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• doc/protocols : Re-order HTTP options to match http.c order

  22 avril 2024, par Derek Buitenhuis

  doc/protocols : Re-order HTTP options to match http.c order
  This makes the list easier to maintain.
  Signed-off-by : Derek Buitenhuis <derek.buitenhuis@gmail.com>
  

  • [DH] doc/protocols.texi

• 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".

  


• 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.