[mythtv-users] Suggest transcode settings
Henk D. Schoneveld
belcampo at zonnet.nl
Thu Feb 13 15:57:11 UTC 2014
On 13 Feb 2014, at 14:54, Phil Wild <phil at holobyte.com.au> wrote:
> On 13 February 2014 19:20, John Pilkington <J.Pilk at tesco.net> wrote:
>>
>> On 13/02/14 10:44, Henk D. Schoneveld wrote:
>>>
>>>
>>> On 13 Feb 2014, at 10:24, Phil Wild <phil at holobyte.com.au> wrote:
>>>
>>>>
>>>> has to read:
>>>> ffmpeg -i your.mov -vf yadif -c:a libfaac -ab 128k -c:v libx264 -g 50 -crf 22 -s 896x720 your_small_crf22.mp4
>>>>
>>>>
>>>> Thanks =)
>>>>
>>>> I'll give this a go as a starting point tonight. My preference is to remove the interlacing. Interlaced video is fine on the TV but we also tend to use Plex to output to iPads/Android.
>>>
>>> If your distributions ffmpeg doesn't use libfaac, it could be libvo_aacenc or some other aac encoder. Replacing -c:a libfaac with -c:a copy will keep the original sound, or -an disables the sound which for video-quality testing purposes could be enough to start with.
>>>>
>>>>
>>>> Phil
>>
>>
>> Looks good, thanks, Henk. And this, while obvious, might save a little googling:
>>
>> https://trac.ffmpeg.org/wiki/x264EncodingGuide
>>
>> John P
>>
>
> What version of ffmpeg should I be using?
>
> This is what I have installed and none of the aac encoders mentioned work.
>
> $ ffmpeg -version
> ffmpeg version 0.8.10-4:0.8.10-0ubuntu0.12.04.1, Copyright (c)
> 2000-2013 the Libav developers
> built on Feb 6 2014 20:56:59 with gcc 4.6.3
> *** THIS PROGRAM IS DEPRECATED ***
> This program is only provided for compatibility and will be removed in
> a future release. Please use avconv instead.
> ffmpeg 0.8.10-4:0.8.10-0ubuntu0.12.04.1
> libavutil 51. 22. 2 / 51. 22. 2
> libavcodec 53. 35. 0 / 53. 35. 0
> libavformat 53. 21. 1 / 53. 21. 1
> libavdevice 53. 2. 0 / 53. 2. 0
> libavfilter 2. 15. 0 / 2. 15. 0
> libswscale 2. 1. 0 / 2. 1. 0
> libpostproc 52. 0. 0 / 52. 0. 0
> _______________________________
It’s rather old but will probably give you a good idea what you can achieve.
Don’t upgrade to avconv, it’s broken.
Download from http://ffmpeg.org/download.html a static build or build from git sources, same page, but you’ll have to install a lot of dev packages as well before you can compile one yourself.
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