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• Ffmpeg and ffprobe not showing subtitles stream in m3u8 file

  3 juin 2021, par DanielVip3

  I'm trying to get an mp4 video from a m3u8 playlist file (in simple HLS), with audio, video and subtitles.

  


  I've managed to extract the video and audio stream because they are relatively easy : the input m3u8, according to ffprobe, contains 3 different programs, and the third program (called Program 2) is the one I need, because it contains both the highest quality video and the English highest quality audio.

  


  So, what I really am doing is

  


  ffmpeg -i "blahblah.m3u8" -c copy -map 0:p:2:v:0 -map 0:p:2:a:m:language:eng -map 0:s:0 "output.mp4"


  


  Which means : select the first video stream for the third (index 2) program and the English language audio stream from the same third (index 2) program.

  


  My problem is : I can't seem to find the two subtitles streams.
The m3u8 has two subtitles : English and Spanish, as you can see in the m3u8 itself

  


  #EXTM3U
# Created with Bento4 mp4-hls.py version 1.2.0r637

#EXT-X-VERSION:4

# Subtitles
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subtitles",NAME="English",LANGUAGE="en",URI="subtitles/en/subtitles.m3u8"
#EXT-X-MEDIA:TYPE=SUBTITLES,GROUP-ID="subtitles",NAME="Español",LANGUAGE="es",URI="subtitles/es/subtitles.m3u8"

# Audio
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio_aac",NAME="Français",LANGUAGE="fra",AUTOSELECT=YES,DEFAULT=YES,URI="audio/aac/fra/stream.m3u8"
#EXT-X-MEDIA:TYPE=AUDIO,GROUP-ID="audio_aac",NAME="English",LANGUAGE="eng",AUTOSELECT=YES,URI="audio/aac/eng/stream.m3u8"

# Media Playlists
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=2198120,BANDWIDTH=2416640,CODECS="avc1.4D401F,mp4a.40.2",RESOLUTION=1280x720,AUDIO="audio_aac",SUBTITLES="subtitles"
media-1/stream.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=1001663,BANDWIDTH=1102896,CODECS="avc1.42C01E,mp4a.40.2",RESOLUTION=640x360,AUDIO="audio_aac",SUBTITLES="subtitles"
media-2/stream.m3u8
#EXT-X-STREAM-INF:AVERAGE-BANDWIDTH=4007581,BANDWIDTH=4391894,CODECS="avc1.4D4029,mp4a.40.2",RESOLUTION=1920x1080,AUDIO="audio_aac",SUBTITLES="subtitles"
media-3/stream.m3u8


  


  I thought it was easy : I added a -map 0:s:0 to get the first subtitles, but ffmpeg told me that there's no stream named like that.

  


  Then I ran ffprobe, which tells me there are no subtitles streams for him :

  


  ffprobe "blahblah.m3u8" -show_streams -select_streams s


  


  You can find here all the streams which the ffprobe command shows. There are lots of video and audio streams, but there are no subtitles streams.

  


  Why don't ffmpeg and ffprobe find the subtitles streams ? Is it because they are split in a different m3u8 playlist file ?

  


• ffmpeg : Set the language of an audio stream without touching other metadata

  7 octobre 2020, par amirvf

  I have a MP4 file with an audio stream set to English. I want to change the language of audio stream to French.
I use the following command :

  


  ffmpeg -i input.mp4 -map 0 -c: copy -metadata:s:v language=und -metadata:s:a:0 language=fre output.mp4


  


  The language of audio stream changes to French without any issues, however, the "Title" of language is lost.

  


  Initially the audio stream was like this :
  
Language : English
  
Title : AC3 5.1 Channels

  


  After changing the language to French it is like this :
  
Language : French
  
Title : empty

  


  How should I modify the command so it does not touch the other attributes such as "Title" ?

  


  Thanks

  


• FFmpeg make : *** [libavdevice/avfoundation.o] Error 1

  29 décembre 2014, par Althen Lim Zi Xuan

  I’m very new (1 weeks ago) to Mac OS environment and I have to create a iPhone apps using FFmpeg (I’m new to this, too !). This is what I’ve done to import FFmpeg library.

  First, here’s the environment :

  OS: Mac OS X 10.7.5
  
  Xcode: 4.5
  
  FFmpeg: 2.5 (Latest update of 04/12/2014)

  So I download from FFmpeg.org using command :

  git clone git://source.ffmpeg.org/ffmpeg.git ~/ffmpeg

  and create the folder in it :

  cd ffmpeg
  
  mkdir i386
  
  mkdir armv7
  
  mkdir armv7s
  
  mkdir -p universal/lib

  I download the gas-preprocessor.pl from yuvi and copied into /usr/bin and /usr/local/bin with READ/WRITE access for all.

  However, I do encounter the error as title mentions during the making process of armv7 and armv7s which appear like this :

  make: *** [libavdevice/avfoundation.o] Error 1

  Can anyone teach me how to deal with it ? Here’s my configuration.

  For i386 : (Compilation success and I saw files and folder in i386 folder)

  ./configure --cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/gcc" --as="/usr/local/bin/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2" --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk" --target-os=darwin --arch=i386 --cpu=i386 --extra-cflags="-arch i386" --extra-ldflags="-arch i386 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator6.0.sdk"--prefix=compiled/i386 --enable-cross-compile --enable-nonfree --enable-gpl --disable-armv5te --disable-swscale-alpha --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-debug

  For armv7 :

  ./configure --cc=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc --as="/usr/local/bin/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2" --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk --target-os=darwin --arch=arm --cpu=cortex-a8 --extra-cflags="-arch armv7" --extra-ldflags="-arch armv7 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk" --prefix=compiled/armv7 --enable-cross-compile --enable-nonfree --enable-gpl --disable-armv5te --disable-swscale-alpha --disable-doc --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --disable-asm --disable-debug

  and for armv7s :

  ./configure --prefix=armv7s --as="/usr/local/bin/gas-preprocessor.pl /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/llvm-gcc-4.2/bin/arm-apple-darwin10-llvm-gcc-4.2" --disable-ffmpeg --disable-ffplay --disable-ffprobe --disable-ffserver --enable-avresample --enable-cross-compile --sysroot="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk" --target-os=darwin --cc="/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/gcc" --extra-cflags="-arch armv7s -mfpu=neon -miphoneos-version-min=6.0" --extra-ldflags="-arch armv7s -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk -miphoneos-version-min=6.0" --arch=arm --cpu=cortex-a9 --enable-pic

  If any necessary information needed please do inform me and I will upload it A.S.A.P. Any help, comment, guideline are highly appreciated. Thanks !

  Updated :
  This is the error I received during the making process. I have no idea but hope that it helps in configuring out problem :

  CC  libavdevice/alldevices.o
  
  CC  libavdevice/avdevice.o
  
  CC  libavdevice/avfoundation.o
  
  libavdevice/avfoundation.m:44: error: initializer element is not constant
  
  libavdevice/avfoundation.m:44: error: (near initialization for ‘avf_time_base_q.den’)
  
  libavdevice/avfoundation.m:74:5: warning: "__MAC_OS_X_VERSION_MIN_REQUIRED" is not defined
  
  libavdevice/avfoundation.m: In function ‘add_video_device’:
  
  libavdevice/avfoundation.m:300: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:355: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:364: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m: In function ‘add_audio_device’:
  
  libavdevice/avfoundation.m:407: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m: In function ‘get_video_config’:
  
  libavdevice/avfoundation.m:432: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:442: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m: In function ‘get_audio_config’:
  
  libavdevice/avfoundation.m:470: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:480: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m: In function ‘avf_read_header’:
  
  libavdevice/avfoundation.m:534: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:539:5: warning: "__MAC_OS_X_VERSION_MIN_REQUIRED" is not defined
  
  libavdevice/avfoundation.m:546: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:554:5: warning: "__MAC_OS_X_VERSION_MIN_REQUIRED" is not defined
  
  libavdevice/avfoundation.m:575: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:596:5: warning: "__MAC_OS_X_VERSION_MIN_REQUIRED" is not defined
  
  libavdevice/avfoundation.m:619:5: warning: "__MAC_OS_X_VERSION_MIN_REQUIRED" is not defined
  
  libavdevice/avfoundation.m: In function ‘avf_read_packet’:
  
  libavdevice/avfoundation.m:724: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:739: warning: ISO C90 forbids mixed declarations and code
  
  libavdevice/avfoundation.m:776: warning: ISO C90 forbids mixed declarations and code
  
  make: *** [libavdevice/avfoundation.o] Error 1