Public bug reported: Here's an example file: http://superjoe.s3.amazonaws.com/temp/test- rg.mp3
When I run the "mp3gain" cli tool on it, I get this: Recommended "Track" dB change: -0.730000 Recommended "Track" mp3 gain change: 0 Max PCM sample at current gain: 7739.570901 Max mp3 global gain field: 150 Min mp3 global gain field: 128 Seems reasonable. But when I use my own program to feed data into libreplaygain I get bogus results. I looked into this further and created a simple test case that fails. Here's the test file, converted to 44100 Hz, mono, 64-bit float raw file: http://superjoe.s3.amazonaws.com/temp/test-rg-44100-64bit-mono.raw Here's some C code relying on libreplaygain to parse the file: #include <stdio.h> #include <replaygain/gain_analysis.h> int main (int argc, char **argv) { FILE *file = fopen(argv[1], "rb"); double buf[50000]; size_t bytes_read = fread(buf, 1, 400000, file); gain_init_analysis(44100); gain_analyze_samples(buf, NULL, bytes_read / 8, 1); fclose(file); printf("analyzed %lu samples\n", bytes_read / 8); printf("track gain: %f\n", gain_get_title()); } When I run this, I see: analyzed 47232 samples track gain: 0.000000 Am I missing something? Is there anywhere that a working replaygain example exists, perhaps a bit simpler than the source to mp3gain? ** Affects: libreplaygain (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to libreplaygain in Ubuntu. https://bugs.launchpad.net/bugs/1225557 Title: gives bogus values Status in “libreplaygain” package in Ubuntu: New Bug description: Here's an example file: http://superjoe.s3.amazonaws.com/temp/test- rg.mp3 When I run the "mp3gain" cli tool on it, I get this: Recommended "Track" dB change: -0.730000 Recommended "Track" mp3 gain change: 0 Max PCM sample at current gain: 7739.570901 Max mp3 global gain field: 150 Min mp3 global gain field: 128 Seems reasonable. But when I use my own program to feed data into libreplaygain I get bogus results. I looked into this further and created a simple test case that fails. Here's the test file, converted to 44100 Hz, mono, 64-bit float raw file: http://superjoe.s3.amazonaws.com/temp/test-rg-44100-64bit-mono.raw Here's some C code relying on libreplaygain to parse the file: #include <stdio.h> #include <replaygain/gain_analysis.h> int main (int argc, char **argv) { FILE *file = fopen(argv[1], "rb"); double buf[50000]; size_t bytes_read = fread(buf, 1, 400000, file); gain_init_analysis(44100); gain_analyze_samples(buf, NULL, bytes_read / 8, 1); fclose(file); printf("analyzed %lu samples\n", bytes_read / 8); printf("track gain: %f\n", gain_get_title()); } When I run this, I see: analyzed 47232 samples track gain: 0.000000 Am I missing something? Is there anywhere that a working replaygain example exists, perhaps a bit simpler than the source to mp3gain? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/libreplaygain/+bug/1225557/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
