Hi folks,
Can you help me fix this ffmpeg script:
The goal:
Take in an mp4 (or mkv) with one video stream and TWO audio streams (one
AAC/2ch and one AC-3/5.1ch)... and output four video renditions (1920,
1280, 720, 480) that all keep *both* audio streams.
The input file is around 4mbps and I am
Carl's comments are great. I try to carve out duplicate content, but
this Q format may allow for leaving Carl's initial reply inline.
>> 1. Why does it make sense to convert from a lossy format to raw?
>> You're not
>> gaining any more detail.
>
> It doesn't, unless you need raw for some further
Thanks for the perspective, Phil :-) As I am not an ffmpeg expert, when
I [attempt to] mentally digest the documentation, I drill down into the
minutia until I hit "descriptively fundamental particles" ...often,
where I expect to find fundamental descriptions, there is just a hole
(in the
Is there a way to specify the LFE bitrate separately from the other
full-range channels?
Steven Ruppert via ffmpeg-user wrote on 9/15/22 16:24:
> On 9/12/22 09:33, Steven Ruppert via ffmpeg-user wrote:
>> I couldn't find any references whether that's inherent to the AAC 5.1
>> encoding, something
Mark Filipak wrote on 11/11/22 16:57:
> In the ffmpeg-user archive, could you PLEASE hide the sender's address
> so it can't be harvested?
>
> --Mark.
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>
> Clay via ffmpeg-user (12022-11-02):
>> Doesn't this serial ordering of the same command (-c:v ) twice just
>> drive cpu workload up for no actual benefit?
>>
>> To clarify: executing -c:v and then executing -c:v just
>> causes one output: yyy
Nicolas George wrote on 11/9/22 03:18:
> Dave Blanchard (12022-11-08):
>> Are you seriously asking me this? What a stupid question.
> I hope you do not expect getting help with that kind of attitude.
>
> To vent your frustration, please go elsewhere, this list is not made for
> that. (I suggest
Thank you Moritz!
I will apply your advice and report back!
On Thu, Sep 1, 2022, 02:26 Moritz Barsnick wrote:
> Hi Clay,
>
> On Tue, Aug 30, 2022 at 18:51:13 -0400, Clay wrote:
> > If you have a better way to achieve this, I am ***all ears***.
> > Here is the code I hav
On 6/29/2017 11:15 AM, Moritz Barsnick wrote:
On Thu, Jun 29, 2017 at 21:32:23 +0530, Gyan wrote:
There's no cropping taking place, as the video filter argument has been
replaced.
Ah, d'uh, I missed that. That's what he meant with size.
Clay, why did you write "wrong size" and
6,994,548
File3.mp45,777,801(Correct Size)
All of these files can be played with ffplay, but I use other video
players and they have trouble playing File4.mp4.
It is not a big problem to use 2 passes, but I'm curious if this is a
known issue or am I missing something?
Thanks, Clay
might require rotating the output videos by 90 degrees.
I would appreciate any advise on this.
Thanks, Clay
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Thank You Gyan!
On 6/26/2017 2:02 PM, Gyan wrote:
On Mon, Jun 26, 2017 at 11:58 PM, Clay D. Montgomery <c...@montgomery1.com>
wrote:
Hello,
I'm wondering if it is possible to use ffmpeg to slice 4K video into a
set of four 1080p videos and do it without scaling.
You need
Dumb ffmpeg question alert:
What is a "pad" in the context of an "input pad", an "output pad" and a
"filter pad"?
I understand the concept of padding a video with horizontal or vertical
bars, padding audio with dead air or some other audio, but this is
different.
Is there a technical description
>
> 36.39 apad
> Pad the end of an audio stream with silence.
> This can be used together with ffmpeg -shortest to extend audio
> streams to the same length as the video stream
>
> 39.181 pad
> Add paddings to the input image, and place the original input at the
> provided x, y coordinates.
> It
Pehache,
Thank you for this simple explanation/reminder:
> Reminder : by default ffmpeg keeps only 1 video track and 1 audio
> track (so here you are implicitely dropping the second audio track and
> the subtitle track). "-map 0" means that you keep all the tracks
> present in the input file.
--Hi Steve
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with ffmpeg-python (https://github.com/kkroening/ffmpeg-python), have
you (or anyone reading this) played around with it?
*I apologize to the forum for the accidental prior message (inadvertent
click :-P)
Liberty & Regard,
Clay
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> Le 31/10/2022 à 14:23, Naveen.B a écrit :
>> I observed some weird behaviour with fast and medium preset,
>>
>> fast preset:
>> *ffmpeg -pixel_format gray10le -s 1600x1300 -r 30 -i
>> CapturedImage-%03d.raw
>> -c:v rawvideo -pixel_format yuv420p -f rawvideo -c:v libx264 -preset
>> fast
>> -crf
Carl Zwanzig wrote on 10/31/22 19:01:
> On 10/31/2022 6:23 AM, Naveen.B wrote:
>> I observed some weird behaviour with fast and medium preset,
>
> We've observed that you're -still- top-posting, please stop it.
>
>
Reminder: Top Posting: Replying ABOVE the Quote... :-)
*Don't ask me how I know
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