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  • Specifying audio/video for a multiple stream/multiple file setup using ffmpeg

    31 mai 2018, par Robert Smith

    Folks, I have the following ffmpeg command :

    ffmpeg
    
    -i video1a -i video2a -i video3a -i video4a
    
    -i video1b -i video2b -i video3b -i video4b
    
    -i video1c
    
    -filter_complex "
    
        nullsrc=size=640x480 [base];
    
        [0:v] setpts=PTS-STARTPTS+   0/TB, scale=320x240 [1a];
    
        [1:v] setpts=PTS-STARTPTS+ 300/TB, scale=320x240 [2a];
    
        [2:v] setpts=PTS-STARTPTS+ 400/TB, scale=320x240 [3a];
    
        [3:v] setpts=PTS-STARTPTS+ 400/TB, scale=320x240 [4a];
    
        [4:v] setpts=PTS-STARTPTS+2500/TB, scale=320x240 [1b];
    
        [5:v] setpts=PTS-STARTPTS+ 800/TB, scale=320x240 [2b];
    
        [6:v] setpts=PTS-STARTPTS+ 700/TB, scale=320x240 [3b];
    
        [7:v] setpts=PTS-STARTPTS+ 800/TB, scale=320x240 [4b];
    
        [8:v] setpts=PTS-STARTPTS+3000/TB, scale=320x240 [1c];
    
        [base][1a] overlay=eof_action=pass [o1];
    
        [o1][1b] overlay=eof_action=pass [o1];
    
        [o1][1c] overlay=eof_action=pass:shortest=1 [o1];
    
        [o1][2a] overlay=eof_action=pass:x=320 [o2];
    
        [o2][2b] overlay=eof_action=pass:x=320 [o2];
    
        [o2][3a] overlay=eof_action=pass:y=240 [o3];
    
        [o3][3b] overlay=eof_action=pass:y=240 [o3];
    
        [o3][4a] overlay=eof_action=pass:x=320:y=240[o4];
    
        [o4][4b] overlay=eof_action=pass:x=320:y=240"
    
    -c:v libx264 output.mp4

    I have just found out something regarding the files I will be processing with above command : that some mp4 files are video/audio, some mp4 files are audio alone and some mp4 files are video alone. I am already able to determine which ones have audio/video/both using ffprobe. My question is how do I modify above command to state what each file contains (video/audio/both).

    This is the scenario of which file has video/audio/both :

    video   time
    
======= =========
    
Area 1:
    
video1a    audio
    
video1b     both
    
video1c    video
    

    
Area 2:
    
video2a    video
    
video2b    audio
    

    
Area 3:
    
video3a    video
    
video3b    audio
    

    
Area 4:
    
video4a    video
    
video4b    both

    My question is how to correctly modify command above to specify what the file has (audio/video/both). Thank you.

    Update #1

    I ran test as follows :

    -i "video1a.flv"
    
-i "video1b.flv"
    
-i "video1c.flv"
    
-i "video2a.flv"
    
-i "video3a.flv"
    
-i "video4a.flv"
    
-i "video4b.flv"
    
-i "video4c.flv"
    
-i "video4d.flv"
    
-i "video4e.flv"
    

    
-filter_complex 
    

    
nullsrc=size=640x480[base];
    
[0:v]setpts=PTS-STARTPTS+120/TB,scale=320x240[1a];
    
[1:v]setpts=PTS-STARTPTS+3469115/TB,scale=320x240[1b];
    
[2:v]setpts=PTS-STARTPTS+7739299/TB,scale=320x240[1c];
    
[5:v]setpts=PTS-STARTPTS+4390466/TB,scale=320x240[4a];
    
[6:v]setpts=PTS-STARTPTS+6803937/TB,scale=320x240[4b];
    
[7:v]setpts=PTS-STARTPTS+8242005/TB,scale=320x240[4c];
    
[8:v]setpts=PTS-STARTPTS+9811577/TB,scale=320x240[4d];
    
[9:v]setpts=PTS-STARTPTS+10765190/TB,scale=320x240[4e];
    
[base][1a]overlay=eof_action=pass[o1];
    
[o1][1b]overlay=eof_action=pass[o1];
    
[o1][1c]overlay=eof_action=pass:shortest=1[o1];
    
[o1][4a]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4b]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4c]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4d]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4e]overlay=eof_action=pass:x=320:y=240;
    
[0:a]asetpts=PTS-STARTPTS+120/TB,aresample=async=1,apad[a1a];
    
[1:a]asetpts=PTS-STARTPTS+3469115/TB,aresample=async=1,apad[a1b];
    
[2:a]asetpts=PTS-STARTPTS+7739299/TB,aresample=async=1[a1c];
    
[3:a]asetpts=PTS-STARTPTS+82550/TB,aresample=async=1,apad[a2a];
    
[4:a]asetpts=PTS-STARTPTS+2687265/TB,aresample=async=1,apad[a3a];
    
[a1a][a1b][a1c][a2a][a3a]amerge=inputs=5
    

    
-c:v libx264 -c:a aac -ac 2 output.mp4

    This is the stream data from ffmpeg :

    Input #0
    
  Stream #0:0: Video: vp6f, yuv420p, 160x128, 1k tbr, 1k tbn
    
  Stream #0:1: Audio: nellymoser, 11025 Hz, mono, flt
    

    
Input #1
    
  Stream #1:0: Audio: nellymoser, 11025 Hz, mono, flt
    
  Stream #1:1: Video: vp6f, yuv420p, 160x128, 1k tbr, 1k tbn
    

    
Input #2
    
  Stream #2:0: Audio: nellymoser, 11025 Hz, mono, flt
    
  Stream #2:1: Video: vp6f, yuv420p, 160x128, 1k tbr, 1k tbn
    

    
Input #3
    
  Stream #3:0: Audio: nellymoser, 11025 Hz, mono, flt
    

    
Input #4
    
  Stream #4:0: Audio: nellymoser, 11025 Hz, mono, flt
    

    
Input #5
    
  Stream #5:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
    

    
Input #6
    
  Stream #6:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
    

    
Input #7
    
  Stream #7:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
    

    
Input #8
    
  Stream #8:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn
    

    
Input #9
    
  Stream #9:0: Video: vp6f, yuv420p, 1680x1056, 1k tbr, 1k tbn

    This is the error :

    Stream mapping:
    
  Stream #0:0 (vp6f) -> setpts
    
  Stream #0:1 (nellymoser) -> asetpts
    

    
  Stream #1:0 (nellymoser) -> asetpts
    
  Stream #1:1 (vp6f) -> setpts
    

    
  Stream #2:0 (nellymoser) -> asetpts
    
  Stream #2:1 (vp6f) -> setpts
    

    
  Stream #3:0 (nellymoser) -> asetpts
    

    
  Stream #4:0 (nellymoser) -> asetpts
    

    
  Stream #5:0 (vp6f) -> setpts
    

    
  Stream #6:0 (vp6f) -> setpts
    

    
  Stream #7:0 (vp6f) -> setpts
    

    
  Stream #8:0 (vp6f) -> setpts
    

    
  Stream #9:0 (vp6f) -> setpts
    

    
  overlay -> Stream #0:0 (libx264)
    
  amerge -> Stream #0:1 (aac)
    
Press [q] to stop, [?] for help
    

    
Enter command: <target>|all <time>|-1 <command>[ <argument>]
    

    
Parse error, at least 3 arguments were expected, only 1 given in string 'ho Oscar'
    
[Parsed_amerge_39 @ 0aa147c0] No channel layout for input 1
    
    Last message repeated 1 times
    
[AVFilterGraph @ 05e01900] The following filters could not choose their formats: Parsed_amerge_39
    
Consider inserting the (a)format filter near their input or output.
    
Error reinitializing filters!
    
Failed to inject frame into filter network: I/O error
    
Error while processing the decoded data for stream #4:0
    
Conversion failed!
    
</argument></command></time></target>

    Update #2

    Would it be like this :

    -i "video1a.flv"
    
-i "video1b.flv"
    
-i "video1c.flv"
    
-i "video2a.flv"
    
-i "video3a.flv"
    
-i "video4a.flv"
    
-i "video4b.flv"
    
-i "video4c.flv"
    
-i "video4d.flv"
    
-i "video4e.flv"
    

    
-filter_complex 
    

    
nullsrc=size=640x480[base];
    
[0:v]setpts=PTS-STARTPTS+120/TB,scale=320x240[1a];
    
[1:v]setpts=PTS-STARTPTS+3469115/TB,scale=320x240[1b];
    
[2:v]setpts=PTS-STARTPTS+7739299/TB,scale=320x240[1c];
    
[5:v]setpts=PTS-STARTPTS+4390466/TB,scale=320x240[4a];
    
[6:v]setpts=PTS-STARTPTS+6803937/TB,scale=320x240[4b];
    
[7:v]setpts=PTS-STARTPTS+8242005/TB,scale=320x240[4c];
    
[8:v]setpts=PTS-STARTPTS+9811577/TB,scale=320x240[4d];
    
[9:v]setpts=PTS-STARTPTS+10765190/TB,scale=320x240[4e];
    
[base][1a]overlay=eof_action=pass[o1];
    
[o1][1b]overlay=eof_action=pass[o1];
    
[o1][1c]overlay=eof_action=pass:shortest=1[o1];
    
[o1][4a]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4b]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4c]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4d]overlay=eof_action=pass:x=320:y=240[o4];
    
[o4][4e]overlay=eof_action=pass:x=320:y=240;
    
[0:a]asetpts=PTS-STARTPTS+120/TB,aresample=async=1,pan=1c|c0=c0,apad[a1a];
    
[1:a]asetpts=PTS-STARTPTS+3469115/TB,aresample=async=1,pan=1c|c0=c0,apad[a1b];
    
[2:a]asetpts=PTS-STARTPTS+7739299/TB,aresample=async=1,pan=1c|c0=c0[a1c];
    
[3:a]asetpts=PTS-STARTPTS+82550/TB,aresample=async=1,pan=1c|c0=c0,apad[a2a];
    
[4:a]asetpts=PTS-STARTPTS+2687265/TB,aresample=async=1,pan=1c|c0=c0,apad[a3a];
    
[a1a][a1b][a1c][a2a][a3a]amerge=inputs=5
    

    
-c:v libx264 -c:a aac -ac 2 output.mp4

    Update #3

    Now getting this error :

    Stream mapping:
    
  Stream #0:0 (vp6f) -> setpts
    
  Stream #0:1 (nellymoser) -> asetpts
    
  Stream #1:0 (nellymoser) -> asetpts
    
  Stream #1:1 (vp6f) -> setpts
    
  Stream #2:0 (nellymoser) -> asetpts
    
  Stream #2:1 (vp6f) -> setpts
    
  Stream #3:0 (nellymoser) -> asetpts
    
  Stream #4:0 (nellymoser) -> asetpts
    
  Stream #5:0 (vp6f) -> setpts
    
  Stream #6:0 (vp6f) -> setpts
    
  Stream #7:0 (vp6f) -> setpts
    
  Stream #8:0 (vp6f) -> setpts
    
  Stream #9:0 (vp6f) -> setpts
    
  overlay -> Stream #0:0 (libx264)
    
  amerge -> Stream #0:1 (aac)
    
Press [q] to stop, [?] for help
    

    
Enter command: <target>|all <time>|-1 <command>[ <argument>]
    

    
Parse error, at least 3 arguments were expected, only 1 given in string 'ho Oscar'
    
[Parsed_amerge_44 @ 0a9808c0] No channel layout for input 1
    
[Parsed_amerge_44 @ 0a9808c0] Input channel layouts overlap: output layout will be determined by the number of distinct input channels
    
[Parsed_pan_27 @ 07694800] Pure channel mapping detected: 0
    
[Parsed_pan_31 @ 07694a80] Pure channel mapping detected: 0
    
[Parsed_pan_35 @ 0a980300] Pure channel mapping detected: 0
    
[Parsed_pan_38 @ 0a980500] Pure channel mapping detected: 0
    
[Parsed_pan_42 @ 0a980780] Pure channel mapping detected: 0
    
[libx264 @ 06ad78c0] using SAR=1/1
    
[libx264 @ 06ad78c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
    
[libx264 @ 06ad78c0] profile High, level 3.0
    
[libx264 @ 06ad78c0] 264 - core 155 r2901 7d0ff22 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=1 ref=3 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=7 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=-2 threads=15 lookahead_threads=2 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
    
Output #0, mp4, to 'output.mp4':
    
  Metadata:
    
    canSeekToEnd    : false
    
    encoder         : Lavf58.16.100
    
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 640x480 [SAR 1:1 DAR 4:3], q=-1--1, 25 fps, 12800 tbn, 25 tbc (default)
    
    Metadata:
    
      encoder         : Lavc58.19.102 libx264
    
    Side data:
    
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    
    Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 11025 Hz, stereo, fltp, 128 kb/s (default)
    
    Metadata:
    
      encoder         : Lavc58.19.102 aac
    
...
    
...
    
Error while processing the decoded data for stream #1:1
    
[libx264 @ 06ad78c0] frame I:133   Avg QP: 8.58  size:  6481
    
[libx264 @ 06ad78c0] frame P:8358  Avg QP:17.54  size:  1386
    
[libx264 @ 06ad78c0] frame B:24582 Avg QP:24.27  size:   105
    
[libx264 @ 06ad78c0] consecutive B-frames:  0.6%  0.5%  0.7% 98.1%
    
[libx264 @ 06ad78c0] mb I  I16..4: 78.3% 16.1%  5.6%
    
[libx264 @ 06ad78c0] mb P  I16..4:  0.3%  0.7%  0.1%  P16..4:  9.6%  3.0%  1.4%  0.0%  0.0%    skip:84.9%
    
[libx264 @ 06ad78c0] mb B  I16..4:  0.0%  0.0%  0.0%  B16..8:  2.9%  0.1%  0.0%  direct: 0.2%  skip:96.8%  L0:47.0% L1:49.0% BI: 4.0%
    
[libx264 @ 06ad78c0] 8x8 transform intra:35.0% inter:70.1%
    
[libx264 @ 06ad78c0] coded y,uvDC,uvAC intra: 36.8% 43.7% 27.3% inter: 1.6% 3.0% 0.1%
    
[libx264 @ 06ad78c0] i16 v,h,dc,p: 79%  8%  4%  9%
    
[libx264 @ 06ad78c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 32% 20% 12%  3%  6%  8%  6%  5%  7%
    
[libx264 @ 06ad78c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 38% 22%  9%  4%  6%  7%  5%  5%  4%
    
[libx264 @ 06ad78c0] i8c dc,h,v,p: 62% 15% 16%  7%
    
[libx264 @ 06ad78c0] Weighted P-Frames: Y:0.6% UV:0.5%
    
[libx264 @ 06ad78c0] ref P L0: 65.4% 12.3% 14.3%  7.9%  0.0%
    
[libx264 @ 06ad78c0] ref B L0: 90.2%  7.5%  2.3%
    
[libx264 @ 06ad78c0] ref B L1: 96.3%  3.7%
    
[libx264 @ 06ad78c0] kb/s:90.81
    
[aac @ 06ad8480] Qavg: 65519.970
    
[aac @ 06ad8480] 2 frames left in the queue on closing
    
Conversion failed!
    
</argument></command></time></target>

  • ffmpeg and pulse audio creating buzzy speech

    17 juin 2017, par flashape

    I’m attempting to record video and audio from an ec2 instance (Ubuntu 16.04), using xvfb and pulse audio. Everything works fine, except that the output file contains "buzzy" speech (not sure if this is what "clipping" is ?). This happens using either aac or mp3 audio codecs.

    Sample audio file : http://s000.tinyupload.com/index.php?file_id=86237391396073526211

    ffmpeg command :

    ffmpeg \
    
-f x11grab -framerate 30 -video_size ${SCREEN_WIDTH}x${SCREEN_HEIGHT} -i :1.0 \
    
-f pulse -i default \
    
-c:v libx264 -preset veryfast -maxrate 2500k -bufsize 2500k -vf "format=yuv420p" -g 60 \
    
-c:a aac -strict -2 -channel_layout stereo  -ab 256k -ar 48000 -bufsize 512k -ac 2  \
    
-flags +global_header -f flv "test.mp4"

    The output from ffmpeg when I run the command :

    Input #0, x11grab, from ':1.0':
    
  Duration: N/A, start: 1497567394.762052, bitrate: N/A
    
    Stream #0:0: Video: rawvideo (BGR[0] / 0x524742), bgr0, 1360x764, 30 fps, 30 tbr, 1000k tbn, 30 tbc
    
Guessed Channel Layout for  Input Stream #1.0 : stereo
    
Input #1, pulse, from 'default':
    
  Duration: N/A, start: 1497567396.743667, bitrate: 1536 kb/s
    
    Stream #1:0: Audio: pcm_s16le, 48000 Hz, 2 channels, s16, 1536 kb/s
    
[libx264 @ 0x1977d20] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 AVX2 LZCNT BMI2
    
[libx264 @ 0x1977d20] profile High, level 3.2
    
[libx264 @ 0x1977d20] 264 - core 148 r2643 5c65704 - H.264/MPEG-4 AVC codec - Copyleft 2003-2015 - http://www.videolan.org/x264.html - options: cabac=1 ref=1 deblock=1:0:0 analyse=0x3:0x113 me=hex subme=2 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=0 8x8dct=1 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=3 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=3 b_pyramid=2 b_adapt=1 b_bias=0 direct=1 weightb=1 open_gop=0 weightp=1 keyint=60 keyint_min=6 scenecut=40 intra_refresh=0 rc_lookahead=10 rc=crf mbtree=1 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=2500 vbv_bufsize=512 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00
    
Output #0, flv, to 'test.mp4':
    
  Metadata:
    
    encoder         : Lavf56.40.101
    
    Stream #0:0: Video: h264 (libx264) ([7][0][0][0] / 0x0007), yuv420p, 1360x764, q=-1--1, max. 2500 kb/s, 30 fps, 1k tbn, 30 tbc
    
    Metadata:
    
      encoder         : Lavc56.60.100 libx264
    
    Stream #0:1: Audio: aac ([10][0][0][0] / 0x000A), 48000 Hz, stereo, fltp, 256 kb/s
    
    Metadata:
    
      encoder         : Lavc56.60.100 aac
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (rawvideo (native) -> h264 (libx264))
    
  Stream #1:0 -> #0:1 (pcm_s16le (native) -> aac (native))

    Based on various posts, I thought it might be something in the pulse config, particularly the "resample-method" setting, but that doesn’t appear to do anything. Here is how the /etc/pulse/daemon.conf config file currently stands :

    ; daemonize = no
    
; fail = yes
    
; allow-module-loading = yes
    
; allow-exit = yes
    
; use-pid-file = yes
    
; system-instance = no
    
; local-server-type = user
    
; enable-shm = yes
    
; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB
    
; lock-memory = no
    
; cpu-limit = no
    

    
; high-priority = yes
    
; nice-level = -11
    

    
; realtime-scheduling = yes
    
; realtime-priority = 5
    

    
; exit-idle-time = 20
    
; scache-idle-time = 20
    

    
; dl-search-path = (depends on architecture)
    

    
; load-default-script-file = yes
    
; default-script-file = /etc/pulse/default.pa
    

    
; log-target = auto
    
; log-level = notice
    
; log-meta = no
    
; log-time = no
    
; log-backtrace = 0
    

    
; resample-method = speex-float-1
    
; resample-method = speex-float-10
    
resample-method = speex-fixed-10
    
; enable-remixing = yes
    
enable-lfe-remixing = yes
    
; lfe-crossover-freq = 120
    

    
flat-volumes = no
    

    
; rlimit-fsize = -1
    
; rlimit-data = -1
    
; rlimit-stack = -1
    
; rlimit-core = -1
    
; rlimit-as = -1
    
; rlimit-rss = -1
    
; rlimit-nproc = -1
    
; rlimit-nofile = 256
    
; rlimit-memlock = -1
    
; rlimit-locks = -1
    
; rlimit-sigpending = -1
    
; rlimit-msgqueue = -1
    
; rlimit-nice = 31
    
; rlimit-rtprio = 9
    
; rlimit-rttime = 200000
    

    
; default-sample-format = s16le
    
default-sample-format = s32le
    
default-sample-rate = 44100
    
; default-sample-rate = 48000
    
; alternate-sample-rate = 48000
    
alternate-sample-rate = 44100
    
; default-sample-channels = 2
    
; default-channel-map = front-left,front-right
    

    
; default-fragments = 4
    
; default-fragment-size-msec = 25
    
; default-fragments = 4
    
; default-fragment-size-msec = 25
    

    

    
; enable-deferred-volume = yes
    
deferred-volume-safety-margin-usec = 1
    
; deferred-volume-extra-delay-usec = 0

    Edit :

    Ok, updated the ffmpeg command to capture only the audio, but still have the same issue :

    ffmpeg \
    
-f pulse -i default \
    
-c:a aac -strict -2 -channel_layout stereo  -ab 256k -ar 48000 -bufsize 512k -ac 2  \
    
test.aac

    I do get some interesting messages in the output about timestamps being off :

    [aac @ 0x12a4900] Queue input is backward in timeits/s
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 175924
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 176948
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 177972
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 178996
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 180020
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 181044
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 182857 >= 182068
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 183406
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 184430
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 185454
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 186478
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 187502
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 188526
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 189550
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 190574
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 169622
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 170646
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 171670
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 172694
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 173718
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 174742
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 175766
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 176790
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 157020
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 158083
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 159107
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 160131
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 161155
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 162179
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 163203
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 164227
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 165251
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 154697
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 159400
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 160424
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 161448
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 162472
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 163496
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 164520
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 165544
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 166568
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 171795
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 172819
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 173843
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 174867
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 175891
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 176915
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 177939
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 178963
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 187279
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 189829
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 190853
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 191877
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 193354 >= 192901
    
[aac @ 0x12a4900] Queue input is backward in time
    
    Last message repeated 2 times
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 216172
    
[aac @ 0x12a4900] Queue input is backward in time
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 214950
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 214933
    
[adts @ 0x12a35a0] Application provided invalid, non monotonically increasing dts to muxer in stream 0: 216609 >= 214836

  • What is wrong with the following ffmpeg command

    9 juin 2017, par Brad

    What is wrong with the following ffmpeg command ? Originally this had -sameq instead of the -qscale:a 0

    Command :

    ffmpeg -loglevel debug -threads 4 -i sample-in.mpg -ss 00:00:01 -t 00:00:05 -f image2 -y sample-frames/frame%d.png -acodec copy -qscale:a 0  -y sample.mp3

    Output

    ffmpeg version 1.2.1 Copyright (c) 2000-2013 the FFmpeg developers
    
  built on Jul  9 2013 04:36:42 with Apple clang version 4.1 (tags/Apple/clang-421.11.66) (based on LLVM 3.1svn)
    
  configuration: --prefix=/usr/local/Cellar/ffmpeg/1.2.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-nonfree --enable-hardcoded-tables --enable-avresample --enable-vda --cc=cc --host-cflags= --host-ldflags= --enable-libx264 --enable-libfaac --enable-libmp3lame --enable-libxvid --enable-ffplay
    
  libavutil      52. 18.100 / 52. 18.100
    
  libavcodec     54. 92.100 / 54. 92.100
    
  libavformat    54. 63.104 / 54. 63.104
    
  libavdevice    54.  3.103 / 54.  3.103
    
  libavfilter     3. 42.103 /  3. 42.103
    
  libswscale      2.  2.100 /  2.  2.100
    
  libswresample   0. 17.102 /  0. 17.102
    
  libpostproc    52.  2.100 / 52.  2.100
    

    
Splitting the commandline.
    
Reading option '-loglevel' ... matched as option 'loglevel' (set libav* logging level) with argument 'debug'.
    
Reading option '-threads' ... matched as AVOption 'threads' with argument '4'.
    
Reading option '-i' ... matched as input file with argument 'sample-in.mpg'.
    
Reading option '-ss' ... matched as option 'ss' (set the start time offset) with argument '00:00:01'.
    
Reading option '-t' ... matched as option 't' (record or transcode "duration" seconds of audio/video) with argument '00:00:05'.
    
Reading option '-f' ... matched as option 'f' (force format) with argument 'image2'.
    
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
    
Reading option 'sample-frames/frame%d.png' ... matched as output file.
    
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'copy'.
    
Reading option '-qscale:a' ... matched as option 'qscale' (use fixed quality scale (VBR)) with argument '0'.
    
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
    
Reading option 'sample.mp3' ... matched as output file.
    
Finished splitting the commandline.
    
Parsing a group of options: global .
    
Applying option loglevel (set libav* logging level) with argument debug.
    
Applying option y (overwrite output files) with argument 1.
    
    Last message repeated 1 times
    
Successfully parsed a group of options.
    
Parsing a group of options: input file sample-in.mpg.
    
Successfully parsed a group of options.
    
Opening an input file: sample-in.mpg.
    
[mpeg @ 0x7ffb4a80f200] Format mpeg probed with size=16384 and score=52
    
[mpeg @ 0x7ffb4a80f200] File position before avformat_find_stream_info() is 0
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2500
    
[mpeg @ 0x7ffb4a80f200] Probe with size=2002, packets=1 detected mpegvideo with score=25
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2499
    
[mpeg @ 0x7ffb4a80f200] Probe with size=4043, packets=2 detected mpegvideo with score=25
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2498
    
[mpeg @ 0x7ffb4a80f200] Probe with size=6084, packets=3 detected mpegvideo with score=25
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2497
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2496
    
[mpeg @ 0x7ffb4a80f200] Probe with size=10166, packets=5 detected mpegvideo with score=25
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2495
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2494
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2493
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2492
    
[mpeg @ 0x7ffb4a80f200] Probe with size=18330, packets=9 detected mpegvideo with score=25
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2491
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2490
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2489
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2488
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2487
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2486
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2485
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2484
    
[mpeg @ 0x7ffb4a80f200] Probe with size=34658, packets=17 detected mpegvideo with score=25
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2483
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2482
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2481
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2480
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2479
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2478
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2477
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2476
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2475
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2474
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2473
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2472
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2471
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2470
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2469
    
[mpeg @ 0x7ffb4a80f200] probing stream 0 pp:2468
    
[mpeg @ 0x7ffb4a80f200] Probe with size=67266, packets=33 detected mpegvideo with score=51
    
[mpeg @ 0x7ffb4a80f200] probed stream 0
    
[mpeg @ 0x7ffb4a80f200] first_dts 86997 not matching first dts 93003 in the queue
    
    Last message repeated 3 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 86997 not matching first dts 108018 in the queue
    
    Last message repeated 3 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 111600 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 135360 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 156960 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 180720 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 202320 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 226080 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 247680 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 271440 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 295200 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 316800 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 340560 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 362160 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 385920 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 407520 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 431280 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 452880 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 476640 in the queue
    
    Last message repeated 8 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 498240 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] first_dts 90000 not matching first dts 522000 in the queue
    
    Last message repeated 9 times
    
[mpeg @ 0x7ffb4a80f200] max_analyze_duration 5000000 reached at 5005000 microseconds
    
[mpeg @ 0x7ffb4a80f200] File position after avformat_find_stream_info() is 0
    
Input #0, mpeg, from 'sample-in.mpg':
    
  Duration: 00:00:05.97, start: 1.000000, bitrate: 6827 kb/s
    
    Stream #0:0[0x1e0], 152, 1/90000: Video: mpeg1video, yuv420p, 704x480 [SAR 200:219 DAR 880:657], 1001/30000, 104857 kb/s, 29.97 fps, 29.97 tbr, 90k tbn, 29.97 tbc
    
    Stream #0:1[0x1c0], 211, 1/90000: Audio: mp2, 48000 Hz, stereo, s16p, 64 kb/s
    
Successfully opened the file.
    
Parsing a group of options: output file sample-frames/frame%d.png.
    
Applying option ss (set the start time offset) with argument 00:00:01.
    
Applying option t (record or transcode "duration" seconds of audio/video) with argument 00:00:05.
    
Applying option f (force format) with argument image2.
    
Successfully parsed a group of options.
    
Opening an output file: sample-frames/frame%d.png.
    
Successfully opened the file.
    
Parsing a group of options: output file sample.mp3.
    
Applying option acodec (force audio codec ('copy' to copy stream)) with argument copy.
    
Applying option qscale:a (use fixed quality scale (VBR)) with argument 0.
    
Successfully parsed a group of options.
    
Opening an output file: sample.mp3.
    
Successfully opened the file.
    
[buffer @ 0x7ffb4a411e40] Setting entry with key 'video_size' to value '704x480'
    
[buffer @ 0x7ffb4a411e40] Setting entry with key 'pix_fmt' to value '0'
    
[buffer @ 0x7ffb4a411e40] Setting entry with key 'time_base' to value '1/90000'
    
[buffer @ 0x7ffb4a411e40] Setting entry with key 'pixel_aspect' to value '200/219'
    
[buffer @ 0x7ffb4a411e40] Setting entry with key 'sws_param' to value 'flags=2'
    
[buffer @ 0x7ffb4a411e40] Setting entry with key 'frame_rate' to value '30000/1001'
    
[graph 0 input from stream 0:0 @ 0x7ffb4a411de0] w:704 h:480 pixfmt:yuv420p tb:1/90000 fr:30000/1001 sar:200/219 sws_param:flags=2
    
[scale @ 0x7ffb4a414800] Setting 'w' to value '0'
    
[scale @ 0x7ffb4a414800] Setting 'h' to value '0'
    
[scale @ 0x7ffb4a414800] Setting 'flags' to value '0x4'
    
[auto-inserted scaler 0 @ 0x7ffb4a414740] w:0 h:0 flags:'0x4' interl:0
    
[format @ 0x7ffb4a42aa20] auto-inserting filter 'auto-inserted scaler 0' between the filter 'Parsed_null_0' and the filter 'format'
    
[auto-inserted scaler 0 @ 0x7ffb4a414740] picking rgb24 out of 7 ref:yuv420p alpha:0
    
[auto-inserted scaler 0 @ 0x7ffb4a414740] w:704 h:480 fmt:yuv420p sar:200/219 -> w:704 h:480 fmt:rgb24 sar:200/219 flags:0x4
    
[png @ 0x7ffb4a831000] detected 4 logical cores
    
[mp3 @ 0x7ffb4a831600] Invalid audio stream. Exactly one MP3 audio stream is required.
    
Output #0, image2, to 'sample-frames/frame%d.png':
    
  Metadata:
    
    encoder         : Lavf54.63.104
    
    Stream #0:0, 0, 1/90000: Video: png, rgb24, 704x480 [SAR 200:219 DAR 880:657], 1001/30000, q=2-31, 200 kb/s, 90k tbn, 29.97 tbc
    
Output #1, mp3, to 'sample.mp3':
    
  Metadata:
    
    encoder         : Lavf54.63.104
    
    Stream #1:0, 0, 1/90000: Audio: mp2, 48000 Hz, stereo, 64 kb/s
    
Stream mapping:
    
  Stream #0:0 -> #0:0 (mpeg1video -> png)
    
  Stream #0:1 -> #1:0 (copy)
    
Could not write header for output file #1 (incorrect codec parameters ?): Invalid argument
    
Statistics: 4542608 bytes read, 2 seeks

    I found the code above from : http://kwlug.org/node/854
    I did a few edits removing the -sameq and replacing it with -qscale:a 0 which probably is wrong.

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