29 May
2013
29 May
'13
10:06 p.m.
Hello all,
I recently tried to cut a bit from the beginning an end of an mp4 source
file in DVD-o-matic, which did not seem to work correctly.
For my first try, I entered the start and end frame numbers (as seen
below the video windows of DVD-o-matic) of the part I wanted to encode
and "encode all frames and play the subset" as method. This resulted in
the whole file being converted, just as if I didn't enter anything.
For my second try, I entered the number of frames I wanted to cut from
the beginning and the end of the video and selected "encode only the
subset". Now, the *audio* was cut at the right point, but the video
played from the beginning again.
Additionally, I saved the project and loaded it at a later time. Now,
the "Start" and "End" fields were set to "100" each, which
bears no
resemblance to what I had input into the fields before saving (750 and
251, respectively).
How is this trimming supposed to work? What do I have to enter into the
fields to get 750 frames cut from the beginning and 251 frames cut from
the end? Any help is appeciated.
Greetings from Germany
Kasi Mir
30 May
30 May
11:08 a.m.
Am 30.05.2013 um 00:06 schrieb Karim 'Kasi Mir' Senoucci:
For my first try, I entered the start and end frame
numbers (as seen below the video windows of DVD-o-matic) of the part I wanted to encode
and "encode all frames and play the subset" as method. This resulted in the
whole file being converted, just as if I didn't enter anything.
'Converted' - or 'played' ? The 'encode all frames and play the
subset' option working can only be checked by playing the resulting CPL/DCP on a
server or with easyDCP Player or the digitALL dcpPlayer.
For my second try, I entered the number of frames I
wanted to cut from the beginning and the end of the video and selected "encode only
the subset". Now, the *audio* was cut at the right point, but the video played from
the beginning again.
Additionally, I saved the project and loaded it at a later time. Now, the
"Start" and "End" fields were set to "100" each, which bears
no resemblance to what I had input into the fields before saving (750 and 251,
respectively).
Same here, there is a problem with the trim params saving, Carl knows about it already.
How is this trimming supposed to work? What do I have to enter into the fields to get 750
frames cut from the beginning and 251 frames cut from the end? Any help is appeciated.
Your thinking is right - Start 750 and End 251 should cut 750 frames from the beginning
and 251 FROM the end. But I noticed similiar issues with my trimming tests. The mailing
lists has some posts regarding this.
Here is a link to a test file, try it, get the easyDCP Player Demo, and get back to us
with the results:
https://dl.dropboxusercontent.com/u/5582554/Count300_24.mov
Which version did you try?
- Carsten
11:10 a.m.
Hi Karim,
On Thu, 30 May 2013, Karim 'Kasi Mir' Senoucci wrote:
Hello all,
I recently tried to cut a bit from the beginning an end of an mp4 source file
in DVD-o-matic, which did not seem to work correctly.
For my first try, I entered the start and end frame numbers (as seen below
the video windows of DVD-o-matic) of the part I wanted to encode and "encode
all frames and play the subset" as method. This resulted in the whole file
being converted, just as if I didn't enter anything.
When you say "the whole file being converted", what exactly do you mean?
Did the resulting DCP play back the whole source file, with no trimming?
For my second try, I entered the number of frames I
wanted to cut from the
beginning and the end of the video and selected "encode only the subset".
Now, the *audio* was cut at the right point, but the video played from the
beginning again.
I think that is due to a bug in DVD-o-matic which will be fixed in the
next version. You can work around it by deleting the "video" folder
within the film's folder before creating the DCP. DVD-o-matic mistakenly
tries to re-use the old video content (with no-trim) but creates new
audio.
Additionally, I saved the project and loaded it at a
later time. Now, the
"Start" and "End" fields were set to "100" each, which
bears no resemblance
to what I had input into the fields before saving (750 and 251,
respectively).
That is strange. Is that repeatable?
How is this trimming supposed to work? What do I have
to enter into the
fields to get 750 frames cut from the beginning and 251 frames cut from the
end? Any help is appeciated.
You are doing the right thing, but something is going wrong with
DVD-o-matic....
Best
Carl
7:13 p.m.
Hi everyone,
Am 30.05.2013 13:10, schrieb Carl Hetherington:
Ah, that might be it - I didn't erase the old video dir in
the "project"
directory. I will retry that later tonight and get back to you on that.
Yes, it seems to happen every time. I just
did the following:
1. I created a new project named "BLUBB".
2. In the film tab, I loaded a dummy Quicktime movie (in this case, a
1080p film trailer from apple.com which I had lying around), and
waited for DVDom to analyze the file.
3. Then, I entered "500" in both the "Start" and "End"
fields next to
"Trim frames".
4. I selected "File"->"Save" to save the project.
5. I exited DVDom.
6. I started DVDom again and reloaded the project via
"File"->"Open".
7. Now, both fields contain the value "100".
I just remembered an important detail I forgot to mention with my first
try. I didn't generate the DCP right away, but rather saved the project
and loaded it later into your shiny new batch encode tool. If the trim
values aren't saved correctly, then it's no wonder that the first try
played the untrimmed video - the fields probably were reset to "100",
too (which you can't see in the batch encoder, as the values aren't
displayed).
Greetings from Germany
Kasi Mir
Hi Karim,
On Thu, 30 May 2013, Karim 'Kasi Mir' Senoucci wrote:
Yes, exactly that. As Carsten was asking how I tested the results, by
the way: I'm using "Stereoscopic Player" to play the DCP packages.
On the subject of the trimming method - do I understand this correctly:
Does "encode all frames and play the subset" make a package of the whole
film and writes instructions into the metadata to only play the
untrimmed part? Or what does it mean exactly?
For my first try, I entered the start and end
frame numbers (as seen
below the video windows of DVD-o-matic) of the part I wanted to
encode and "encode all frames and play the subset" as method. This
resulted in the whole file being converted, just as if I didn't enter
anything.
When you say "the whole file being converted", what exactly do you
mean? Did the resulting DCP play back the whole source file, with no
trimming? For my second try, I entered the number of frames
I wanted to cut
from the beginning and the end of the video and selected "encode only
the subset". Now, the *audio* was cut at the right point, but the
video played from the beginning again.
I think that is due to a bug in DVD-o-matic which will be fixed in the
next version. You can work around it by deleting the "video" folder
within the film's folder before creating the DCP. DVD-o-matic
mistakenly tries to re-use the old video content (with no-trim) but
creates new audio. Additionally, I saved the project and loaded it
at a later time. Now,
the "Start" and "End" fields were set to "100" each, which
bears no
resemblance to what I had input into the fields before saving (750
and 251, respectively).
That is strange. Is that repeatable?
7:52 p.m.
On Thu, 30 May 2013, Karim 'Kasi Mir' Senoucci wrote:
Hi everyone,
Am 30.05.2013 13:10, schrieb Carl Hetherington:
Hi Karim,
On Thu, 30 May 2013, Karim 'Kasi Mir' Senoucci wrote:
For my first try, I entered the start and end frame numbers (as seen below
the video windows of DVD-o-matic) of the part I wanted to encode and "encode all
frames and play the subset"
as method. This resulted in the whole file being converted, just as if I
didn't enter anything.
When you say "the whole file being converted", what exactly do you mean?
Did the resulting DCP play back the whole source file, with no trimming?
Yes, exactly that. As Carsten was asking how I tested the results, by the way: I'm
using "Stereoscopic Player" to play the DCP packages.
On the subject of the trimming method - do I understand this correctly: Does "encode
all frames and play the subset" make a package of the whole film and writes
instructions into the metadata to only play
the untrimmed part? Or what does it mean exactly?
Yes, that is exactly what it means. The advantage of doing it that way is
that if you subsequently change the trim DVD-o-matic can very quickly
generate a new DCP without having to do very much disk IO or processing.
For my second try, I entered the number of frames I wanted to cut from the
beginning and the end of the video and selected "encode only the subset". Now,
the *audio* was cut at the
right point, but the video played from the beginning again.
I think that is due to a bug in DVD-o-matic which will be fixed in the next
version. You can work around it by deleting the "video" folder
within the film's folder before creating the DCP. DVD-o-matic mistakenly tries
to re-use the old video content (with no-trim) but creates new audio.
Ah, that might be it - I didn't erase the old video dir in the "project"
directory. I will retry that later tonight and get back to you on that.
You shouldn't have to, but you will at the moment due to a bug. I'll fix
it. DVD-o-matic is supposed to know when it has to regenerate the video.
Additionally, I saved the project and
loaded it at a later time. Now, the "Start" and "End" fields were set
to "100" each, which bears no resemblance to what I had input into the
fields before saving (750 and 251, respectively).
That is strange. Is that repeatable?
Yes, it seems to happen every time. I just did the following:
1. I created a new project named "BLUBB".
2. In the film tab, I loaded a dummy Quicktime movie (in this case, a 1080p film trailer
from apple.com which I had lying around), and waited for DVDom to analyze the file.
3. Then, I entered "500" in both the "Start" and "End"
fields next to "Trim frames".
4. I selected "File"->"Save" to save the project.
5. I exited DVDom.
6. I started DVDom again and reloaded the project via
"File"->"Open".
7. Now, both fields contain the value "100".
OK, strange! Can you attach the metadata file you get after step 4?
I just remembered an important detail I forgot to
mention with my first try. I didn't generate the DCP right away, but rather saved the
project and loaded it later into your shiny new batch encode tool. If
the trim values aren't saved correctly, then it's no wonder that the first try
played the untrimmed video - the fields probably were reset to "100", too (which
you can't see in the batch encoder, as the
values aren't displayed).
Ah yes, that would make sense.
Thanks
Carl
9:36 p.m.
Hi everyone,
No problem; interestingly, the file contains the correct trim values:
---------------------------------
version 4
name BLUBB
use_dci_name 1
content E:\silverlinings-tlr1_h1080p.mov
trust_content_header 1
dcp_content_type TLR
format 185
left_crop 0
right_crop 0
top_crop 0
bottom_crop 0
scaler bicubic
trim_start 500
trim_end 500
trim_type cpl
dcp_ab 0
selected_content_audio_stream ffmpeg 1 44100 3 eng
use_content_audio 1
audio_gain 0
audio_delay 0
still_duration 10
with_subtitles 0
subtitle_offset 0
subtitle_scale 1
colour_lut 0
j2k_bandwidth 200000000
audio_language EN
subtitle_language
territory US
rating R
studio
facility
package_type
dci_date 20130530
dcp_frame_rate 24
width 1920
height 816
length 3792
content_digest a87a2fc480ff4faefe29154d639d85ec
content_audio_stream ffmpeg 1 44100 3 eng
external_audio_stream external 0 0
source_frame_rate 23.976
---------------------------------
But when I load the project, the trim values both read "100", not
"500".
To report on my third try: as long as I don't save and load, but rather
encode directly, the trims now work almost as planned. It just seems
that the values I see below the video window of DVDom are a little off.
In my source, there is a fade to black; when I skip the video in DVDom
until I see that black screen, the frame counter below the video reads
"750". But neither entering 750 nor 751 completely eliminated the
preceeding video - the DCP package starts a faction of a second before
the fade to black. As of this writing, I re-encode the DCP (after again
deleting the video, of course ;-)) with a starting time value of "753"
to test whether cuts at the black screen or before that.
Greetings from Germany
Kasi Mir
Additionally, I saved the project and
loaded it at a
later time. Now, the "Start" and "End" fields were set to
"100" each,
which bears no resemblance to what I had input into the
fields before saving (750 and 251, respectively).
That is strange. Is that repeatable?
Yes, it seems to happen every time. I just did the following:
1. I created a new project named "BLUBB".
2. In the film tab, I loaded a dummy Quicktime movie (in this case,
a 1080p film trailer from apple.com which I had lying around), and
waited for DVDom to analyze the file.
3. Then, I entered "500" in both the "Start" and "End"
fields next
to "Trim frames".
4. I selected "File"->"Save" to save the project.
5. I exited DVDom.
6. I started DVDom again and reloaded the project via
"File"->"Open".
7. Now, both fields contain the value "100".
OK, strange! Can you attach the metadata file you get after step 4?
10:10 p.m.
31 May
31 May
12:03 a.m.
On Fri, 31 May 2013, Carsten Kurz wrote:
No problem; interestingly, the file contains the correct trim values:
Same here. They are only applied correctly upon/after entering them
manually. They are saved correctly, but after reloading the project
file, are reset to '100'/'100'. So a problem with the metadata reading.
Thanks both. That was a silly mistake in the GUI. Should be fixed in the
forthcoming 0.94.
Best regards
Carl
30 May
30 May
10:07 p.m.
Am 30.05.2013 um 21:13 schrieb Karim 'Kasi Mir' Senoucci:
Yes, exactly that. As Carsten was asking how I tested
the results, by the way: I'm using "Stereoscopic Player" to play the DCP
packages.
On the subject of the trimming method - do I understand this correctly: Does "encode
all frames and play the subset" make a package of the whole film and writes
instructions into the metadata to only play the untrimmed part? Or what does it mean
exactly?
Stereoscopic player only plays the MXF - which will contain ALL video frames if you use
the 'encode all frames and play the subset' option. A 'real' DCP Player
will skip the trimmed frames by using the associated CPL as a playlist. The CPL will tell
the cinema server or DCP Player which video and audio parts to play and which to skip.
- Carsten
31 May
31 May
10:52 a.m.
Hello everyone,
Am 31.05.2013 00:07, schrieb Carsten Kurz:
Stereoscopic player only plays the MXF - which will
contain ALL video frames if you use the 'encode all frames and play the subset'
option. A 'real' DCP Player will skip the trimmed frames by using the associated
CPL as a playlist. The CPL will tell the cinema server or DCP Player which video and audio
parts to play and which to skip.
Thanks for pointing that out, I hadn't realized that Stereoscopic isn't
a full-fledged DCP player. Unfortunately, all real DCP Player I know are
one or two orders of magnitude more expensive and thus no option for me;
but I won't use the "encode all and play only parts" option again anyway
as I don't need the trimmed parts to be converted.
Greetings
Kasi Mir
4350
days inactive
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9 comments
3 participants
participants (3)
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Carl Hetherington -
Carsten Kurz -
Karim 'Kasi Mir' Senoucci