Recherche avancée

Médias (1)

Mot : - Tags -/copyleft

Autres articles (68)

  • MediaSPIP 0.1 Beta version

    25 avril 2011, par

    MediaSPIP 0.1 beta is the first version of MediaSPIP proclaimed as "usable".
    The zip file provided here only contains the sources of MediaSPIP in its standalone version.
    To get a working installation, you must manually install all-software dependencies on the server.
    If you want to use this archive for an installation in "farm mode", you will also need to proceed to other manual (...)

  • MediaSPIP version 0.1 Beta

    16 avril 2011, par

    MediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
    Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
    Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
    Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)

  • Amélioration de la version de base

    13 septembre 2013

    Jolie sélection multiple
    Le plugin Chosen permet d’améliorer l’ergonomie des champs de sélection multiple. Voir les deux images suivantes pour comparer.
    Il suffit pour cela d’activer le plugin Chosen (Configuration générale du site > Gestion des plugins), puis de configurer le plugin (Les squelettes > Chosen) en activant l’utilisation de Chosen dans le site public et en spécifiant les éléments de formulaires à améliorer, par exemple select[multiple] pour les listes à sélection multiple (...)

Sur d’autres sites (11885)

  • Use ffmpeg to extract picture from m4v file

    31 octobre 2017, par Brian

    I used a program called MetaZ on my mac to tag all my video files (m4v). I am now trying to use these m4v files in Kodi which requires .nfo files and separate picture files for movie posters, etc. I want to extract the picture that is already in the m4v file.

    When I use ffprobe -show_streams, I can see that index4 is a png file (codec_name=png). How do I extract it ? I believe ffmpeg can do it, but can’t figure out how.

    Here is the output from ffprobe :

    Brians-Mac-mini:PythonScript brianjhille$ ffprobe -show_streams badwords.m4v
    
ffprobe version N-88046-g0cb8369-tessus Copyright (c) 2007-2017 the FFmpeg developers
    
  built with Apple LLVM version 8.0.0 (clang-800.0.42.1)
    
  configuration: --cc=/usr/bin/clang --prefix=/opt/ffmpeg --extra-version=tessus --enable-avisynth --enable-fontconfig --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-libzmq --enable-libzvbi --enable-version3 --pkg-config-flags=--static --disable-ffplay
    
  libavutil      56.  0.100 / 56.  0.100
    
  libavcodec     58.  0.100 / 58.  0.100
    
  libavformat    58.  0.100 / 58.  0.100
    
  libavdevice    58.  0.100 / 58.  0.100
    
  libavfilter     7.  0.100 /  7.  0.100
    
  libswscale      5.  0.100 /  5.  0.100
    
  libswresample   3.  0.100 /  3.  0.100
    
  libpostproc    55.  0.100 / 55.  0.100
    
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x7fd67b002a00] stream 0, timescale not set
    
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'badwords.m4v':
    
  Metadata:
    
    major_brand     : mp42
    
    minor_version   : 0
    
    compatible_brands: mp42isomavc1
    
    creation_time   : 2014-10-20T13:01:06.000000Z
    
    iTunEXTC        : mpaa|R|400|
    
    title           : Bad Words
    
    artist          : Jason Bateman, Kathryn Hahn, Allison Janney, Philip Baker Hall, Rohan Chand, Ben Falcone, Patricia Belcher, Beth Grant, Rachel Harris, Steve Witting, Greg Cromer
    
    date            : 2013-09-06T11:00:00Z
    
    track           : 0
    
    disc            : 0
    
    season_number   : 0
    
    episode_sort    : 0
    
    description     : A spelling bee loser sets out to exact revenge by finding a loophole and attempting to win as an adult.
    
    synopsis        : A spelling bee loser sets out to exact revenge by finding a loophole and attempting to win as an adult.
    
    encoder         : HandBrake 0.9.9 2013052900
    
    hd_video        : 0
    
    media_type      : 9
    
    genre           : Comedy
    
    iTunMOVI        : <?xml version="1.0" encoding="UTF-8"?>
    
                    : 
    
                    : <plist version="1.0">
    
                    : <dict>
    
                    :   <key>cast</key>
    
                    :   <array>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Jason Bateman</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Kathryn Hahn</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Allison Janney</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Philip Baker Hall</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Rohan Chand</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Ben Falcone</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Patricia Belcher</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Beth Grant</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Rachel Harris</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Steve Witting</string>
    
                    :       </dict>
    
                    :       <dict>
    
                    :           <key>name</key>
    
                    :           <string>Greg Cromer</string>
    
                    :       </dict>
    
                    :   </array>
    
                    : </dict>
    
                    : </plist>
    
                    : 
    
  Duration: 01:29:02.84, start: 0.000000, bitrate: 1339 kb/s
    
    Chapter #0:0: start 0.000000, end 348.214000
    
    Metadata:
    
      title           : Chapter 1
    
    Chapter #0:1: start 348.214000, end 676.542000
    
    Metadata:
    
      title           : Chapter 2
    
    Chapter #0:2: start 676.542000, end 860.058000
    
    Metadata:
    
      title           : Chapter 3
    
    Chapter #0:3: start 860.058000, end 1171.836000
    
    Metadata:
    
      title           : Chapter 4
    
    Chapter #0:4: start 1171.836000, end 1441.839000
    
    Metadata:
    
      title           : Chapter 5
    
    Chapter #0:5: start 1441.839000, end 1632.129000
    
    Metadata:
    
      title           : Chapter 6
    
    Chapter #0:6: start 1632.129000, end 1925.422000
    
    Metadata:
    
      title           : Chapter 7
    
    Chapter #0:7: start 1925.422000, end 2167.030000
    
    Metadata:
    
      title           : Chapter 8
    
    Chapter #0:8: start 2167.030000, end 2409.605000
    
    Metadata:
    
      title           : Chapter 9
    
    Chapter #0:9: start 2409.605000, end 2748.276000
    
    Metadata:
    
      title           : Chapter 10
    
    Chapter #0:10: start 2748.276000, end 2917.945000
    
    Metadata:
    
      title           : Chapter 11
    
    Chapter #0:11: start 2917.945000, end 3309.502000
    
    Metadata:
    
      title           : Chapter 12
    
    Chapter #0:12: start 3309.502000, end 3634.660000
    
    Metadata:
    
      title           : Chapter 13
    
    Chapter #0:13: start 3634.660000, end 3942.434000
    
    Metadata:
    
      title           : Chapter 14
    
    Chapter #0:14: start 3942.434000, end 4101.626000
    
    Metadata:
    
      title           : Chapter 15
    
    Chapter #0:15: start 4101.626000, end 4336.193000
    
    Metadata:
    
      title           : Chapter 16
    
    Chapter #0:16: start 4336.193000, end 4620.643000
    
    Metadata:
    
      title           : Chapter 17
    
    Chapter #0:17: start 4620.643000, end 4873.729000
    
    Metadata:
    
      title           : Chapter 18
    
    Chapter #0:18: start 4873.729000, end 5153.341000
    
    Metadata:
    
      title           : Chapter 19
    
    Chapter #0:19: start 5153.341000, end 5342.796000
    
    Metadata:
    
      title           : Chapter 20
    
    Stream #0:0(und): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p(tv, smpte170m/smpte170m/bt709), 720x356 [SAR 32:27 DAR 640:267], 716 kb/s, 23.98 fps, 59.94 tbr, 90k tbn, 180k tbc (default)
    
    Metadata:
    
      creation_time   : 2014-10-20T13:01:06.000000Z
    
      encoder         : JVT/AVC Coding
    
    Stream #0:1(eng): Audio: aac (LC) (mp4a / 0x6134706D), 48000 Hz, stereo, fltp, 159 kb/s (default)
    
    Metadata:
    
      creation_time   : 2014-10-20T13:01:06.000000Z
    
    Stream #0:2(eng): Audio: ac3 (ac-3 / 0x332D6361), 48000 Hz, 5.1(side), fltp, 448 kb/s
    
    Metadata:
    
      creation_time   : 2014-10-20T13:01:06.000000Z
    
    Side data:
    
      audio service type: main
    
    Stream #0:3(und): Data: bin_data (text / 0x74786574)
    
    Metadata:
    
      creation_time   : 2014-10-21T13:42:00.000000Z
    
    Stream #0:4: Video: png, rgb24(pc), 1400x2100, 90k tbr, 90k tbn, 90k tbc
    
Unsupported codec with id 100359 for input stream 3
    
[STREAM]
    
index=0
    
codec_name=h264
    
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    
profile=Constrained Baseline
    
codec_type=video
    
codec_time_base=40071281/1921695000
    
codec_tag_string=avc1
    
codec_tag=0x31637661
    
width=720
    
height=356
    
coded_width=720
    
coded_height=356
    
has_b_frames=0
    
sample_aspect_ratio=32:27
    
display_aspect_ratio=640:267
    
pix_fmt=yuv420p
    
level=30
    
color_range=tv
    
color_space=smpte170m
    
color_transfer=bt709
    
color_primaries=smpte170m
    
chroma_location=left
    
field_order=unknown
    
timecode=N/A
    
refs=1
    
is_avc=true
    
nal_length_size=4
    
id=N/A
    
r_frame_rate=60000/1001
    
avg_frame_rate=960847500/40071281
    
time_base=1/90000
    
start_pts=0
    
start_time=0.000000
    
duration_ts=480855372
    
duration=5342.837467
    
bit_rate=716167
    
max_bit_rate=N/A
    
bits_per_raw_sample=8
    
nb_frames=128113
    
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
    
DISPOSITION:timed_thumbnails=0
    
TAG:creation_time=2014-10-20T13:01:06.000000Z
    
TAG:language=und
    
TAG:encoder=JVT/AVC Coding
    
[/STREAM]
    
[STREAM]
    
index=1
    
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=256454656
    
duration=5342.805333
    
bit_rate=159788
    
max_bit_rate=321176
    
bits_per_raw_sample=N/A
    
nb_frames=250444
    
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
    
DISPOSITION:timed_thumbnails=0
    
TAG:creation_time=2014-10-20T13:01:06.000000Z
    
TAG:language=eng
    
[/STREAM]
    
[STREAM]
    
index=2
    
codec_name=ac3
    
codec_long_name=ATSC A/52A (AC-3)
    
profile=unknown
    
codec_type=audio
    
codec_time_base=1/48000
    
codec_tag_string=ac-3
    
codec_tag=0x332d6361
    
sample_fmt=fltp
    
sample_rate=48000
    
channels=6
    
channel_layout=5.1(side)
    
bits_per_sample=0
    
dmix_mode=-1
    
ltrt_cmixlev=-1.000000
    
ltrt_surmixlev=-1.000000
    
loro_cmixlev=-1.000000
    
loro_surmixlev=-1.000000
    
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=256453632
    
duration=5342.784000
    
bit_rate=448000
    
max_bit_rate=N/A
    
bits_per_raw_sample=N/A
    
nb_frames=166962
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=0
    
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
    
DISPOSITION:timed_thumbnails=0
    
TAG:creation_time=2014-10-20T13:01:06.000000Z
    
TAG:language=eng
    
[SIDE_DATA]
    
side_data_type=Audio Service Type
    
[/SIDE_DATA]
    
[/STREAM]
    
[STREAM]
    
index=3
    
codec_name=bin_data
    
codec_long_name=binary data
    
profile=unknown
    
codec_type=data
    
codec_tag_string=text
    
codec_tag=0x74786574
    
id=N/A
    
r_frame_rate=0/0
    
avg_frame_rate=0/0
    
time_base=1/1000
    
start_pts=0
    
start_time=0.000000
    
duration_ts=5342837
    
duration=5342.837000
    
bit_rate=N/A
    
max_bit_rate=N/A
    
bits_per_raw_sample=N/A
    
nb_frames=20
    
nb_read_frames=N/A
    
nb_read_packets=N/A
    
DISPOSITION:default=0
    
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
    
DISPOSITION:timed_thumbnails=0
    
TAG:creation_time=2014-10-21T13:42:00.000000Z
    
TAG:language=und
    
[/STREAM]
    
[STREAM]
    
index=4
    
codec_name=png
    
codec_long_name=PNG (Portable Network Graphics) image
    
profile=unknown
    
codec_type=video
    
codec_time_base=0/1
    
codec_tag_string=[0][0][0][0]
    
codec_tag=0x0000
    
width=1400
    
height=2100
    
coded_width=1400
    
coded_height=2100
    
has_b_frames=0
    
sample_aspect_ratio=0:1
    
display_aspect_ratio=0:1
    
pix_fmt=rgb24
    
level=-99
    
color_range=pc
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=unspecified
    
field_order=unknown
    
timecode=N/A
    
refs=1
    
id=N/A
    
r_frame_rate=90000/1
    
avg_frame_rate=0/0
    
time_base=1/90000
    
start_pts=0
    
start_time=0.000000
    
duration_ts=480855372
    
duration=5342.837467
    
bit_rate=N/A
    
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
    
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=1
    
DISPOSITION:timed_thumbnails=0
    
[/STREAM]

    Thanks. Brian

  • Playing Video on a Sega Dreamcast

    9 mars 2011, par Multimedia Mike — Sega Dreamcast

    Here’s an honest engineering question : If you were tasked to make compressed video play back on a Sega Dreamcast video game console, what video format would you choose ? Personally, I would choose RoQ, the format invented for The 11th Hour computer game and later used in Quake III and other games derived from the same engine. This post explains my reasoning.

    Video Background
    One of the things I wanted to do when I procured a used Sega Dreamcast back in 2001 was turn it into a set-top video playback unit. This is something that a lot of people tried to do, apparently, to varying degrees of success. Interest would wane in a few years as it became easier and easier to crack an Xbox and install XBMC. The Xbox was much better suited to playing codecs that were getting big at the time, most notably MPEG-4 part 2 video (DivX/XviD).

    The Dreamcast, while quite capable when it was released in 1999, was not very well-equipped to deal with an MPEG-type codec. I have recently learned that there are other hackers out there on the internet who are still trying to get the most out of this system. I was contacted for advice about how to make Theora perform better on the Dreamcast.

    Interesting thing about consoles and codecs : Since you are necessarily distributing code along with your data, you have far more freedom to use whatever codecs you want for your audio and video data. This is why Vorbis and even Theora have seen quite a bit of use in video games, "internet standards" be darned. Thus, when I realized this application had no hard and fast requirement to use Theora, and that it could use any codec that fit the platform, my mind started churning. When I was programming the DC 10 years ago, I didn’t have access to the same wealth of multimedia knowledge that is currently available.

    Requirements Gathering
    What do we need here ?

    • Codec needs to run on the Sega Dreamcast ; this eliminates codecs for which only binary decoder implementations are available
    • Must decode 320x240 video at 30 fps ; higher resolutions up to 640x480 would be desirable
    • Must deliver decent quality at 12X optical read speeds (DC drive speed)
    • There must be some decent, preferably free, encoder readily available ; speed of encoding, however, is not important ; i.e., "take as long as you need, encoder"

    Theora was the go-to codec because it’s just commonly known as "the free, open source video codec". But clearly it’s not suitable for, well... any purpose, really (sorry, easy target ; OW ! stop throwing things !). VP8/WebM — Theora’s heir apparent — would not qualify either, as my prior experiments have already demonstrated.

    Candidates
    What did the big boys use for video on the Dreamcast ? A lot of games relied on CRI’s Sofdec middleware which was MPEG-1 video and a custom ADPCM format. I don’t know if I have ever seen DC games that used MPEG-1 video at a higher resolution than 320x240 (though I have not searched exhaustively). The fact that CRI used a custom ADPCM format for this application may indicate that there wasn’t enough CPU power left over to decode a perceptual, transform-based audio codec alongside the 320x240 video.

    A few other DC games used 4X Technologies’ 4XM format. The most notable licensee was Alone in the Dark : The New Nightmare (DC version only ; PC version used Bink). This codec was DCT-based but incorporated 16-bit RGB colorspace into its design, presumably to optimize for applications like game consoles that couldn’t directly handle planar YUV. AITD:TNN’s videos were 640x360, a marked improvement over the typical Sofdec fare. I was about to write off 4XM as a contender due to lack of encoder, but the encoding tools are preserved on our samples site. A few other issues, though : The FFmpeg decoder doesn’t seem to work correctly as of this writing (and nobody has noticed yet, even though it’s tested via FATE).

    What ideas do I have ? Right off the bat, I’m thinking vector quantizer (VQ). Vector quantizers are notoriously slow to compress but are blazingly fast to decompress which is why they were popular in the early days of video compression. First, there’s Cinepak. I fear that might be too simple for this application. Plus, I don’t know if existing (binary-only) compressors are very decent. It seems that they only ever had to handle small videos and I’ve heard that they can really fall over if anything more is demanded of them.

    Sorenson Video 1 is another contender. FFmpeg has an encoder (which some allege is better than Sorenson’s original compressor). However, I fear that the wonky algorithm and colorspace might not mesh well with the Dreamcast.

    My thinking quickly converged on RoQ. This was designed to run fullscreen (640x480) video on i486-class hardware. While RoQ fundamentally operates in a YUV colorspace, it’s trivial to convert it to any other colorspace during decoding and the image will be rendered in that colorspace. Plus, there are open source encoders available for the format (namely, several versions of Eric Lasota’s Switchblade encoder, one of which lives natively in FFmpeg), as well as the original proprietary encoder.

    Which Library ?
    There are several code choices here : FFmpeg (LGPL), Switchblade (GPL), and the original Quake 3 source code (GPL). There is one more option that I think might be easiest, which is the decoder Dr. Tim created when he reverse engineered the format in the first place. That has a very liberal "do whatever you like, but be nice and give me credit" license (probably qualifies as BSD).

    This code is no longer at its original home but the Wayback Machine still had a copy, which I have now mirrored (idroq.tar.gz).

    Adaptation
    Dr. Tim’s code still compiles and runs great on Linux (64-bit !) with SDL output. I would like to get it ported to the Dreamcast using the same SDL output, which KallistiOS supports. Then, there is the matter of fixing the longstanding chroma bug in the original sample decoder (described here). The decoder also needs to be modified to natively render RGB565 data, as that will work best with the DC’s graphics hardware.

    After making the code work, I want to profile it and test whether it can handle full-frame 640x480 playback at 30 frames/second. I will need to contrive a sample to achieve this.

    Unfortunately, things went off the rails pretty quickly when I tried to get the RoQ decoder ported to DC/KOS. It looks like there’s a bug in KallistiOS’s minimalistic standard C library, or at least a discrepancy with my desktop Linux system. When you read to the end of a file and then seek backwards to someplace that isn’t the end, is the file still in EOF state ?

    According to my Linux desktop :

    open file ;          feof() = 0
seek to end ;        feof() = 0
read one more byte ; feof() = 1
seek back to start ; feof() = 0

    According to KallistiOS :

    open file ;          feof() = 0
seek to end ;        feof() = 0
read one more byte ; feof() = 1
seek back to start ; feof() = 1

    Here’s the seek-test.c program I used to test this issue :

    PLAIN TEXT
    C :
    1. #include <stdio .h>
    2.  
    3. int main()
    4. {
    5.   FILE *f ;
    6.   unsigned char byte ;
    7.  
    8.   f = fopen("seek_test.c", "r") ;
    9.   printf("open file ;     feof() = %d\n", feof(f)) ;
    10.   fseek(f, 0, SEEK_END) ;
    11.   printf("seek to end ;    feof() = %d\n", feof(f)) ;
    12.   fread(&byte, 1, 1, f) ;
    13.   printf("read one more byte ; feof() = %d\n", feof(f)) ;
    14.   fseek(f, 0, SEEK_SET) ;
    15.   printf("seek back to start ; feof() = %d\n", feof(f)) ;
    16.   fclose(f) ;
    17.  
    18.   return 0 ;
    19. }

    EOF
    Speaking of EOF, I’m about done for this evening.

    What codec would you select for this task, given the requirements involved ?

  • ffmpeg transcoding stop after few seconds

    9 avril 2018, par Salem F

    Hi i’m trying to do this over week now with no success ,
    What’s i’m trying to do is transcoding video from live streaming source and downscale it with FFmpeg , but every time I start transcoding it broadcasting fro 11 Sec and stop . here last command I tried

      ffmpeg  -re  -i 'http://source.com/1034.ts' -preset ultrafast http://localhost:2052/feed1.ffm

    I tried to download the .ts file with IDM and it finish downloading the file on the exact 12 Sec that FFmpeg stop trans coding on it .

    does that means that FFmpeg download that file as one segment and not continued reading the source video As what video players does usually . BTW I tried with source with VLC player and it didn’t stop playing the the same source video .

    Edit :- I decide to pass FFmpeg command via FFserver config file ffserver.conf

    Launch ffmpeg -i 'http://source.com/1.ts' -copyinkf -codec copy  

    The stream works fine for a while but after testing couple sources I notice it’s struggle to trans-coding HD videos .

    I guess the issue with my VPS KVM server being very limited CPU and RAM ( 128MB only ) ! Since I tried using ultrafast preset but din’t solve the issue , another thing , I notice when I enable AVOptionVideo crf setting on ffserver.conf trans-coding runs bit smoothly without frame-rate dropping .
    Las my server uses Xeon L5520 CPU which is outdated CPU specially I gout 1/4 power of V single core (if they count HT it will be 1/8 of the real core ) :(

    Edit 2 :-

    # vlc -I dummy 'https://source.com/1034.ts' --sout '#standard{access=http,mux=flv,dst=localhost:2052}'
    
VLC media player 2.2.8 Weatherwax (revision 2.2.7-14-g3cc1d8cba9)
    
[09d3fdf0] pulse audio output error: PulseAudio server connection failure: Connection refused
    
[09d279c0] core interface error: no suitable interface module
    
[09c9b8f8] core libvlc error: interface "globalhotkeys,none" initialization failed
    
[09d279c0] dbus interface error: Failed to connect to the D-Bus session daemon: Unable to autolaunch a dbus-daemon without a $DISPLAY for X11
    
[09d279c0] core interface error: no suitable interface module
    
[09c9b8f8] core libvlc error: interface "dbus,none" initialization failed
    
[09d279c0] dummy interface: using the dummy interface module...
    
[b5e04ae0] access_output_http access out: Consider passing --http-host=IP on the command line instead.
    
[b5e38ab8] ts demux: MPEG-4 descriptor not found for pid 0x101 type 0xf
    
[b5e90ae0] packetizer_mpeg4audio decoder: AAC channels: 2 samplerate: 48000
    
[flv @ 0xb5e33b40] dimensions not set
    
[b5e06360] avformat mux error: could not write header: Invalid argument
    
[b5e88ef0] core decoder error: cannot continue streaming due to errors
    
[b5e90ae0] core decoder error: cannot continue streaming due to errors

    Here output with -loglevel verbose

    :~# ffmpeg -i http://source.com/1.ts -copyinkf -codec copy  -loglevel verbose  http://127.0.0.1:8090/feed1.ffm
    
ffmpeg version 2.6.9 Copyright (c) 2000-2016 the FFmpeg developers
    
  built with gcc 4.9.2 (Debian 4.9.2-10)
    
  configuration: --prefix=/usr --extra-cflags='-g -O2 -fstack-protector-strong -Wformat -Werror=format-security ' --extra-ldflags='-Wl,-z,relro' --cc='ccache cc' --enable-shared --enable-libmp3lame --enable-gpl --enable-nonfree --enable-libvorbis --enable-pthreads --enable-libfaac --enable-libxvid --enable-postproc --enable-x11grab --enable-libgsm --enable-libtheora --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libx264 --enable-libspeex --enable-nonfree --disable-stripping --enable-libvpx --enable-libschroedinger --disable-encoder=libschroedinger --enable-version3 --enable-libopenjpeg --enable-librtmp --enable-avfilter --enable-libfreetype --enable-libvo-aacenc --disable-decoder=amrnb --enable-libvo-amrwbenc --enable-libaacplus --libdir=/usr/lib/i386-linux-gnu --disable-vda --enable-libbluray --enable-libcdio --enable-gnutls --enable-frei0r --enable-openssl --enable-libass --enable-libopus --enable-fontconfig --enable-libpulse --disable-mips32r2 --disable-mipsdspr1 --disable-mipsdspr2 --enable-libvidstab --enable-libzvbi --enable-avresample --disable-htmlpages --disable-podpages --enable-libutvideo --enable-libfdk-aac --enable-libx265 --enable-libiec61883 --enable-vaapi --enable-libdc1394 --disable-altivec --shlibdir=/usr/lib/i386-linux-gnu
    
  libavutil      54. 20.100 / 54. 20.100
    
  libavcodec     56. 26.100 / 56. 26.100
    
  libavformat    56. 25.101 / 56. 25.101
    
  libavdevice    56.  4.100 / 56.  4.100
    
  libavfilter     5. 11.102 /  5. 11.102
    
  libavresample   2.  1.  0 /  2.  1.  0
    
  libswscale      3.  1.101 /  3.  1.101
    
  libswresample   1.  1.100 /  1.  1.100
    
  libpostproc    53.  3.100 / 53.  3.100
    
Invalid UE golomb code
    
    Last message repeated 2 times
    
Input #0, mpegts, from 'http://source.com/1.ts':
    
  Duration: N/A, start: 30472.768167, 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, 960x540 (960x544) [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, 105 kb/s
    
[graph 0 input from stream 0:1 @ 0x971f2c0] tb:1/48000 samplefmt:fltp samplerate:48000 chlayout:0x3
    
[audio format for output stream 0:0 @ 0x9844de0] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0'
    
[auto-inserted resampler 0 @ 0x97115e0] ch:2 chl:stereo fmt:fltp r:48000Hz -> ch:1 chl:mono fmt:fltp r:22050Hz
    
[graph 1 input from stream 0:0 @ 0x96f5d00] w:960 h:540 pixfmt:yuv420p tb:1/90000 fr:50/1 sar:1/1 sws_param:flags=2
    
[scaler for output stream 0:1 @ 0x96f5e80] w:352 h:240 flags:'0x4' interl:0
    
[scaler for output stream 0:1 @ 0x96f5e80] w:960 h:540 fmt:yuv420p sar:1/1 -> w:352 h:240 fmt:yuv420p sar:40/33 flags:0x4
    
Output #0, ffm, to 'http://127.0.0.1:8090/feed1.ffm':
    
  Metadata:
    
    creation_time   : now
    
    encoder         : Lavf56.25.101
    
    Stream #0:0: Audio: wmav2, 22050 Hz, mono, fltp, 64 kb/s
    
    Metadata:
    
      encoder         : Lavc56.26.100 wmav2
    
    Stream #0:1: Video: msmpeg4v3 (msmpeg4), yuv420p, 352x240 [SAR 40:33 DAR 16:9], q=2-31, 256 kb/s, 50 fps, 1000k tbn, 15 tbc
    
    Metadata:
    
      encoder         : Lavc56.26.100 msmpeg4
    
Stream mapping:
    
  Stream #0:1 -> #0:0 (aac (native) -> wmav2 (native))
    
  Stream #0:0 -> #0:1 (h264 (native) -> msmpeg4v3 (msmpeg4))
    
Press [q] to stop, [?] for help
    
Invalid UE golomb code
    
*** dropping frame 3 from stream 1 at ts 1
    
    Last message repeated 1 times
    
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
    
*** dropping frame 4 from stream 1 at ts 2
    
    Last message repeated 1 times
    
*** dropping frame 5 from stream 1 at ts 3
    
    Last message repeated 1 times
    
*** dropping frame 5 from stream 1 at ts 4
    
*** dropping frame 6 from stream 1 at ts 4
    
    Last message repeated 1 times
    
*** dropping frame 7 from stream 1 at ts 5
    
    Last message repeated 1 times
    
[msmpeg4 @ 0x970f060] warning, clipping 1 dct coefficients to -127..127
    
*** dropping frame 8 from stream 1 at ts 6
    
    Last message repeated 1 times
    
*** dropping frame 8 from stream 1 at ts 7
    
*** dropping frame 9 from stream 1 at ts 7
    
    Last message repeated 1 times
    
*** dropping frame 10 from stream 1 at ts 8
    
    Last message repeated 1 times
    
*** dropping frame 11 from stream 1 at ts 9
    
    Last message repeated 1 times
    
*** dropping frame 11 from stream 1 at ts 10
    
*** dropping frame 12 from stream 1 at ts 10
    
    Last message repeated 1 times
    
*** dropping frame 13 from stream 1 at ts 11
    
    Last message repeated 1 times
    
*** dropping frame 14 from stream 1 at ts 12
    
    Last message repeated 1 times
    
*** dropping frame 14 from stream 1 at ts 13
    
*** dropping frame 15 from stream 1 at ts 13
    
    Last message repeated 1 times
    
*** dropping frame 16 from stream 1 at ts 14
    
    Last message repeated 1 times
    
*** dropping frame 17 from stream 1 at ts 15
    
    Last message repeated 1 times
    
*** dropping frame 17 from stream 1 at ts 16
    
*** dropping frame 18 from stream 1 at ts 16
    
    Last message repeated 1 times
    
*** dropping frame 19 from stream 1 at ts 17
    
    Last message repeated 1 times
    
*** dropping frame 20 from stream 1 at ts 18me=00:00:01.33 bitrate= 270.3kbits/s dup=0 drop=39
    
    Last message repeated 1 times
    
*** dropping frame 20 from stream 1 at ts 19
    
*** dropping frame 21 from stream 1 at ts 19
    
    Last message repeated 1 times
    
*** dropping frame 22 from stream 1 at ts 20
    
    Last message repeated 1 times
    
*** dropping frame 23 from stream 1 at ts 21
    
    Last message repeated 1 times
    
*** dropping frame 23 from stream 1 at ts 22
    
*** dropping frame 24 from stream 1 at ts 22
    
    Last message repeated 1 times
    
*** dropping frame 25 from stream 1 at ts 23
    
    Last message repeated 1 times
    
*** dropping frame 26 from stream 1 at ts 24
    
    Last message repeated 1 times
    
*** dropping frame 26 from stream 1 at ts 25
    
*** dropping frame 27 from stream 1 at ts 25
    
    Last message repeated 1 times
    
*** dropping frame 28 from stream 1 at ts 26
    
    Last message repeated 1 times
    
*** dropping frame 29 from stream 1 at ts 27
    
    Last message repeated 1 times
    
*** dropping frame 29 from stream 1 at ts 28
    
*** dropping frame 30 from stream 1 at ts 28
    
    Last message repeated 1 times
    
*** dropping frame 31 from stream 1 at ts 29
    
    Last message repeated 1 times
    
*** dropping frame 32 from stream 1 at ts 30
    
    Last message repeated 1 times
    
*** dropping frame 32 from stream 1 at ts 31
    
*** dropping frame 33 from stream 1 at ts 31
    
    Last message repeated 1 times
    
*** dropping frame 34 from stream 1 at ts 32
    
    Last message repeated 1 times
    
*** dropping frame 34 from stream 1 at ts 33
    
*** dropping frame 35 from stream 1 at ts 33
    
*** dropping frame 35 from stream 1 at ts 34
    
*** dropping frame 36 from stream 1 at ts 34
    
    Last message repeated 1 times
    
*** dropping frame 37 from stream 1 at ts 35
    
    Last message repeated 1 times
    
Invalid UE golomb code
    
*** dropping frame 38 from stream 1 at ts 36
    
    Last message repeated 1 times
    
*** dropping frame 38 from stream 1 at ts 37
    
*** dropping frame 39 from stream 1 at ts 37
    
    Last message repeated 1 times
    
*** dropping frame 40 from stream 1 at ts 38
    
    Last message repeated 1 times
    
*** dropping frame 41 from stream 1 at ts 39me=00:00:02.73 bitrate= 311.7kbits/s dup=0 drop=88
    
    Last message repeated 1 times
    
*** dropping frame 41 from stream 1 at ts 40
    
*** dropping frame 42 from stream 1 at ts 40
    
    Last message repeated 1 times
    
*** dropping frame 43 from stream 1 at ts 41
    
    Last message repeated 1 times
    
*** dropping frame 44 from stream 1 at ts 42
    
    Last message repeated 1 times
    
*** dropping frame 44 from stream 1 at ts 43
    
*** dropping frame 45 from stream 1 at ts 43
    
    Last message repeated 1 times
    
*** dropping frame 46 from stream 1 at ts 44
    
    Last message repeated 1 times
    
*** dropping frame 47 from stream 1 at ts 45
    
    Last message repeated 1 times
    
*** dropping frame 47 from stream 1 at ts 46
    
*** dropping frame 48 from stream 1 at ts 46
    
    Last message repeated 1 times
    
*** dropping frame 49 from stream 1 at ts 47
    
    Last message repeated 1 times
    
*** dropping frame 50 from stream 1 at ts 48
    
    Last message repeated 1 times
    
*** dropping frame 50 from stream 1 at ts 49
    
*** dropping frame 51 from stream 1 at ts 49
    
    Last message repeated 1 times
    
*** dropping frame 52 from stream 1 at ts 50
    
    Last message repeated 1 times
    
*** dropping frame 53 from stream 1 at ts 51
    
    Last message repeated 1 times
    
[h264 @ 0x9844a00] error while decoding MB 58 12, bytestream -5
    
[h264 @ 0x9844a00] concealing 1311 DC, 1311 AC, 1311 MV errors in B frame
    
*** dropping frame 53 from stream 1 at ts 52
    
No more output streams to write to, finishing.
    
frame=   55 fps= 42 q=4.3 Lsize=     152kB time=00:00:03.66 bitrate= 339.6kbits/s dup=0 drop=119
    
video:116kB audio:26kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 6.760316%
    
Input file #0 (http://source.com/1.ts):
    
  Input stream #0:0 (video): 174 packets read (220322 bytes); 174 frames decoded;
    
  Input stream #0:1 (audio): 156 packets read (36657 bytes); 156 frames decoded (159744 samples);
    
  Total: 330 packets (256979 bytes) demuxed
    
Output file #0 (http://127.0.0.1:8090/feed1.ffm):
    
  Output stream #0:0 (audio): 72 frames encoded (73383 samples); 72 packets muxed (26712 bytes);
    
  Output stream #0:1 (video): 55 frames encoded; 55 packets muxed (119080 bytes);
    
  Total: 127 packets (145792 bytes) muxed

    Here input url file info After i download it to my PC with IDM

    General
    
ID                             : 1 (0x1)
    
Complete name                  : D:\1.ts
    
Format                         : MPEG-TS
    
File size                      : 256 KiB
    
Duration                       : 2 s 520 ms
    
Overall bit rate mode          : Variable
    
Overall bit rate               : 788 kb/s
    

    
Video
    
ID                             : 256 (0x100)
    
Menu ID                        : 1 (0x1)
    
Format                         : AVC
    
Format/Info                    : Advanced Video Codec
    
Format profile                 : High@L3.1
    
Format settings, CABAC         : Yes
    
Format settings, RefFrames     : 2 frames
    
Codec ID                       : 27
    
Duration                       : 2 s 680 ms
    
Width                          : 960 pixels
    
Height                         : 540 pixels
    
Display aspect ratio           : 16:9
    
Frame rate                     : 50.000 FPS
    
Color space                    : YUV
    
Chroma subsampling             : 4:2:0
    
Bit depth                      : 8 bits
    
Scan type                      : Progressive
    

    
Audio
    
ID                             : 257 (0x101)
    
Menu ID                        : 1 (0x1)
    
Format                         : AAC
    
Format/Info                    : Advanced Audio Codec
    
Format version                 : Version 4
    
Format profile                 : LC
    
Muxing mode                    : ADTS
    
Codec ID                       : 15
    
Duration                       : 2 s 69 ms
    
Bit rate mode                  : Variable
    
Channel(s)                     : 2 channels
    
Channel positions              : Front: L R
    
Sampling rate                  : 48.0 kHz
    
Frame rate                     : 46.875 FPS (1024 SPF)
    
Compression mode               : Lossy
    
Delay relative to video        : -12 ms
    

    
Menu
    
ID                             : 4096 (0x1000)
    
Menu ID                        : 1 (0x1)
    
Duration                       : 2 s 520 ms
    
List                           : 256 (0x100) (AVC) / 257 (0x101) (AAC)
    
Service name                   : Service01
    
Service provider               : FFmpeg
    
Service type                   : digital television

Navigation