Re: [FFmpeg-user] Scaling a video with multiple different resolutions

[Jesse Liu]

of course, if you want to output a 852x480 video, you can do it by:  ffmpeg  -i 
video.webm -filter_complex 
“[0:v]split=2[out1][out2];[out1]trim=start=starttiem1:end=endtime1,scale=w='if(gt(a,1.775),852,trunc(480*a/2)*2)':h='if(lt(a,1.775),480,trunc(852/a/2)*2),pad=w=852:h=480:x='if(gt(a,1.775),0,(852-iw)/2)':y='if(lt(a,1.775),0,(480-ih)/2)':color=black[trim0];[out2]trim=start=starttiem2:end=endtime2,scale=w='if(gt(a,1.775),852,trunc(480*a/2)*2)':h='if(lt(a,1.775),480,trunc(852/a/2)*2),pad=w=852:h=480:x='if(gt(a,1.775),0,(852-iw)/2)':y='if(lt(a,1.775),0,(480-ih)/2)':color=black[trim1];[trim0][trim1]concat=n=1:v=1:unsafe=1:a=0[v]”
 -map [v] -map [0:a] -c:v libx264 -c:a aac out.mp4. 1.775 in the command is 
equal to 852/480

> On 13 Jan 2017, at 8:10 AM, Alex Speller  wrote:
> 
> I have a webm file that has multiple different resolutions in it (it's a
> screen capture of a window that changes dimensions).
> 
> https://www.dropbox.com/s/ptueirabmmht0fr/4be7fdb7-d7e9-41b4-ba26-e20a3eeb6026.webm?dl=0
> 
> Is there any way to "normalize" the dimensions and output a video of a
> constant resolution, having e.g. black borders around the video when the
> resolutions change
> 
> If you play the video on the dropbox page above, in chrome or firefox, how
> that looks is what I'd like to output. Tried messing around with scale,
> setsar and setdar parameters but I can't figure out how to get output
> that's not just distorted
> 
> Any help appreciated, thanks!
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[FFmpeg-user] Need help understanding framerate conversion!

[Matthias, Thomas]

Hi All,

I need to mux and then framerate convert a rawvideo .mov file, and a PCM 16bit 
48Khz wav file.

For example,  a .mov file is exactly 10 seconds long, and a .wav file is also 
exactly 10 seconds.  The initial .mov file is a 30 frames-per-second, but after 
muxing with the audio, I need to convert it to 29.97.  The issue I’m seeing is 
that for some reason, the resulting video file is slightly longer than 10 
seconds, and the resulting audio is just shy of 10 seconds.  This leads to the 
audio being out-of-sync with the video by the end of the video.  In reality, 
I’m performing this task with much longer clips, and so the av-sync issue is 
much more noticeable, but even at 10 seconds the sync offset is noticeable in a 
video editor.

What am I doing wrong?  I’ve tried separating the muxing and framerate 
conversion into separate FFmpeg calls, but that doesn’t help. I’ve tried 
numerous setting combinations, but nothing keeps the audio at the correct 
length.  I’ve tried using atempo to stretch the audio, but that doesn’t even 
seem to work.  Here is an example command I’ve tried:

ffmpeg –y –i initial_video.mov –i initial_audio.wav –c:v  rawvideo –c:a 
pcm_s16le –pix_fmt uyvy422 –r 3/1001 output.mov

I’m clearly missing something here, but I have no idea why the audio track 
would end up shorter (in the 10s example, it’s about 9.98 seconds after), and 
the video longer (about 10.06).  Thanks!

~Thomas
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Re: [FFmpeg-user] error when I compile Microsoft ffmpeginterop

[Reindl Harald]

Am 12.01.2017 um 23:35 schrieb Carl Eugen Hoyos:

All the software is the newest.FFMPEG is version 3.2.2.


This is not the newest FFmpeg, it is ten weeks old


then release more often then 10 weeks or more

when do you realize that ffmpeg is the only mailing list and project on 
this planet where people are supposed to use snapshots?


according to https://ffmpeg.org/releases/ *it is* the newest release
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[FFmpeg-user] Scaling a video with multiple different resolutions

[Alex Speller]

I have a webm file that has multiple different resolutions in it (it's a
screen capture of a window that changes dimensions).

https://www.dropbox.com/s/ptueirabmmht0fr/4be7fdb7-d7e9-41b4-ba26-e20a3eeb6026.webm?dl=0

Is there any way to "normalize" the dimensions and output a video of a
constant resolution, having e.g. black borders around the video when the
resolutions change

If you play the video on the dropbox page above, in chrome or firefox, how
that looks is what I'd like to output. Tried messing around with scale,
setsar and setdar parameters but I can't figure out how to get output
that's not just distorted

Any help appreciated, thanks!
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Re: [FFmpeg-user] error when I compile Microsoft ffmpeginterop

[Carl Eugen Hoyos]

2017-01-12 18:26 GMT+01:00 Alfred :
> There is some errors when I compile ffmpeginterop.

This is not software supported by FFmpeg (from a
quick look, it seems to be software supported by Microsoft).

> I do follow the
> https://trac.ffmpeg.org/wiki/CompilationGuide/WinRT#CompilingforWindows10

> and try to just BuildFFmpeg.bat.

Please understand that scripts are not supported here,
only configure lines.

> The first method,the error print is cl is unable to create an executable 
> file.
> C compiler test failed.
> The second method ,the error is

> GNU assembler not found, install/update gas-preprocessor

Did you try this?

> I complie the arch=x64 and x86 is ok and can be used,just
> arch=arm is error.

> All the software is the newest.FFMPEG is version 3.2.2.

This is not the newest FFmpeg, it is ten weeks old.

Carl Eugen
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[FFmpeg-user] Optimizing ProRes speed on a MacPro Trashcan

[Dan Elortegui]

I've written an applescript to take media files off of XDCam cards, rename
them, process them as ProRes and then send them off to our media management
system.  The problem is that there is a step where I have to drop them in a
ProRes watchfolder for them to be processed by Adobe Media Encoder.  This
requires setting up watchfolder settings on each computer.  I'd love to
handle that encode inside my script via FFmpeg.  The issue I've run into is
that Media encoder is almost twice as fast as FFmpeg when creating a
ProRes.  So I'm wondering, are there any ways to speed up the ProRes encode
with flags?  Does quicksync work for ProRes?  I've got AMD FirePro D500
cards.  Any thoughts are appreciated!
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[FFmpeg-user] Optimizing ProRes speed on a MacPro Trashcan

[Dan Elortegui]

I've written an applescript to take media files off of XDCam cards, rename
them, process them as ProRes and then send them off to our media management
system.  The problem is that there is a step where I have to drop them in a
ProRes watchfolder for them to be processed by Adobe Media Encoder.  This
requires setting up watchfolder settings on each computer.  I'd love to
handle that encode inside my script via FFmpeg.  The issue I've run into is
that Media encoder is almost twice as fast as FFmpeg when creating a
ProRes.  So I'm wondering, are there any ways to speed up the ProRes encode
with flags?  Does quicksync work for ProRes?  I've got AMD FirePro D500
cards.  Any thoughts are appreciated!
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Re: [FFmpeg-user] Subtitles with accent marks not being burnt in

[Sean]

>Hi all,
>
>I'm running version N-82966-g6993bb4 of ffmpeg on Windows 7 64-bit:
>
>Burning in subtitles works fine for me, except I notice that lines are omitted 
>if they contain an accent: for example, several lines of subtitles >containing 
>the name "Champs-Elysées" are omitted. (Note the entire line is omitted.)
>
>The command I use is the typical one:
>
>ffmpeg -i input.mkv -vf subtitles=input.srt -vcodec libx264 -acodec ac3 
>output.mp4
>
>I've included my fonts.conf below - perhaps something is missing from it?
>
>Paul

Might be nothing but is the srt saved as Unicode text or ANSI? I have done a 
lot of subtitle burn in with the SubStation Alpha format and text files must be 
in UTF-8 format for it to work.

Sean 

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Re: [FFmpeg-user] issue with [PATCH] avformat/hlsenc: actual segment file size and duration in segment filenames

[Steven Liu]

2017-01-13 0:40 GMT+08:00 Christian Johannesen :

> On Thu, Jan 12, 2017 at 11:32 AM, Christian Johannesen <
> chrisjohanne...@gmail.com> wrote:
>
> >
> >
> > On Thu, Jan 12, 2017 at 1:27 AM, Steven Liu 
> > wrote:
> >
> >>
> >> I have sent a patch to the ffmpeg-devel maillist, you can test it.
> >>
> >
> > I've tested the patch from http://ffmpeg.org/pipermail/
> ffmpeg-devel/2017-
> > January/205706.html on Windows 2012 x64 with msys2. It now works as
> > expected and creates the directory & index.m3u8 with filenames that
> include
> > the size in bytes and duration. Thanks very much for creating the patch!
> >
> > ffmpeg.exe -i D:\media\mix_of_clip_960x540_2128.mp4 -codec copy -f hls
> > -hls_time 6 -hls_list_size 0 -hls_flags second_level_segment_index+
> > second_level_segment_size+second_level_segment_duration -use_localtime 1
> > -use_localtime_mkdir 1 -hls_segment_filename
> "D:\media\mix_of_clip_960x540_
> > 2128\segment_%%04d_%%08s_%%013t.ts" D:\media\mix_of_clip_960x540_
> > 2128\index.m3u8
> > ffmpeg version N-83083-gf7191cc Copyright (c) 2000-2017 the FFmpeg
> > developers
> >   built with gcc 6.2.0 (Rev2, Built by MSYS2 project)
> > ...
> >
> > 01/12/2017  11:31 AM   307,944 segment_0117_00307944_
> > 006006400.ts
> > 01/12/2017  11:31 AM   309,636 segment_0118_00309636_
> > 006006400.ts
> > 01/12/2017  11:31 AM   302,868 segment_0119__
> > 0.ts
> >  121 File(s)117,359,480 bytes
> >
> > Looks like I may have misspoke, the last segment looks to be an issue.
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patch update, and fix it, the problem is in hls_write_trailer for the last
segments.
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Re: [FFmpeg-user] issue with [PATCH] avformat/hlsenc: actual segment file size and duration in segment filenames

[Christian Johannesen]

On Thu, Jan 12, 2017 at 11:32 AM, Christian Johannesen <
chrisjohanne...@gmail.com> wrote:

>
>
> On Thu, Jan 12, 2017 at 1:27 AM, Steven Liu 
> wrote:
>
>>
>> I have sent a patch to the ffmpeg-devel maillist, you can test it.
>>
>
> I've tested the patch from http://ffmpeg.org/pipermail/ffmpeg-devel/2017-
> January/205706.html on Windows 2012 x64 with msys2. It now works as
> expected and creates the directory & index.m3u8 with filenames that include
> the size in bytes and duration. Thanks very much for creating the patch!
>
> ffmpeg.exe -i D:\media\mix_of_clip_960x540_2128.mp4 -codec copy -f hls
> -hls_time 6 -hls_list_size 0 -hls_flags second_level_segment_index+
> second_level_segment_size+second_level_segment_duration -use_localtime 1
> -use_localtime_mkdir 1 -hls_segment_filename "D:\media\mix_of_clip_960x540_
> 2128\segment_%%04d_%%08s_%%013t.ts" D:\media\mix_of_clip_960x540_
> 2128\index.m3u8
> ffmpeg version N-83083-gf7191cc Copyright (c) 2000-2017 the FFmpeg
> developers
>   built with gcc 6.2.0 (Rev2, Built by MSYS2 project)
> ...
>
> 01/12/2017  11:31 AM   307,944 segment_0117_00307944_
> 006006400.ts
> 01/12/2017  11:31 AM   309,636 segment_0118_00309636_
> 006006400.ts
> 01/12/2017  11:31 AM   302,868 segment_0119__
> 0.ts
>  121 File(s)117,359,480 bytes
>
> Looks like I may have misspoke, the last segment looks to be an issue.
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Re: [FFmpeg-user] issue with [PATCH] avformat/hlsenc: actual segment file size and duration in segment filenames

[Christian Johannesen]

On Thu, Jan 12, 2017 at 1:27 AM, Steven Liu  wrote:

>
> I have sent a patch to the ffmpeg-devel maillist, you can test it.
>

I've tested the patch from
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-January/205706.html on
Windows 2012 x64 with msys2. It now works as expected and creates the
directory & index.m3u8 with filenames that include the size in bytes and
duration. Thanks very much for creating the patch!

ffmpeg.exe -i D:\media\mix_of_clip_960x540_2128.mp4 -codec copy -f hls
-hls_time 6 -hls_list_size 0 -hls_flags
second_level_segment_index+second_level_segment_size+second_level_segment_duration
-use_localtime 1 -use_localtime_mkdir 1 -hls_segment_filename
"D:\media\mix_of_clip_960x540_2128\segment_%%04d_%%08s_%%013t.ts"
D:\media\mix_of_clip_960x540_2128\index.m3u8
ffmpeg version N-83083-gf7191cc Copyright (c) 2000-2017 the FFmpeg
developers
  built with gcc 6.2.0 (Rev2, Built by MSYS2 project)
  configuration:
  libavutil  55. 43.100 / 55. 43.100
  libavcodec 57. 72.100 / 57. 72.100
  libavformat57. 62.100 / 57. 62.100
  libavdevice57.  2.100 / 57.  2.100
  libavfilter 6. 69.100 /  6. 69.100
  libswscale  4.  3.101 /  4.  3.101
  libswresample   2.  4.100 /  2.  4.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from
'D:\media\mix_of_clip_960x540_2128.mp4':
  Metadata:
major_brand : isom
minor_version   : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.11.100
  Duration: 00:12:00.68, start: 0.00, bitrate: 1248 kb/s
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv,
bt709), 960x540 [SAR 1:1 DAR 16:9], 1115 kb/s, 23.98 fps, 23.98 tbr, 24k
tbn, 47.95 tbc (default)
Metadata:
  handler_name: VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
  handler_name: SoundHandler
Output #0, hls, to 'D:\media\mix_of_clip_960x540_2128\index.m3u8':
  Metadata:
major_brand : isom
minor_version   : 512
compatible_brands: isomiso2avc1mp41
encoder : Lavf57.62.100
Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p(tv,
bt709), 960x540 [SAR 1:1 DAR 16:9], q=2-31, 1115 kb/s, 23.98 fps, 23.98
tbr, 90k tbn, 23.98 tbc (default)
Metadata:
  handler_name: VideoHandler
Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz,
stereo, fltp, 128 kb/s (default)
Metadata:
  handler_name: SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
  Stream #0:1 -> #0:1 (copy)
Press [q] to stop, [?] for help
[hls @ 00404720] hls->dpp = [0.041711]
frame=17278 fps=15085 q=-1.0 Lsize=N/A time=00:12:00.61 bitrate=N/A speed=
629x
video:98101kB audio:11261kB subtitle:0kB other streams:0kB global
headers:0kB muxing overhead: unknown

 Directory of D:\media\mix_of_clip_960x540_2128

01/12/2017  11:31 AM  .
01/12/2017  11:31 AM  ..
01/12/2017  11:31 AM11,008 index.m3u8
01/12/2017  11:31 AM   470,940
segment__00470940_006049067.ts
01/12/2017  11:31 AM   552,908
segment_0001_00552908_006006400.ts
01/12/2017  11:31 AM   807,836
segment_0002_00807836_006006400.ts
01/12/2017  11:31 AM   895,256
segment_0003_00895256_006006400.ts
01/12/2017  11:31 AM   858,972
segment_0004_00858972_006006400.ts
01/12/2017  11:31 AM   553,660
segment_0005_00553660_006006400.ts
01/12/2017  11:31 AM   488,048
segment_0006_00488048_006006400.ts
01/12/2017  11:31 AM   570,768
segment_0007_00570768_006006400.ts
01/12/2017  11:31 AM   364,720
segment_0008_00364720_006006400.ts
01/12/2017  11:31 AM   435,972
segment_0009_00435972_006006400.ts
01/12/2017  11:31 AM   801,444
segment_0010_00801444_006006400.ts
01/12/2017  11:31 AM   661,384
segment_0011_00661384_006006400.ts
01/12/2017  11:31 AM   607,992
segment_0012_00607992_006006400.ts
01/12/2017  11:31 AM   899,768
segment_0013_00899768_006006400.ts
01/12/2017  11:31 AM 1,095,100
segment_0014_01095100_006006400.ts
01/12/2017  11:31 AM 1,072,164
segment_0015_01072164_006006400.ts
01/12/2017  11:31 AM   916,688
segment_0016_00916688_006006400.ts
01/12/2017  11:31 AM   827,012
segment_0017_00827012_006006400.ts
01/12/2017  11:31 AM 1,098,672
segment_0018_01098672_006006400.ts
01/12/2017  11:31 AM   971,772
segment_0019_00971772_006006400.ts
01/12/2017  11:31 AM   824,380
segment_0020_00824380_006006400.ts
01/12/2017  11:31 AM   710,452
segment_0021_00710452_006006400.ts
01/12/2017  11:31 AM   707,068
segment_0022_00707068_006006400.ts
01/12/2017  11:31 AM 1,019,712
segment_0023_01019712_006006400.ts
01/12/2017  11:31 AM   579,040
segment_0024_00579040_006006400.ts
01/12/2017  11:31 AM   572,084

Re: [FFmpeg-user] Subtitles with accent marks not being burnt in

[Nicolas George]

Le tridi 23 nivôse, an CCXXV, Paul Moloney a écrit :
> The command I use is the typical one:
> 
> ffmpeg -i input.mkv -vf subtitles=input.srt -vcodec libx264 -acodec ac3 
> output.mp4

We need to see the full output for that command.

Regards,

-- 
  Nicolas George


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[FFmpeg-user] Subtitles with accent marks not being burnt in

[Paul Moloney]

Hi all,

I'm running version N-82966-g6993bb4 of ffmpeg on Windows 7 64-bit:


ffmpeg version N-82966-g6993bb4 Copyright (c) 2000-2016 the FFmpeg developers
built with gcc 5.4.0 (GCC)
configuration: --enable-gpl --enable-version3 --enable-dxva2 --enable-libmfx --e
nable-nvenc --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r
 --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libb
s2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enab
le-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --
enable-libopencore-amrwb --enable-libopenh264 --enable-libopenjpeg --enable-libo
pus --enable-librtmp --enable-libsnappy --enable-libsoxr --enable-libspeex --ena
ble-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-amrwbenc --
enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-l
ibx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzimg --ena
ble-lzma --enable-decklink --enable-zlib
libavutil  55. 43.100 / 55. 43.100
libavcodec 57. 70.100 / 57. 70.100
libavformat57. 61.100 / 57. 61.100
libavdevice57.  2.100 / 57.  2.100
libavfilter 6. 68.100 /  6. 68.100
libswscale  4.  3.101 /  4.  3.101
libswresample   2.  4.100 /  2.  4.100
libpostproc54.  2.100 / 54.  2.100
---

Burning in subtitles works fine for me, except I notice that lines are omitted 
if they contain an accent: for example, several lines of subtitles containing 
the name "Champs-Elysées" are omitted. (Note the entire line is omitted.)

The command I use is the typical one:

ffmpeg -i input.mkv -vf subtitles=input.srt -vcodec libx264 -acodec ac3 
output.mp4

I've included my fonts.conf below - perhaps something is missing from it?











   WINDOWSFONTDIR
   C:\Windows\Fonts
   ~/fonts
   .
   ~/.fonts


   
  
 mono
  
  
 monospace
  
   


   
  
 sans serif
  
  
 sans-serif
  
   


   
  
 sans
  
  
 sans-serif
  
   


   conf.d



   WINDOWSTEMPDIR_FONTCONFIG_CACHE
   ~/.fontconfig

   

  
 0x0020   
 0x00A0   
 0x00AD   
 0x034F   
 0x0600   
 0x0601   
 0x0602   
 0x0603   
 0x06DD   
 0x070F   
 0x115F   
 0x1160   
 0x1680   
 0x17B4   
 0x17B5   
 0x180E   
 0x2000   
 0x2001   
 0x2002   
 0x2003   
 0x2004   
 0x2005   
 0x2006   
 0x2007   
 0x2008   
 0x2009   
 0x200A   
 0x200B   
 0x200C   
 0x200D   
 0x200E   
 0x200F   
 0x2028   
 0x2029   
 0x202A   
 0x202B   
 0x202C   
 0x202D   
 0x202E   
 0x202F   
 0x205F   
 0x2060   
 0x2061   
 0x2062   
 0x2063   
 0x206A   
 0x206B   
 0x206C   
 0x206D   
 0x206E   
 0x206F   
 0x2800   
 0x3000   
 0x3164   
 0xFEFF   
 0xFFA0   
 0xFFF9   
 0xFFFA   
 0xFFFB   
  

  
 30
  
   



Paul


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