February 2024 - ffmpeg-user - lists.ffmpeg.org

Big missmatch In format duration (ffmpeg V6)
by Avraham Sikirov 22 Jul '24

22 Jul '24

Hey, I am trying to upgrade from ffmpeg v5 to v6, I have noticed one video that has big increase in format duration time This is the command I use: ffprobe -v error -print_format json -show_format -show_streams too-many-packets.mp4 Link to video and outputs: https://drive.google.com/drive/folders/1BT6NMqZ2pSd-shbu-hok-2-Gaihn0Av2?us…

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How to create error log file ffmpeg Loudnorm?
by CMG DiGiTaL 26 Apr '24

26 Apr '24

hi, I created a bat file where I enter the LUFS values to cover several audio files in a folder. However, I would like to generate an error log file. I used the command -report file=log.txt:level=16. see below the command in my bat file: md "C:\Users\%username%\Desktop\Normalizing_lufs" pushd "%Userprofile%\Desktop\áudios LUFS" FOR /F "delims=" %%a in ('where .:*.mp3 ^|findstr /vi "_LOUDNORM _EBU"') DO ( SET "filename=%%~na" ffmpeg -hide_banner -i "%%a" -af "[0:a]loudnorm=print_format=summary" -f null NUL 2> "%%~na.log" @FOR /F "tokens=3" %%b IN ('FINDSTR /C:"Input Integrated" "%%~na.log"') DO (SET II=%%b) @FOR /F "tokens=4" %%b IN ('FINDSTR /C:"Input True Peak" "%%~na.log"') DO (SET ITP=%%b) @FOR /F "tokens=3" %%b IN ('FINDSTR /C:"Input LRA" "%%~na.log"') DO (SET ILRA=%%b) @FOR /F "tokens=3" %%b IN ('FINDSTR /C:"Input Threshold" "%%~na.log"') DO (SET IT=%%b) @FOR /F "tokens=3" %%b IN ('FINDSTR /C:"Target Offset" "%%~na.log"') DO (SET TO=%%b) DEL "%%~na.log" SETLOCAL ENABLEDELAYEDEXPANSION REM ECHO !II! Input Integrated REM ECHO !ITP! Input True Peak REM ECHO !ILRA! Input LRA REM ECHO !IT! Input Threshold REM ECHO !TO! Target Offset FOR /F "tokens=1,2 delims=," %%b IN ('ffprobe -v 0 -select_streams a -show_entries "stream=bit_rate,sample_rate" -of "csv=p=0" "!filename!.mp3"') DO ( ffmpeg -hide_banner *-report file=log.txt:level=16* -i "!filename!.mp3" -af "loudnorm=linear=true:I=!_vLUF!:LRA=11:tp=!_vPEAK!:measured_I=!II!:measured_LRA=!ILRA!:measured_tp=!ITP!:measured_thresh=!IT!:offset=!TO!:print_format=summary" -c:v copy -id3v2_version 3 -metadata:s:v title="Album cover" -metadata:s:v comment="Cover (front)" -acodec mp3 -b:a %%c -ar:a %%b "C:\Users\%username%\Desktop\Normalizing_lufs\!filename!.mp3" ) ENDLOCAL and see the error below: Successfully opened the file. Parsing a group of options: output url file=log.txt:level=16. Successfully parsed a group of options. Opening an output file: file=log.txt:level=16. [NULL @ 000002738af86200] Unable to find a suitable output format for 'file=log.txt:level=16' file=log.txt:level=16: Invalid argument PS: The log files are generated, but the program cancels and does not convert the audio files!

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ISSUE ABOUT EXTRACTING
by Hervé ANSELME 01 Mar '24

01 Mar '24

Hello all, using release 6.1 of ffmpeg, I have an issue about extracting a part from a mkv video, into another mkv video. If it can help, there are a few infos about the source video (the video from which I extract) ; infos provided by the VLC MEDIA PLAYER software : [cid:e9bf5d83-4a7e-410b-b522-08d2d7c75fc1] I use the command to extract from "position" (if we can say so) 1320 seconds to "position" 3183 seconds : ffmpeg.exe -i "C:\temp\source video.mkv" -ss 1320 -to 3183 -codec copy "D:\temp\new video.mkv" and in the new video, at the beginning, there are a few seconds missing (about 2-3 seconds) : a few seconds I see in the source video, but not in the new video. Does anybody have an idea about a way to solve it ? Please let me know if you require another technical infos, to help ; thanks in advance. Regards, HA [https://s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-round-oran…]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Sans virus.www.avast.com<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…>

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Streams
by Mark Filipak 29 Feb '24

29 Feb '24

Well, the attachment, which was only 50kB, got stripped off. I'm trying again. Hi All, I'm taking a break from my "errors in trimming and concatenation" pursuits. I've attached a single-page HTML about streams. ...this will eventually be FFmpeg documentation if possible, _not_ a book... If you see anything wrong or questionable about it -- anything at all, no matter how small -- kindly let me know. I've approached this from pixels to PS/TS, building up, rather than the usual PS/TS to pixels, pulling apart. I think it works better that way. --Mark.

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Streams
by Mark Filipak 29 Feb '24

29 Feb '24

Hi All, I'm taking a break from my "errors in trimming and concatenation" pursuits. I've attached a single-page HTML about streams. ...this will eventually be FFmpeg documentation if possible, _not_ a book... If you see anything wrong or questionable about it -- anything at all, no matter how small -- kindly let me know. I've approached this from pixels to PS/TS, building up, rather than the usual PS/TS to pixels, pulling apart. I think it works better that way. --Mark.

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srt subtitle to dvbsub for mpegts stream
by William C Bonner 29 Feb '24

29 Feb '24

I am transferring mkv video files from my pc to my TiVo using the mpegts container format. I’m trying to find a way to include optional subtitles in the stream but haven’t been able to find a way to convert text subtitles to raster image subtitles. I would have thought that there was a way, considering https://trac.ffmpeg.org/wiki/HowToBurnSubtitlesIntoVideo has a way to overlay text subtitles directly on the video and reencode it. It would seem that I should be able to create a new stream with the encoded text. I’ll include specific commands that I’ve tried if makes a difference in any suggestions. I’m using a recent build of FFMPEG on windows, but can run on a different platform to figure out what’s necessary. Thanks, Wim.

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ISSUE ABOUT libmp3lame AUDIO CODEC
by Hervé ANSELME 29 Feb '24

29 Feb '24

Hello all, I have an issue with the libmp3lame audio codec, when recoding movies with ffmpeg release 6.1 (for information, the image part of the movie, is re-encoded with the libx265 codec). At certain points in the film, the sound "crackles" quite loudly (something like : crrrr ... crrrr ...) for a few seconds, before returning to "normal" (the sound no longer crackles) ; then a few minutes later, the same thing happens again, and so on throughout the film. In the command line, I use the following parameters for the sound : -acodec libmp3lame -ar 48k -b:a 128k -q:a 3 Does anyone have any idea what causes these cracking effects ? Is this because my command line is missing some parameters, and if so, which ones ? Is it because the settings I've made for the soundtrack (see above) aren't right ? If so, how do I change them ? Don't hesitate to let me know if you need any further technical information ; thank you in advance for your advice and help. Regards, HA [https://s-install.avcdn.net/ipm/preview/icons/icon-envelope-tick-round-oran…]<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…> Sans virus.www.avast.com<https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campai…>

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Bitrate 0
by Sheraz Ali Shah 29 Feb '24

29 Feb '24

Hi @ffmpeg-user@ffmpeg.org<mailto:ffmpeg-user@ffmpeg.org> I have a live dash stream which I am feeding to ffmpeg which is giving bitrate 0 and not the correct value DASH Stream :- http://wowzaec2demo.streamlock.net/live/bigbuckbunny/manifest_mvtime2222.mpd I am using FFmpeg version 4.3.1 Thanks and Regards Sheraz Ali Shah CONFIDENTIALITY: The contents of this e-mail are confidential and intended only for the above addressee(s). If you are not the intended recipient, or the person responsible for delivering it to the intended recipient, copying or delivering it to anyone else or using it in any unauthorized manner is prohibited and may be unlawful. If you receive this e-mail by mistake, please notify the sender and the systems administrator at straymail(a)rt-rk.com immediately.

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Compile FFmpeg on RHEL 9
by Mayiani, Martin Martine - mayianmm 28 Feb '24

28 Feb '24

Hello, I am new to ffmpeg and when I am compiling it on RHEL 9 I get this error. "Unable to create and execute files in /tmp. Set the TMPDIR environment variable to another directory and make sure that it is not mounted noexec." Sanity test failed." Thanks Martin

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SLOWNESS WITH LIBX265 CODEC
by Hervé ANSELME 28 Feb '24

28 Feb '24

Hello all, I have a question about libx265 codec I use to re-encode video ; by the way I use the 6.1 release of ffmpeg, running on Windows 11 Family OS. The output file ( re-encoded film ) created in MP4 format has a quite good audio/video quality ; but the process took quite a long time to execute : for a source film which length (or movie duration) is 1 h 32 min, the re-encoding process took 1 h 12 min. Here is the command line I used to create the output film : ffmpeg.exe -loglevel error -sn -i "D:\temp\input_film.mkv" -map 0:v:0 -map 0:a:0 -acodec libmp3lame -ar 48k -b:a 128k -q:a 3 -vcodec libx265 -vf scale=720:520 -sws_flags lanczos+accurate_rnd -b:v 1200k -minrate 1200k -maxrate 1200k -r 25 -qscale:v 2 -x265-params "nal-hrd=cbr:force-cfr=1:vbv-maxrate=1200:vbv-bufsize=1800 " -log_level -1 "C:\temp\output_film.mp4" -bufsize 1843200 In my command line, do anybody see parameter(s) which should be fixed, in order to reduce process duration, if possible with keeping the quality of the output file ? Or maybe there are excess parameter(s) in my command line, in order to reduce process duration ? If so, which parameter(s) ? Or maybe there are missing parameter(s) in my command line, in order to reduce process duration ? If so, which parameter(s), and how this (these) parameter(s) should be configured ? Thanks for your help. Regards, HA

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