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Revolution of Open-source and film making towards open film making
6 octobre 2011, par
Mis à jour : Juillet 2013
Langue : English
Type : Texte
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Sur d’autres sites (9176)
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After converting FLV to MP4 format using ffmpeg the MP4 file has 0 bytes [closed]
28 mars 2013, par user2138489Using
ffmpeg
I converted an FLV file to an MP4 file. But the MP4 file has 0 bytes. The command which i used to convert isffmpeg -i sample.flv -b 1104k -ab 122k sample.mp4
This is the output I got for the above ffmpeg command :
ffmpeg version 0.8.5-4:0.8.5-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers
built on Jan 24 2013 18:01:36 with gcc 4.6.3
*** THIS PROGRAM IS DEPRECATED ***
This program is only provided for compatibility and will be removed in a future release. Please use avconv instead.
[flv @ 0x64f7a0] Estimating duration from bitrate, this may be inaccurate
Input #0, flv, from '/home/kirthiga/Desktop/videopine/test.flv':
Metadata:
creationdate : Thu Mar 28 12:46:29
Duration: 00:00:09.82, start: 0.000000, bitrate: N/A
Stream #0.0: Video: flv, yuv420p, 320x240, 1k tbr, 1k tbn, 1k tbc
Stream #0.1: Audio: nellymoser, 22050 Hz, mono, s16
[buffer @ 0x64f720] w:320 h:240 pixfmt:yuv420p
encoder 'aac' is experimental and might produce bad results.
Add '-strict experimental' if you want to use it. -
ffmpeg set buf_len
2 avril 2013, par Jeetendra_Nath_JhaI have been taken input from the device file
/dev/video49
.using ffmpeg, following command writing from the terminal :
ffmpeg -f video4linux2 -i /dev/video49 -target ntsc-vcd -s 1920x1080 pixfmt:yuv420p -vstats -bufsize 225k -an -f mpegts -vcodec mpeg4 udp://127.0.0.1:10000?pkt_size=1316
but it gives an error given below :
ffmpeg version 1.2 Copyright (c) 2000-2013 the FFmpeg developers
built on Mar 20 2013 15:06:14 with gcc 4.4.3 (Ubuntu 4.4.3-4ubuntu5.1)
configuration:
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
[video4linux2,v4l2 @ 0x95862a0] buf_len[0] = 1048576 < expected frame size 3110400
/dev/video49: Cannot allocate memoryI don't know how to set the buf_len here...
because in an error it says that the buf_len is need to be set.
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Error compiling and building DashEncoder code and how to play the .mpd file when generated [closed]
11 avril 2013, par niuuI'm trying to build the DashEncoder code which I downloaded from github https://github.com/slederer/DASHEncoder. Well, I followed all the instructions given in the how to compile dash file. installed Gpac n X264 and compiled both successfully. Then did make of Dashencoder and ran it as ./Dashencoder. But I found some issues in it. Got this log :
==========DASH ENCODER===============
Unknown option in resourcefile : sql-pw :
current encoder x264
YES
x264 encoding @ 300 kbps : Pass 1
x264 : x264 —profile baseline —preset slow —verbose —fps 24 —vbv-maxrate 300 —vbv-bufsize 600 —scenecut 0 —keyint 48 —output /opt/lampp/htdocs/tests_updates/sintel_trailer_2k_480p24_300kbit.h264 /home/niu/sintel_trailer_2k_480p24.y4m >out.txt 2>&1
mkdir : cannot create directory/opt/lampp/htdocs/tests_updates/sintel_300kbit': File exists
cp: omitting directory/opt/lampp/htdocs/tests_updates/'
copy audio : cp /opt/lampp/htdocs/tests_updates/ /opt/lampp/htdocs/tests_updates/sintel_300kbit/MP4Box multiplexing Video : /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264
mp4box : MP4Box -add /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264 /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
AVC-H264 import - frame size 854 x 480 at 24.000 FPS
AVC Import results : 1253 samples - Slices : 27 I 1226 P 0 B - 1 SEI - 27 IDR
Saving to /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4 : 0.500 secs Interleaving
MP4Box multiplexing Audio :/opt/lampp/htdocs/tests_updates/sintel_300kbit/
mp4box : MP4Box -add /opt/lampp/htdocs/tests_updates/sintel_300kbit/ /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
Unknown input file type
Unknown input file type
Error importing /opt/lampp/htdocs/tests_updates/sintel_300kbit/ : Bad Parameter
MP4Box Cleaning ...
mp4box : MP4Box -no-sys /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
Saving /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4 : 0.500 secs Interleaving
MP4Box segmentation : /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.h264
mp4box : MP4Box -frag 2000 -dash 2000 -rap -segment-name /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
DASH-ing file : 2.00s segments 2.00s fragments single sidx per segment
Spliting segments at GOP boundaries
[DASH] Generating MPD at time 2013-03-16T16:40:03Z
DASHing file /opt/lampp/htdocs/tests_updates/sintel_300kbit/sintel_trailer_2k_480p24_300kbit.mp4
terminate called after throwing an instance of 'std::out_of_range'
what() : basic_string::substr
Error : Unable to open MPD file !Aborted
Why is this error at the end ? and also one folder got created in my /opt/lampp/htdocs/tests_updates/sintel_300kbit. which has two types of files : 27 files of .m4s extension 1 file -sintelinit.mp4 1 file- sintel_trailer_2k_480p24_300kbit.mp4 , which when played in vlc player played the video bt no audio ! &1 file- sintel_trailer_2k_480p24_300kbit.h264 which cannot be opened.
No .mpd file was created.
Also I want to know aft creating that .mpd file how will i be able to test it on my android client say media player.
I am damn confused with all this happening. Please help