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• Losing audio quality when merging multiple videos with FFmpeg

  30 mai 2021, par Charly

  I am trying to merge multiple videos (a few seconds each) into one, using FFmpeg.

  


  Merging all at once

  


  I first tried merging all videos with one FFmpeg command, but it only seems to work with up to a certain amount of videos. On my Raspberry Pi 4 (2BG RAM), it worked for 16 videos and broke (ran out of memory ?) while merging 36 videos (command and ouput below)

  


  ffmpeg -i 1Rbrdn1Xp.mp4 -i G7eYqdFPb.mp4 -i -Xo-6ABm3.mp4 -i 6As9IlqbW.mp4 -i tz9tVKFA-.mp4
-i MS6DHZoJE.mp4 -i CeJYs99-G.mp4 -i Hsv5X48IC.mp4 -i Gm_DtjNU4.mp4 -i PZytbInZL.mp4
-i qsIJuvKO2.mp4 -i c5wxGk_Fx.mp4 -i j4K1qA7ih.mp4 -i AIpVWuhGV.mp4 -i yiLk0snSh.mp4
-i q1zmytaXZ.mp4 -i VRwQvLxaW.mp4 -i 0_3yLrokH.mp4 -i fW28LPQsk.mp4 -i La6WsGeE8.mp4
-i FlroQnCHq.mp4 -i c7SiL_qSU.mp4 -i aaGTUMJXD.mp4 -i hvXYBaCSM.mp4 -i CMDaFrWM4.mp4
-i _YAGDRyQN.mp4 -i RQXyshs_o.mp4 -i 96pKlIZxW.mp4 -i HVOOeCUYG.mp4 -i pJFxq7BTx.mp4
-i VxMJQqbK5.mp4 -i mkgbViPTI.mp4 -i zrjj93b5c.mp4 -i AL9oG1F36.mp4 -i IsUnC0NPb.mp4
-i Qhj2bhab9.mp4 -y -filter_complex concat=n=36:v=1:a=1 -vsync 2 kn-dQSN-v.mp4


  


  ffmpeg version 4.1.6-1~deb10u1+rpt1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 8 (Raspbian 8.3.0-6+rpi1)
(...)
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '1Rbrdn1Xp.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
  Duration: 00:00:08.08, start: 0.000000, bitrate: 602 kb/s
    Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 533 kb/s, 57.62 fps, 60 tbr, 15360 tbn, 120 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 64 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Input #1, mov,mp4,m4a,3gp,3g2,mj2, from 'G7eYqdFPb.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
  Duration: 00:00:21.00, start: 0.000000, bitrate: 310 kb/s
    Stream #1:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 1280x720 [SAR 1:1 DAR 16:9], 229 kb/s, 59.09 fps, 60 tbr, 15360 tbn, 120 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #1:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 22050 Hz, mono, fltp, 72 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
(...)
Stream mapping:
  Stream #0:0 (h264) -> concat:in0:v0
  Stream #0:1 (aac) -> concat:in0:a0
  Stream #1:0 (h264) -> concat:in1:v0
  Stream #1:1 (aac) -> concat:in1:a0
(...)
  concat:out:v0 -> Stream #0:0 (libx264)
  concat:out:a0 -> Stream #0:1 (aac)
Press [q] to stop, [?] for help
[libx264 @ 0x17cb5e0] using SAR=1/1   0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
[libx264 @ 0x17cb5e0] using cpu capabilities: ARMv6 NEON
[libx264 @ 0x17cb5e0] profile High, level 3.2
[libx264 @ 0x17cb5e0] 264 - core 155 r2917 0a84d98 - 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=6 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=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 'kn-dQSN-v.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    encoder         : Lavf58.20.100
    Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 60 fps, 15360 tbn, 60 tbc (default)
    Metadata:
      encoder         : Lavc58.35.100 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), 22050 Hz, mono, fltp, 69 kb/s (default)
    Metadata:
      encoder         : Lavc58.35.100 aac
frame=15952 fps= 52 q=31.0 size=   10240kB time=00:04:33.02 bitrate= 307.3kbits/s speed=0.844x
[h264 @ 0x3472d80] get_buffer() failed40kB time=00:04:33.02 bitrate= 307.3kbits/s speed=0.844x    
[h264 @ 0x3472d80] thread_get_buffer() failed
[h264 @ 0x3472d80] decode_slice_header error
[h264 @ 0x3472d80] no frame!
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x34f54d0] get_buffer() failed
[h264 @ 0x34f54d0] thread_get_buffer() failed
[h264 @ 0x34f54d0] decode_slice_header error
[h264 @ 0x34f54d0] no frame!
[h264 @ 0x3472d80] get_buffer() failed
[h264 @ 0x3472d80] thread_get_buffer() failed
(...)
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x3472d80] reference picture missing during reorder
[h264 @ 0x3472d80] Missing reference picture, default is 65660
[h264 @ 0x34c4540] mmco: unref short failure
[h264 @ 0x34f54d0] get_buffer() failed08kB time=00:04:45.37 bitrate= 316.0kbits/s speed=0.845x    
[h264 @ 0x34f54d0] thread_get_buffer() failed
[h264 @ 0x34f54d0] decode_slice_header error
[h264 @ 0x34f54d0] no frame!
[h264 @ 0x3472d80] decode_slice_header error
[h264 @ 0x3472d80] no frame!
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x34f54d0] mmco: unref short failure
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x3472d80] get_buffer() failed
[h264 @ 0x3472d80] thread_get_buffer() failed
[h264 @ 0x3472d80] decode_slice_header error
[h264 @ 0x3472d80] no frame!
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x3472d80] get_buffer() failed
[h264 @ 0x3472d80] thread_get_buffer() failed
[h264 @ 0x3472d80] decode_slice_header error
[h264 @ 0x3472d80] no frame!
[h264 @ 0x34f54d0] reference picture missing during reorder
    Last message repeated 1 times
[h264 @ 0x34f54d0] Missing reference picture, default is 65708
    Last message repeated 1 times
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x34dccb0] reference picture missing during reorder
[h264 @ 0x34dccb0] Missing reference picture, default is 65716
[h264 @ 0x3472d80] mmco: unref short failure
[h264 @ 0x34f54d0] decode_slice_header error
[h264 @ 0x34f54d0] no frame!
Error while decoding stream #15:0: Invalid data found when processing inputbits/s speed=0.845x    
[h264 @ 0x3480010] get_buffer() failed
[h264 @ 0x3480010] thread_get_buffer() failed
[h264 @ 0x3480010] decode_slice_header error
[h264 @ 0x3480010] no frame!
[h264 @ 0x34c4540] decode_slice_header error
[h264 @ 0x34c4540] no frame!
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x3480010] mmco: unref short failure
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x34c4540] get_buffer() failed
[h264 @ 0x34c4540] thread_get_buffer() failed
[h264 @ 0x34c4540] decode_slice_header error
[h264 @ 0x34c4540] no frame!
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x34c4540] get_buffer() failed
[h264 @ 0x34c4540] thread_get_buffer() failed
[h264 @ 0x34c4540] decode_slice_header error
[h264 @ 0x34c4540] no frame!
[h264 @ 0x34f54d0] decode_slice_header error
[h264 @ 0x34f54d0] no frame!
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x3480010] reference picture missing during reorder
    Last message repeated 1 times
[h264 @ 0x3480010] Missing reference picture, default is 65772
    Last message repeated 1 times
Error while decoding stream #15:0: Invalid data found when processing input
[h264 @ 0x3472d80] reference picture missing during reorder
[h264 @ 0x3472d80] Missing reference picture, default is 65780
[h264 @ 0x34c4540] mmco: unref short failure
av_interleaved_write_frame(): Cannot allocate memory
[mp4 @ 0x295c7e0] Application provided duration: 3689347710924763697 / timestamp: 6291454 is out of range for mov/mp4 format
Segmentation fault


  


  Merging videos 2 by 2

  


  I then tried gradually merging videos into one, using multiple FFmpeg commands.

  


  # Pseudocode
final = merge(clip1, clip2)
final = merge(final, clip3)
final = merge(final, clip4)
final = merge(final, clip5)
...


  


  with each command, looking like this :

  


  ffmpeg -i 1Rbrdn1Xp.mp4 -i G7eYqdFPb.mp4 -y -filter_complex concat=n=2:v=1:a=1 -vsync 2 UMVDl9jki.mp4


  


  ffmpeg -i UMVDl9jki.mp4 -i -Xo-6ABm3.mp4 -y -filter_complex concat=n=2:v=1:a=1 -vsync 2 azE1Uombp.mp4


  


  This works but there is a loss in audio quality on the first clips, and it is slowly improving over time. I am guessing this is due to the first videos being merged more times than the last ones. You can see this effect happen in this video (weird artefacts in the voice).

  


  ---

  


  So, am I doing something wrong ?
  
Is there a way of merging a lot of videos, without running out of memory or worsening the audio quality ?

  


• FFmpeg Error while filtering : Cannot allocate memory While Using Gifs Overlay Over Video

  4 mars 2021, par Abhishek Sharma

  creating overlay gif over video but One gif is stoping after one loop and all other gifs are in a continuous loop by default in the file and FFmpeg throws an error

  


  Command :

  


  ffmpeg -y -i "2021_03_04_03_54_43.mp4" -f lavfi -i "color=000000:s=540x960" -ignore_loop 0 -i "2021_03_04_03_55_08.gif" -ignore_loop 0 -i "2021_03_04_03_56_19.gif" -ignore_loop 0 -i "2021_03_04_04_02_29.gif" -ignore_loop 0 -i "2021_03_04_04_03_50.gif" -filter_complex "[0:v]trim=0:15.047,setpts=PTS-STARTPTS[Clip_0_VideoTrim_0] ;[0:a]atrim=0:15.047,asetpts=PTS-STARTPTS,volume=1[Clip_0_AudioTrim_0] ;[1:v]crop=540:960:0:0,boxblur=luma_radius=10:chroma_radius=10:luma_power=1,scale=540:960[Clip_0_BG] ;[Clip_0_VideoTrim_0]scale=540:960[Clip_0_FG] ;[Clip_0_BG][Clip_0_FG]overlay=0:0:shortest=1[Clip_0_BackgroundOutput] ;[Clip_0_BackgroundOutput][Clip_0_AudioTrim_0]concat=n=1:v=1:a=1[ClipsVideoOut][ClipsAudioOut] ;[2:v]format=yuva444p,colorchannelmixer=aa=1,scale=226.374008178711 :-1,rotate=0:c=none:ow=rotw(0):oh=roth(0)[OverLay_2] ;[ClipsVideoOut][OverLay_2]overlay=enable='between(t,3.839,7.6)':x='(389.626037597656-(overlay_w/2))':y='(205.619873046875-(overlay_h/2))':shortest=1[OverlayLayer_2] ;[3:v]format=yuva444p,colorchannelmixer=aa=1,scale=179.254348754883 :-1,rotate=0:c=none:ow=rotw(0):oh=roth(0)[OverLay_3] ;[OverlayLayer_2][OverLay_3]overlay=enable='between(t,0,3.762)':x='(117.589767456055-(overlay_w/2))':y='(759.018127441406-(overlay_h/2))':shortest=1[OverlayLayer_3] ;[4:v]format=yuva444p,colorchannelmixer=aa=1,scale=326.199066162109 :-1,rotate=0:c=none:ow=rotw(0):oh=roth(0)[OverLay_4] ;[OverlayLayer_3][OverLay_4]overlay=enable='between(t,7.478,11.24)':x='(118.761810302734-(overlay_w/2))':y='(153.96012878418-(overlay_h/2))':shortest=1[OverlayLayer_4] ;[5:v]format=yuva444p,colorchannelmixer=aa=1,scale=268.915679931641 :-1,rotate=0:c=none:ow=rotw(0):oh=roth(0)[OverLay_5] ;[OverlayLayer_4][OverLay_5]overlay=enable='between(t,11.25,15.011)':x='(396.322570800781-(overlay_w/2))':y='(747.451477050781-(overlay_h/2))':shortest=1[OverlayOutput] ;[OverlayOutput][ClipsAudioOut]concat=n=1:v=1:a=1[OutputVideo][OutputAudio]" -map [OutputVideo] -map [OutputAudio] -c:v libx264 -c:a aac -b:a 256k -r 30 -preset ultrafast "2021_03_04_04_04_09.mp4" -hide_banner" ;

  


  ffmpeg Log :

  


  2021-03-04 16:04:10.092 +05:30 [INF] Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '2021_03_04_03_54_43.mp4':
2021-03-04 16:04:10.100 +05:30 [INF]   Metadata:
2021-03-04 16:04:10.112 +05:30 [INF]     major_brand     : isom
2021-03-04 16:04:10.123 +05:30 [INF]     minor_version   : 512
2021-03-04 16:04:10.131 +05:30 [INF]     compatible_brands: isomiso2avc1mp41
2021-03-04 16:04:10.141 +05:30 [INF]     encoder         : Lavf57.76.100
2021-03-04 16:04:10.151 +05:30 [INF]     comment         : vid:v090444d0000bivu4o5qa7loe16h27e0
2021-03-04 16:04:10.164 +05:30 [INF]     genre           : aweme_6677028628938787590
2021-03-04 16:04:10.202 +05:30 [INF]   Duration: 00:00:15.05, start: 0.000000, bitrate: 1562 kb/s
2021-03-04 16:04:10.253 +05:30 [INF]     Stream #0:0(und): Video: h264 (High) (avc1 / 0x31637661), yuv420p, 540x960, 1485 kb/s, 59.94 fps, 59.94 tbr, 60k tbn, 119.88 tbc (default)
2021-03-04 16:04:10.262 +05:30 [INF]     Metadata:
2021-03-04 16:04:10.275 +05:30 [INF]       handler_name    : VideoHandler
2021-03-04 16:04:10.303 +05:30 [INF]     Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 64 kb/s (default)
2021-03-04 16:04:10.309 +05:30 [INF]     Metadata:
2021-03-04 16:04:10.325 +05:30 [INF]       handler_name    : SoundHandler
2021-03-04 16:04:10.334 +05:30 [INF] Input #1, lavfi, from 'color=000000:s=540x960':
2021-03-04 16:04:10.366 +05:30 [INF]   Duration: N/A, start: 0.000000, bitrate: N/A
2021-03-04 16:04:10.403 +05:30 [INF]     Stream #1:0: Video: rawvideo (I420 / 0x30323449), yuv420p, 540x960 [SAR 1:1 DAR 9:16], 25 tbr, 25 tbn, 25 tbc
2021-03-04 16:04:10.416 +05:30 [INF] Input #2, gif, from '2021_03_04_03_55_08.gif':
2021-03-04 16:04:10.482 +05:30 [INF]   Duration: 00:00:00.20, start: 0.000000, bitrate: 2071 kb/s
2021-03-04 16:04:10.536 +05:30 [INF]     Stream #2:0: Video: gif, bgra, 269x386, 14.25 fps, 19.08 tbr, 100 tbn, 100 tbc
2021-03-04 16:04:10.570 +05:30 [INF] Input #3, gif, from '2021_03_04_03_56_19.gif':
2021-03-04 16:04:10.616 +05:30 [INF]   Duration: 00:00:01.47, start: 0.000000, bitrate: 11618 kb/s
2021-03-04 16:04:10.666 +05:30 [INF]     Stream #3:0: Video: gif, bgra, 300x300, 28.92 fps, 100 tbr, 100 tbn, 100 tbc
2021-03-04 16:04:10.680 +05:30 [INF] Input #4, gif, from '2021_03_04_04_02_29.gif':
2021-03-04 16:04:10.714 +05:30 [INF]   Duration: 00:00:00.90, start: 0.000000, bitrate: 824 kb/s
2021-03-04 16:04:10.793 +05:30 [INF]     Stream #4:0: Video: gif, bgra, 310x300, 20.67 fps, 19.75 tbr, 100 tbn, 100 tbc
2021-03-04 16:04:10.811 +05:30 [INF] Input #5, gif, from '2021_03_04_04_03_50.gif':
2021-03-04 16:04:10.845 +05:30 [INF]   Duration: 00:00:00.48, start: 0.000000, bitrate: 1516 kb/s
2021-03-04 16:04:10.871 +05:30 [INF]     Stream #5:0: Video: gif, bgra, 480x480, 14.33 fps, 12.25 tbr, 100 tbn, 100 tbc
2021-03-04 16:04:10.882 +05:30 [INF] Stream mapping:
2021-03-04 16:04:10.891 +05:30 [INF]   Stream #0:0 (h264) -> trim
2021-03-04 16:04:10.901 +05:30 [INF]   Stream #0:1 (aac) -> atrim
2021-03-04 16:04:10.913 +05:30 [INF]   Stream #1:0 (rawvideo) -> crop
2021-03-04 16:04:10.918 +05:30 [INF]   Stream #2:0 (gif) -> format
2021-03-04 16:04:10.926 +05:30 [INF]   Stream #3:0 (gif) -> format
2021-03-04 16:04:10.932 +05:30 [INF]   Stream #4:0 (gif) -> format
2021-03-04 16:04:10.935 +05:30 [INF]   Stream #5:0 (gif) -> format
2021-03-04 16:04:10.943 +05:30 [INF]   concat:out:v0 -> Stream #0:0 (libx264)
2021-03-04 16:04:10.949 +05:30 [INF]   concat:out:a0 -> Stream #0:1 (aac)
2021-03-04 16:04:10.951 +05:30 [INF] Press [q] to stop, [?] for help
2021-03-04 16:04:10.960 +05:30 [INF] frame=    0 fps=0.0 q=0.0 size=       0kB time=-577014:32:22.77 bitrate=  -0.0kbits/s speed=N/A    
2021-03-04 16:04:11.070 +05:30 [INF] [libx264 @ 2013EB00] using SAR=1/1
2021-03-04 16:04:11.092 +05:30 [INF] [libx264 @ 2013EB00] using cpu capabilities: none!
2021-03-04 16:04:11.116 +05:30 [INF] [libx264 @ 2013EB00] profile Constrained Baseline, level 3.1, 4:2:0, 8-bit
2021-03-04 16:04:11.119 +05:30 [INF] [libx264 @ 2013EB00] 264 - core 157 - H.264/MPEG-4 AVC codec - Copyleft 2003-2018 - http://www.videolan.org/x264.html - options: cabac=0 ref=1 deblock=0:0:0 analyse=0:0 me=dia subme=0 psy=1 psy_rd=1.00:0.00 mixed_ref=0 me_range=16 chroma_me=1 trellis=1 8x8dct=0 cqm=0 deadzone=21,11 fast_pskip=1 chroma_qp_offset=0 threads=6 lookahead_threads=1 sliced_threads=0 nr=0 decimate=1 interlaced=0 bluray_compat=0 constrained_intra=0 bframes=0 weightp=0 keyint=250 keyint_min=25 scenecut=0 intra_refresh=0 rc=crf mbtree=0 crf=23.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=0
2021-03-04 16:04:11.126 +05:30 [INF] Output #0, mp4, to '2021_03_04_04_04_09.mp4':
2021-03-04 16:04:11.129 +05:30 [INF]   Metadata:
2021-03-04 16:04:11.136 +05:30 [INF]     major_brand     : isom
2021-03-04 16:04:11.251 +05:30 [INF]     minor_version   : 512
2021-03-04 16:04:11.261 +05:30 [INF]     compatible_brands: isomiso2avc1mp41
2021-03-04 16:04:11.274 +05:30 [INF]     genre           : aweme_6677028628938787590
2021-03-04 16:04:11.282 +05:30 [INF]     comment         : vid:v090444d0000bivu4o5qa7loe16h27e0
2021-03-04 16:04:11.293 +05:30 [INF]     encoder         : Lavf58.45.100
2021-03-04 16:04:11.324 +05:30 [INF]     Stream #0:0: Video: h264 (libx264) (avc1 / 0x31637661), yuv420p(progressive), 540x960 [SAR 1:1 DAR 9:16], q=-1--1, 30 fps, 15360 tbn, 30 tbc (default)
2021-03-04 16:04:11.328 +05:30 [INF]     Metadata:
2021-03-04 16:04:11.338 +05:30 [INF]       encoder         : Lavc58.91.100 libx264
2021-03-04 16:04:11.341 +05:30 [INF]     Side data:
2021-03-04 16:04:11.358 +05:30 [INF]       cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: N/A
2021-03-04 16:04:11.377 +05:30 [INF]     Stream #0:1: Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 256 kb/s (default)
2021-03-04 16:04:11.380 +05:30 [INF]     Metadata:
2021-03-04 16:04:11.392 +05:30 [INF]       encoder         : Lavc58.91.100 aac
2021-03-04 16:04:11.469 +05:30 [INF] frame=    2 fps=0.0 q=0.0 size=       0kB time=00:00:00.04 bitrate=   8.3kbits/s speed=0.0928x    
2021-03-04 16:04:11.972 +05:30 [INF] frame=   16 fps= 16 q=25.0 size=       0kB time=00:00:00.46 bitrate=   0.8kbits/s dup=3 drop=0 speed=0.463x    
2021-03-04 16:04:12.480 +05:30 [INF] frame=   28 fps= 18 q=23.0 size=     256kB time=00:00:00.88 bitrate=2377.2kbits/s dup=5 drop=0 speed=0.582x    
2021-03-04 16:04:13.012 +05:30 [INF] frame=   41 fps= 20 q=23.0 size=     256kB time=00:00:01.34 bitrate=1557.5kbits/s dup=7 drop=0 speed=0.664x    
2021-03-04 16:04:13.493 +05:30 [INF] frame=   53 fps= 21 q=25.0 size=     512kB time=00:00:01.76 bitrate=2377.0kbits/s dup=9 drop=0 speed=0.696x    
2021-03-04 16:04:14.023 +05:30 [INF] frame=   66 fps= 22 q=22.0 size=     768kB time=00:00:02.18 bitrate=2882.6kbits/s dup=11 drop=0 speed=0.714x    
2021-03-04 16:04:14.535 +05:30 [INF] frame=   77 fps= 22 q=23.0 size=     768kB time=00:00:02.57 bitrate=2441.1kbits/s dup=13 drop=0 speed=0.724x    
2021-03-04 16:04:15.030 +05:30 [INF] frame=   91 fps= 22 q=24.0 size=    1024kB time=00:00:03.01 bitrate=2779.1kbits/s dup=15 drop=0 speed=0.743x    
2021-03-04 16:04:15.547 +05:30 [INF] frame=  104 fps= 23 q=23.0 size=    1280kB time=00:00:03.45 bitrate=3030.9kbits/s dup=17 drop=0 speed=0.756x    
2021-03-04 16:04:16.118 +05:30 [INF] frame=  109 fps= 21 q=23.0 size=    1280kB time=00:00:04.78 bitrate=2192.2kbits/s dup=18 drop=0 speed=0.942x    
2021-03-04 16:04:16.543 +05:30 [INF] frame=  109 fps= 20 q=23.0 size=    1280kB time=00:00:06.61 bitrate=1584.6kbits/s dup=18 drop=0 speed=1.19x    
2021-03-04 16:04:17.042 +05:30 [INF] frame=  109 fps= 18 q=23.0 size=    1280kB time=00:00:08.82 bitrate=1188.4kbits/s dup=18 drop=0 speed=1.45x    
2021-03-04 16:04:17.545 +05:30 [INF] frame=  109 fps= 17 q=23.0 size=    1280kB time=00:00:10.89 bitrate= 962.9kbits/s dup=18 drop=0 speed=1.65x    
2021-03-04 16:04:17.864 +05:30 [INF] Error while filtering: Cannot allocate memory
2021-03-04 16:04:17.889 +05:30 [INF] Failed to inject frame into filter network: Cannot allocate memory
2021-03-04 16:04:17.908 +05:30 [INF] Error while processing the decoded data for stream #0:0
2021-03-04 16:04:18.048 +05:30 [INF] [libx264 @ 2013EB00] frame I:1     Avg QP:20.00  size: 43401
2021-03-04 16:04:18.051 +05:30 [INF] [libx264 @ 2013EB00] frame P:101   Avg QP:23.36  size: 13076
2021-03-04 16:04:18.054 +05:30 [INF] [libx264 @ 2013EB00] mb I  I16..4: 100.0%  0.0%  0.0%
2021-03-04 16:04:18.058 +05:30 [INF] [libx264 @ 2013EB00] mb P  I16..4: 11.9%  0.0%  0.0%  P16..4: 44.6%  0.0%  0.0%  0.0%  0.0%    skip:43.5%
2021-03-04 16:04:18.062 +05:30 [INF] [libx264 @ 2013EB00] coded y,uvDC,uvAC intra: 34.5% 62.9% 16.0% inter: 23.5% 29.1% 3.2%
2021-03-04 16:04:18.064 +05:30 [INF] [libx264 @ 2013EB00] i16 v,h,dc,p: 35% 20% 19% 25%
2021-03-04 16:04:18.067 +05:30 [INF] [libx264 @ 2013EB00] i8c dc,h,v,p: 34% 22% 33% 12%
2021-03-04 16:04:18.071 +05:30 [INF] [libx264 @ 2013EB00] kb/s:3209.61
2021-03-04 16:04:18.076 +05:30 [INF] [aac @ 2013C440] Qavg: 2650.414
2021-03-04 16:04:18.081 +05:30 [INF] [aac @ 2013C440] 2 frames left in the queue on closing
2021-03-04 16:04:18.099 +05:30 [INF] Conversion failed!


  


• FFMPEG keeping quality when reducing FPS and streaming over RTSP with rtsp-simple-server

  25 janvier 2021, par Jens Schneider

  I'm using the rtsp-simple-server (https://github.com/aler9/rtsp-simple-server) and feed the RTSP Server with a FFMPEG stream.

  


  I use a docker compose file to start the stream :

  


  version: "3.8"

services:

  ffmpeg:
    container_name: ffmpeg-base
    restart: always
    image: "jenssgb/rtspffmpeg:base"
    depends_on:
      - rtsp-server
    volumes:
      - $PWD/:/video
    network_mode: "host"
    command: "ffmpeg -re -stream_loop -1 -i /video/footage-1-b.mp4 -c copy -f rtsp rtsp://localhost:8554/compose-rtsp"
  
  rtsp-server:
    container_name: rtsp-server-base
    restart: always
    image: "aler9/rtsp-simple-server"
    network_mode: "host"


  


  Now I'm trying to reduce the FPS of my video with transcoding it :

  


  command: -re -stream_loop -1 -i ${VIDEO_FILE} -vf "fps=${FPS_COMPOSE}" -f rtsp rtsp://localhost:8554/compose-rtsp


  


  This is basically working, but the quality of the output video becomes pretty bad. I tried a lot of things like -c:v libx264 which did help for a minute but let ffmpeg crash then.

  


  av_interleaved_write_frame(): Broken pipe0:00:09.99 bitrate=N/A speed=0.985x    
[rtsp @ 0x5563b1755640] Packets poorly interleaved, failed to avoid negative timestamp -33660 in stream 0.
Try -max_interleave_delta 0 as a possible workaround.
av_interleaved_write_frame(): Broken pipe
Error writing trailer of rtsp://localhost:8554/compose-rtsp: Broken pipe


  


  Any idea how I can reduce the FPS send the stream to the server but keep the video quality ? Later I'm going to reduce the resolution as well - but for now I want to keep resolution and quality but only reduce the FPS.

  


  Full logs from my test with -c:v libx264 :

  


      ffmpeg -re -stream_loop -1 -i footage-1-b.mp4 -vf "fps=5" -c:v libx264 -f rtsp rtsp://localhost:8554/compose-rtsp
ffmpeg version 4.2.4-1ubuntu0.1 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9 (Ubuntu 9.3.0-10ubuntu2)
  configuration: --prefix=/usr --extra-version=1ubuntu0.1 --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --arch=amd64 --enable-gpl --disable-stripping --enable-avresample --disable-filter=resample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libaom --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libcodec2 --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libjack --enable-libmp3lame --enable-libmysofa --enable-libopenjpeg --enable-libopenmpt --enable-libopus --enable-libpulse --enable-librsvg --enable-librubberband --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzmq --enable-libzvbi --enable-lv2 --enable-omx --enable-openal --enable-opencl --enable-opengl --enable-sdl2 --enable-libdc1394 --enable-libdrm --enable-libiec61883 --enable-nvenc --enable-chromaprint --enable-frei0r --enable-libx264 --enable-shared
  libavutil      56. 31.100 / 56. 31.100
  libavcodec     58. 54.100 / 58. 54.100
  libavformat    58. 29.100 / 58. 29.100
  libavdevice    58.  8.100 / 58.  8.100
  libavfilter     7. 57.100 /  7. 57.100
  libavresample   4.  0.  0 /  4.  0.  0
  libswscale      5.  5.100 /  5.  5.100
  libswresample   3.  5.100 /  3.  5.100
  libpostproc    55.  5.100 / 55.  5.100
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'footage-1-b.mp4':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    title           : Session streamed by "nessyMediaServer"
    encoder         : Lavf58.29.100
    comment         : h264_3
  Duration: 00:59:59.63, start: 0.000000, bitrate: 2099 kb/s
    Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], 2061 kb/s, 24.96 fps, 25 tbr, 12800 tbn, 25 tbc (default)
    Metadata:
      handler_name    : VideoHandler
    Stream #0:1(und): Audio: aac (LC) (mp4a / 0x6134706D), 8000 Hz, mono, fltp, 35 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
  Stream #0:1 -> #0:1 (aac (native) -> aac (native))
Press [q] to stop, [?] for help
[aac @ 0x56277bc7f840] Too many bits 8832.000000 > 6144 per frame requested, clamping to max
[libx264 @ 0x56277bbc33c0] using SAR=1/1
[libx264 @ 0x56277bbc33c0] using cpu capabilities: MMX2 SSE2Fast SSSE3 SSE4.2 AVX FMA3 BMI2 AVX2
[libx264 @ 0x56277bbc33c0] profile High, level 3.1
[libx264 @ 0x56277bbc33c0] 264 - core 155 r2917 0a84d98 - 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=12 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=5 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, rtsp, to 'rtsp://localhost:8554/compose-rtsp':
  Metadata:
    major_brand     : isom
    minor_version   : 512
    compatible_brands: isomiso2avc1mp41
    title           : Session streamed by "nessyMediaServer"
    comment         : h264_3
    encoder         : Lavf58.29.100
    Stream #0:0(und): Video: h264 (libx264), yuvj420p(pc), 1280x720 [SAR 1:1 DAR 16:9], q=-1--1, 5 fps, 90k tbn, 5 tbc (default)
    Metadata:
      handler_name    : VideoHandler
      encoder         : Lavc58.54.100 libx264
    Side data:
      cpb: bitrate max/min/avg: 0/0/0 buffer size: 0 vbv_delay: -1
    Stream #0:1(und): Audio: aac (LC), 8000 Hz, mono, fltp, 48 kb/s (default)
    Metadata:
      handler_name    : SoundHandler
      encoder         : Lavc58.54.100 aac
av_interleaved_write_frame(): Broken pipe0:00:09.87 bitrate=N/A speed=0.978x    
[rtsp @ 0x56277bba0640] Packets poorly interleaved, failed to avoid negative timestamp -33660 in stream 0.
Try -max_interleave_delta 0 as a possible workaround.
av_interleaved_write_frame(): Broken pipe
Error writing trailer of rtsp://localhost:8554/compose-rtsp: Broken pipe
frame=   50 fps=4.6 q=23.0 Lsize=N/A time=00:00:10.21 bitrate=N/A speed=0.947x    
video:162kB audio:8kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown
[libx264 @ 0x56277bbc33c0] frame I:1     Avg QP:19.85  size:165667
[libx264 @ 0x56277bbc33c0] frame P:13    Avg QP:20.88  size:140481
[libx264 @ 0x56277bbc33c0] frame B:36    Avg QP:24.58  size: 55445
[libx264 @ 0x56277bbc33c0] consecutive B-frames:  4.0%  0.0%  0.0% 96.0%
[libx264 @ 0x56277bbc33c0] mb I  I16..4:  4.4% 30.8% 64.8%
[libx264 @ 0x56277bbc33c0] mb P  I16..4:  4.1% 10.6% 20.0%  P16..4: 24.4% 24.8% 13.3%  0.0%  0.0%    skip: 2.6%
[libx264 @ 0x56277bbc33c0] mb B  I16..4:  0.8%  2.0%  4.0%  B16..8: 40.3% 14.5%  5.2%  direct:11.8%  skip:21.4%  L0:77.1% L1: 7.9% BI:14.9%
[libx264 @ 0x56277bbc33c0] 8x8 transform intra:30.1% inter:11.9%
[libx264 @ 0x56277bbc33c0] coded y,uvDC,uvAC intra: 82.5% 60.9% 26.6% inter: 55.0% 42.4% 2.7%
[libx264 @ 0x56277bbc33c0] i16 v,h,dc,p: 17% 26% 34% 23%
[libx264 @ 0x56277bbc33c0] i8 v,h,dc,ddl,ddr,vr,hd,vl,hu: 22% 33% 15%  3%  4%  5%  4%  3%  9%
[libx264 @ 0x56277bbc33c0] i4 v,h,dc,ddl,ddr,vr,hd,vl,hu: 20% 22% 13%  3% 17% 11%  5%  3%  6%
[libx264 @ 0x56277bbc33c0] i8c dc,h,v,p: 54% 25% 16%  5%
[libx264 @ 0x56277bbc33c0] Weighted P-Frames: Y:7.7% UV:7.7%
[libx264 @ 0x56277bbc33c0] ref P L0: 33.2% 11.6% 29.0% 23.9%  2.4%
[libx264 @ 0x56277bbc33c0] ref B L0: 79.6% 11.9%  8.5%
[libx264 @ 0x56277bbc33c0] ref B L1: 95.9%  4.1%
[libx264 @ 0x56277bbc33c0] kb/s:3190.34
[aac @ 0x56277bc7f840] Qavg: 65536.000
Conversion failed!


  


  Thank you,
J