transcode with ffmpeg may eat up a lot of memory

[JasonZhang]

Summary of the bug:
When I transcode this source file with ffmpeg,ffmpeg may eat up a lot of memory about dozens of GB.

the report here:
ffmpeg started on 2017-12-19 at 10:59:15
Report written to "ffmpeg-20171219-105915.log"
Command line:
ffmpeg -i memory_error_fifo.mp4 -s 854x480 -vcodec libx264 -x264opts "keyint=50" -b:v 238k -vf "movie=namei.jpg [watermark]; [vf0] fifo [vf1];[vf1][watermark] overlay=main_w-overlay_w-0:0[vf2]" -acodec libfdk_aac -ar 44100 -movflags faststart -f mp4 output.mp4 -y -v trace -report
ffmpeg version N-89095-gb3c1172 Copyright (c) 2000-2017 the FFmpeg developers

built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-18)
configuration: --enable-gpl --enable-nonfree --enable-avresample --enable-libx264 --enable-libx265 --enable-libxvid --enable-libqy265 --enable-libfdk-aac --enable-openssl --enable-ffplay --enable-libfreetype --extra-cflags='-I/usr/local/include -Iext/deps/include' --extra-ldflags='-L/usr/local/lib -Lext/deps/lib_soft' --extra-libs='-lFastUdx -lqy265 -lx264 -lx265 -lfdk-aac -lcurl -lstdc++ -ldl -lpthread -lm' --prefix=/home/zhangzhixin/workdir/misc/ffmpeg/build
libavutil 56. 0.100 / 56. 0.100
libavcodec 58. 3.102 / 58. 3.102
libavformat 58. 2.100 / 58. 2.100
libavdevice 58. 0.100 / 58. 0.100
libavfilter 7. 0.101 / 7. 0.101
libavresample 4. 0. 0 / 4. 0. 0
libswscale 5. 0.101 / 5. 0.101
libswresample 3. 0.101 / 3. 0.101
libpostproc 55. 0.100 / 55. 0.100

Splitting the commandline.
Reading option '-i' ... matched as input url with argument 'memory_error_fifo.mp4'.
Reading option '-s' ... matched as option 's' (set frame size (WxH or abbreviation)) with argument '854x480'.
Reading option '-vcodec' ... matched as option 'vcodec' (force video codec ('copy' to copy stream)) with argument 'libx264'.
Reading option '-x264opts' ... matched as AVOption 'x264opts' with argument 'keyint=50'.
Reading option '-b:v' ... matched as option 'b' (video bitrate (please use -b:v)) with argument '238k'.
Reading option '-vf' ... matched as option 'vf' (set video filters) with argument 'movie=namei.jpg [watermark]; [vf0] fifo [vf1];[vf1][watermark] overlay=main_w-overlay_w-0:0[vf2]'.
Reading option '-acodec' ... matched as option 'acodec' (force audio codec ('copy' to copy stream)) with argument 'libfdk_aac'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '44100'.
Reading option '-movflags' ... matched as AVOption 'movflags' with argument 'faststart'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'mp4'.
Reading option 'output.mp4' ... matched as output url.
Reading option '-y' ... matched as option 'y' (overwrite output files) with argument '1'.
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'trace'.
Reading option '-report' ... matched as option 'report' (generate a report) with argument '1'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option y (overwrite output files) with argument 1.
Applying option v (set logging level) with argument trace.
Applying option report (generate a report) with argument 1.
Successfully parsed a group of options.
Parsing a group of options: input url memory_error_fifo.mp4.
Successfully parsed a group of options.
Opening an input file: memory_error_fifo.mp4.
[NULL @ 0x2d76ba0] Opening 'memory_error_fifo.mp4' for reading
[file @ 0x2d77420] Setting default whitelist 'file,crypto'
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] ISO: File Type Major Brand: isom
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] Processing st: 0, edit list 0 - media time: 0, duration: 148409010
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] Before avformat_find_stream_info() pos: 181496607 bytes read:1197919 seeks:1 nb_streams:2
[h264 @ 0x2d78480] nal_unit_type: 7, nal_ref_idc: 3
[h264 @ 0x2d78480] nal_unit_type: 8, nal_ref_idc: 3
[h264 @ 0x2d78480] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d78480] nal_unit_type: 5, nal_ref_idc: 3
[h264 @ 0x2d78480] Reinit context to 1280x720, pix_fmt: yuv420p
[h264 @ 0x2d78480] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d78480] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x2d78480] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d78480] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x2d78480] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d78480] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x2d78480] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d78480] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x2d78480] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d78480] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x2d78480] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d78480] nal_unit_type: 1, nal_ref_idc: 2
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] max_analyze_duration 5000000 reached at 5015270 microseconds st:0
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x2d76ba0] After avformat_find_stream_info() pos: 70798 bytes read:1296223 seeks:2 frames:147
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'memory_error_fifo.mp4':

Metadata:

major_brand : isom
minor_version : 512
compatible_brands: isomiso2avc1mp41
creation_time : 1970-01-01T00:00:00.000000Z

Duration: 01:22:26.97, start: 0.000000, bitrate: 293 kb/s

Stream #0:0(und), 147, 1/30000: Video: h264 (High), 1 reference frame (avc1 / 0x31637661), yuv420p(tv, bt709, left), 1280x720 [SAR 1:1 DAR 16:9], 0/1, 238 kb/s, 29.31 fps, 30 tbr, 30k tbn, 60 tbc (default)
Metadata:

creation_time : 1970-01-01T00:00:00.000000Z
handler_name : VideoHandler

Stream #0:1(und), 0, 1/44100: Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 0 kb/s (default)
Metadata:

creation_time : 1970-01-01T00:00:00.000000Z
handler_name : SoundHandler

Successfully opened the file.
Parsing a group of options: output url output.mp4.
Applying option s (set frame size (WxH or abbreviation)) with argument 854x480.
Applying option vcodec (force video codec ('copy' to copy stream)) with argument libx264.
Applying option b:v (video bitrate (please use -b:v)) with argument 238k.
Applying option vf (set video filters) with argument movie=namei.jpg [watermark]; [vf0] fifo [vf1];[vf1][watermark] overlay=main_w-overlay_w-0:0[vf2].
Applying option acodec (force audio codec ('copy' to copy stream)) with argument libfdk_aac.
Applying option ar (set audio sampling rate (in Hz)) with argument 44100.
Applying option f (force format) with argument mp4.
Successfully parsed a group of options.
Opening an output file: output.mp4.
[file @ 0x3883cc0] Setting default whitelist 'file,crypto'
Successfully opened the file.
detected 2 logical cores
[h264 @ 0x2d9ece0] nal_unit_type: 7, nal_ref_idc: 3
[h264 @ 0x2d9ece0] nal_unit_type: 8, nal_ref_idc: 3
Stream mapping:

Stream #0:0 -> #0:0 (h264 (native) -> h264 (libx264))
Stream #0:1 -> #0:1 (aac (native) -> aac (libfdk_aac))

Press [q] to stop, ? for help
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d9ece0] nal_unit_type: 5, nal_ref_idc: 3
[h264 @ 0x2d9ece0] Reinit context to 1280x720, pix_fmt: yuv420p
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x3280cc0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x3280cc0] nal_unit_type: 1, nal_ref_idc: 2
[Parsed_movie_0 @ 0x32b9aa0] Setting 'filename' to value 'namei.jpg'
[NULL @ 0x2dcc7c0] Opening 'namei.jpg' for reading
[file @ 0x3883fe0] Setting default whitelist 'file,crypto'
[image2 @ 0x2dcc7c0] Format image2 probed with size=2048 and score=50
[image2 @ 0x2dcc7c0] Before avformat_find_stream_info() pos: 0 bytes read:32768 seeks:0 nb_streams:1
[mjpeg @ 0x2dcd720] marker=d8 avail_size_in_buf=43205
[mjpeg @ 0x2dcd720] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x2dcd720] marker=e0 avail_size_in_buf=43203
[mjpeg @ 0x2dcd720] marker parser used 16 bytes (128 bits)
[mjpeg @ 0x2dcd720] marker=e1 avail_size_in_buf=43185
[mjpeg @ 0x2dcd720] marker parser used 47 bytes (376 bits)
[mjpeg @ 0x2dcd720] marker=db avail_size_in_buf=43135
[mjpeg @ 0x2dcd720] index=0
[mjpeg @ 0x2dcd720] qscale[0]: 0
[mjpeg @ 0x2dcd720] marker parser used 67 bytes (536 bits)
[mjpeg @ 0x2dcd720] marker=db avail_size_in_buf=43066
[mjpeg @ 0x2dcd720] index=1
[mjpeg @ 0x2dcd720] qscale[1]: 0
[mjpeg @ 0x2dcd720] marker parser used 67 bytes (536 bits)
[mjpeg @ 0x2dcd720] marker=c0 avail_size_in_buf=42997
[mjpeg @ 0x2dcd720] Changing bps from 0 to 8
[mjpeg @ 0x2dcd720] sof0: picture: 200x200
[mjpeg @ 0x2dcd720] component 0 1:1 id: 0 quant:0
[mjpeg @ 0x2dcd720] component 1 1:1 id: 1 quant:1
[mjpeg @ 0x2dcd720] component 2 1:1 id: 2 quant:1
[mjpeg @ 0x2dcd720] pix fmt id 11111100
[mjpeg @ 0x2dcd720] marker parser used 17 bytes (136 bits)
[mjpeg @ 0x2dcd720] marker=c4 avail_size_in_buf=42978
[mjpeg @ 0x2dcd720] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x2dcd720] marker=c4 avail_size_in_buf=42945
[mjpeg @ 0x2dcd720] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x2dcd720] marker=c4 avail_size_in_buf=42762
[mjpeg @ 0x2dcd720] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x2dcd720] marker=c4 avail_size_in_buf=42729
[mjpeg @ 0x2dcd720] marker parser used 0 bytes (0 bits)
[mjpeg @ 0x2dcd720] escaping removed 792 bytes
[mjpeg @ 0x2dcd720] marker=da avail_size_in_buf=42546
[mjpeg @ 0x2dcd720] marker parser used 41754 bytes (334032 bits)
[mjpeg @ 0x2dcd720] marker=d9 avail_size_in_buf=0
[mjpeg @ 0x2dcd720] decode frame unused 0 bytes
[image2 @ 0x2dcc7c0] After avformat_find_stream_info() pos: 43207 bytes read:43207 seeks:0 frames:1
[Parsed_movie_0 @ 0x32b9aa0] seek_point:0 format_name:(null) file_name:namei.jpg stream_index:-1
[Parsed_overlay_2 @ 0x2dcfb00] Setting 'x' to value 'main_w-overlay_w-0'
[Parsed_overlay_2 @ 0x2dcfb00] Setting 'y' to value '0'
[graph 0 input from stream 0:0 @ 0x2dd5940] Setting 'video_size' to value '1280x720'
[graph 0 input from stream 0:0 @ 0x2dd5940] Setting 'pix_fmt' to value '0'
[graph 0 input from stream 0:0 @ 0x2dd5940] Setting 'time_base' to value '1/30000'
[graph 0 input from stream 0:0 @ 0x2dd5940] Setting 'pixel_aspect' to value '1/1'
[graph 0 input from stream 0:0 @ 0x2dd5940] Setting 'sws_param' to value 'flags=2'
[graph 0 input from stream 0:0 @ 0x2dd5940] Setting 'frame_rate' to value '30/1'
[graph 0 input from stream 0:0 @ 0x2dd5940] w:1280 h:720 pixfmt:yuv420p tb:1/30000 fr:30/1 sar:1/1 sws_param:flags=2
[scaler_out_0_0 @ 0x2dd68a0] Setting 'w' to value '854'
[scaler_out_0_0 @ 0x2dd68a0] Setting 'h' to value '480'
[scaler_out_0_0 @ 0x2dd68a0] Setting 'flags' to value 'bicubic'
[scaler_out_0_0 @ 0x2dd68a0] w:854 h:480 flags:'bicubic' interl:0
[format @ 0x2dcf1e0] Setting 'pix_fmts' to value 'yuv420p|yuvj420p|yuv422p|yuvj422p|yuv444p|yuvj444p|nv12|nv16|nv21'
[auto_scaler_0 @ 0x2f15c20] Setting 'flags' to value 'bicubic'
[auto_scaler_0 @ 0x2f15c20] w:iw h:ih flags:'bicubic' interl:0
[Parsed_overlay_2 @ 0x2dcfb00] auto-inserting filter 'auto_scaler_0' between the filter 'Parsed_movie_0' and the filter 'Parsed_overlay_2'
[AVFilterGraph @ 0x2d76880] query_formats: 7 queried, 5 merged, 1 already done, 0 delayed
[swscaler @ 0x2def720] deprecated pixel format used, make sure you did set range correctly
[auto_scaler_0 @ 0x2f15c20] w:200 h:200 fmt:yuvj444p sar:1/1 -> w:200 h:200 fmt:yuva420p sar:1/1 flags:0x4
[Parsed_overlay_2 @ 0x2dcfb00] main w:1280 h:720 fmt:yuv420p overlay w:200 h:200 fmt:yuva420p
[Parsed_overlay_2 @ 0x2dcfb00] [framesync @ 0x2dcfc48] Selected 1/30000 time base
[Parsed_overlay_2 @ 0x2dcfb00] [framesync @ 0x2dcfc48] Sync level 2
[scaler_out_0_0 @ 0x2dd68a0] w:1280 h:720 fmt:yuv420p sar:1/1 -> w:854 h:480 fmt:yuv420p sar:1280/1281 flags:0x4
[libx264 @ 0x2d7f2a0] using mv_range_thread = 72
[libx264 @ 0x2d7f2a0] using SAR=1280/1281
[libx264 @ 0x2d7f2a0] using cpu capabilities: none!
[libx264 @ 0x2d7f2a0] profile High, level 3.1
[libx264 @ 0x2d7f2a0] 264 - core 152 r2851 ba24899 - H.264/MPEG-4 AVC codec - Copyleft 2003-2017 - ​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=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=2 keyint=50 keyint_min=5 scenecut=40 intra_refresh=0 rc_lookahead=40 rc=abr mbtree=1 bitrate=238 ratetol=1.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 ip_ratio=1.40 aq=1:1.00
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d9ece0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x3280cc0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x3280cc0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d9ece0] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3280cc0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x3280cc0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d9ece0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3280cc0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x3280cc0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d9ece0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x3280cc0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x3280cc0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d9ece0] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3280cc0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x3280cc0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x2d9ece0] nal_unit_type: 1, nal_ref_idc: 2
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x3280cc0] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x3280cc0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 9, nal_ref_idc: 0
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x2d9ece0] nal_unit_type: 1, nal_ref_idc: 2
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
cur_dts is invalid (this is harmless if it occurs once at the start per stream)
[h264 @ 0x32f8340] nal_unit_type: 9, nal_ref_idc: 0
[h264 @ 0x32f8340] nal_unit_type: 1, nal_ref_idc: 2

How to reproduce:
ffmpeg -i "memory_error_fifo.mp4" -s 854x480 -vcodec libx264 -x264opts keyint=50 -b:v 238k -vf "movie=namei.jpg [watermark]; [vf0] fifo [vf1];[vf1][watermark] overlay=main_w-overlay_w-0:0[vf2]" -acodec libfdk_aac -ar 44100 -movflags faststart -f mp4 output.mp4 -y -v trace -report
n3.5-dev-1292-gce001bb with master commit ce001bb8fc6677541c401a614e05e5058d58dde1
built on linux

attached source file: ​https://pan.baidu.com/s/1pLzbwbp

[Carl Eugen Hoyos]

Isn't what you describe exactly what the fifo filter is supposed to do? Why is it part of your filter chain?

[JasonZhang]

My complete ffmpeg command:
./ffmpeg -i "test.mp4" -s 854x480 -vcodec libx264 -x264opts keyint=50 -b:v 238k -vf "movie=t01934a04f8ecfe144e.png:loop=0,setpts=N/FRAME_RATE/TB,scale=1280*25/100*1/1:ih*1280*25/100/iw [watermark]; [vf0] fifo [vf1];[vf1][watermark] overlay=main_w-overlay_w-0:0:eof_action=endall[vf2]" -acodec libfdk_aac -ar 44100 -movflags faststart -f mp4 output.mp4

If "fifo" filter not used,another error occured,reference link here:

​https://stackoverflow.com/questions/40735986/ffmpeg-buffer-queue-overflow-dropping-with-trim-and-atrim-filters

error log:
[Parsed_overlay_3 @ 0x3e2ee80] [framesync @ 0x34702a8] Buffer queue overflow, dropping.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3306d60] stream 0, sample 7162, dts 238733333
[Parsed_overlay_3 @ 0x3e2ee80] Copying data in avfilter.
[Parsed_overlay_3 @ 0x3e2ee80] Incoming frame (time:238.667) from link #0
[Parsed_overlay_3 @ 0x3e2ee80] [framesync @ 0x34702a8] Buffer queue overflow, dropping.
[mov,mp4,m4a,3gp,3g2,mj2 @ 0x3306d60] stream 0, sample 7163, dts 238766667

[JasonZhang]

And I run the same ffmpeg command with other source file,the transcode result is ok and the memory is within the range of nomal use. Why and how to fix it for this issue?

thanks

[Carl Eugen Hoyos]

Please provide the input file.

[JasonZhang]

Replying to cehoyos:

Please provide the input file.

The input file here,you can download here: ​​https://pan.baidu.com/s/1pLzbwbp

if I cut the sample file down to size of 10 megabytes,it is too short to show the result

thx

[Carl Eugen Hoyos]

Replying to JasonZhang:

Replying to cehoyos:

Please provide the input file.

The input file here,you can download here: ​​https://pan.baidu.com/s/1pLzbwbp

404 (actually 啊哦，你所访问的页面不存在了 which btw is not very helpful)

[JasonZhang]

I uploaded with the ​VideoLAN File Uploader ​https://streams.videolan.org/upload/ and named as memory_error_fifo.mp4 with Trac Ticket #6922
Can you access to this uploader site and find the sample file?

thx

[JasonZhang]

I uploaded with the ​VideoLAN File Uploader ​https://streams.videolan.org/upload/ and named as memory_error_fifo.mp4 with Trac Ticket #6922
Can you access to this uploader site and find the sample file?

thx

[Carl Eugen Hoyos]

I can access the upload site but your file isn't there (the site sadly is very unreliable).

[JasonZhang]

Try this link please, ​https://yunpan.360.cn/surl_ywSGAAvCL7c

thx

[Carl Eugen Hoyos]

It appears to me that the input file contains no audio, trying to produce an output audio stream will have unexpected results, either ffmpeg trying to queue video until audio appears, eventually giving up, or fifo buffering the whole video stream waiting for audio.

All (?) other demuxers do not detect an audio stream (FFmpeg does), so this may be a bug in FFmpeg.