:16 Running: mythreplex --demux  --fix_sync -o /myth/tmp/work/1/
stream -v 224 -c 128 "/myth/tmp/work/1/newfile2.mpg"
2007-01-21 13:11:53 Audio is already in ac3 format
2007-01-21 13:11:53 ************************************************************
*
2007-01-21 13:11:53 Finished processing file 1004_20070121030000.nuv
2007-01-21 13:11:53 ************************************************************
*
2007-01-21 13:11:53 Menu items per page 6
2007-01-21 13:11:53 Background image file is /usr/share/mythtv/mytharchive/theme
s/Compact/Compact-Background.png
2007-01-21 13:11:53 Music is menumusic.ac3, length is 15 seconds
2007-01-21 13:11:53 Creating DVD menus
2007-01-21 13:11:53 Menu page 1
2007-01-21 13:12:04 Encoding Menu Page 1 using aspect ratio '4:3'
2007-01-21 13:13:49 Menu items per page 6
2007-01-21 13:13:49 Creating DVD XML file for dvd author
2007-01-21 13:13:49 Menu page 1
2007-01-21 13:13:49 aspect ratio is: 1.33333
2007-01-21 13:13:49 aspect ratio is: 1.33333
2007-01-21 13:13:49 Total size of video files, before multiplexing, is 437 Mbyte
s, audio is 27 MBytes, menus are 1 MBytes.
2007-01-21 13:13:49 Video will fit onto DVD. 3995.15 MBytes of space remaining o
n recordable DVD.
2007-01-21 13:13:49 Multiplexing MPEG stream to /myth/tmp/work/1/final.mpg
2007-01-21 13:13:49 Available streams - video and one audio stream
2007-01-21 13:13:49 Multiplex started PID=5084
2007-01-21 13:13:49 Starting dvdauthor
2007-01-21 13:16:17 Finished  dvdauthor
2007-01-21 13:16:17 Creating ISO image
2007-01-21 13:17:35 Finished creating ISO image
2007-01-21 13:17:35 Finished processing jobs!!!


So what can be seen that the frame rate is correctly identified in the source RTjpeg .nuv file as compared with the MPEG4 .nuv, apparently there is something wrong in the app that identifies the frame rate in the MPEG4 .nuv file, or the app that produced it in the first place.

So it appears there is a workaround for this problem, if you are using a card which does not produce MPEG2 files:
Capture in RTjpeg
Use FIFOs.

Bruce S.

_________________
Updated 2019/10/26: AthlonII X2 265 Gigabyte GA-970A-DS3P
16Gb PC 1866 DDR3, 500GB+2TB+4TB SATA HDD,
SATA DVD-RW Asus DRW-24D5MT , NVIDIA GeForce GT1080
Hauppauage Nova-T 500, Nova-T LinHes R8.6.1
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bruce_s01
 Post subject:
PostPosted: Wed Jan 24, 2007 7:16 pm 
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Posts: 561
Location: UK
Further updates, trying out various resolutions and quality settings.
There seems to be a huge difference in file size capturing at 352x576 and 720x576 at the same quality setting (for 20mins 0.56GB vs 13.4GB). Nevermind on playback on DVD, when you fast forwarded, sound and vision got out of sync, it was OK before the fast forward, but after, the sound led the video by a couple of seconds.
I managed to capture 20 minutes using MPEG4 and I was able to get it passed through ffmpeg as the correct frame rate was set (25 fps).

There does seem to be something screwy with the initial file detection and parsing to get the header data from the file (possibly MythTV db as well?) before the actual processing.

Bruce S.

_________________
Updated 2019/10/26: AthlonII X2 265 Gigabyte GA-970A-DS3P
16Gb PC 1866 DDR3, 500GB+2TB+4TB SATA HDD,
SATA DVD-RW Asus DRW-24D5MT , NVIDIA GeForce GT1080
Hauppauage Nova-T 500, Nova-T LinHes R8.6.1
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bruce_s01
 Post subject:
PostPosted: Wed Jan 31, 2007 9:40 am 
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Posts: 561
Location: UK
Just as an update, looking at some of the output generated, I think there's something else going on here.
My suspicion of why the dodgy frame rate info is being passed to ffmpeg is that the system is not fast enough, to capture so .nuv file is being marked with a strange frame rate.

It seems that 5E50 and/or Myth 0.20 does seem to have upped the minimum system requirements, even for a record only system.

Bruce S.

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16Gb PC 1866 DDR3, 500GB+2TB+4TB SATA HDD,
SATA DVD-RW Asus DRW-24D5MT , NVIDIA GeForce GT1080
Hauppauage Nova-T 500, Nova-T LinHes R8.6.1
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alien
 Post subject:
PostPosted: Thu Feb 01, 2007 1:52 am 
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Joined: Mon Jun 21, 2004 5:28 am
Posts: 700
Location: Germany
I've been having a lot of problems with the demux/replex stages of mytharchive. Since I am working with mpeg2 files, this isn't really necessary. Rather than do some heavy script editing, after building a DVD, I copy the original mpeg2 files to <mytharchiveWorkDir>/work/[1-9]/final.mpeg and then re-run dvdauthor (in the work dir dvdauthor -x dvdauthor.xml).

If you can transcode to mpeg2 (I think mythtranscode command line might do it), you might try this to fix some of the problems.

Note: Problems I'm seeing are:

Audio out of sync
Audio tracks lost
16:9 tagged as 4:3
Audio tags all N/A

MPEG files are PAL, from either my capture cards, or DV files converted to MPEG with kino.

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bruce_s01
 Post subject:
PostPosted: Mon Feb 05, 2007 1:48 pm 
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Posts: 561
Location: UK
Just to update a bit more. putting the card+HDD in a different but faster system I've found that the frame rate passed to ffmpeg is set to 0.04 when capturing from the tuner input.
So it seems I've found where that was coming from.
I noticed when ramping up the frame rate and capturing from the composite input, I started getting weird frame rate numbers such as 31.something and 21.something (the "something" respresents the figures, of course).

Bruce S.

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Updated 2019/10/26: AthlonII X2 265 Gigabyte GA-970A-DS3P
16Gb PC 1866 DDR3, 500GB+2TB+4TB SATA HDD,
SATA DVD-RW Asus DRW-24D5MT , NVIDIA GeForce GT1080
Hauppauage Nova-T 500, Nova-T LinHes R8.6.1
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cliffsjunk
 Post subject: Solution (hack) found!!!
PostPosted: Fri Jul 27, 2007 9:57 pm 
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Joined: Fri Sep 15, 2006 12:16 pm
Posts: 292
(I edited this post on 2007-10-22 to include new information)

It appears that "manual recordings" are indeed the
source of the re-createable problem, but I have also
experienced problems with a few normal recordings. Two things
are required to get your system to work:

First: Edit /usr/share/mythtv/mytharchive/scripts/mythburn.py
with your favorite editor and search for:
Code:
    fps = video.attributes["fps"].value

I have found that this fps value can also sometimes be
too high (not just too low) which causes other issues, including
audio sync issues and refusal to use more than 3% of the
CPU while creating the DVD (it takes days instead of hours to
create a DVD). I now recommend adding this line after the
"fps = video.attributes["fps"].value" line. The line you found is
left there so all you have to do is delete what you added to
put it back the way it was:
Code:
    """Cliff added this to fix bad fps values in manual recordings"""
    fps = "29.97"

I originally recommended the following to fix the low values, but
no longer recommend it because I have found cases of high
values needing to be fixed:
Code:
    """Cliff added this to fix bad fps values in manual recordings"""
    """This is no longer the recommended fix"""
    if float(fps) < 10.0:
        fps = "29.97"

Second: If you use the cutlist you must have a cut (at
least a very short one) at the very beginning of the video.

- This is not the perfect fix as it does not address the cause
of the issue.
- This will cause all recordings/videos to be treated as 29.97
(NTSC)
- Those outside the USA will probably need to use or "23.976"
or "25.00" or some other strange value instead of "29.97"

(Additional discussion)
I had the problem too... and same result after applying
Cecil's instructions. and same result after applying
IEnigmusIs' patch to that.

The problem may be that the calculated video duration / fps
/ bitrates are wrong. For my video, the duration should be
1:50:00 but it is 14:48:25. The video bitrate is apparently
unknown as the combined bitrate of 1411 is the same as the
audio bit rate taken alone. The video frame rate of 0.03
(and 5 fps in another place) is way off too.

Maybe some of this is causing a miscalculation resulting in
the 5 frames per second frame rate complained about in the
error message in the mythburn.log

FYI:
- I encode directly to MPEG4 and do not transcode.
- I have tweaked my encoder quality way up (0-2).
- I increased my encoder resolution to 640x480.
- I increased my encoder bit rate to 5000.
- Scale bitrate for frame size is ON
- Enable high-quality encoding is ON
- Enable 4MV encoding is ON
- Enable interlaced DCT encoding is OFF
- Enable interlaced moti(on ...) is OFF
- My MythArchive settings are completely stock as I
recall.
- This was from a manual record, but I don't have
reason to suspect that. <edit> This apparently was
exactly the problem </edit>
- I recall not having this problem with a normal recording
under R5E50 and on this hardware.
- The chmod errors at the end of the log are probably
because I created some test files in that directory
when logged in as root.

R5F1 upgraded from R5E50. I also had a problem in R5F27.
Older Intel Dual core CPU at 3.0 ghz. 512meg RAM.

Cliff

Code:
*** Here is my mythburn.log (long lines manually wrapped) ***

mythburn.py (0.1.20070428-1.fixes) starting up...
Process priority 8
script path:/usr/share/mythtv/mytharchive/scripts
myth share path:/usr/share/mythtv
passed job file: /myth/tmp/config/mydata.xml
passed progress log file: /myth/tmp/logs/progress.log
mythburn.py (0.1.20070428-1.fixes) starting up...
Found 2 CPUs
Obtaining MythTV settings from MySQL database for hostname mythtv2
temppath: /myth/tmp/work
logpath:  /myth/tmp/logs
Processing Mythburn job number 1.
Options - mediatype = 1, doburn = 1, createiso = 1, erasedvdrw = 0
          savefilename = ''
Looking for: /usr/share/mythtv/mytharchive/themes/MythCenter/theme.xml
Loading font 0, /usr/share/mythtv/FreeSans.ttf size 19
Loading font 1, /usr/share/mythtv/FreeSans.ttf size 15
Loading font 2, /usr/share/mythtv/FreeSans.ttf size 13
wantIntro: 1, wantMainMenu: 1, wantChapterMenu:1, wantDetailsPage: 0
Final DVD Video format will be ntsc
There are 1 files to process
Pre-processing file '11416_20070724190000.nuv' of type 'recording'
2007-07-27 17:48:26.749 Opening /myth/tv/11416_20070724190000.nuv
Input #0, nuv, from '/myth/tv/11416_20070724190000.nuv':
  Duration: 14:48:25.5, start: 0.000000, bitrate: 1411 kb/s
  Stream #0.0: Video: mpeg4, yuv420p, 640x480,  0.03 fps(r)
  Stream #0.1: Audio: mp3, 44100 Hz, stereo, 1411 kb/s
0: start_time: 0.000 duration: 53.306
1: start_time: 0.000 duration: 53.306
stream: start_time: 0.000 duration: 53305.588 bitrate=1411 kb/s
2007-07-27 17:48:26.755 duration = 53305
streaminfo.xml :-
<?xml version="1.0" ?><!DOCTYPE FILEINFO><file duration="1765" \
filename="/myth/tv/11416_20070724190000.nuv" type="nuv">   
    <streams count="2">       
        <video aspectratio="1.33333" bitrate="0" codec="mpeg4" \
        ffmpegindex="0" fps="0.0333667" height="480" id="0" \
        start_time="0.0" streamindex="0" width="640"/>       
        <audio bitrate="1411200" channels="2" codec="mp3" \
        ffmpegindex="1" id="1" language="N/A" samplerate="44100" \
        start_time="0.0" streamindex="1"/>       
    </streams>   
</file>
          Kiki's Delivery Service (Manual Record)
Video resolution is 640 by 480
*************************************************************
Processing file 11416_20070724190000.nuv of type recording
*************************************************************
File type is 'nuv'
Video codec is 'mpeg4'
2007-07-27 17:48:27.006 Opening /myth/tv/11416_20070724190000.nuv
Input #0, nuv, from '/myth/tv/11416_20070724190000.nuv':
  Duration: 14:48:25.5, start: 0.000000, bitrate: 1411 kb/s
  Stream #0.0: Video: mpeg4, yuv420p, 640x480,  0.03 fps(r)
  Stream #0.1: Audio: mp3, 44100 Hz, stereo, 1411 kb/s
0: start_time: 0.000 duration: 53.306
1: start_time: 0.000 duration: 53.306
stream: start_time: 0.000 duration: 53305.588 bitrate=1411 kb/s
2007-07-27 17:48:27.012 duration = 53305
streaminfo.xml :-
<?xml version="1.0" ?><!DOCTYPE FILEINFO><file duration="1765" \
filename="/myth/tv/11416_20070724190000.nuv" type="nuv">   
    <streams count="2">       
        <video aspectratio="1.33333" bitrate="0" codec="mpeg4" \
        ffmpegindex="0" fps="0.0333667" height="480" id="0" \
        start_time="0.0" streamindex="0" width="640"/>       
        <audio bitrate="1411200" channels="2" codec="mp3" \
        ffmpegindex="1" id="1" language="N/A" samplerate="44100" \
        start_time="0.0" streamindex="1"/>       
    </streams>   
</file>
Preferred audio languages eng and eng
Video id: 0x0, Audio1: [1] 0x1 (MP3, N/A), Audio2: [-1] - 0x-1 (N/A, N/A)
Aspect ratio is 4:3
Re-encoding audio and video from nuv file
Encoding profile (HQ) found
mythtranscode started (using cut list) PID = 11508
Waiting for mythtranscode to create the fifos
2007-07-27 17:48:27.195 Using runtime prefix = /usr
2007-07-27 17:48:27.216 New DB connection, total: 1
2007-07-27 17:48:27.223 Enabled verbose msgs: important
2007-07-27 17:48:27.226 New DB connection, total: 2
2007-07-27 17:48:27.244 Using protocol version 31
Running ffmpeg
FFmpeg version SVN-rUNKNOWN, Copyright (c) 2000-2004 Fabrice Bellard
  configuration:  --prefix=/usr --libdir=${prefix}/lib \
  --shlibdir=${prefix}/lib --incdir=${prefix}/include/ffmpeg \
  --enable-shared --enable-mp3lame --enable-gpl --enable-faad \
  --mandir=${prefix}/share/man --enable-vorbis --enable-pthreads \
  --enable-faac --enable-xvid --enable-dts --enable-amr_nb \
  --enable-amr_wb --enable-pp --enable-libogg --enable-libgsm \
  --enable-x264 --enable-a52 --extra-cflags=-Wall -g -fPIC -DPIC
  libavutil version: 49.0.0
  libavcodec version: 51.11.0
  libavformat version: 50.5.0
  built on Oct 14 2006 21:20:45, gcc: 4.1.2 20061007 (prerelease) \
  (Debian 4.1.1-16)
Input #0, s16le, from '/myth/tmp/work/1/audout':
  Duration: N/A, bitrate: N/A
  Stream #0.0: Audio: pcm_s16le, 44100 Hz, stereo, 1411 kb/s
Input #1, rawvideo, from '/myth/tmp/work/1/vidout':
  Duration: N/A, bitrate: N/A
  Stream #1.0: Video: rawvideo, yuv420p, 640x480,  0.03 fps(r)
Output #0, dvd, to '/myth/tmp/work/1/newfile2.mpg':
  Stream #0.0: Video: mpeg2video, yuv420p, 720x480, q=5-31, \
  9000 kb/s,  5.00 fps(c)
  Stream #0.1: Audio: ac3, 48000 Hz, stereo, 192 kb/s
Stream mapping:
  Stream #1.0 -> #0.0
  Stream #0.0 -> #0.1
[mpeg2video @ 0xb7eb5ee8]MPEG1/2 does not support 5/1 fps
Error while opening codec for output stream #0.0 - maybe \
incorrect parameters such as bit_rate, rate, width or height
************************************************************
ERROR: Failed while running ffmpeg to re-encode video.
Command was ffmpeg -y -threads 2 -f s16le -ar 44100 -ac 2 -i \
/myth/tmp/work/1/audout -f rawvideo -pix_fmt yuv420p -s 640x480 \
-aspect 1.33333 -r 0.0333667 -i /myth/tmp/work/1/vidout -aspect \
1.33333 -r 0.0333667 -s 720x480 -b 9000k -vcodec mpeg2video \
-qmin 5 -ab 192k -ar 48000 -acodec ac3 -f dvd \
"/myth/tmp/work/1/newfile2.mpg"
************************************************************

chmod: changing permissions of `/myth/tmp/logs/tt.log': \
Operation not permitted
chmod: changing permissions of `/myth/tmp/logs/ff': \
Operation not permitted
Terminated

(The chmod errors at the end are because of some files I
left in /myth/tmp. The problem still occurs when the files
are removed.)
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paulh
 Post subject:
PostPosted: Tue Oct 30, 2007 9:24 am 
Offline
Joined: Sat Nov 12, 2005 3:52 pm
Posts: 65
cliffsjunk

Interesting. Thanks for looking at this.

So it looks like libavformat isn't getting the correct fps for nuv files which is causing all sorts of problems.

Any chance of a small sample file say 5 - 10Mb that I can have a play with to see if I can workout how to fix this.
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stevenj
 Post subject:
PostPosted: Fri May 09, 2008 10:09 pm 
Offline
Joined: Thu Jan 01, 2004 9:21 pm
Posts: 84
Location: Fort Collins, CO USA
The audio sync drift with MythArchive has been a problem for me for a long time so I finally started researching the problem today after trying every possible variation of the MythArchive settings on one particular recording. Cliffsjunk's solution of:
Quote:
Second: If you use the cutlist you must have a cut (at least a very short one) at the very beginning of the video.

fixed the problem for me. All my recordings are mpeg2 and I cut out the commercials for burning to DVD. But the audio would be out of sync with the video by up to 1 or 2 seconds by the end of some recordings when burned to DVD. I probably tried burning one show about 10 times today before fixing it by cutting the first frame off. I use MythArchive a lot and have never been able to figure out why some recordings do this when burned to DVD. This particular recording I hadn't cut anything off at the beginning. I think I do with most. Thanks for this tip.
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