[mythtv-users] FFMpeg optimal settings for 1080i

[John Pilkington]

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
>>
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>>
>
> 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