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  • ffmpeg does not compress video (produces empty file)

    1er septembre 2019, par kalmanIsAGameChanger

    I am trying to compress a video with ffmpeg.

    My operating system : Ubuntu 16.04

    My ffmpeg version (retrieved through ffmpeg -version) :

    ffmpeg version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609

    FYI, The information about the video can be retrieved with :

    ffprobe -show_streams -i "video.mp4"

    and I get :

    ffprobe version 2.8.15-0ubuntu0.16.04.1 Copyright (c) 2007-2018 the FFmpeg developers
    
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.10) 20160609
    
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
    
  libavutil      54. 31.100 / 54. 31.100
    
  libavcodec     56. 60.100 / 56. 60.100
    
  libavformat    56. 40.101 / 56. 40.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 40.101 /  5. 40.101
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  2.101 /  1.  2.101
    
  libpostproc    53.  3.100 / 53.  3.100
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'a2019a_video_2.mp4':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 1
    
    compatible_brands: mp41mp42isom
    
    creation_time   : 2019-08-28 15:28:45
    
  Duration: 00:03:12.49, start: 0.000000, bitrate: 10884 kb/s
    
    Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 12 kb/s (default)
    
    Metadata:
    
      creation_time   : 2019-08-28 15:28:45
    
      handler_name    : Core Media Audio
    
    Stream #0:1(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p(tv, bt709), 1280x720 [SAR 1:1 DAR 16:9], 10862 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 120k tbc (default)
    
    Metadata:
    
      creation_time   : 2019-08-28 15:28:45
    
      handler_name    : Core Media Video
    
[STREAM]
    
index=0
    
codec_name=aac
    
codec_long_name=AAC (Advanced Audio Coding)
    
profile=LC
    
codec_type=audio
    
codec_time_base=1/48000
    
codec_tag_string=mp4a
    
codec_tag=0x6134706d
    
sample_fmt=fltp
    
sample_rate=48000
    
channels=2
    
channel_layout=stereo
    
bits_per_sample=0
    
id=N/A
    
r_frame_rate=0/0
    
avg_frame_rate=0/0
    
time_base=1/48000
    
start_pts=0
    
start_time=0.000000
    
duration_ts=9242624
    
duration=192.554667
    
bit_rate=12469
    
max_bit_rate=128000
    
bits_per_raw_sample=N/A
    
nb_frames=9026
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
TAG:creation_time=2019-08-28 15:28:45
    
TAG:language=eng
    
TAG:handler_name=Core Media Audio
    
[/STREAM]
    
[STREAM]
    
index=1
    
codec_name=h264
    
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    
profile=High
    
codec_type=video
    
codec_time_base=1/120000
    
codec_tag_string=avc1
    
codec_tag=0x31637661
    
width=1280
    
height=720
    
coded_width=1280
    
coded_height=720
    
has_b_frames=0
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=16:9
    
pix_fmt=yuv420p
    
level=32
    
color_range=tv
    
color_space=bt709
    
color_transfer=bt709
    
color_primaries=bt709
    
chroma_location=left
    
timecode=N/A
    
refs=2
    
is_avc=1
    
nal_length_size=4
    
id=N/A
    
r_frame_rate=60000/1001
    
avg_frame_rate=60000/1001
    
time_base=1/60000
    
start_pts=0
    
start_time=0.000000
    
duration_ts=11549538
    
duration=192.492300
    
bit_rate=10862370
    
max_bit_rate=N/A
    
bits_per_raw_sample=8
    
nb_frames=11538
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=1
    
DISPOSITION:dub=0
    
DISPOSITION:original=0
    
DISPOSITION:comment=0
    
DISPOSITION:lyrics=0
    
DISPOSITION:karaoke=0
    
DISPOSITION:forced=0
    
DISPOSITION:hearing_impaired=0
    
DISPOSITION:visual_impaired=0
    
DISPOSITION:clean_effects=0
    
DISPOSITION:attached_pic=0
    
TAG:creation_time=2019-08-28 15:28:45
    
TAG:language=und
    
TAG:handler_name=Core Media Video
    
[/STREAM]

    However, when I try to compress it through the following command :

    ffmpeg -y -i video.mp4 -vcodec h264 -crf 10 output.mp4

    the process just finishes super fast without any error but I get an empty file called output.mp4 (its dimension is 0KB).

    EDIT : Actually there is something which appears in the console (Even if it is not an error). The following :
    The encoder 'aac' is experimental but experimental codecs are not enabled, add '-strict -2' if you want to use it.

    I also tried with the following commands (changing codec etc.)

    ffmpeg -i video.mp4 output.mp4

    ffmpeg -y -i video.mp4 -vcodec copy -crf 10 output.mp4

    ffmpeg -i video.mp4 -vcodec libx264 -crf 10 output.mp4

    ffmpeg -i video.mp4 -vcodec libx265 -crf 10 output.mp4

    But I have always the same problem.

  • Error using PyDub : pcm_s8 codec not supported in WAVE format

    29 mai 2020, par thf9527

    Tried to read in a WAVE file.

    



    Pydub has been working perfectly for the past few months, until I have encountered a specific WAVE file format where I could not import into Python (but it has no issue while playing on windows media player and other players).

    



    from pydub import AudioSegment

file = r"NICE_Dev.wav"
print(utils.mediainfo(file))
try:
    data = AudioSegment.from_file(file)

except Exception as e:
    print(e)


    



    The error message is :

    



    ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
  built with gcc 8.3.1 (GCC) 20190414
  configuration: --disable-static --enable-shared --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx --enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth
  libavutil      56. 22.100 / 56. 22.100
  libavcodec     58. 35.100 / 58. 35.100
  libavformat    58. 20.100 / 58. 20.100
  libavdevice    58.  5.100 / 58.  5.100
  libavfilter     7. 40.101 /  7. 40.101
  libswscale      5.  3.100 /  5.  3.100
  libswresample   3.  3.100 /  3.  3.100
  libpostproc    55.  3.100 / 55.  3.100
Guessed Channel Layout for Input Stream #0.0 : mono
Input #0, wav, from 'NICE_Dev.wav':
  Duration: 00:25:55.39, bitrate: 64 kb/s
    Stream #0:0: Audio: pcm_mulaw ([7][0][0][0] / 0x0007), 8000 Hz, mono, s16, 64 kb/s
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_mulaw (native) -> pcm_s8 (native))
Press [q] to stop, [?] for help
[wav @ 00000265db3c1bc0] pcm_s8 codec not supported in WAVE format
Could not write header for output file #0 (incorrect codec parameters ?): Function not implemented
Error initializing output stream 0:0 -- 
Conversion failed!


    



    I believe it is due to the encoding pcm_s8, but I could not figure out how to solve this issue, the details of the audio file using "utils.mediainfo" is :

    



    {'index': '0', 'codec_name': 'pcm_mulaw', 'codec_long_name': 'PCM mu-law / 
G.711 mu-law', 'profile': 'unknown', 'codec_type': 'audio', 'codec_time_base': 
'1/8000', 'codec_tag_string': '[7][0][0][0]', 'codec_tag': '0x0007', 
'sample_fmt': 's16', 'sample_rate': '8000', 'channels': '1', 'channel_layout': 
'unknown', 'bits_per_sample': '8', 'id': 'N/A', 'r_frame_rate': '0/0', 
'avg_frame_rate': '0/0', 'time_base': '1/8000', 'start_pts': 'N/A', 
'start_time': 'N/A', 'duration_ts': '12443128', 'duration': '1555.391000', 
'bit_rate': '64000', 'max_bit_rate': 'N/A', 'bits_per_raw_sample': 'N/A', 
'nb_frames': 'N/A', 'nb_read_frames': 'N/A', 'nb_read_packets': 'N/A', 
'DISPOSITION': {'default': '0', 'dub': '0', 'original': '0', 'comment': '0', 
'lyrics': '0', 'karaoke': '0', 'forced': '0', 'hearing_impaired': '0', 
'visual_impaired': '0', 'clean_effects': '0', 'attached_pic': '0', 
'timed_thumbnails': '0'}, 'filename': 'NICE_Dev.wav', 'nb_streams': '1', 
'nb_programs': '0', 'format_name': 'wav', 'format_long_name': 'WAV / WAVE 
(Waveform Audio)', 'size': '12443174', 'probe_score': '99'}


    


  • Output file #0 does not contain any stream , Webm VP9 live streaming

    30 août 2019, par Salem

    The source video I use is H264 m3u8 live stream and this is the command I tried

    ffmpeg -re -i "http://sorce.com/live.m3u8" -c:v libvpx-vp9 -s 480x360 -keyint_min 60\
    
-g 60 -speed 5 -tile-columns 4 -frame-parallel 1 -threads 8 -static-thresh 0 \
    
-max-intra-rate 300 -deadline realtime -lag-in-frames 0 -error-resilient 1 \
    
-b:v 300k -c:a libvorbis  -b:a 64k -ar 44100 -f webm_chunk -audio_chunk_duration 2000 \
    
-header "/var/www/example.com/live/glass_360.hdr" -chunk_start_index 1  \
    
/var/www/example.com/live/glass_360_%d.chk  

    I pickup this code from wkiki.webmproject.org
    this is command full log

    ffmpeg version N-94564-gaac382e Copyright (c) 2000-2019 the FFmpeg developers
    
  built with gcc 7 (Ubuntu 7.4.0-1ubuntu1~18.04.1)
    
  configuration: --prefix=/root/ffmpeg_build --pkg-config-flags=--static --extra-cflags=-I/root/ffmpeg_build/include --extra-ldflags=-L/root/ffmpeg_build/lib --extra-libs='-lpthread -lm' --bindir=/root/bin --enable-gpl --enable-libaom --enable-libass --enable-libfdk-aac --enable-libfreetype --enable-libopus --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libfribidi --enable-nonfree
    
  libavutil      56. 33.100 / 56. 33.100
    
  libavcodec     58. 55.100 / 58. 55.100
    
  libavformat    58. 30.100 / 58. 30.100
    
  libavdevice    58.  9.100 / 58.  9.100
    
  libavfilter     7. 58.100 /  7. 58.100
    
  libswscale      5.  6.100 /  5.  6.100
    
  libswresample   3.  6.100 /  3.  6.100
    
  libpostproc    55.  6.100 / 55.  6.100
    
Input #0, mpegts, from 'http://sorce.com/live.m3u8':
    
  Duration: N/A, start: 3860.014278, bitrate: N/A
    
  Program 1 
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0[0x100]: Video: h264 (High) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1600x900 [SAR 1:1 DAR 16:9], 50 fps, 50 tbr, 90k tbn, 100 tbc
    
    Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 48000 Hz, stereo, fltp, 121 kb/s
    
Output #0, webm_chunk, to '/var/www/example.com/live/glass_360_%d.chk':
    
Output file #0 does not contain any stream

    most of the time I got this error message

    [libvorbis @ 0x5617bae0c240] encoder setup failed Error initializing
    
 output stream 0:1 -- Error while opening encoder for output stream
    
 #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

    Here is FFMPEG command output

    Input #0, mpegts, from 'http://sorce.com/live.m3u8':
    
  Duration: N/A, start: 1369.000978, bitrate: N/A
    
  Program 1 
    
    Metadata:
    
      service_name    : Service01
    
      service_provider: FFmpeg
    
    Stream #0:0[0x100]: Video: h264 (Main) ([27][0][0][0] / 0x001B), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], 25 fps, 25 tbr, 90k tbn, 50 tbc
    
    Stream #0:1[0x101]: Audio: aac (LC) ([15][0][0][0] / 0x000F), 44100 Hz, mono, fltp, 127 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (h264 (native) -> vp9 (libvpx-vp9))
    
  Stream #0:1 -> #0:1 (aac (native) -> vorbis (libvorbis))

    I already add video map before video and audio coding argue but I got same error

     -map  0:v:0 -c:v libvpx-vp9 and -map 0:a:0 -c:a libvorbis

    I tried new broadcast command it works first after I disable the audio

    VP9_DASH_PARAMS="-tile-columns 4 -frame-parallel 1 -speed 6" && \
    
ffmpeg -y -re -i http://sorce.com/live.m3u8 -c:v libvpx-vp9 -s 480x360 -b:v 150k \
    
-keyint_min 150 -g 150 ${VP9_DASH_PARAMS} -an -f webm -dash 1 \
    
video_1280x720_500k.webm && sleep 1 && ffmpeg  -f webm_dash_manifest \ 
    
-i video_1280x720_500k.webm -c copy -f webm_dash_manifest - \ adaptation_sets "id=0"  manifest.mpd

    Source
    this command didn’t create manifest.mpd it created only video_1280x720_500k.webm

    ==Edit==

    I write new command (exactly as web wiki said )and everything works perfectly now

    VP9_LIVE_PARAMS=" -tile-columns 4 -frame-parallel 1 -threads 4 -static-thresh 0 -max-intra-rate 300 -deadline good -speed 5 -slices 0 -row-mt 1 -lag-in-frames 0 -error-resilient 1" ; \
    
ffmpeg  -loglevel  0  -re -i http://sorce.com/live.m3u8 \
    
-map 0:v   -pix_fmt yuv420p -c:v libvpx-vp9 -s 480x360  -r 23.976 -keyint_min 60 -g 60 ${VP9_LIVE_PARAMS} -b:v 300k \
    
 -f webm_chunk  -header "/var/www/example.com/live/glass_360.hdr"  -chunk_start_index 1 \
    
  /var/www/example.com/live/glass_360_%d.chk \
    
  -map 0:a  -c:a libvorbis -b:a 64k  \
    
  -f webm_chunk -audio_chunk_duration 2000 -header /var/www/example.com/live/glass_171.hdr \
    
    -chunk_start_index 1 /var/www/example.com/live/glass_171_%d.chk

    this is command to generate .mpd file

     ffmpeg -y -f webm_dash_manifest -live 1 \
    
  -i /var/www/example.com/live/glass_360.hdr \
    
  -f webm_dash_manifest -live 1 \
    
  -i /var/www/example.com/live/glass_171.hdr \
    
  -c copy  -map 0 -map 1 \
    
  -f webm_dash_manifest -live 1 \
    
    -adaptation_sets "id=0,streams=0 id=1,streams=1" \
    
    -chunk_start_index 1  -chunk_duration_ms 2000 \
    
    -time_shift_buffer_depth 7200  -minimum_update_period 7200 \
    
  /var/www/example.com/live/glass_live_manifest.mpd

    and this is webtest.html file

      <code class="echappe-js">&lt;script src='http://stackoverflow.com/feeds/tag/dash.all.min.js'&gt;&lt;/script&gt;

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