On 12/27/2017 12:49 PM, Beartooth wrote:
>
> My apologies if this is a Very Dumb Question: what are people
> viewing mp4 files with? I've tried a bunch of stuff, and searched "Fedora
> mp4" online, but it seems nothing I have installed will do it.
VLC should certainly play it...provided you have the appropriate codecs
installed. Mplayer as well--again with the codec proviso. There's
nothing magical about an MP4...it's just a container. What matters is
how the content inside it is handled. Most MP4 video now is h.264-
encoded and most audio is AAC-encoded.
If you have installed ffmpeg, try "ffprobe name-of-file.mp4" or if
you've installed mediainfo, try "mediainfo name-of-file.mp4". Both will
tell you how the thing is configured (they'll show the data in different
formats).
Using ffprobe against a video I shot of my dog versus the robotic vacuum
cleaner:
[rick@golem4 Videos]$ ffprobe -hide_banner TristaRoomba.MP4
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'TristaRoomba.MP4':
Metadata:
major_brand : mp42
minor_version : 1
compatible_brands: mp42avc1
creation_time : 2012-08-05T08:19:44.000000Z
original_format : Digital Camera
original_format-eng: Digital Camera
comment : SANYO DIGITAL CAMERA CG20
comment-eng : SANYO DIGITAL CAMERA CG20
Duration: 00:02:15.14, start: 0.000000, bitrate: 17115 kb/s
Stream #0:0(eng): Video: h264 (Main) (avc1 / 0x31637661),
yuvj420p(pc, bt709), 1920x1080 [SAR 1:1 DAR 16:9], 16712 kb/s, 59.94
fps, 59.94 tbr, 60k tbn, 59.94 tbc (default)
Metadata:
creation_time : 2012-08-05T08:19:44.000000Z
Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 255 kb/s (default)
Metadata:
creation_time : 2012-08-05T08:19:44.000000Z
The video is 2 minutes, 15.14 seconds long. "Stream #0:0" is the video
track encoded via h264 and "Stream #0:1" is the audio track encoded
using aac.
If you want to know, it was a stalemate. The dog only weighs 24 pounds
(~12kg). They now co-exist--albeit via an uneasy armed truce.
----------------------------------------------------------------------
- Rick Stevens, Systems Engineer, AllDigital ricks@xxxxxxxxxxxxxx -
- AIM/Skype: therps2 ICQ: 22643734 Yahoo: origrps2 -
- -
- Artificial Intelligence usually beats real stupidity. -
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