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  • FFMPEG trimming video (using select between) doesn't affect overall duration

    5 mai 2022, par srb7

    Completely new to working with FFMPEG, what I'm trying to achieve is applying overlaying graphics at certain positions and times, and cutting out sections of a single input video.

    


    I've worked out the overlaying graphics, so this code is working :

    


    ffmpeg -i /Users/username/projectdir/static/video.mp4 \
  -i overlay.png -i overlay2.png \
  -filter_complex "[0:v][1:v] overlay=192:108:enable='between(t, 0, 5)'[ov0]; 
                   [ov0] overlay=192:108:enable='between(t, 5, 10)'" \
  -pix_fmt yuv420p output_overlayed.mp4


    


    But when I try to cut out sections using this code :

    


    ffmpeg -i /Users/username/projectdir/static/video.mp4 \
  -i overlay.png -i overlay2.png \
  -filter_complex "[0:v][1:v] overlay=192:108:enable='between(t, 0, 5)'[ov0]; \
                   [ov0] overlay=192:108:enable='between(t, 5, 10)', \
                      select='between(t,0,5)+between(t,10,15)', \
                      setpts='N/FRAME_RATE/TB'" \
  -pix_fmt yuv420p output_overlayed_trimmed.mp4


    


    It seems to cut correctly, so the original video starts playing from 0 seconds until 5 seconds and then plays from 10 seconds in until 15 seconds and cuts out. But after the point where the video cuts out it's just a black screen for the duration of the video. I can't seem to get it to work so it affects the overall duration of the video.

    


    (The values being passed in are just examples by the way, eg. I've got it to start an overlay 5 seconds in but also cut 5 seconds in)

    


    I have the timestamps for when the overlays should appear on the non-trimmed video, so the overlaying should happen first and then the trimming. If the video is trimmed first then the overlays will appear at the wrong times.

    


    An alternative way of achieving this that is currently working is by performing the first line of code (which just produces a new video file with the overlay) and then separately take this new file and perform the trimming independently :

    


    ffmpeg -ss 0 -to 5 -i /Users/username/projectdir/static/output_overlayed.mp4 \
  -ss 15 -to 20 -i /Users/username/projectdir/static/output_overlayed.mp4 \
  -filter_complex "[0][1]concat=n=2:v=1:a=1" output_trimmed.mp4


    


    But this means working with 2 separate files and then having to remove the first after the 2nd execution is complete. Ideally I'd combine them into one command which doesn't produce multiple files.

    


    Would appreciate any help - thanks !

    


  • cutting video using ffmpeg cannot produce videos with specified length

    22 juin 2021, par david

    I have some mp4 videos and I want to split them into 2-second videos. my GOP is 2 Sec. for this aim I use the following command :

    


    ffmpeg -i input.mp4 -c copy -map 0 -segment_time 00:00:02 -f segment -reset_timestamps 1 output%03d.mp4


    


    but after splitting, my new videos have different duration times. some of them are 4 Sec, one of them is 3.67 Sec. why the duration time is different from the thing I specified in command ? my command is wrong ?
is it possible to split based on frame number ? for example each 120 frame ?

    


  • ffmpeg Transcoding Stops After Few Seconds [migrated]

    15 avril 2018, par Salem F

    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 for 11 sec and stop.

    The 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. By the way, I tried with source with VLC player and it didn’t stop playing the the same source video.

    I decided 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) : (

    # 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

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