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• ffmpeg : `ffmpeg -i "/video.mp4" -i "/audio.m4a" -c copy -map 0:v:0 -map 1:a:0 -shortest "/nu.mp4"` truncates, how to loop audio to match videos ? [closed]

  18 avril 2024, par Swudu Susuwu

  This is with "FFmpeg Media Encoder" from Google Store (Linux-based Android OS), but it has all the commands of ffmpeg for normal Linux.

  


  -shortest truncates the video to match the audio, and -longest has the last half of the video not have audio (for videos twice as long as audio,)

  


  what to use to loop audio (to match length of video with this) ?

  


  Video length is 15:02, so used ffmpeg -i "/audio.m4a" -c copy -map 0:a:0 "/audionew.m4a"-t 15:02 -stream_loop -1`, but got errors.

  


• os.environ['PATH'] doesn't match echo %PATH%

  10 février 2018, par Sergey

  I have PATH variable set for ffmpeg which I tested with CMD command echo %PATH% but Python’s os.environ['PATH'] doesn’t contain registry of it. I’m using Jupyter notebook on Windows.

• PHP FFMPEG match the Instagram Video Requirements

  19 février 2021, par Linesofcode

  This are the Instagram requirements in order to upload a video :

  


  - Container: MOV or MP4 (MPEG-4 Part 14), no edit lists, moov atom at the front of the file.
- Audio codec: AAC, 48khz sample rate maximum, 1 or 2 channels (mono or stereo).
- Video codec: HEVC or H264, progressive scan, closed GOP, 4:2:0 chroma subsampling.
- Frame rate: 23-60 FPS.
- Picture size:
  - Maximum columns (horizontal pixels): 1920
  - Minimum aspect ratio [cols / rows]: 4 / 5
  - Maximum aspect ratio [cols / rows]: 16 / 9
  - Video bitrate: VBR, 5Mbps maximum
- Audio bitrate: 128kbps
- Duration: 60 seconds maximum, 3 seconds minimum
- File size: 100MB maximum


  


  I'm using the https://github.com/PHP-FFMpeg/PHP-FFMpeg library and I'm able to get the metadata of the video this way :

  


  $ffprobe = \FFMpeg\FFProbe::create();
$video = $ffprobe->streams('my_sample_video.mp4')->videos()->first();
$audio = $ffprobe->streams('my_sample_video.mp4')->audios()->first();


  


  Printing $video & $audio returns respectively the following data :

  


  --- video ---
[index] => 0
[codec_name] => h264
[codec_long_name] => H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
[profile] => Baseline
[codec_type] => video
[codec_time_base] => 1/1200
[codec_tag_string] => avc1
[codec_tag] => 0x31637661
[width] => 848
[height] => 480
[coded_width] => 848
[coded_height] => 480
[has_b_frames] => 0
[sample_aspect_ratio] => 0:1
[display_aspect_ratio] => 0:1
[pix_fmt] => yuv420p
[level] => 31
[color_range] => tv
[color_space] => bt709
[color_transfer] => bt709
[color_primaries] => bt709
[chroma_location] => left
[refs] => 1
[is_avc] => 1
[nal_length_size] => 4
[r_frame_rate] => 25/1
[avg_frame_rate] => 25/1
[time_base] => 1/600
[start_pts] => 0
[start_time] => 0.000000
[duration_ts] => 57888
[duration] => 96.480000
[bit_rate] => 1436391
[bits_per_raw_sample] => 8
[nb_frames] => 2412

--- audio ---
[index] => 1
[codec_name] => aac
[codec_long_name] => AAC (Advanced Audio Coding)
[profile] => LC
[codec_type] => audio
[codec_time_base] => 1/44100
[codec_tag_string] => mp4a
[codec_tag] => 0x6134706d
[sample_fmt] => fltp
[sample_rate] => 44100
[channels] => 2
[channel_layout] => stereo
[bits_per_sample] => 0
[r_frame_rate] => 0/0
[avg_frame_rate] => 0/0
[time_base] => 1/44100
[start_pts] => 0
[start_time] => 0.000000
[duration_ts] => 4255744
[duration] => 96.502132
[bit_rate] => 62026
[max_bit_rate] => 64000
[nb_frames] => 4156


  


  Some things are easy to verify like the Video Codec, Audio Codec & Duration, but how to I manage to verify the rest ?

  


  I also noticed that all the MP4 & MOV video samples I use, the metadata of codec_long_name always returns "MPEG-4 part 10" and the requirement is "MPEG-4 Part 14".