Axel Thimm wrote:
> On Sun, Apr 19, 2009 at 09:40:38AM -0400, DISAFAN wrote:
>
>> I'm experiencing a problem that I experienced when i tried to hack the
>> FFMPEG file myself to produce results.
>>
>> Setting the bitrate to 2000, and the resolution to 960x540...the
>> settings I use for HD recordings, the files produced seem to have
>> playback problems in the internal MythTV playback.
>>
>> Running ffmpeg -i just to see the specs of the file produces:
>>
>> Duration: 00:00:00.00, start: 0.000000, bitrate: -2147483 kb/s
>> Stream #0.0: Video: mpeg4, yuv420p, 960x544 [PAR 136:135 DAR 16:9],
>> 29.97 tbr, 29.97 tbn, 29.97 tbc
>> Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 128 kb/s
>>
>
> Note that -2147483648 in 32 bit integer arithemtics is 0x80000000h,
> e.g. the lowest negative number that can be represented. I think
> this is the equivalent to "N/A".
>
> Can you try
>
> ffmpeg -analyzeduration 25M -i
>
> Also which ffmpeg is this? I thought newer ffmpeg versions use "N/A"
> instead of -2147483 kb/s.
>
> It is the latest 0.50 from your repository.
>> Now, this can be fixed by a command such as...
>>
>> mencoder file.avi -forceidx -oac copy -ovc copy -o fixedfile.avi
>>
>> Producing a result of...
>>
>> Duration: 00:19:49.68, start: 0.000000, bitrate: 2141 kb/s
>> Stream #0.0: Video: mpeg4, yuv420p, 960x544 [PAR 136:135 DAR 16:9],
>> 29.97 tbr, 29.97 tbn, 29.97 tbc
>> Stream #0.1: Audio: mp3, 48000 Hz, stereo, s16, 128 kb/s
>>
>> But I thought someone might have figured out what has changed that
>> causes the file to come out this way in the first place. Any ideas
>> before I submit this to Trac?
>>
>
> What created the first file? Can you try nuvexport --debug to see the
> commands that were used?
>
I'm running another encode right now to get another file with the same
error. I'm going to run that command on it right after it completes. And
try the debug. I haven't run a full series of tests yet, but will later
today when I have time. This is my preliminary information request, to
see if anyone has seen similar problems.
The first file was created with the stock nuvexportrc, with the
following override profile...just a straight cut and paste of te Xvid
section, with two modifiers.
<profile::hd>
mode = xvid
vbr = yes # Enable vbr to get the multipass/quantisation
options
# (enabling multipass or quantisation
automatically ena
bles vbr)
multipass = yes # You get either multipass or quantisation;
multipass wil
l override
# quantisation = 6 # 4 through 6 is probably right... 1..31 are
allowed (l
ower is better quality)
a_bitrate = 128 # Audio bitrate of 128 kbps
v_bitrate = 2000 # Remember, quantisation overrides video bitrate
width = 960 # Height adjusts automatically to width,
according to a
spect ratio
height = auto
</profile::hd>
_______________________________________________
atrpms-users mailing list
[email protected]
http://lists.atrpms.net/mailman/listinfo/atrpms-users
