Hey Dan,
Thanks for the quick response. I am pretty sure I am still having
trouble. maybe I don't understand the caveats, very sure I am frazzled,
doing the best I can to gather the details needed.
The source file I am working with (10_40_23.dv picked from 100) is 900mb,
so I pulled some some frames out and seem to have a good test.
melt -progress -profile dv_ntsc_wide 10_40_23.dv force_aspect_ratio=@32/27
in=2500 out=2600 -consumer avformat:x2.dv
uploaded here:
http://5cda49ca88af98bf1f1e-b4c3b47b38bb1b572e0805ecabeeb59c.r76.cf2.rackcdn.com/x2.dv
if I play it, force_aspect_ratio doesn't seem to change anything.
melt profile=dv_ntsc_wide x2.dv
melt profile=dv_ntsc_wide x2.dv force_aspect_ratio=@32/27
Same with encoding to webm.
In case this helps:
melt -progress -profile dv_ntsc_wide x2.dv force_aspect_ratio=@32/27
$ melt -progress -profile dv_ntsc_wide x2.dv force_aspect_ratio=@32/27
-consumer xml
[dv @ 0xf011c0] Estimating duration from bitrate, this may be inaccurate
[dv @ 0xf038c0] Estimating duration from bitrate, this may be inaccurate
[dv @ 0xf04b20] Estimating duration from bitrate, this may be inaccurate
<?xml version="1.0"?>
<mlt LC_NUMERIC="en_US.UTF-8" version="0.9.3" title="x2.dv">
<profile description="DV/DVD Widescreen NTSC" width="720" height="480"
progressive="0" sample_aspect_num="32" sample_aspect_den="27"
display_aspect_num="16" display_aspect_den="9" frame_rate_num="30000"
frame_rate_den="1001" colorspace="601"/>
<producer id="producer0" in="0" out="100">
<property name="mlt_type">producer</property>
<property name="length">101</property>
<property name="eof">pause</property>
<property name="resource">x2.dv</property>
<property name="meta.media.nb_streams">2</property>
<property name="meta.media.0.stream.type">video</property>
<property name="meta.media.0.stream.frame_rate">29.97</property>
<property
name="meta.media.0.stream.sample_aspect_ratio">1.18519</property>
<property name="meta.media.0.codec.width">720</property>
<property name="meta.media.0.codec.height">480</property>
<property name="meta.media.0.codec.frame_rate">29.97</property>
<property name="meta.media.0.codec.pix_fmt">yuv411p</property>
<property
name="meta.media.0.codec.sample_aspect_ratio">1.18519</property>
<property name="meta.media.0.codec.colorspace">601</property>
<property name="meta.media.0.codec.name">dvvideo</property>
<property name="meta.media.0.codec.long_name">DV (Digital
Video)</property>
<property name="meta.media.0.codec.bit_rate">28771229</property>
<property name="meta.media.1.stream.type">audio</property>
<property name="meta.media.1.codec.sample_fmt">s16</property>
<property name="meta.media.1.codec.sample_rate">48000</property>
<property name="meta.media.1.codec.channels">2</property>
<property name="meta.media.1.codec.name">pcm_s16le</property>
<property name="meta.media.1.codec.long_name">PCM signed 16-bit
little-endian</property>
<property name="meta.media.1.codec.bit_rate">1536000</property>
<property name="meta.attr.timecode.markup">00:00:00:00</property>
<property name="seekable">1</property>
<property name="meta.media.sample_aspect_num">32</property>
<property name="meta.media.sample_aspect_den">27</property>
<property name="aspect_ratio">1.18519</property>
<property name="audio_index">1</property>
<property name="video_index">0</property>
<property name="mlt_service">avformat</property>
<property name="force_aspect_ratio">1.18519</property>
</producer>
<playlist id="playlist0">
<entry producer="producer0" in="0" out="100"/>
</playlist>
<tractor id="tractor0" title="x2.dv" global_feed="1" in="0" out="100">
<track producer="playlist0"/>
</tractor>
</mlt>
Thanks again for all your help.
On Tue, Jan 13, 2015 at 1:11 PM, Dan Dennedy <d...@dennedy.org> wrote:
> On Mon, Jan 12, 2015 at 3:42 PM, Carl Karsten <c...@personnelware.com>
> wrote:
>
>> I am hoping there is a setting I can use to override the aspect ratio set
>> in dv frames.
>>
>> I have .dv files that are a mix of 4:3 frames and 16:9. they should all
>> be 16:9. (it is a result of sending 16:9 vga in to a scan converter that
>> spit out 4:3 dv.) I don't need black bars or any sort of transformation,
>> just change the aspect ratio byte on the dv frame.
>>
>> when I encode, melt seems to use the first frame. I could add a single
>> dv frame to the start of each file, that would likely work. I am hoping I
>> can just add a parameter to my .mlt xml or melt command line.
>>
>> Any suggestions?
>>
>>
> Hi Carl,
> Yes, you can supply force_aspect_ratio to the producer, but there are 2
> caveats:
>
> 1.) It does not instruct the auto-profile mechanism - use an explicit
> profile.
> 2.) It is sample, not picture aspect - see a profile for details.
>
> For example,
> melt -query profile=dv_ntsc_wide
> ---
> description: DV/DVD Widescreen NTSC
> frame_rate_num: 30000
> frame_rate_den: 1001
> width: 720
> height: 480
> progressive: 0
> sample_aspect_num: 32
> sample_aspect_den: 27
> display_aspect_num: 16
> display_aspect_den: 9
> colorspace: 601
> ...
> melt -profile dv_ntsc_wide some.dv force_aspect_ratio=@32/27
>
> (The @ sign makes the MLT properties system interpret the value as a
> simple math expression.)
>
>
>
>
>
--
Carl K
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