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• FFMPEG to command not working as i intend [closed]

  11 mai 2023, par KillerHaseTV

  I want to cut my video by using timestamps. I have a txt file with my timestamps and I put them in the correct variables. For example, $startzeit = 00:00:01 and $endzeit = 00:00:10. So, I want :01 -> :10 and not :01 and run for 10 seconds until :11.

  


  The problem has something to do with "-to" because the timestamps are correct.

  


  Here is my code

  


  $segment = 0
$pathtxt = "D:\Streamshit\Stream\Videos schneiden\timestamps.txt"
$pathvideo = "D:\Streamshit\Stream\Videos schneiden\2023-05-04_18-59-45.mkv"
$zeile = (Get-Content -LiteralPath $pathtxt).Length
$segment_list = @(Get-Content -LiteralPath $Pathtxt)

while($segment -lt $zeile){

    $timestamp = $segment_list[$segment].split(",")
    $startzeit = $timestamp[0]
    $endzeit = $timestamp[1]
    $TEST = "D:\Streamshit\Stream\Videos schneiden\Clips\video$segment.mp4"
    $segment++    
    ffmpeg -ss $startzeit -i $pathvideo -to $endzeit -c copy $TEST 
}


  


  and here are my timestamps :

  


  00:00:01,00:00:10
00:00:24,00:00:41
00:01:29,00:01:42
00:02:19,00:02:46
00:04:11,00:04:58
00:08:38,00:08:42
00:10:05,00:10:14
00:12:07,00:14:47
00:16:59,00:17:20
00:26:31,00:27:00
00:34:36,00:36:56
00:39:01,00:39:21
00:46:32,00:46:53
00:48:00,00:48:58
00:51:11,00:52:01
00:56:15,00:57:52
00:59:20,01:01:20
01:03:21,01:03:40
01:12:02,01:12:17
01:14:48,01:14:59
01:15:13,01:19:03
01:19:14,01:19:23
01:23:49,01:24:06
01:24:23,01:24:50
01:25:13,01:26:10
01:26:45,01:26:56
01:29:08,01:29:29
01:31:54,01:32:10
01:36:32,01:37:41
01:39:37,01:39:53
01:55:30,01:56:02
02:13:07,02:13:44
03:12:19,03:12:50


  


  I already tried it with just -t which is normally doing what my code is doing and -to should do what I want, but it doesn't.

  


• How to put the output of ffmpeg into a pipe in Python ? [duplicate]

  16 février 2023, par Eric Palmer

  I'm trying to use python to feed the results of ffmpeg into a pipeline, and then I can use this pipeline for subsequent operations (such as rtmp streaming). I've written the correct command, but I don't know how to accomplish this with Python.

  


  I wrote the following code in the Shell, it can run correctly.

  


  ffmpeg -re -i '2023-02-16_21:02:50.mp4' -f mpegts -c:v copy -c:a aac -vbsf h264_mp4toannexb pipe:1.ts | cat >> push


  


  When I'm trying to do the above in Python, I'm getting an error.

  


  cat: '>>': No such file or directory


  


  Here is my python code.

  


  command = [
    'docker',
    'run',
    '-v',
    f'{cwd}:{cwd}',
    '-w',
    f'{cwd}',
    'jrottenberg/ffmpeg',
    '-re',
    '-i', f'{video_path}',
    '-f', 'mpegts',
    '-c:v', 'copy',
    '-c:a', 'aac',
    '-vbsf', 'h264_mp4toannexb',
    'pipe:1.ts',
]

pa = subprocess.Popen(
    command,
    stdout = subprocess.PIPE,
    stderr = error_file
)

command = [
    'cat',
    '>>',
    f'{pipe_name}'
]

with pa.stdout:
    pb = subprocess.Popen(
        command,
        stdin = pa.stdout,
        stdout = error_file,
        stderr = error_file
    )


  


• change audio part from mkv video file to flac audio file without losing quality [closed]

  29 août 2023, par Jimmy wu

  how could I write a Linux command to manipulate ffmpeg to change audio part from mkv video file to flac audio file without losing quality ?

  


  I use following command and I found that the size of audio file is almost the same as video file.

  


  ffmpeg -i "2023-08-28 15-32-02.mkv" -ss 0:0:0 -to 1:9:2

8 -vn -c:a flac 2023_08_28_CPU_DV_1.flac


  


  what command should I use ?

  


  I want to change "only audio part" from mkv video file to flac audio file without losing quality,

  


  then the size of file would not be that big