Re: [FFmpeg-user] New user question - please

[Patrick Cusack via ffmpeg-user]

I would encourage people in this forum to be critical to the ends of building 
other people up. Iron sharpens iron, but sadly the Participants on this thread 
just care to tear people down. Good luck. This is the last time I’ll be around 
the ffmpeg mailing list. I’m seen too many of these threads. I have real life 
issues to focus on.  I won’t care to chime in again on any issue. And yes, 
asking someone to post their command is the first request everyone makes. 

Good luck guys,

Patrick

Sent from my iPhone

> On Feb 4, 2023, at 8:41 AM, Reindl Harald  wrote:
> 
> 
> 
>> Am 04.02.23 um 17:36 schrieb Phil Rhodes via ffmpeg-user:
>> A word of sanity.
>> If you're someone new to the ffmpeg-user list who's reading this thread and 
>> frowning with concern at Reindl's behaviour, believe me, you're not alone
> 
> well, it was "Dave Blanchard" starting with "I don't have time to familiarize 
> myself with the 6,282,928 special snowflake unique rule systems that every 
> special snowflake community"
> 
> in fact that was the point where this thread got really bad
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Re: [FFmpeg-user] New user question

[Patrick Cusack via ffmpeg-user]

> And how would that help this situation in any way? 

Do you have anything better to do than make snarky comments? The guy posted an 
open ended question without any context. And yes having the command makes a 
difference. I know eff all about HAP and perhaps had he included his command I 
would have had some more context. You could have ignored the thread, instead of 
cheapening the discourse.

Thanks,

Patrick
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Re: [FFmpeg-user] New user question

[Patrick Cusack via ffmpeg-user]

> This is my first time using FFMPEG. We are trying to use it to convert media 
> files to HAP. I loaded the latest version, but when we try to transcode a 
> file, it returns " Unknown encoder 'hap' ". How do I load the hap encoder to 
> the system?

Please include your command that you use for conversion as well as all the 
output.

Patrick
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Re: [FFmpeg-user] PhotoJPEG File doesn't playback properly on Quicktime 7

[Patrick Cusack via ffmpeg-user]

>> I wouldn’t know if this is an ffmpeg or Quicktime 7 issue, but I am 
>> encountering  playback stutter on Quicktime 7 when playing back photo-jpeg 
>> encoded files. I don’t encounter this issue in Quicktime X or with other 
>> players. I only bring this up so I can verify that I am not missing 
>> anything. I am using the following example:
>> 
>> ffmpeg -i moviefile.mov -c:v mjpeg -pix_fmt yuv420p output.mov
>> 
>> How would you recommend I further diagnose this issue?

> please post the complete/unedited command output to the list (see 
> https://ffmpeg.org/mailing-list-faq.html)

I have attached my command line. Again these files only stutter in Quicktime 7. 
Should this be a QT7 issue, then fine, but I would like to know any possibility 
that would cause this.

Thanks

User-MacBook-Pro-2:~ User$ ffmpeg -i 
/Users/User/Documents/Media/1/FF8_SMALL.mov -vf "scale=720x480" -c:v mjpeg 
-pix_fmt yuvj420p output.mov

ffmpeg version N-101101-gc0d0b1c4f6-tessus  https://evermeet.cx/ffmpeg/ 
  Copyright (c) 2000-2021 the FFmpeg developers
 built with Apple clang version 11.0.0 (clang-1100.0.33.17)
 configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus 
--enable-avisynth --enable-fontconfig --enable-gpl --enable-libaom 
--enable-libass --enable-libbluray --enable-libdav1d --enable-libfreetype 
--enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libmysofa 
--enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenh264 
--enable-libopenjpeg --enable-libopus --enable-librubberband --enable-libshine 
--enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora 
--enable-libtwolame --enable-libvidstab --enable-libvmaf 
--enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwebp 
--enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid 
--enable-libzimg --enable-libzmq --enable-libzvbi --enable-version3 
--pkg-config-flags=--static --disable-ffplay
 libavutil  56. 65.100 / 56. 65.100
 libavcodec 58.123.100 / 58.123.100
 libavformat58. 67.100 / 58. 67.100
 libavdevice58. 12.100 / 58. 12.100
 libavfilter 7.106.100 /  7.106.100
 libswscale  5.  8.100 /  5.  8.100
 libswresample   3.  8.100 /  3.  8.100
 libpostproc55.  8.100 / 55.  8.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 
'/Users/User/Documents/Media/1/FF8_SMALL.mov':
 Metadata:
   major_brand : qt  
   minor_version   : 512
   compatible_brands: qt  
   encoder : Lavf58.67.100
 Duration: 00:00:30.03, start: 0.00, bitrate: 36139 kb/s
 Stream #0:0(eng): Video: dnxhd (DNXHD) (AVdn / 0x6E645641), yuv422p(tv, 
bt709/unknown/unknown), 1920x1080, 36139 kb/s, SAR 1:1 DAR 16:9, 23.98 fps, 
23.98 tbr, 23976 tbn, 23976 tbc (default)
   Metadata:
 handler_name: Apple Video Media Handler
 vendor_id   : FFMP
 encoder : DNxHD  709
 timecode: 00:00:00:00
 Stream #0:1(eng): Data: none (tmcd / 0x64636D74), 0 kb/s
   Metadata:
 handler_name: Apple Video Media Handler
 timecode: 00:00:00:00
File 'output.mov' already exists. Overwrite? [y/N] y
Stream mapping:
 Stream #0:0 -> #0:0 (dnxhd (native) -> mjpeg (native))
Press [q] to stop, [?] for help
[swscaler @ 0x7fcb1f4d6000] deprecated pixel format used, make sure you did set 
range correctly
Output #0, mov, to 'output.mov':
 Metadata:
   major_brand : qt  
   minor_version   : 512
   compatible_brands: qt  
   encoder : Lavf58.67.100
 Stream #0:0(eng): Video: mjpeg (jpeg / 0x6765706A), yuvj420p(pc, 
bt709/unknown/unknown, progressive), 720x480 [SAR 32:27 DAR 16:9], q=2-31, 200 
kb/s, 0.04 fps, 11988 tbn (default)
   Metadata:
 handler_name: Apple Video Media Handler
 vendor_id   : FFMP
 timecode: 00:00:00:00
 encoder : Lavc58.123.100 mjpeg
   Side data:
 cpb: bitrate max/min/avg: 0/0/20 buffer size: 0 vbv_delay: N/A
frame=  720 fps=226 q=24.8 Lsize=7871kB time=00:00:29.98 
bitrate=2150.2kbits/s speed=9.43x
video:7867kB audio:0kB subtitle:0kB other streams:0kB global headers:0kB muxing 
overhead: 0.055005%
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[FFmpeg-user] PhotoJPEG File doesn't playback properly on Quicktime 7

[Patrick Cusack via ffmpeg-user]

I wouldn’t know if this is an ffmpeg or Quicktime 7 issue, but I am 
encountering  playback stutter on Quicktime 7 when playing back photo-jpeg 
encoded files. I don’t encounter this issue in Quicktime X or with other 
players. I only bring this up so I can verify that I am not missing anything. I 
am using the following example:

ffmpeg -i moviefile.mov -c:v mjpeg -pix_fmt yuv420p output.mov

How would you recommend I further diagnose this issue?

Patrick 
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Re: [FFmpeg-user] How to use ffmpeg to detect commercials

[Patrick Cusack via ffmpeg-user]

Can I suggest loudness? I know that commercials in the  states have a higher 
sustained volume than program. 

Patrick

Sent from my iPhone

> On Sep 30, 2021, at 3:19 PM, Carl Zwanzig  wrote:
> 
> On 9/30/2021 6:45 AM, Venkateswaran.S wrote:
>> You can easily detect the logo in image using opencv lib
> 
> Yes, but that doesn't indicate much (the logo is often called a "bug" in 
> broadcast).
> 
> 
> Detecting a "change of scene" is not too difficult, but here's the problem- 
> how do you (technically) define a commercial? Then, how do you generally tell 
> that apart from other programming?
> 
> Most network programming will have a bug, but not all the time.
> That bug may move around from stream/channel to stream/channel.
> Often commercials have louder audio (where "louder" is a bit vague), and are 
> more likely to be mono or 2.0 stereo instead of 3.1/5.1 stereo.
> Old programs, and lots of locally produced programs, usually have mono audio.
> etc etc
> 
> Once someone details the characteristics to separate "What I want to see" 
> (programs) from "What I don't want to see" (commercials), then we can then 
> discuss methods.
> 
> Later,
> 
> z!
> 
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Re: [FFmpeg-user] Detailed list of supported codecs in FFMPEG

[Patrick Cusack via ffmpeg-user]

If you are running the ffmpeg binary, you can run ffmpeg -decoders or -encoders 
to get a list of all formats supported.

> On Jun 1, 2020, at 5:03 AM, rohit khali  wrote:
> 
> Hi All,
> 
> 
> 
> I am doing feasibility analysis to integrate FFMPEG libraries into my
> decoder application hence looking for a detailed list of supported audio
> video codecs including corresponding profile and level support.
> 
> Is there any official page where I can find all this information?
> 
> 
> 
> Thanks,
> 
> Rohit Khali
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Re: [FFmpeg-user] Resizing result with nearest neighbour is highly compressed

[Patrick Cusack via ffmpeg-user]

Nearest neighbor will make it blocky. Maybe you want bilinear?


> On May 22, 2020, at 5:15 AM, Moritz Barsnick  wrote:
> 
> On Fri, May 22, 2020 at 13:52:40 +0200, Nick wrote:
>> I'm trying to resize a .mp4 video with FFmpeg but the result is artifacted
>> to hell and back, how can I fix it?
> 
> To be honest, I see the same artifacts in the original.
> (I dumped single frames losslessly to PNG and viewed them full-screen.
> Note that that last step of full-screen scaling obviously also uses
> some algorithm. But regardless of smoothing or not, I see artifacts.)
> 
>>> ffmpeg -i C:\Users\Asus\Desktop\0001-0024.mp4 -vf
>>> scale=1120:1120:flags=neighbor C:\Users\Asus\Desktop\out.mp4 -aac_tns
> 
> We usually appreciate the complete, uncut console output, which also
> saves us from actually reproducing, just to see e.g. that you are
> scaling *up*).
> 
> And that "-aac_tns" in your command line surely is a mistake. ;-)
> 
> Moritz
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