html5 video filter,html5 video - ffmpeg: Too many bits per frame requested - Stack Overflow

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Sometimes there is an issue when i try to convert to mp4 using ffmpeg. I'm getting issue Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height.

This is the command:

ffmpeg -y -i input.mp4 -i watermark.png -filter_complex 'scale=-2:360,overlay=(main_w-overlay_w)-20:(main_h-overlay_h)-20' -codec:v libx264 -profile:v main -preset slow -b:v 300k -maxrate 300k -bufsize 600k -threads 0 -codec:a aac -strict experimental -b:a 128k -crf 20 output.mp4 1> output.log 2>&1

Here the error log:

ffmpeg version 2.4.3 Copyright (c) 2000-2014 the FFmpeg developers

built on Nov 16 2014 22:36:57 with gcc 4.8.2 (GCC)

configuration: --prefix=/usr --libdir=/usr/lib64 --shlibdir=/usr/lib64 --mandir=/usr/man --docdir=/usr/doc/ffmpeg-2.4.3 --enable-gpl --enable-version3 --enable-avfilter --enable-avresample --enable-libass --enable-libdc1394 --enable-libgsm --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopus --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libzvbi --enable-postproc --enable-runtime-cpudetect --enable-vaapi --enable-vdpau --enable-memalign-hack --enable-pthreads --enable-x11grab --enable-bzlib --enable-zlib --enable-shared --enable-static --disable-debug --arch=x86_64 --enable-pic --extra-cflags='-I/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/include -DRUNTIME_CPUDETECT' --extra-ldflags='-L/tmp/build/tmp-ffmpeg/ffmpegdeps/usr/lib64 -ldl -lssl -lcrypto -lz -lusb' --pkg-config-flags=--static

libavutil 54. 7.100 / 54. 7.100

libavcodec 56. 1.100 / 56. 1.100

libavformat 56. 4.101 / 56. 4.101

libavdevice 56. 0.100 / 56. 0.100

libavfilter 5. 1.100 / 5. 1.100

libavresample 2. 1. 0 / 2. 1. 0

libswscale 3. 0.100 / 3. 0.100

libswresample 1. 1.100 / 1. 1.100

libpostproc 53. 0.100 / 53. 0.100

Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'input.mp4':

Metadata:

major_brand : isom

minor_version : 512

compatible_brands: isomiso2avc1mp41

encoder : Lavf56.15.102

Duration: 00:00:06.76, start: 0.000000, bitrate: 1856 kb/s

Stream #0:0(eng): Video: h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 720x480, 1804 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

Metadata:

handler_name : VideoHandler

Stream #0:1(eng): Audio: aac (mp4a / 0x6134706D), 16000 Hz, mono, fltp, 54 kb/s (default)

Metadata:

handler_name : SoundHandler

Input #1, png_pipe, from 'watermark.png':

Duration: N/A, bitrate: N/A

Stream #1:0: Video: png, rgba, 120x35, 25 tbr, 25 tbn, 25 tbc

[libx264 @ 0x2179d80] using cpu capabilities: MMX2 SSE2Fast SSSE3 Cache64 SlowShuffle

[libx264 @ 0x2179d80] profile Main, level 3.0

[libx264 @ 0x2179d80] 264 - core 142 - H.264/MPEG-4 AVC codec - Copyleft 2003-2014 - http://www.videolan.org/x264.html - options: cabac=1 ref=5 deblock=1:0:0 analyse=0x1:0x111 me=umh subme=8 psy=1 psy_rd=1.00:0.00 mixed_ref=1 me_range=16 chroma_me=1 trellis=1 8x8dct=0 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=2 b_bias=0 direct=3 weightb=1 open_gop=0 weightp=2 keyint=250 keyint_min=25 scenecut=40 intra_refresh=0 rc_lookahead=50 rc=crf mbtree=1 crf=20.0 qcomp=0.60 qpmin=0 qpmax=69 qpstep=4 vbv_maxrate=300 vbv_bufsize=600 crf_max=0.0 nal_hrd=none filler=0 ip_ratio=1.40 aq=1:1.00

[aac @ 0x217ba40] Too many bits per frame requested

Output #0, mp4, to 'output.mp4':

Metadata:

major_brand : isom

minor_version : 512

compatible_brands: isomiso2avc1mp41

encoder : Lavf56.15.102

Stream #0:0: Video: h264 (libx264), yuv420p, 540x360, q=-1--1, 300 kb/s, 30 fps, 30 tbn, 30 tbc (default)

Metadata:

encoder : Lavc56.1.100 libx264

Stream #0:1(eng): Audio: aac, 0 channels, 128 kb/s (default)

Metadata:

handler_name : SoundHandler

encoder : Lavc56.1.100 aac

Stream mapping:

Stream #0:0 (h264) -> scale (graph 0)

Stream #1:0 (png) -> overlay:overlay (graph 0)

overlay (graph 0) -> Stream #0:0 (libx264)

Stream #0:1 -> #0:1 (aac (native) -> aac (native))

Error while opening encoder for output stream #0:1 - maybe incorrect parameters such as bit_rate, rate, width or height

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