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  • ffmpeg producing empty MP4 files

    3 mai 2017, par Joshua Dowell

    I am trying to use ffmpeg to convert MTS files to MP4 files. It seems as though the command is running correctly, but the resulting files end up being empty.

    joshua@joshua-VirtualBox:~$ ffmpeg -i /media/sf_2017-04/SD_044/00007.MTS /media/sf_2017-04/SD_04/000007.mp4
    
ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2000-2014 the Libav developers
    
  built on Apr  1 2016 14:28:02 with gcc 4.6.3
    
The ffmpeg program is only provided for script compatibility and will be removed
    
in a future release. It has been deprecated in the Libav project to allow for
    
incompatible command line syntax improvements in its replacement called avconv
    
(see Changelog for details). Please use avconv instead.
    
Input #0, mpegts, from '/media/sf_2017-04/SD_044/00007.MTS':
    
  Duration: 00:01:17.07, start: 1.927822, bitrate: 25053 kb/s
    
  Program 1 
    
    Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    
    Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
    
    Stream #0.2[0x1200]: Data: [144][0][0][0] / 0x0090
    
File '/media/sf_2017-04/SD_04/000007.mp4' already exists. Overwrite ? [y/N] y
    
[buffer @ 0x88772a0] w:1920 h:1080 pixfmt:yuv420p
    
ffmpeg -i /media/sf_2017-04/SD_044/00007.MTS /media/sf_2017-04/SD_04/000007.mp4
    
ffmpeg version 0.8.17-4:0.8.17-0ubuntu0.12.04.2, Copyright (c) 2000-2014 the Libav developers
    
  built on Apr  1 2016 14:28:02 with gcc 4.6.3
    
The ffmpeg program is only provided for script compatibility and will be removed
    
in a future release. It has been deprecated in the Libav project to allow for
    
incompatible command line syntax improvements in its replacement called avconv
    
(see Changelog for details). Please use avconv instead.
    
Input #0, mpegts, from '/media/sf_2017-04/SD_044/00007.MTS':
    
  Duration: 00:01:17.07, start: 1.927822, bitrate: 25053 kb/s
    
  Program 1 
    
    Stream #0.0[0x1011]: Video: h264 (High), yuv420p, 1920x1080 [PAR 1:1 DAR 16:9], 59.96 fps, 59.94 tbr, 90k tbn, 119.88 tbc
    
    Stream #0.1[0x1100]: Audio: ac3, 48000 Hz, stereo, s16, 256 kb/s
    
    Stream #0.2[0x1200]: Data: [144][0][0][0] / 0x0090
    
File '/media/sf_2017-04/SD_04/000007.mp4' already exists. Overwrite ? [y/N] y
    
[buffer @ 0x88772a0] w:1920 h:1080 pixfmt:yuv420p
    
encoder 'aac' is experimental and might produce bad results.
    
Add '-strict experimental' if you want to use it.

  • ffmpeg send udp stream

    26 avril 2017, par Luzwitz

    I stream my screen and i want send stream on a server with udp.

    So, I have this command :

    ffmpeg -ss 00:00:00 -s 1920x1080 -f x11grab -i :0.0+0,0 -copyts -vf "scale=-1:min(ih*1920/iw\,1080),pad=1920:1080:(1920-iw)/2:(1080-ih)/2:black" -c:v libvpx -b:v 4M -crf 16 -quality realtime -cpu-used 8 -c:a libvorbis -f webm udp://127.0.0.1:8080

    And server in C :

    int sock, clientlen, n, port = 8080;
    
char buf[1024], *host;
    

    
FILE *file;
    

    
struct sockaddr_in serveraddr;
    
struct sockaddr_in clientaddr;
    
struct hostent *hostp;
    

    
sock = socket(AF_INET, SOCK_DGRAM, 0);
    

    
bzero((char *) &serveraddr, sizeof(serveraddr));
    

    
serveraddr.sin_family = AF_INET;
    
serveraddr.sin_addr.s_addr = htonl(INADDR_ANY);
    
serveraddr.sin_port = htons((unsigned short)port);
    

    
if(bind(sock, (struct sockaddr *) &serveraddr, sizeof(serveraddr)) < 0) 
    
    clientlen = sizeof(clientaddr);
    

    
file = fopen("out.webm", "wb"));
    

    
printf("En attente de données...\n");
    

    
while(1)
    
{
    
    bzero(buf, 1024);
    

    
    n = recvfrom(sock, buf, 1024, 0, (struct sockaddr *) &clientaddr, &clientlen);
    

    
    hostp = gethostbyaddr((const char *)&clientaddr.sin_addr.s_addr, sizeof(clientaddr.sin_addr.s_addr), AF_INET);
    

    
    host = inet_ntoa(clientaddr.sin_addr);
    

    
    fwrite(buf, n, 1, file);
    
}

    And, when i play out.webm, i haven’t video.

  • ffmpeg concat only continues audio, not video

    23 avril 2017, par Stefan

    I’m trying to concat 3 videos with ffmpeg. Here the code I use.

    ffmpeg -f concat -safe 0 -i c:/ffmpeg/data/mylist.txt -c copy output.mp4

    In my first try the first video played for the set time and then nothing more happened. There I tried to sync the audio and ran the following on all videos.

    ffmpeg -i c:/ffmpeg/data/intro.mp4 -af apad -c:v copy -b:a 384k -shortest -avoid_negative_ts make_zero -fflags +genpts intro.mp4

    After running the concat again, now the audio from all 3 files play throughout the video, but only the video from the first video shows throughout the whole video.

    I’ve tried to to get the video tracks in the same encoding with the following without any changed in th concat result.

    ffmpeg -i c:/ffmpeg/data/video1.mp4 -r 24 video1.mp4

    AND

    ffmpeg -i c:/ffmpeg/data/video1.mp4 -af apad -c:v copy -b:v 64k -b:a 384k -shortest -avoid_negative_ts make_zero -fflags +genpts video1.mp4

    Here the ffprobe results for the 3 videos

    * FILE1 - INTRO *

    [STREAM]
    
index=0
    
codec_name=mpeg4
    
codec_long_name=MPEG-4 part 2
    
profile=Simple Profile
    
codec_type=video
    
codec_time_base=9899/237568
    
codec_tag_string=mp4v
    
codec_tag=0x7634706d
    
width=1920
    
height=1080
    
coded_width=1920
    
coded_height=1080
    
has_b_frames=0
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=16:9
    
pix_fmt=yuv420p
    
level=1
    
color_range=N/A
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=left
    
field_order=unknown
    
timecode=N/A
    
refs=1
    
quarter_sample=false
    
divx_packed=false
    
id=N/A
    
r_frame_rate=24/1
    
avg_frame_rate=237568/9899
    
time_base=1/12288
    
start_pts=0
    
start_time=0.000000
    
duration_ts=118788
    
duration=9.666992
    
bit_rate=7558738
    
max_bit_rate=7558738
    
bits_per_raw_sample=N/A
    
nb_frames=232
    
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:language=und
    
TAG:handler_name=VideoHandler
    
[/STREAM]
    
[FORMAT]
    
filename=c:/ffmpeg/data/intro.mp4
    
nb_streams=1
    
nb_programs=0
    
format_name=mov,mp4,m4a,3gp,3g2,mj2
    
format_long_name=QuickTime / MOV
    
start_time=0.000000
    
duration=9.667000
    
size=9135788
    
bit_rate=7560391
    
probe_score=100
    
TAG:major_brand=isom
    
TAG:minor_version=512
    
TAG:compatible_brands=isomiso2mp41
    
TAG:encoder=Lavf57.72.101
    
[/FORMAT]

    * FILE3 - VIDEO1 *

        [STREAM]
    
index=0
    
codec_name=h264
    
codec_long_name=H.264 / AVC / MPEG-4 AVC / MPEG-4 part 10
    
profile=High
    
codec_type=video
    
codec_time_base=1/48
    
codec_tag_string=avc1
    
codec_tag=0x31637661
    
width=1280
    
height=720
    
coded_width=1280
    
coded_height=720
    
has_b_frames=2
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=16:9
    
pix_fmt=yuv420p
    
level=31
    
color_range=N/A
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=left
    
field_order=unknown
    
timecode=N/A
    
refs=1
    
is_avc=true
    
nal_length_size=4
    
id=N/A
    
r_frame_rate=24/1
    
avg_frame_rate=24/1
    
time_base=1/12288
    
start_pts=0
    
start_time=0.000000
    
duration_ts=470016
    
duration=38.250000
    
bit_rate=1550579
    
max_bit_rate=N/A
    
bits_per_raw_sample=8
    
nb_frames=918
    
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:language=und
    
TAG:handler_name=VideoHandler
    
[/STREAM]
    
[STREAM]
    
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=1
    
channel_layout=mono
    
bits_per_sample=0
    
id=N/A
    
r_frame_rate=0/0
    
avg_frame_rate=0/0
    
time_base=1/44100
    
start_pts=0
    
start_time=0.000000
    
duration_ts=1679328
    
duration=38.080000
    
bit_rate=70141
    
max_bit_rate=70141
    
bits_per_raw_sample=N/A
    
nb_frames=1641
    
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:language=und
    
TAG:handler_name=SoundHandler
    
[/STREAM]
    
[FORMAT]
    
filename=c:/ffmpeg/data/video1.mp4
    
nb_streams=2
    
nb_programs=0
    
format_name=mov,mp4,m4a,3gp,3g2,mj2
    
format_long_name=QuickTime / MOV
    
start_time=0.000000
    
duration=38.250000
    
size=7778497
    
bit_rate=1626875
    
probe_score=100
    
TAG:major_brand=isom
    
TAG:minor_version=512
    
TAG:compatible_brands=isomiso2avc1mp41
    
TAG:encoder=Lavf57.72.101
    
[/FORMAT]

    * FILE3 - OUTRO *

    [STREAM]
    
index=0
    
codec_name=mpeg4
    
codec_long_name=MPEG-4 part 2
    
profile=Simple Profile
    
codec_type=video
    
codec_time_base=3115/74752
    
codec_tag_string=mp4v
    
codec_tag=0x7634706d
    
width=1920
    
height=1080
    
coded_width=1920
    
coded_height=1080
    
has_b_frames=0
    
sample_aspect_ratio=1:1
    
display_aspect_ratio=16:9
    
pix_fmt=yuv420p
    
level=1
    
color_range=N/A
    
color_space=unknown
    
color_transfer=unknown
    
color_primaries=unknown
    
chroma_location=left
    
field_order=unknown
    
timecode=N/A
    
refs=1
    
quarter_sample=false
    
divx_packed=false
    
id=N/A
    
r_frame_rate=24/1
    
avg_frame_rate=74752/3115
    
time_base=1/12288
    
start_pts=565
    
start_time=0.045980
    
duration_ts=75325
    
duration=6.129964
    
bit_rate=3968655
    
max_bit_rate=3968655
    
bits_per_raw_sample=N/A
    
nb_frames=146
    
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:language=und
    
TAG:handler_name=VideoHandler
    
[/STREAM]
    
[STREAM]
    
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
    
id=N/A
    
r_frame_rate=0/0
    
avg_frame_rate=0/0
    
time_base=1/44100
    
start_pts=0
    
start_time=0.000000
    
duration_ts=268304
    
duration=6.083991
    
bit_rate=266855
    
max_bit_rate=384000
    
bits_per_raw_sample=N/A
    
nb_frames=262
    
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:language=und
    
TAG:handler_name=SoundHandler
    
[/STREAM]
    
[FORMAT]
    
filename=c:/ffmpeg/data/outro.mp4
    
nb_streams=2
    
nb_programs=0
    
format_name=mov,mp4,m4a,3gp,3g2,mj2
    
format_long_name=QuickTime / MOV
    
start_time=0.000000
    
duration=6.084000
    
size=3226018
    
bit_rate=4241969
    
probe_score=100
    
TAG:major_brand=isom
    
TAG:minor_version=512
    
TAG:compatible_brands=isomiso2mp41
    
TAG:encoder=Lavf57.72.101
    
[/FORMAT]

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