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• Batch file to add separate audio file to MP4 file [closed]

  30 janvier 2021, par MrRoso

  I have a couple of video files (MP4) with audio in France.
Video1.mp4, Video2.mp4, Video3.mp4, ……
In the same directory, I have the same couple of audio files in English (m4a).
Audio1.m4a, Audio2.m4a, Audio3.m4a, ……

  


  The command

  


  ffmpeg -i "Video1.mp4" -i "Audio1m4a" -map 0 -map 1:a -c copy "Out.mp4"


  


  to add the audio file to the Video file works fine, but I need to do this for each video and audio file manually.

  


  I want to do this in a batch file, like this :

  


  @Echo off
for %%i in (*.MP4) %%j in (*.m4a) do ffmpeg -i "%%i" -i "%%j" -map 0 -map 1:a -codec copy "/new/%%~nI.mp4"


  


  But I get the follow error message :
"% j" cannot be processed syntactically at this point.

  


  Also the new batch file ends in an error :

  


  @Echo off
for /F tokens=i,j %%i in (*.MP4) %%j in (*.m4a) do ffmpeg -i "%%i" -i "%%j" -map 0 -map 1:a -codec  copy "/new/%%~nI.mp4"


  


  Error Message :
"i" cannot be processed syntactically at this point.

  


  Has someone a batch file for me, which is working ?

  


  Best regards

  


• I want FFMPEG generate the m3u8 file with the oldest segments instead of the newest

  4 juin 2021, par Sandi

  I have an FFmpeg command like this :

  


   ffmpeg -i test.mp4 -f hls -hls_time 2 -hls_wrap 10 -hls_list_size 5 test.m3u8


  


  Afaik, hls_wrap is the number of segments we want to store locally and hls_list_size is the segment listed in the m3u8 output file. The command above will generate 10 files of the video segment.

  


  [seg 0][seg 1][seg 2][seg 3][seg 4][seg 5][seg 6][seg 7][seg 8][seg 9]


  


  And inside the test.m3u8, of course, there are 5 newest segments listed.

  


  [seg 5][seg 6][seg 7][seg 8][seg 9]


  


  I want the test.m3u8 lists the oldest available segment instead of the newest. So it should contain :

  


  [seg 0][seg 1][seg 2][seg 3][seg 4]


  


  In another word, I want to preload the segments before it listed in test.m3u8.

  


  The idea is I want to rsync the output of that FFmpeg command to a different folder on the network. I want to avoid test.m3u8 contains a segment that not completely copied because of the large segment size.

  


  Please help me and pardon my English. Thank you very much !

  


• How to speed up m3u8 to mp4 conversion using ffmpeg

  17 décembre 2022, par Sahil Bagdi

  I am downloading mp4 from m3u8 using ffmpeg

  


  ffmpeg -i "https://92vod-adaptive.akamaized.net/exp=1671307488~acl=%2F48b4b587-13d3-42f9-bfb9-8a0c92876523%2F%2A~hmac=66ce19e1dc862e0b718a3eb73b42f54bf83855db43831e146252adccf0dc6f1a/48b4b587-13d3-42f9-bfb9-8a0c92876523/sep/video/67e2046f,8f9cecb7,b83b6682,0f26a563,3c957583/audio/0b5e7d8c,5f37ccc0,60c393d7/subtitles/59401986-English%20%28auto-generated%29-en-x-autogen-cc/master.m3u8?subcache=1&external-subs=1&subtoken=38c45483ebf2c8238ec8504c20207a588d72f633f79608c00f5950d0300576f3&query_string_ranges=1" -c copy -map p:0 "Testing of Hypothesis.mp4"



  


  but it is taking too long, like my speed is 10 MBps(80 mbps) size is 300MB, should be done in 30 seconds, but it takes upto 5-10 minutes sometimes, now I know it does some converting thing

  


  My question is is there any way to increase its speed ??
I have CPU- AMD Ryzen 5600H and
GPU - NVIDIA RTX 3050

  


  Some help will be really appreciated

  


  I checked some nvidia encoding and decoding things from there official website and tried many things from there but always stuck at some error