[mythtv-users] MPEG4 bigger than MPEG2?

[Nick Rout]

On Fri, Mar 9, 2012 at 7:03 PM, Andrew Leech <coronasensei at gmail.com> wrote:
> On 9/03/2012 4:50 PM, Raymond Wagner wrote:
>> On 3/9/2012 00:41, Ross Boylan wrote:
>>> On Thu, 2012-03-08 at 23:56 -0500, Raymond Wagner wrote:
>>>> On 3/8/2012 22:51, Ross Boylan wrote:
>>>>> Hi, everyone.  I'm a new user, and am wondering why transcoding is
>>>>> making my files bigger.  More specifically, I think I have transcoded a
>>>>> file from MPEG-2 to MPEG-4, and it got a little bigger (3.1 vs 2.9GB).
>>>> It's all a function of bitrate.  MythTV will not automatically choose an
>>>> 'ideal' bitrate for you, it will use what you tell it to.  If the
>>>> bitrate you told it to use is larger than the bitrate you recorded it
>>>> as, you will end up with a larger file.
>>> How can I tell what  bitrate a recording is at?
>> file size (in bytes) / duration of recording (in seconds) * 8
>>
> I'm pretty sure the new player stats gives you this info:
> while the video is playing, bring up the osd menu (sorry don't know what
> key it normally is by default, might just be 'm') and under video menu I
> think, there's an item at the bottom called playback stats.
>
> Or from a command line with ffmpeg:
> ffmpeg -i filename.nuv
> or mplayer
> mplayer -ao dummy -vo dummy -identify filename.flv

mediainfo $FILE

will give good info, usually the output is long enough to pipe through
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