[mythtv-users] FFMpeg optimal settings for 1080i

Mon Jan 27 13:03:03 UTC 2014

On 01/27/2014 07:45 AM, John Pilkington wrote:
> On 27/01/14 12:19, Joseph DeGraw wrote:
>> On 01/27/2014 05:54 AM, John Pilkington wrote:
>>> On 27/01/14 08:20, John Finlay wrote:
>>>> On 1/26/2014 10:51 PM, faginbagin wrote:
>>>>> On 1/25/2014 6:14 PM, Joseph DeGraw wrote:
>>>>>> On 01/25/2014 05:34 PM, Joseph DeGraw wrote:
>>>>>>> I have been working on an issue with HDtv 1080i recordings being
>>>>>>> burned
>>>>>>> to DVD for playback. It seems with the default settings for
>>>>>>> mytharchive
>>>>>>> (mythtv .27-fixes, Mythbuntu 12.04) it takes a abnormal amount of
>>>>>>> time
>>>>>>> to burn a dvd. After alot of reading I came across a thread at the
>>>>>>> ffmpeg forums that was very helpful and also listed a command line
>>>>>>> for
>>>>>>> getting the job done alot faster. Infact, It took me about 20 -30
>>>>>>> minutes or less to get a 1920x1080 movie recording onto a dvd with
>>>>>>> good
>>>>>>> quality. Below is the command line that I used.
>>>>>>>
>>>>>>> ffmpeg -i "Fatal Honeymoon.mpg" -filter:v
>>>>>>> "scale='if(gt(a,720/480),720,-1)':'if(gt(a,720/480),-1,480)',pad=w=720:h=480:x=(ow-iw)/2:y=(oh-ih)/2"
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> -target ntsc-dvd FatalHoneymoon.mpg
>>>>>>>
>>>
>>> That looks like a 'Hey, Mom, look at me' command line.  What happens
>>> if you use
>>>
>>> ffmpeg -i "Fatal Honeymoon.mpg" -target ntsc-dvd FatalHoneymoon.mpg
>>>
>>> or the same but with mythffmpeg?
>>>
>>> Does it produce a growing output file?  Is the result off centre, too
>>> wide, too high?   A quick test on the first minute or two would give
>>> the answer.  And I would still like to know the result of
>>>
>>> ffmpeg -i  "Fatal Honeymoon.mpg"
>>>
>>> Cheers,
>>>
>>> John P
>>>
>>> _______________________________________________
>>> mythtv-users mailing list
>>> mythtv-users at mythtv.org
>>> http://www.mythtv.org/mailman/listinfo/mythtv-users
>>>
>>
>> Sorry about the delay.
>>
>>
>> coffee at mythtv2013:~/Videos$ mythffmpeg -i "Fatal Honeymoon.mpg"
>> ffmpeg version 1.2.2 Copyright (c) 2000-2013 the FFmpeg developers
>>    built on Nov 20 2013 01:49:00 with gcc 4.6 (Ubuntu/Linaro
>> 4.6.3-1ubuntu5)
>>    configuration: --compile-type=profile --prefix=/usr --runprefix=/usr
>> --disable-mythlogserver --enable-crystalhd --enable-lirc
>> --enable-audio-alsa --enable-audio-oss --enable-dvb --enable-ivtv
>> --enable-firewire --enable-joystick-menu --with-bindings=perl
>> --enable-ffmpeg-pthreads --enable-pic
>> --perl-config-opts='INSTALLDIRS=vendor' --enable-libvpx --enable-sdl
>> --enable-libmp3lame --enable-libx264 --enable-opengl-video
>> --enable-vaapi --enable-vdpau
>>    libavutil      52. 18.100 / 52. 18.100
>>    libavcodec     54. 92.100 / 54. 92.100
>>    libavformat    54. 63.104 / 54. 63.104
>>    libavdevice    54.  3.103 / 54.  3.103
>>    libavfilter     3. 42.103 /  3. 42.103
>>    libswscale      2.  2.100 /  2.  2.100
>>    libswresample   0. 17.102 /  0. 17.102
>>    libpostproc    52.  2.100 / 52.  2.100
>> [mpegts @ 0x22a8a20] PES packet size mismatch
>> Input #0, mpegts, from 'Fatal Honeymoon.mpg':
>>    Duration: 00:39:30.56, start: 11713.117711, bitrate: 13362 kb/s
>>      Stream #0:0[0x800]: Video: mpeg2video (Main), yuv420p, 1920x1080
>> [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
>>      Stream #0:1[0x801](eng): Audio: ac3, 48000 Hz, stereo, fltp, 192
>> kb/s
>>      Stream #0:2[0x802](spa): Audio: ac3, 48000 Hz, 5.1(side), fltp,
>> 384 kb/s
>> At least one output file must be specified
>>
>
> Ok, thanks.  I just wanted the last few lines to see what the format
> was.   And about the command line - it's complex and I wasn't sure
> that you were suffering from any of the problems that it might be
> intended to solve.  I found a pastebin with ffmpeg complaining that it
> couldn't parse something that looked very similar, too.
>
> I opened Ticket 12026 about this a few days ago.
>
> Cheers,
>
> John P
>
>
>
>
>
>
> _______________________________________________
> mythtv-users mailing list
> mythtv-users at mythtv.org
> http://www.mythtv.org/mailman/listinfo/mythtv-users
>
Hi John,

Thanks for the quick reply. Boy, It seems making DVD's is a hit or miss
situation with alot of my recordings. Yesterday I worked on getting one
of my girlfriends movies to DVD. Its a 12 gig movie, 1920x1080 and got
it down to a size workable with a DVD - below 4.7 gig. Now I noticed
that it didnt burn and started checking the logs. It seems dvdauthor
didnt like something and died.

/var/lib/mytharchive/temp/work/dvdauthor.xml:58: parser error : Comment
not terminated
:00,01:05:00,01:10:00,01:15:00,01:20:00,01:25:00,01:30:00,01:35:00,01:40:00,01:4

^
ERR:  Error in parsing XML
************************************************************
ERROR: Failed while running dvdauthor. Result: 1
See mythburn.log for more information.
************************************************************

chmod: changing permissions of `/var/lib/mytharchive/temp/': Operation
not permitted
chmod: changing permissions of `/var/lib/mytharchive/temp/logs':
Operation not permitted
chmod: changing permissions of `/var/lib/mytharchive/temp/work':
Operation not permitted
chmod: changing permissions of `/var/lib/mytharchive/temp/config':
Operation not permitted
Terminated

----------------

I think I remember seeing some comments on the chmod errors and will
look up today and see about that. For the most part -- ls -l
/var/lib/mytharchive produces this:

drwxrwxrwx 2 mythtv mythtv 4096 Jan 26 16:46 config
drwxrwxrwx 2 mythtv mythtv 4096 Jan 26 17:11 logs
drwxrwxrwx 4 mythtv mythtv 4096 Jan 26 17:11 work

Thanks for your comments,

jdegraw