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• Files dissapearing with ffmpeg recursive conversion

  13 août 2014, par CaRoXo

  I started in askubuntu, asking for a way to convert recursively more than 14K of wma to mp3 extracting the wma files path from a txt file.
  There was an answer that could cover my needs, but a bug appears. The first run with some hundreds worked ok. The second, some wma albums got converted, others entirely deleted. There were some modifications. And last time completely, deleted all wma without converting.

  this was the original script

  #!/usr/bin/env bash
  
  
  
  readarray -t files < wma-files.txt
  
  
  
  for file in "${files[@]}"; do
  
      out=`echo $file | sed "s:wma:mp3:"`
  
      probe=`avprobe -show_streams "$file" 2>/dev/null`
  
      rate=`echo "$probe" | grep "bit_rate" | sed "s:.*=\(.*\)[0-9][0-9][0-9][.].*:\1:"`
  
      avconv -i "$file" -ab "$rate"k "$out"
  
      rm "$file"
  
  done

  Then the adaptation with ffmpeg

  #!/usr/bin/env bash
  
  
  
  readarray -t files < wma-files.txt
  
  
  
  for file in "${files[@]}"; do
  
      out=`echo $file | sed "s:wma:mp3:"`
  
      probe=`avprobe -show_streams "$file" 2>/dev/null`
  
      rate=`echo "$probe" | grep "bit_rate" | sed "s:.*=\(.*\)[0-9][0-9][0-9][.].*:\1:"`
  
      ffmpeg -i "$file" -ab "$rate"k "$out" && rm "$file"
  
  done

  With the first one I converted many files. Other just get deleted. The ones deleted were always the same release (so, all tracks from a release). I can listen, and even convert them with Soundkonverter.

  Both of them produces "no such file of directory" and when this happens, everything get deleted.

  The partition where files are stored is a usb HDD ntfs, but also happens in my ext4 internal HD.
  Im under Xubuntu 14.04

  Here the script running with avconv (wich what i managed to convert some, but other get dissapeared) http://pastebin.com/w5weqEws and with ffmpeg (that didn’t convert any) http://pastebin.com/3QkaPzvW

  I can’t find differences between successfully and deleted original wma’s. But for example, while other progs like beets read and write the tags, puddletag and mp3tag (under wine) don’t, until I converted them with soundkonverter.

  As the person trying to help me there redirect me here on the original post http://askubuntu.com/questions/508278/how-to-use-ffmpeg-to-convert-wma-to-mp3-recursively-importing-from-txt-file/508304#508304
  Im here asking for any help to make run an script like this. Or any to use ffmpeg to convert recursively the audio files. My capacity of understanding is short for being able to make something working just reading the docs.

  So I ask a help to run this. If I miss any relevant information, just tell me.

  NOTE : I want to add that doing the conversion with

  for file in "${files[@]}"; do
  
      out=`echo "$file" | sed s:wma:mp3:`
  
      avconv -i "$file" -ab 192k "$out"
  
      rm "$file"
  
  done

  It works in the same files (the ones that are deleted with the other). Only that it makes everything to 192k, so not good if Im converting lower bitrate ones. And get this error "Application provided invalid, non monotonically increasing dts to muxer in stream 0" that seems something typical from avconv in 14.04. With ffmpeg I cant try becouse I don’t find the way how to use it, even out of the script. I really don’t understand the docs seems
  .

  NOTE2 : This is a mediainfo exit from :

  1- A typical wma that get dissapeared always with the script

  Audio
  
  ID                                       : 1
  
  Format                                   : WMA
  
  Format version                           : Version 2
  
  Codec ID                                 : 161
  
  Codec ID/Info                            : Windows Media Audio
  
  Description of the codec                 : Windows Media Audio 9 - 128 kbps, 44 kHz, stereo 1-pass CBR
  
  Duration                                 : 2mn 25s
  
  Bit rate mode                            : Constant
  
  Bit rate                                 : 128 Kbps
  
  Channel(s)                               : 2 channels
  
  Sampling rate                            : 44.1 KHz
  
  Bit depth                                : 16 bits
  
  Stream size                              : 2.21 MiB (99%)
  
  Language                                 : English (US)

  2- A Wma that got succesfully converted (yes Im using copies now, I cant risk specially some rares audios that I got on the road)

  Audio
  
  ID                                       : 1
  
  Format                                   : WMA
  
  Format version                           : Version 2
  
  Codec ID                                 : 161
  
  Codec ID/Info                            : Windows Media Audio
  
  Description of the codec                 : Windows Media Audio 9 - 128 kbps, 44 kHz, stereo 1-pass CBR
  
  Duration                                 : 4mn 35s
  
  Bit rate mode                            : Constant
  
  Bit rate                                 : 128 Kbps
  
  Channel(s)                               : 2 channels
  
  Sampling rate                            : 44.1 KHz
  
  Bit depth                                : 16 bits
  
  Stream size                              : 4.21 MiB (99%)
  
  Language                                 : English (US)

  So, as I don’t see difference, but maybe, I’m losing any data to look into ?

• HLS MP4 Independent Segments

  18 juillet 2017, par Mido

  Long story short : Why HLS can’t just play normal MP4 files together one after one ? Why need to segment media file into .ts segments ?

  Details :

  We’ve segmented MP4 file into mini MP4 segments (not TS), each one about 30 seconds for testing. It never plays in any HLS player, just loading all segment files then nothing happens.

  Example MP4 segment Info :

  Format                      : MPEG-4
  
  Format profile              : Base Media
  
  Codec ID                    : isom
  
  File size                   : 1.44 MiB
  
  Duration                    : 32s 950ms
  
  Overall bit rate            : 366 Kbps
  
  Writing application         : Lavf56.25.101
  
  
  
  Video
  
  ID                          : 1
  
  Format                      : AVC
  
  Format/Info                 : Advanced Video Codec
  
  Format profile              : High@L4.1
  
  Format settings, CABAC      : Yes
  
  Format settings, ReFrames   : 6 frames
  
  Codec ID                    : avc1
  
  Codec ID/Info               : Advanced Video Coding
  
  Duration                    : 32s 950ms
  
  Bit rate                    : 230 Kbps
  
  Width                       : 426 pixels
  
  Height                      : 240 pixels
  
  Display aspect ratio        : 16:9
  
  Original display aspect rat : 16:9
  
  Frame rate mode             : Constant
  
  Frame rate                  : 23.976 fps
  
  Color space                 : YUV
  
  Chroma subsampling          : 4:2:0
  
  Bit depth                   : 8 bits
  
  Scan type                   : Progressive
  
  Bits/(Pixel*Frame)          : 0.094
  
  Stream size                 : 925 KiB (63%)
  
  Writing library             : x264 core 142 r2495 6a301b6
  
  
  
  Audio
  
  ID                          : 2
  
  Format                      : AAC
  
  Format/Info                 : Advanced Audio Codec
  
  Format profile              : LC
  
  Codec ID                    : 40
  
  Duration                    : 32s 896ms
  
  Bit rate mode               : Constant
  
  Bit rate                    : 129 Kbps
  
  Channel(s)                  : 2 channels
  
  Channel(s)_Original         : 6 channels
  
  Channel positions           : Front: L C R, Side: L R, LFE
  
  Sampling rate               : 48.0 KHz
  
  Compression mode            : Lossy
  
  Stream size                 : 517 KiB (35%)

  The Master M3U8 :

  #EXTM3U
  
  #EXT-X-VERSION:7
  
  #EXT-X-INDEPENDENT-SEGMENTS
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=426x240,BANDWIDTH=370000,CODECS="avc1.640015,mp4a.40.2"
  
  240p.m3u8
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=640x360,BANDWIDTH=580000,CODECS="avc1.640015,mp4a.40.2"
  
  360p.m3u8
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=896x504,BANDWIDTH=900000,CODECS="avc1.640015,mp4a.40.2"
  
  480p.m3u8
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=1280x720,BANDWIDTH=1500000,CODECS="avc1.640015,mp4a.40.2"
  
  720p.m3u8

  240p.m3u8

  #EXTM3U
  
  #EXT-X-VERSION:7
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXT-X-TARGETDURATION:34
  
  
  
  #EXTINF:33.033033,
  
  240p000.mp4
  
  #EXTINF:33.533534,
  
  240p001.mp4
  
  #EXTINF:24.941608,
  
  240p002.mp4
  
  #EXTINF:28.611945,
  
  240p003.mp4
  
  #EXT-X-ENDLIST

  When tested with HLS.js, gives this error :

  Parsing Error:no demux matching with content found,cannot recover,
  last media error recovery failed ...

  Bitmovin Player : loads all segments of all variants and never plays any of them. just stop.

  Tested on Chrome & Firefox On Windows, Safari on Mac, Android and iPad Browsers. Never works on any of them. Are we doing anything wrong ?!

• HLS MP4 Independent Segments

  7 décembre 2016, par Mido

  Long story short : Why HLS can’t just play normal MP4 files together one after one ? Why need to segment media file into .ts segments ?

  Details :

  We’ve segmented MP4 file into mini MP4 segments (not TS), each one about 30 seconds for testing. It never plays in any HLS player, just loading all segment files then nothing happens.

  Example MP4 segment Info :

  Format                      : MPEG-4
  
  Format profile              : Base Media
  
  Codec ID                    : isom
  
  File size                   : 1.44 MiB
  
  Duration                    : 32s 950ms
  
  Overall bit rate            : 366 Kbps
  
  Writing application         : Lavf56.25.101
  
  
  
  Video
  
  ID                          : 1
  
  Format                      : AVC
  
  Format/Info                 : Advanced Video Codec
  
  Format profile              : High@L4.1
  
  Format settings, CABAC      : Yes
  
  Format settings, ReFrames   : 6 frames
  
  Codec ID                    : avc1
  
  Codec ID/Info               : Advanced Video Coding
  
  Duration                    : 32s 950ms
  
  Bit rate                    : 230 Kbps
  
  Width                       : 426 pixels
  
  Height                      : 240 pixels
  
  Display aspect ratio        : 16:9
  
  Original display aspect rat : 16:9
  
  Frame rate mode             : Constant
  
  Frame rate                  : 23.976 fps
  
  Color space                 : YUV
  
  Chroma subsampling          : 4:2:0
  
  Bit depth                   : 8 bits
  
  Scan type                   : Progressive
  
  Bits/(Pixel*Frame)          : 0.094
  
  Stream size                 : 925 KiB (63%)
  
  Writing library             : x264 core 142 r2495 6a301b6
  
  
  
  Audio
  
  ID                          : 2
  
  Format                      : AAC
  
  Format/Info                 : Advanced Audio Codec
  
  Format profile              : LC
  
  Codec ID                    : 40
  
  Duration                    : 32s 896ms
  
  Bit rate mode               : Constant
  
  Bit rate                    : 129 Kbps
  
  Channel(s)                  : 2 channels
  
  Channel(s)_Original         : 6 channels
  
  Channel positions           : Front: L C R, Side: L R, LFE
  
  Sampling rate               : 48.0 KHz
  
  Compression mode            : Lossy
  
  Stream size                 : 517 KiB (35%)

  The Master M3U8 :

  #EXTM3U
  
  #EXT-X-VERSION:7
  
  #EXT-X-INDEPENDENT-SEGMENTS
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=426x240,BANDWIDTH=370000,CODECS="avc1.640015,mp4a.40.2"
  
  240p.m3u8
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=640x360,BANDWIDTH=580000,CODECS="avc1.640015,mp4a.40.2"
  
  360p.m3u8
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=896x504,BANDWIDTH=900000,CODECS="avc1.640015,mp4a.40.2"
  
  480p.m3u8
  
  
  
  #EXT-X-STREAM-INF:RESOLUTION=1280x720,BANDWIDTH=1500000,CODECS="avc1.640015,mp4a.40.2"
  
  720p.m3u8

  240p.m3u8

  #EXTM3U
  
  #EXT-X-VERSION:7
  
  #EXT-X-MEDIA-SEQUENCE:0
  
  #EXT-X-PLAYLIST-TYPE:VOD
  
  #EXT-X-TARGETDURATION:34
  
  
  
  #EXTINF:33.033033,
  
  240p000.mp4
  
  #EXTINF:33.533534,
  
  240p001.mp4
  
  #EXTINF:24.941608,
  
  240p002.mp4
  
  #EXTINF:28.611945,
  
  240p003.mp4
  
  #EXT-X-ENDLIST

  When tested with HLS.js, gives this error :

  Parsing Error:no demux matching with content found,cannot recover,
  last media error recovery failed ...

  Bitmovin Player : loads all segments of all variants and never plays any of them. just stop.

  Tested on Chrome & Firefox On Windows, Safari on Mac, Android and iPad Browsers. Never works on any of them. Are we doing anything wrong ?!